3043 lines
117 KiB
Java
3043 lines
117 KiB
Java
package lc.server;
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/*
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* Copyright © 2005-2018 Amichai Rothman
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*
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* This file is part of JLHTTP - the Java Lightweight HTTP Server.
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*
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* JLHTTP is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* JLHTTP is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with JLHTTP. If not, see <http://www.gnu.org/licenses/>.
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*
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* For additional info see http://www.freeutils.net/source/jlhttp/
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*/
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import java.io.*;
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import java.lang.annotation.*;
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import java.lang.reflect.*;
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import java.net.*;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.*;
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import java.util.concurrent.*;
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import java.util.zip.DeflaterOutputStream;
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import java.util.zip.GZIPOutputStream;
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import javax.net.ServerSocketFactory;
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import javax.net.ssl.SSLServerSocketFactory;
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import javax.net.ssl.SSLSocket;
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/**
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* The {@code lc.HTTPServer} class implements a light-weight HTTP server.
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*
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* <p>This server implements all functionality required by RFC 2616 ("Hypertext Transfer Protocol --
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* HTTP/1.1"), as well as some of the optional functionality (this is termed "conditionally
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* compliant" in the RFC). In fact, a couple of bugs in the RFC itself were discovered (and fixed)
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* during the development of this server.
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*
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* <p><b>Feature Overview</b>
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*
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* <ul>
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* <li>RFC compliant - correctness is not sacrificed for the sake of size
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* <li>Virtual hosts - multiple domains and subdomains per server
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* <li>File serving - built-in handler to serve files and folders from disk
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* <li>Mime type mappings - configurable via API or a standard mime.types file
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* <li>Directory index generation - enables browsing folder contents
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* <li>Welcome files - configurable default filename (e.g. index.html)
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* <li>All HTTP methods supported - GET/HEAD/OPTIONS/TRACE/POST/PUT/DELETE/custom
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* <li>Conditional statuses - ETags and If-* header support
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* <li>Chunked transfer encoding - for serving dynamically-generated data streams
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* <li>Gzip/deflate compression - reduces bandwidth and download time
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* <li>HTTPS - secures all server communications
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* <li>Partial content - download continuation (a.k.a. byte range serving)
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* <li>File upload - multipart/form-data handling as stream or iterator
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* <li>Multiple context handlers - a different handler method per URL path
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* <li>@Context annotations - auto-detection of context handler methods
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* <li>Parameter parsing - from query string or x-www-form-urlencoded body
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* <li>A single source file - super-easy to integrate into any application
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* <li>Standalone - no dependencies other than the Java runtime
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* <li>Small footprint - standard jar is ~50K, stripped jar is ~35K
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* <li>Extensible design - easy to override, add or remove functionality
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* <li>Reusable utility methods to simplify your custom code
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* <li>Extensive documentation of API and implementation (>40% of source lines)
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* </ul>
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*
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* <p><b>Use Cases</b>
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*
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* <p>Being a lightweight, standalone, easily embeddable and tiny-footprint server, it is
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* well-suited for
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*
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* <ul>
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* <li>Resource-constrained environments such as embedded devices. For really extreme constraints,
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* you can easily remove unneeded functionality to make it even smaller (and use the
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* -Dstripped maven build option to strip away debug info, license, etc.)
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* <li>Unit and integration tests - fast setup/teardown times, small overhead and simple context
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* handler setup make it a great web server for testing client components under various server
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* response conditions.
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* <li>Embedding a web console into any headless application for administration, monitoring, or a
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* full portable GUI.
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* <li>A full-fledged standalone web server serving static files, dynamically-generated content,
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* REST APIs, pseudo-streaming, etc.
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* <li>A good reference for learning how HTTP works under the hood.
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* </ul>
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*
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* <p><b>Implementation Notes</b>
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*
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* <p>The design and implementation of this server attempt to balance correctness, compliance,
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* readability, size, features, extensibility and performance, and often prioritize them in this
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* order, but some trade-offs must be made.
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*
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* <p>This server is multithreaded in its support for multiple concurrent HTTP connections, however
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* most of its constituent classes are not thread-safe and require external synchronization if
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* accessed by multiple threads concurrently.
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*
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* <p><b>Source Structure and Documentation</b>
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*
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* <p>This server is intentionally written as a single source file, in order to make it as easy as
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* possible to integrate into any existing project - by simply adding this single file to the
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* project sources. It does, however, aim to maintain a structured and flexible design. There are no
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* external package dependencies.
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*
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* <p>This file contains extensive documentation of its classes and methods, as well as
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* implementation details and references to specific RFC sections which clarify the logic behind the
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* code. It is recommended that anyone attempting to modify the protocol-level functionality become
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* acquainted with the RFC, in order to make sure that protocol compliance is not broken.
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*
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* <p><b>Getting Started</b>
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*
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* <p>For an example and a good starting point for learning how to use the API, see the {@link #main
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* main} method at the bottom of the file, and follow the code into the API from there.
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* Alternatively, you can just browse through the classes and utility methods and read their
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* documentation and code.
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*
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* @author Amichai Rothman
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* @since 2008-07-24
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*/
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public class HTTPServer {
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/**
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* The SimpleDateFormat-compatible formats of dates which must be supported. Note that all
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* generated date fields must be in the RFC 1123 format only, while the others are supported by
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* recipients for backwards-compatibility.
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*/
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public static final String[] DATE_PATTERNS = {
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"EEE, dd MMM yyyy HH:mm:ss z", // RFC 822, updated by RFC 1123
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"EEEE, dd-MMM-yy HH:mm:ss z", // RFC 850, obsoleted by RFC 1036
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"EEE MMM d HH:mm:ss yyyy" // ANSI C's asctime() format
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};
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/** A GMT (UTC) timezone instance. */
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protected static final TimeZone GMT = TimeZone.getTimeZone("GMT");
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/** Date format strings. */
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protected static final char[] DAYS = "Sun Mon Tue Wed Thu Fri Sat".toCharArray(),
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MONTHS = "Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec".toCharArray();
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/** A convenience array containing the carriage-return and line feed chars. */
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public static final byte[] CRLF = {0x0d, 0x0a};
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/** The HTTP status description strings. */
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protected static final String[] statuses = new String[600];
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static {
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// initialize status descriptions lookup table
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Arrays.fill(statuses, "Unknown Status");
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statuses[100] = "Continue";
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statuses[200] = "OK";
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statuses[204] = "No Content";
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statuses[206] = "Partial Content";
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statuses[301] = "Moved Permanently";
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statuses[302] = "Found";
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statuses[304] = "Not Modified";
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statuses[307] = "Temporary Redirect";
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statuses[400] = "Bad Request";
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statuses[401] = "Unauthorized";
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statuses[403] = "Forbidden";
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statuses[404] = "Not Found";
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statuses[405] = "Method Not Allowed";
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statuses[408] = "Request Timeout";
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statuses[412] = "Precondition Failed";
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statuses[413] = "Request Entity Too Large";
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statuses[414] = "Request-URI Too Large";
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statuses[416] = "Requested Range Not Satisfiable";
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statuses[417] = "Expectation Failed";
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statuses[500] = "Internal Server Error";
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statuses[501] = "Not Implemented";
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statuses[502] = "Bad Gateway";
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statuses[503] = "Service Unavailable";
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statuses[504] = "Gateway Time-out";
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}
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/** A mapping of path suffixes (e.g. file extensions) to their corresponding MIME types. */
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protected static final Map<String, String> contentTypes = new ConcurrentHashMap<String, String>();
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static {
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// add some default common content types
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// see http://www.iana.org/assignments/media-types/ for full list
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addContentType("application/font-woff", "woff");
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addContentType("application/font-woff2", "woff2");
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addContentType("application/java-archive", "jar");
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addContentType("application/javascript", "js");
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addContentType("application/json", "json");
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addContentType("application/octet-stream", "exe");
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addContentType("application/pdf", "pdf");
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addContentType("application/x-7z-compressed", "7z");
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addContentType("application/x-compressed", "tgz");
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addContentType("application/x-gzip", "gz");
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addContentType("application/x-tar", "tar");
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addContentType("application/xhtml+xml", "xhtml");
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addContentType("application/zip", "zip");
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addContentType("audio/mpeg", "mp3");
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addContentType("image/gif", "gif");
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addContentType("image/jpeg", "jpg", "jpeg");
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addContentType("image/png", "png");
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addContentType("image/svg+xml", "svg");
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addContentType("image/x-icon", "ico");
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addContentType("text/css", "css");
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addContentType("text/csv", "csv");
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addContentType("text/html; charset=utf-8", "htm", "html");
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addContentType("text/plain", "txt", "text", "log");
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addContentType("text/xml", "xml");
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}
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/** The MIME types that can be compressed (prefix/suffix wildcards allowed). */
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protected static String[] compressibleContentTypes = {
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"text/*", "*/javascript", "*icon", "*+xml", "*/json"
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};
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/**
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* The {@code LimitedInputStream} provides access to a limited number of consecutive bytes from
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* the underlying InputStream, starting at its current position. If this limit is reached, it
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* behaves as though the end of stream has been reached (although the underlying stream remains
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* open and may contain additional data).
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*/
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public static class LimitedInputStream extends FilterInputStream {
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protected long limit; // decremented when read, until it reaches zero
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protected boolean prematureEndException;
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/**
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* Constructs a LimitedInputStream with the given underlying input stream and limit.
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*
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* @param in the underlying input stream
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* @param limit the maximum number of bytes that may be consumed from the underlying stream
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* before this stream ends. If zero or negative, this stream will be at its end from
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* initialization.
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* @param prematureEndException specifies the stream's behavior when the underlying stream end
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* is reached before the limit is reached: if true, an exception is thrown, otherwise this
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* stream reaches its end as well (i.e. read() returns -1)
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* @throws NullPointerException if the given stream is null
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*/
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public LimitedInputStream(InputStream in, long limit, boolean prematureEndException) {
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super(in);
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if (in == null) throw new NullPointerException("input stream is null");
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this.limit = limit < 0 ? 0 : limit;
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this.prematureEndException = prematureEndException;
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}
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@Override
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public int read() throws IOException {
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int res = limit == 0 ? -1 : in.read();
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if (res < 0 && limit > 0 && prematureEndException)
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throw new IOException("unexpected end of stream");
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limit = res < 0 ? 0 : limit - 1;
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return res;
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}
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@Override
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public int read(byte[] b, int off, int len) throws IOException {
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int res = limit == 0 ? -1 : in.read(b, off, len > limit ? (int) limit : len);
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if (res < 0 && limit > 0 && prematureEndException)
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throw new IOException("unexpected end of stream");
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limit = res < 0 ? 0 : limit - res;
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return res;
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}
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@Override
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public long skip(long len) throws IOException {
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long res = in.skip(len > limit ? limit : len);
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limit -= res;
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return res;
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}
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@Override
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public int available() throws IOException {
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int res = in.available();
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return res > limit ? (int) limit : res;
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}
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@Override
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public boolean markSupported() {
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return false;
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}
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@Override
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public void close() {
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limit = 0; // end this stream, but don't close the underlying stream
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}
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}
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/**
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* The {@code ChunkedInputStream} decodes an InputStream whose data has the "chunked" transfer
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* encoding applied to it, providing the underlying data.
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*/
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public static class ChunkedInputStream extends LimitedInputStream {
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protected Headers headers;
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protected boolean initialized;
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/**
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* Constructs a ChunkedInputStream with the given underlying stream, and a headers container to
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* which the stream's trailing headers will be added.
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*
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* @param in the underlying "chunked"-encoded input stream
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* @param headers the headers container to which the stream's trailing headers will be added, or
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* null if they are to be discarded
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* @throws NullPointerException if the given stream is null
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*/
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public ChunkedInputStream(InputStream in, Headers headers) {
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super(in, 0, true);
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this.headers = headers;
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}
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@Override
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public int read() throws IOException {
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return limit <= 0 && initChunk() < 0 ? -1 : super.read();
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}
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@Override
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public int read(byte[] b, int off, int len) throws IOException {
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return limit <= 0 && initChunk() < 0 ? -1 : super.read(b, off, len);
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}
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/**
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* Initializes the next chunk. If the previous chunk has not yet ended, or the end of stream has
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* been reached, does nothing.
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*
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* @return the length of the chunk, or -1 if the end of stream has been reached
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* @throws IOException if an IO error occurs or the stream is corrupt
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*/
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protected long initChunk() throws IOException {
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if (limit == 0) { // finished previous chunk
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// read chunk-terminating CRLF if it's not the first chunk
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if (initialized && readLine(in).length() > 0)
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throw new IOException("chunk data must end with CRLF");
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initialized = true;
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limit = parseChunkSize(readLine(in)); // read next chunk size
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if (limit == 0) { // last chunk has size 0
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limit = -1; // mark end of stream
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// read trailing headers, if any
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Headers trailingHeaders = readHeaders(in);
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if (headers != null) headers.addAll(trailingHeaders);
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}
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}
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return limit;
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}
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/**
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* Parses a chunk-size line.
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*
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* @param line the chunk-size line to parse
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* @return the chunk size
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* @throws IllegalArgumentException if the chunk-size line is invalid
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*/
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protected static long parseChunkSize(String line) throws IllegalArgumentException {
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int pos = line.indexOf(';');
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line = pos < 0 ? line : line.substring(0, pos); // ignore params, if any
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try {
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return parseULong(line, 16); // throws NFE
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} catch (NumberFormatException nfe) {
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throw new IllegalArgumentException("invalid chunk size line: \"" + line + "\"");
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}
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}
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}
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/**
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* The {@code ChunkedOutputStream} encodes an OutputStream with the "chunked" transfer encoding.
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* It should be used only when the content length is not known in advance, and with the response
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* Transfer-Encoding header set to "chunked".
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*
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* <p>Data is written to the stream by calling the {@link #write(byte[], int, int)} method, which
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* writes a new chunk per invocation. To end the stream, the {@link #writeTrailingChunk} method
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* must be called or the stream closed.
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*/
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public static class ChunkedOutputStream extends FilterOutputStream {
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protected int state; // the current stream state
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/**
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* Constructs a ChunkedOutputStream with the given underlying stream.
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*
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* @param out the underlying output stream to which the chunked stream is written
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* @throws NullPointerException if the given stream is null
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*/
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public ChunkedOutputStream(OutputStream out) {
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super(out);
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if (out == null) throw new NullPointerException("output stream is null");
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}
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/**
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* Initializes a new chunk with the given size.
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*
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* @param size the chunk size (must be positive)
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* @throws IllegalArgumentException if size is negative
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* @throws IOException if an IO error occurs, or the stream has already been ended
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*/
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protected void initChunk(long size) throws IOException {
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if (size < 0) throw new IllegalArgumentException("invalid size: " + size);
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if (state > 0) out.write(CRLF); // end previous chunk
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else if (state == 0) state = 1; // start first chunk
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else throw new IOException("chunked stream has already ended");
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out.write(getBytes(Long.toHexString(size)));
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out.write(CRLF);
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}
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/**
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* Writes the trailing chunk which marks the end of the stream.
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*
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* @param headers the (optional) trailing headers to write, or null
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* @throws IOException if an error occurs
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*/
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public void writeTrailingChunk(Headers headers) throws IOException {
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initChunk(0); // zero-sized chunk marks the end of the stream
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if (headers == null) out.write(CRLF); // empty header block
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else headers.writeTo(out);
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state = -1;
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}
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/**
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* Writes a chunk containing the given byte. This method initializes a new chunk of size 1, and
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* then writes the byte as the chunk data.
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*
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* @param b the byte to write as a chunk
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* @throws IOException if an error occurs
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*/
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@Override
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public void write(int b) throws IOException {
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write(new byte[] {(byte) b}, 0, 1);
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}
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/**
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* Writes a chunk containing the given bytes. This method initializes a new chunk of the given
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* size, and then writes the chunk data.
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*
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* @param b an array containing the bytes to write
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* @param off the offset within the array where the data starts
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* @param len the length of the data in bytes
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* @throws IOException if an error occurs
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* @throws IndexOutOfBoundsException if the given offset or length are outside the bounds of the
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* given array
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*/
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@Override
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public void write(byte[] b, int off, int len) throws IOException {
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if (len > 0) // zero-sized chunk is the trailing chunk
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initChunk(len);
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out.write(b, off, len);
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}
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/**
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* Writes the trailing chunk if necessary, and closes the underlying stream.
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*
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* @throws IOException if an error occurs
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*/
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@Override
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public void close() throws IOException {
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if (state > -1) writeTrailingChunk(null);
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super.close();
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}
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}
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/**
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* The {@code MultipartInputStream} decodes an InputStream whose data has a "multipart/*" content
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* type (see RFC 2046), providing the underlying data of its various parts.
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*
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* <p>The {@code InputStream} methods (e.g. {@link #read}) relate only to the current part, and
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* the {@link #nextPart} method advances to the beginning of the next part.
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*/
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public static class MultipartInputStream extends FilterInputStream {
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protected final byte[] boundary; // including leading CRLF--
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protected final byte[] buf = new byte[4096];
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protected int head, tail; // indices of current part's data in buf
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protected int end; // last index of input data read into buf
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protected int len; // length of found boundary
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protected int state; // initial, started data, start boundary, EOS, last boundary, epilogue
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/**
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* Constructs a MultipartInputStream with the given underlying stream.
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|
*
|
|
* @param in the underlying multipart stream
|
|
* @param boundary the multipart boundary
|
|
* @throws NullPointerException if the given stream or boundary is null
|
|
* @throws IllegalArgumentException if the given boundary's size is not between 1 and 70
|
|
*/
|
|
protected MultipartInputStream(InputStream in, byte[] boundary) {
|
|
super(in);
|
|
int len = boundary.length;
|
|
if (len == 0 || len > 70) throw new IllegalArgumentException("invalid boundary length");
|
|
this.boundary = new byte[len + 4]; // CRLF--boundary
|
|
System.arraycopy(CRLF, 0, this.boundary, 0, 2);
|
|
this.boundary[2] = this.boundary[3] = '-';
|
|
System.arraycopy(boundary, 0, this.boundary, 4, len);
|
|
}
|
|
|
|
@Override
|
|
public int read() throws IOException {
|
|
if (!fill()) return -1;
|
|
return buf[head++] & 0xFF;
|
|
}
|
|
|
|
@Override
|
|
public int read(byte[] b, int off, int len) throws IOException {
|
|
if (!fill()) return -1;
|
|
len = Math.min(tail - head, len);
|
|
System.arraycopy(buf, head, b, off, len); // throws IOOBE as necessary
|
|
head += len;
|
|
return len;
|
|
}
|
|
|
|
@Override
|
|
public long skip(long len) throws IOException {
|
|
if (len <= 0 || !fill()) return 0;
|
|
len = Math.min(tail - head, len);
|
|
head += len;
|
|
return len;
|
|
}
|
|
|
|
@Override
|
|
public int available() throws IOException {
|
|
return tail - head;
|
|
}
|
|
|
|
@Override
|
|
public boolean markSupported() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Advances the stream position to the beginning of the next part. Data read before calling this
|
|
* method for the first time is the preamble, and data read after this method returns false is
|
|
* the epilogue.
|
|
*
|
|
* @return true if successful, or false if there are no more parts
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public boolean nextPart() throws IOException {
|
|
while (skip(buf.length) != 0) ; // skip current part (until boundary)
|
|
head = tail += len; // the next part starts right after boundary
|
|
state |= 1; // started data (after first boundary)
|
|
if (state >= 8) { // found last boundary
|
|
state |= 0x10; // now beyond last boundary (epilogue)
|
|
return false;
|
|
}
|
|
findBoundary(); // update indices
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Fills the buffer with more data from the underlying stream.
|
|
*
|
|
* @return true if there is available data for the current part, or false if the current part's
|
|
* end has been reached
|
|
* @throws IOException if an error occurs or the input format is invalid
|
|
*/
|
|
protected boolean fill() throws IOException {
|
|
// check if we already have more available data
|
|
if (head != tail) // remember that if we continue, head == tail below
|
|
return true;
|
|
// if there's no more room, shift extra unread data to beginning of buffer
|
|
if (tail > buf.length - 256) { // max boundary + whitespace supported size
|
|
System.arraycopy(buf, tail, buf, 0, end -= tail);
|
|
head = tail = 0;
|
|
}
|
|
// read more data and look for boundary (or potential partial boundary)
|
|
int read;
|
|
do {
|
|
read = super.read(buf, end, buf.length - end);
|
|
if (read < 0) state |= 4; // end of stream (EOS)
|
|
else end += read;
|
|
findBoundary(); // updates tail and length to next potential boundary
|
|
// if we found a partial boundary with no data before it, we must
|
|
// continue reading to determine if there is more data or not
|
|
} while (read > 0 && tail == head && len == 0);
|
|
// update and validate state
|
|
if (tail != 0) // anything but a boundary right at the beginning
|
|
state |= 1; // started data (preamble or after boundary)
|
|
if (state < 8 && len > 0) state |= 2; // found start boundary
|
|
if ((state & 6) == 4 // EOS but no start boundary found
|
|
|| len == 0
|
|
&& ((state & 0xFC) == 4 // EOS but no last and no more boundaries
|
|
|| read == 0 && tail == head)) // boundary longer than buffer
|
|
throw new IOException("missing boundary");
|
|
if (state >= 0x10) // in epilogue
|
|
tail = end; // ignore boundaries, return everything
|
|
return tail > head; // available data in current part
|
|
}
|
|
|
|
/**
|
|
* Finds the first (potential) boundary within the buffer's remaining data. Updates tail, length
|
|
* and state fields accordingly.
|
|
*
|
|
* @throws IOException if an error occurs or the input format is invalid
|
|
*/
|
|
protected void findBoundary() throws IOException {
|
|
// see RFC2046#5.1.1 for boundary syntax
|
|
len = 0;
|
|
int off = tail - ((state & 1) != 0 || buf[0] != '-' ? 0 : 2); // skip initial CRLF?
|
|
for (int end = this.end; tail < end; tail++, off = tail) {
|
|
int j = tail; // end of potential boundary
|
|
// try to match boundary value (leading CRLF is optional at first boundary)
|
|
while (j < end && j - off < boundary.length && buf[j] == boundary[j - off]) j++;
|
|
// return potential partial boundary which is cut off at end of current data
|
|
if (j + 1 >= end) // at least two more chars needed for full boundary (CRLF or --)
|
|
return;
|
|
// if we found the boundary value, expand selection to include full line
|
|
if (j - off == boundary.length) {
|
|
// check if last boundary of entire multipart
|
|
if (buf[j] == '-' && buf[j + 1] == '-') {
|
|
j += 2;
|
|
state |= 8; // found last boundary that ends multipart
|
|
}
|
|
// allow linear whitespace after boundary
|
|
while (j < end && (buf[j] == ' ' || buf[j] == '\t')) j++;
|
|
// check for CRLF (required, except in last boundary with no epilogue)
|
|
if (j + 1 < end && buf[j] == '\r' && buf[j + 1] == '\n') // found CRLF
|
|
len = j - tail + 2; // including optional whitespace and CRLF
|
|
else if (j + 1 < end
|
|
|| (state & 4) != 0 && j + 1 == end) // should have found or never will
|
|
throw new IOException("boundary must end with CRLF");
|
|
else if ((state & 4) != 0) // last boundary with no CRLF at end of data is valid
|
|
len = j - tail;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* The {@code MultipartIterator} iterates over the parts of a multipart/form-data request.
|
|
*
|
|
* <p>For example, to support file upload from a web browser:
|
|
*
|
|
* <ol>
|
|
* <li>Create an HTML form which includes an input field of type "file", attributes
|
|
* method="post" and enctype="multipart/form-data", and an action URL of your choice, for
|
|
* example action="/upload". This form can be served normally like any other resource, e.g.
|
|
* from an HTML file on disk.
|
|
* <li>Add a context handler for the action path ("/upload" in this example), using either the
|
|
* explicit {@link VirtualHost#addContext} method or the {@link Context} annotation.
|
|
* <li>In the context handler implementation, construct a {@code MultipartIterator} from the
|
|
* client {@code Request}.
|
|
* <li>Iterate over the form {@link Part}s, processing each named field as appropriate - for the
|
|
* file input field, read the uploaded file using the body input stream.
|
|
* </ol>
|
|
*/
|
|
public static class MultipartIterator implements Iterator<MultipartIterator.Part> {
|
|
|
|
/** The {@code Part} class encapsulates a single part of the multipart. */
|
|
public static class Part {
|
|
|
|
public String name;
|
|
public String filename;
|
|
public Headers headers;
|
|
public InputStream body;
|
|
|
|
/**
|
|
* Returns the part's name (form field name).
|
|
*
|
|
* @return the part's name
|
|
*/
|
|
public String getName() {
|
|
return name;
|
|
}
|
|
|
|
/**
|
|
* Returns the part's filename (original filename entered in file form field).
|
|
*
|
|
* @return the part's filename, or null if there is none
|
|
*/
|
|
public String getFilename() {
|
|
return filename;
|
|
}
|
|
|
|
/**
|
|
* Returns the part's headers.
|
|
*
|
|
* @return the part's headers
|
|
*/
|
|
public Headers getHeaders() {
|
|
return headers;
|
|
}
|
|
|
|
/**
|
|
* Returns the part's body (form field value).
|
|
*
|
|
* @return the part's body
|
|
*/
|
|
public InputStream getBody() {
|
|
return body;
|
|
}
|
|
|
|
/**
|
|
* * Returns the part's body as a string. If the part headers do not specify a charset, UTF-8
|
|
* is used.
|
|
*
|
|
* @return the part's body as a string
|
|
* @throws IOException if an IO error occurs
|
|
*/
|
|
public String getString() throws IOException {
|
|
String charset = headers.getParams("Content-Type").get("charset");
|
|
return readToken(body, -1, charset == null ? "UTF-8" : charset, 8192);
|
|
}
|
|
}
|
|
|
|
protected final MultipartInputStream in;
|
|
protected boolean next;
|
|
|
|
/**
|
|
* Creates a new MultipartIterator from the given request.
|
|
*
|
|
* @param req the multipart/form-data request
|
|
* @throws IOException if an IO error occurs
|
|
* @throws IllegalArgumentException if the given request's content type is not
|
|
* multipart/form-data, or is missing the boundary
|
|
*/
|
|
public MultipartIterator(Request req) throws IOException {
|
|
Map<String, String> ct = req.getHeaders().getParams("Content-Type");
|
|
if (!ct.containsKey("multipart/form-data"))
|
|
throw new IllegalArgumentException("Content-Type is not multipart/form-data");
|
|
String boundary = ct.get("boundary"); // should be US-ASCII
|
|
if (boundary == null) throw new IllegalArgumentException("Content-Type is missing boundary");
|
|
in = new MultipartInputStream(req.getBody(), getBytes(boundary));
|
|
}
|
|
|
|
public boolean hasNext() {
|
|
try {
|
|
return next || (next = in.nextPart());
|
|
} catch (IOException ioe) {
|
|
throw new RuntimeException(ioe);
|
|
}
|
|
}
|
|
|
|
public Part next() {
|
|
if (!hasNext()) throw new NoSuchElementException();
|
|
next = false;
|
|
Part p = new Part();
|
|
try {
|
|
p.headers = readHeaders(in);
|
|
} catch (IOException ioe) {
|
|
throw new RuntimeException(ioe);
|
|
}
|
|
Map<String, String> cd = p.headers.getParams("Content-Disposition");
|
|
p.name = cd.get("name");
|
|
p.filename = cd.get("filename");
|
|
p.body = in;
|
|
return p;
|
|
}
|
|
|
|
public void remove() {
|
|
throw new UnsupportedOperationException();
|
|
}
|
|
}
|
|
|
|
/** The {@code VirtualHost} class represents a virtual host in the server. */
|
|
public static class VirtualHost {
|
|
|
|
public static final String DEFAULT_HOST_NAME = "~DEFAULT~";
|
|
|
|
/** The {@code ContextInfo} class holds a single context's information. */
|
|
public class ContextInfo {
|
|
|
|
protected final String path;
|
|
protected final Map<String, ContextHandler> handlers =
|
|
new ConcurrentHashMap<String, ContextHandler>(2);
|
|
|
|
/**
|
|
* Constructs a ContextInfo with the given context path.
|
|
*
|
|
* @param path the context path (without trailing slash)
|
|
*/
|
|
public ContextInfo(String path) {
|
|
this.path = path;
|
|
}
|
|
|
|
/**
|
|
* Returns the context path.
|
|
*
|
|
* @return the context path, or null if there is none
|
|
*/
|
|
public String getPath() {
|
|
return path;
|
|
}
|
|
|
|
/**
|
|
* Returns the map of supported HTTP methods and their corresponding handlers.
|
|
*
|
|
* @return the map of supported HTTP methods and their corresponding handlers
|
|
*/
|
|
public Map<String, ContextHandler> getHandlers() {
|
|
return handlers;
|
|
}
|
|
|
|
/**
|
|
* Adds (or replaces) a context handler for the given HTTP methods.
|
|
*
|
|
* @param handler the context handler
|
|
* @param methods the HTTP methods supported by the handler (default is "GET")
|
|
*/
|
|
public void addHandler(ContextHandler handler, String... methods) {
|
|
if (methods.length == 0) methods = new String[] {"GET"};
|
|
for (String method : methods) {
|
|
handlers.put(method, handler);
|
|
VirtualHost.this.methods.add(method); // it's now supported by server
|
|
}
|
|
}
|
|
}
|
|
|
|
protected final String name;
|
|
protected final Set<String> aliases = new CopyOnWriteArraySet<String>();
|
|
protected volatile String directoryIndex = "index.html";
|
|
protected volatile boolean allowGeneratedIndex;
|
|
protected final Set<String> methods = new CopyOnWriteArraySet<String>();
|
|
protected final ContextInfo emptyContext = new ContextInfo(null);
|
|
protected final ConcurrentMap<String, ContextInfo> contexts =
|
|
new ConcurrentHashMap<String, ContextInfo>();
|
|
|
|
/**
|
|
* Constructs a VirtualHost with the given name.
|
|
*
|
|
* @param name the host's name, or null if it is the default host
|
|
*/
|
|
public VirtualHost(String name) {
|
|
this.name = name;
|
|
contexts.put("*", new ContextInfo(null)); // for "OPTIONS *"
|
|
}
|
|
|
|
/**
|
|
* Returns this host's name.
|
|
*
|
|
* @return this host's name, or null if it is the default host
|
|
*/
|
|
public String getName() {
|
|
return name;
|
|
}
|
|
|
|
/**
|
|
* Adds an alias for this host.
|
|
*
|
|
* @param alias the alias
|
|
*/
|
|
public void addAlias(String alias) {
|
|
aliases.add(alias);
|
|
}
|
|
|
|
/**
|
|
* Returns this host's aliases.
|
|
*
|
|
* @return the (unmodifiable) set of aliases (which may be empty)
|
|
*/
|
|
public Set<String> getAliases() {
|
|
return Collections.unmodifiableSet(aliases);
|
|
}
|
|
|
|
/**
|
|
* Sets the directory index file. For every request whose URI ends with a '/' (i.e. a
|
|
* directory), the index file is appended to the path, and the resulting resource is served if
|
|
* it exists. If it does not exist, an auto-generated index for the requested directory may be
|
|
* served, depending on whether {@link #setAllowGeneratedIndex a generated index is allowed},
|
|
* otherwise an error is returned. The default directory index file is "index.html".
|
|
*
|
|
* @param directoryIndex the directory index file, or null if no index file should be used
|
|
*/
|
|
public void setDirectoryIndex(String directoryIndex) {
|
|
this.directoryIndex = directoryIndex;
|
|
}
|
|
|
|
/**
|
|
* Gets this host's directory index file.
|
|
*
|
|
* @return the directory index file, or null
|
|
*/
|
|
public String getDirectoryIndex() {
|
|
return directoryIndex;
|
|
}
|
|
|
|
/**
|
|
* Sets whether auto-generated indices are allowed. If false, and a directory resource is
|
|
* requested, an error will be returned instead.
|
|
*
|
|
* @param allowed specifies whether generated indices are allowed
|
|
*/
|
|
public void setAllowGeneratedIndex(boolean allowed) {
|
|
this.allowGeneratedIndex = allowed;
|
|
}
|
|
|
|
/**
|
|
* Returns whether auto-generated indices are allowed.
|
|
*
|
|
* @return whether auto-generated indices are allowed
|
|
*/
|
|
public boolean isAllowGeneratedIndex() {
|
|
return allowGeneratedIndex;
|
|
}
|
|
|
|
/**
|
|
* Returns all HTTP methods explicitly supported by at least one context (this may or may not
|
|
* include the methods with required or built-in support).
|
|
*
|
|
* @return all HTTP methods explicitly supported by at least one context
|
|
*/
|
|
public Set<String> getMethods() {
|
|
return methods;
|
|
}
|
|
|
|
/**
|
|
* Returns the context handler for the given path.
|
|
*
|
|
* <p>If a context is not found for the given path, the search is repeated for its parent path,
|
|
* and so on until a base context is found. If neither the given path nor any of its parents has
|
|
* a context, an empty context is returned.
|
|
*
|
|
* @param path the context's path
|
|
* @return the context info for the given path, or an empty context if none exists
|
|
*/
|
|
public ContextInfo getContext(String path) {
|
|
// all context paths are without trailing slash
|
|
for (path = trimRight(path, '/'); path != null; path = getParentPath(path)) {
|
|
ContextInfo info = contexts.get(path);
|
|
if (info != null) return info;
|
|
}
|
|
return emptyContext;
|
|
}
|
|
|
|
/**
|
|
* Adds a context and its corresponding context handler to this server. Paths are normalized by
|
|
* removing trailing slashes (except the root).
|
|
*
|
|
* @param path the context's path (must start with '/')
|
|
* @param handler the context handler for the given path
|
|
* @param methods the HTTP methods supported by the context handler (default is "GET")
|
|
* @throws IllegalArgumentException if path is malformed
|
|
*/
|
|
public void addContext(String path, ContextHandler handler, String... methods) {
|
|
if (path == null || !path.startsWith("/") && !path.equals("*"))
|
|
throw new IllegalArgumentException("invalid path: " + path);
|
|
path = trimRight(path, '/'); // remove trailing slash
|
|
ContextInfo info = new ContextInfo(path);
|
|
ContextInfo existing = contexts.putIfAbsent(path, info);
|
|
info = existing != null ? existing : info;
|
|
info.addHandler(handler, methods);
|
|
}
|
|
|
|
/**
|
|
* Adds contexts for all methods of the given object that are annotated with the {@link Context}
|
|
* annotation.
|
|
*
|
|
* @param o the object whose annotated methods are added
|
|
* @throws IllegalArgumentException if a Context-annotated method has an {@link Context invalid
|
|
* signature}
|
|
*/
|
|
public void addContexts(Object o) throws IllegalArgumentException {
|
|
for (Class<?> c = o.getClass(); c != null; c = c.getSuperclass()) {
|
|
// add to contexts those with @Context annotation
|
|
for (Method m : c.getDeclaredMethods()) {
|
|
Context context = m.getAnnotation(Context.class);
|
|
if (context != null) {
|
|
m.setAccessible(true); // allow access to private method
|
|
ContextHandler handler = new MethodContextHandler(m, o);
|
|
addContext(context.value(), handler, context.methods());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* The {@code Context} annotation decorates methods which are mapped to a context (path) within
|
|
* the server, and provide its contents.
|
|
*
|
|
* <p>The annotated methods must have the same signature and contract as {@link
|
|
* ContextHandler#serve}, but can have arbitrary names.
|
|
*
|
|
* @see VirtualHost#addContexts(Object)
|
|
*/
|
|
@Retention(RetentionPolicy.RUNTIME)
|
|
@Target(ElementType.METHOD)
|
|
public @interface Context {
|
|
|
|
/**
|
|
* The context (path) that this field maps to (must begin with '/').
|
|
*
|
|
* @return the context (path) that this field maps to
|
|
*/
|
|
String value();
|
|
|
|
/**
|
|
* The HTTP methods supported by this context handler (default is "GET").
|
|
*
|
|
* @return the HTTP methods supported by this context handler
|
|
*/
|
|
String[] methods() default "GET";
|
|
}
|
|
|
|
/**
|
|
* A {@code ContextHandler} serves the content of resources within a context.
|
|
*
|
|
* @see VirtualHost#addContext
|
|
*/
|
|
public interface ContextHandler {
|
|
|
|
/**
|
|
* Serves the given request using the given response.
|
|
*
|
|
* @param req the request to be served
|
|
* @param resp the response to be filled
|
|
* @return an HTTP status code, which will be used in returning a default response appropriate
|
|
* for this status. If this method invocation already sent anything in the response (headers
|
|
* or content), it must return 0, and no further processing will be done
|
|
* @throws IOException if an IO error occurs
|
|
*/
|
|
int serve(Request req, Response resp) throws IOException;
|
|
}
|
|
|
|
/**
|
|
* The {@code FileContextHandler} services a context by mapping it to a file or folder
|
|
* (recursively) on disk.
|
|
*/
|
|
public static class FileContextHandler implements ContextHandler {
|
|
|
|
protected final File base;
|
|
|
|
public FileContextHandler(File dir) throws IOException {
|
|
this.base = dir.getCanonicalFile();
|
|
}
|
|
|
|
public int serve(Request req, Response resp) throws IOException {
|
|
return serveFile(base, req.getContext().getPath(), req, resp);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* The {@code MethodContextHandler} services a context by invoking a handler method on a specified
|
|
* object.
|
|
*
|
|
* <p>The method must have the same signature and contract as {@link ContextHandler#serve}, but
|
|
* can have an arbitrary name.
|
|
*
|
|
* @see VirtualHost#addContexts(Object)
|
|
*/
|
|
public static class MethodContextHandler implements ContextHandler {
|
|
|
|
protected final Method m;
|
|
protected final Object obj;
|
|
|
|
public MethodContextHandler(Method m, Object obj) throws IllegalArgumentException {
|
|
this.m = m;
|
|
this.obj = obj;
|
|
Class<?>[] params = m.getParameterTypes();
|
|
if (params.length != 2
|
|
|| !Request.class.isAssignableFrom(params[0])
|
|
|| !Response.class.isAssignableFrom(params[1])
|
|
|| !int.class.isAssignableFrom(m.getReturnType()))
|
|
throw new IllegalArgumentException("invalid method signature: " + m);
|
|
}
|
|
|
|
public int serve(Request req, Response resp) throws IOException {
|
|
try {
|
|
return (Integer) m.invoke(obj, req, resp);
|
|
} catch (InvocationTargetException ite) {
|
|
throw new IOException("error: " + ite.getCause().getMessage());
|
|
} catch (Exception e) {
|
|
throw new IOException("error: " + e);
|
|
}
|
|
}
|
|
}
|
|
|
|
/** The {@code Header} class encapsulates a single HTTP header. */
|
|
public static class Header {
|
|
|
|
protected final String name;
|
|
protected final String value;
|
|
|
|
/**
|
|
* Constructs a header with the given name and value. Leading and trailing whitespace are
|
|
* trimmed.
|
|
*
|
|
* @param name the header name
|
|
* @param value the header value
|
|
* @throws NullPointerException if name or value is null
|
|
* @throws IllegalArgumentException if name is empty
|
|
*/
|
|
public Header(String name, String value) {
|
|
this.name = name.trim();
|
|
this.value = value.trim();
|
|
// RFC2616#14.23 - header can have an empty value (e.g. Host)
|
|
if (this.name.length() == 0) // but name cannot be empty
|
|
throw new IllegalArgumentException("name cannot be empty");
|
|
}
|
|
|
|
/**
|
|
* Returns this header's name.
|
|
*
|
|
* @return this header's name
|
|
*/
|
|
public String getName() {
|
|
return name;
|
|
}
|
|
|
|
/**
|
|
* Returns this header's value.
|
|
*
|
|
* @return this header's value
|
|
*/
|
|
public String getValue() {
|
|
return value;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* The {@code Headers} class encapsulates a collection of HTTP headers.
|
|
*
|
|
* <p>Header names are treated case-insensitively, although this class retains their original
|
|
* case. Header insertion order is maintained as well.
|
|
*/
|
|
public static class Headers implements Iterable<Header> {
|
|
|
|
// due to the requirements of case-insensitive name comparisons,
|
|
// retaining the original case, and retaining header insertion order,
|
|
// and due to the fact that the number of headers is generally
|
|
// quite small (usually under 12 headers), we use a simple array with
|
|
// linear access times, which proves to be more efficient and
|
|
// straightforward than the alternatives
|
|
protected Header[] headers = new Header[12];
|
|
protected int count;
|
|
|
|
/**
|
|
* Returns the number of added headers.
|
|
*
|
|
* @return the number of added headers
|
|
*/
|
|
public int size() {
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* Returns the value of the first header with the given name.
|
|
*
|
|
* @param name the header name (case insensitive)
|
|
* @return the header value, or null if none exists
|
|
*/
|
|
public String get(String name) {
|
|
for (int i = 0; i < count; i++)
|
|
if (headers[i].getName().equalsIgnoreCase(name)) return headers[i].getValue();
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Returns the Date value of the header with the given name.
|
|
*
|
|
* @param name the header name (case insensitive)
|
|
* @return the header value as a Date, or null if none exists or if the value is not in any
|
|
* supported date format
|
|
*/
|
|
public Date getDate(String name) {
|
|
try {
|
|
String header = get(name);
|
|
return header == null ? null : parseDate(header);
|
|
} catch (IllegalArgumentException iae) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns whether there exists a header with the given name.
|
|
*
|
|
* @param name the header name (case insensitive)
|
|
* @return whether there exists a header with the given name
|
|
*/
|
|
public boolean contains(String name) {
|
|
return get(name) != null;
|
|
}
|
|
|
|
/**
|
|
* Adds a header with the given name and value to the end of this collection of headers. Leading
|
|
* and trailing whitespace are trimmed.
|
|
*
|
|
* @param name the header name (case insensitive)
|
|
* @param value the header value
|
|
*/
|
|
public void add(String name, String value) {
|
|
Header header = new Header(name, value); // also validates
|
|
// expand array if necessary
|
|
if (count == headers.length) {
|
|
Header[] expanded = new Header[2 * count];
|
|
System.arraycopy(headers, 0, expanded, 0, count);
|
|
headers = expanded;
|
|
}
|
|
headers[count++] = header; // inlining header would cause a bug!
|
|
}
|
|
|
|
/**
|
|
* Adds all given headers to the end of this collection of headers, in their original order.
|
|
*
|
|
* @param headers the headers to add
|
|
*/
|
|
public void addAll(Headers headers) {
|
|
for (Header header : headers) add(header.getName(), header.getValue());
|
|
}
|
|
|
|
/**
|
|
* Adds a header with the given name and value, replacing the first existing header with the
|
|
* same name. If there is no existing header with the same name, it is added as in {@link #add}.
|
|
*
|
|
* @param name the header name (case insensitive)
|
|
* @param value the header value
|
|
* @return the replaced header, or null if none existed
|
|
*/
|
|
public Header replace(String name, String value) {
|
|
for (int i = 0; i < count; i++) {
|
|
if (headers[i].getName().equalsIgnoreCase(name)) {
|
|
Header prev = headers[i];
|
|
headers[i] = new Header(name, value);
|
|
return prev;
|
|
}
|
|
}
|
|
add(name, value);
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Removes all headers with the given name (if any exist).
|
|
*
|
|
* @param name the header name (case insensitive)
|
|
*/
|
|
public void remove(String name) {
|
|
int j = 0;
|
|
for (int i = 0; i < count; i++)
|
|
if (!headers[i].getName().equalsIgnoreCase(name)) headers[j++] = headers[i];
|
|
while (count > j) headers[--count] = null;
|
|
}
|
|
|
|
/**
|
|
* Writes the headers to the given stream (including trailing CRLF).
|
|
*
|
|
* @param out the stream to write the headers to
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public void writeTo(OutputStream out) throws IOException {
|
|
for (int i = 0; i < count; i++) {
|
|
out.write(getBytes(headers[i].getName(), ": ", headers[i].getValue()));
|
|
out.write(CRLF);
|
|
}
|
|
out.write(CRLF); // ends header block
|
|
}
|
|
|
|
/**
|
|
* Returns a header's parameters. Parameter order is maintained, and the first key (in iteration
|
|
* order) is the header's value without the parameters.
|
|
*
|
|
* @param name the header name (case insensitive)
|
|
* @return the header's parameter names and values
|
|
*/
|
|
public Map<String, String> getParams(String name) {
|
|
Map<String, String> params = new LinkedHashMap<String, String>();
|
|
for (String param : split(get(name), ";", -1)) {
|
|
String[] pair = split(param, "=", 2);
|
|
String val = pair.length == 1 ? "" : trimLeft(trimRight(pair[1], '"'), '"');
|
|
params.put(pair[0], val);
|
|
}
|
|
return params;
|
|
}
|
|
|
|
/**
|
|
* Returns an iterator over the headers, in their insertion order. If the headers collection is
|
|
* modified during iteration, the iteration result is undefined. The remove operation is
|
|
* unsupported.
|
|
*
|
|
* @return an Iterator over the headers
|
|
*/
|
|
public Iterator<Header> iterator() {
|
|
// we use the built-in wrapper instead of a trivial custom implementation
|
|
// since even a tiny anonymous class here compiles to a 1.5K class file
|
|
return Arrays.asList(headers).subList(0, count).iterator();
|
|
}
|
|
}
|
|
|
|
/** The {@code Request} class encapsulates a single HTTP request. */
|
|
public class Request {
|
|
|
|
protected String method;
|
|
protected URI uri;
|
|
protected URL baseURL; // cached value
|
|
protected String version;
|
|
protected Headers headers;
|
|
protected InputStream body;
|
|
protected Map<String, String> params; // cached value
|
|
protected VirtualHost host; // cached value
|
|
protected VirtualHost.ContextInfo context; // cached value
|
|
|
|
/**
|
|
* Constructs a Request from the data in the given input stream.
|
|
*
|
|
* @param in the input stream from which the request is read
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public Request(InputStream in) throws IOException {
|
|
readRequestLine(in);
|
|
headers = readHeaders(in);
|
|
// RFC2616#3.6 - if "chunked" is used, it must be the last one
|
|
// RFC2616#4.4 - if non-identity Transfer-Encoding is present,
|
|
// it must either include "chunked" or close the connection after
|
|
// the body, and in any case ignore Content-Length.
|
|
// if there is no such Transfer-Encoding, use Content-Length
|
|
// if neither header exists, there is no body
|
|
String header = headers.get("Transfer-Encoding");
|
|
if (header != null && !header.toLowerCase(Locale.US).equals("identity")) {
|
|
if (Arrays.asList(splitElements(header, true)).contains("chunked"))
|
|
body = new ChunkedInputStream(in, headers);
|
|
else body = in; // body ends when connection closes
|
|
} else {
|
|
header = headers.get("Content-Length");
|
|
long len = header == null ? 0 : parseULong(header, 10);
|
|
body = new LimitedInputStream(in, len, false);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the request method.
|
|
*
|
|
* @return the request method
|
|
*/
|
|
public String getMethod() {
|
|
return method;
|
|
}
|
|
|
|
/**
|
|
* Returns the request URI.
|
|
*
|
|
* @return the request URI
|
|
*/
|
|
public URI getURI() {
|
|
return uri;
|
|
}
|
|
|
|
/**
|
|
* Returns the request version string.
|
|
*
|
|
* @return the request version string
|
|
*/
|
|
public String getVersion() {
|
|
return version;
|
|
}
|
|
|
|
/**
|
|
* Returns the request headers.
|
|
*
|
|
* @return the request headers
|
|
*/
|
|
public Headers getHeaders() {
|
|
return headers;
|
|
}
|
|
|
|
/**
|
|
* Returns the input stream containing the request body.
|
|
*
|
|
* @return the input stream containing the request body
|
|
*/
|
|
public InputStream getBody() {
|
|
return body;
|
|
}
|
|
|
|
/** Returns the body in a String format */
|
|
public String getJson() {
|
|
try (final java.util.Scanner s = new java.util.Scanner(body).useDelimiter("\\A")) {
|
|
final String result = s.hasNext() ? s.next() : "";
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the path component of the request URI, after URL decoding has been applied (using the
|
|
* UTF-8 charset).
|
|
*
|
|
* @return the decoded path component of the request URI
|
|
*/
|
|
public String getPath() {
|
|
return uri.getPath();
|
|
}
|
|
|
|
/**
|
|
* Sets the path component of the request URI. This can be useful in URL rewriting, etc.
|
|
*
|
|
* @param path the path to set
|
|
* @throws IllegalArgumentException if the given path is malformed
|
|
*/
|
|
public void setPath(String path) {
|
|
try {
|
|
uri = new URI(uri.getScheme(), uri.getHost(), trimDuplicates(path, '/'), uri.getFragment());
|
|
context = null; // clear cached context so it will be recalculated
|
|
} catch (URISyntaxException use) {
|
|
throw new IllegalArgumentException("error setting path", use);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the base URL (scheme, host and port) of the request resource. The host name is taken
|
|
* from the request URI or the Host header or a default host (see RFC2616#5.2).
|
|
*
|
|
* @return the base URL of the requested resource, or null if it is malformed
|
|
*/
|
|
public URL getBaseURL() {
|
|
if (baseURL != null) return baseURL;
|
|
// normalize host header
|
|
String host = uri.getHost();
|
|
if (host == null) {
|
|
host = headers.get("Host");
|
|
if (host == null) // missing in HTTP/1.0
|
|
host = detectLocalHostName();
|
|
}
|
|
int pos = host.indexOf(':');
|
|
host = pos < 0 ? host : host.substring(0, pos);
|
|
try {
|
|
return baseURL = new URL(secure ? "https" : "http", host, port, "");
|
|
} catch (MalformedURLException mue) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the request parameters, which are parsed both from the query part of the request URI,
|
|
* and from the request body if its content type is "application/x-www-form-urlencoded" (i.e. a
|
|
* submitted form). UTF-8 encoding is assumed in both cases.
|
|
*
|
|
* <p>The parameters are returned as a list of string arrays, each containing the parameter name
|
|
* as the first element and its corresponding value as the second element (or an empty string if
|
|
* there is no value).
|
|
*
|
|
* <p>The list retains the original order of the parameters.
|
|
*
|
|
* @return the request parameters name-value pairs, or an empty list if there are none
|
|
* @throws IOException if an error occurs
|
|
* @see HTTPServer#parseParamsList(String)
|
|
*/
|
|
public List<String[]> getParamsList() throws IOException {
|
|
List<String[]> queryParams = parseParamsList(uri.getRawQuery());
|
|
List<String[]> bodyParams = Collections.emptyList();
|
|
String ct = headers.get("Content-Type");
|
|
if (ct != null && ct.toLowerCase(Locale.US).startsWith("application/x-www-form-urlencoded"))
|
|
bodyParams = parseParamsList(readToken(body, -1, "UTF-8", 2097152)); // 2MB limit
|
|
if (bodyParams.isEmpty()) return queryParams;
|
|
if (queryParams.isEmpty()) return bodyParams;
|
|
queryParams.addAll(bodyParams);
|
|
return queryParams;
|
|
}
|
|
|
|
/**
|
|
* Returns the request parameters, which are parsed both from the query part of the request URI,
|
|
* and from the request body if its content type is "application/x-www-form-urlencoded" (i.e. a
|
|
* submitted form). UTF-8 encoding is assumed in both cases.
|
|
*
|
|
* <p>For multivalued parameters (i.e. multiple parameters with the same name), only the first
|
|
* one is considered. For access to all values, use {@link #getParamsList()} instead.
|
|
*
|
|
* <p>The map iteration retains the original order of the parameters.
|
|
*
|
|
* @return the request parameters name-value pairs, or an empty map if there are none
|
|
* @throws IOException if an error occurs
|
|
* @see #getParamsList()
|
|
*/
|
|
public Map<String, String> getParams() throws IOException {
|
|
if (params == null) params = toMap(getParamsList());
|
|
return params;
|
|
}
|
|
|
|
/**
|
|
* Returns the absolute (zero-based) content range value read from the Range header. If multiple
|
|
* ranges are requested, a single range containing all of them is returned.
|
|
*
|
|
* @param length the full length of the requested resource
|
|
* @return the requested range, or null if the Range header is missing or invalid
|
|
*/
|
|
public long[] getRange(long length) {
|
|
String header = headers.get("Range");
|
|
return header == null || !header.startsWith("bytes=")
|
|
? null
|
|
: parseRange(header.substring(6), length);
|
|
}
|
|
|
|
/**
|
|
* Reads the request line, parsing the method, URI and version string.
|
|
*
|
|
* @param in the input stream from which the request line is read
|
|
* @throws IOException if an error occurs or the request line is invalid
|
|
*/
|
|
protected void readRequestLine(InputStream in) throws IOException {
|
|
// RFC2616#4.1: should accept empty lines before request line
|
|
// RFC2616#19.3: tolerate additional whitespace between tokens
|
|
String line;
|
|
try {
|
|
do {
|
|
line = readLine(in);
|
|
} while (line.length() == 0);
|
|
} catch (IOException ioe) { // if EOF, timeout etc.
|
|
throw new IOException("missing request line"); // signal that the request did not begin
|
|
}
|
|
String[] tokens = split(line, " ", -1);
|
|
if (tokens.length != 3) throw new IOException("invalid request line: \"" + line + "\"");
|
|
try {
|
|
method = tokens[0];
|
|
// must remove '//' prefix which constructor parses as host name
|
|
uri = new URI(trimDuplicates(tokens[1], '/'));
|
|
version = tokens[2]; // RFC2616#2.1: allow implied LWS; RFC7230#3.1.1: disallow it
|
|
} catch (URISyntaxException use) {
|
|
throw new IOException("invalid URI: " + use.getMessage());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the virtual host corresponding to the requested host name, or the default host if
|
|
* none exists.
|
|
*
|
|
* @return the virtual host corresponding to the requested host name, or the default virtual
|
|
* host
|
|
*/
|
|
public VirtualHost getVirtualHost() {
|
|
return host != null
|
|
? host
|
|
: (host = HTTPServer.this.getVirtualHost(getBaseURL().getHost())) != null
|
|
? host
|
|
: (host = HTTPServer.this.getVirtualHost(null));
|
|
}
|
|
|
|
/**
|
|
* Returns the info of the context handling this request.
|
|
*
|
|
* @return the info of the context handling this request, or an empty context
|
|
*/
|
|
public VirtualHost.ContextInfo getContext() {
|
|
return context != null ? context : (context = getVirtualHost().getContext(getPath()));
|
|
}
|
|
}
|
|
|
|
/** The {@code Response} class encapsulates a single HTTP response. */
|
|
public class Response implements Closeable {
|
|
|
|
protected OutputStream out; // the underlying output stream
|
|
protected OutputStream[] encoders = new OutputStream[4]; // chained encoder streams
|
|
protected Headers headers;
|
|
protected boolean discardBody;
|
|
protected int state; // nothing sent, headers sent, or closed
|
|
protected Request req; // request used in determining client capabilities
|
|
|
|
/**
|
|
* Constructs a Response whose output is written to the given stream.
|
|
*
|
|
* @param out the stream to which the response is written
|
|
*/
|
|
public Response(OutputStream out) {
|
|
this.out = out;
|
|
this.headers = new Headers();
|
|
}
|
|
|
|
/**
|
|
* Sets whether this response's body is discarded or sent.
|
|
*
|
|
* @param discardBody specifies whether the body is discarded or not
|
|
*/
|
|
public void setDiscardBody(boolean discardBody) {
|
|
this.discardBody = discardBody;
|
|
}
|
|
|
|
/**
|
|
* Sets the request which is used in determining the capabilities supported by the client (e.g.
|
|
* compression, encoding, etc.)
|
|
*
|
|
* @param req the request
|
|
*/
|
|
public void setClientCapabilities(Request req) {
|
|
this.req = req;
|
|
}
|
|
|
|
/**
|
|
* Returns the request headers collection.
|
|
*
|
|
* @return the request headers collection
|
|
*/
|
|
public Headers getHeaders() {
|
|
return headers;
|
|
}
|
|
|
|
/**
|
|
* Returns the underlying output stream to which the response is written. Except for special
|
|
* cases, you should use {@link #getBody()} instead.
|
|
*
|
|
* @return the underlying output stream to which the response is written
|
|
*/
|
|
public OutputStream getOutputStream() {
|
|
return out;
|
|
}
|
|
|
|
/**
|
|
* Returns whether the response headers were already sent.
|
|
*
|
|
* @return whether the response headers were already sent
|
|
*/
|
|
public boolean headersSent() {
|
|
return state == 1;
|
|
}
|
|
|
|
/**
|
|
* Returns an output stream into which the response body can be written. The stream applies
|
|
* encodings (e.g. compression) according to the sent headers. This method must be called after
|
|
* response headers have been sent that indicate there is a body. Normally, the content should
|
|
* be prepared (not sent) even before the headers are sent, so that any errors during processing
|
|
* can be caught and a proper error response returned - after the headers are sent, it's too
|
|
* late to change the status into an error.
|
|
*
|
|
* @return an output stream into which the response body can be written, or null if the body
|
|
* should not be written (e.g. it is discarded)
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public OutputStream getBody() throws IOException {
|
|
if (encoders[0] != null || discardBody)
|
|
return encoders[0]; // return the existing stream (or null)
|
|
// set up chain of encoding streams according to headers
|
|
List<String> te = Arrays.asList(splitElements(headers.get("Transfer-Encoding"), true));
|
|
List<String> ce = Arrays.asList(splitElements(headers.get("Content-Encoding"), true));
|
|
int i = encoders.length - 1;
|
|
encoders[i] =
|
|
new FilterOutputStream(out) {
|
|
@Override
|
|
public void close() {} // keep underlying connection stream open for now
|
|
|
|
@Override // override the very inefficient default implementation
|
|
public void write(byte[] b, int off, int len) throws IOException {
|
|
out.write(b, off, len);
|
|
}
|
|
};
|
|
if (te.contains("chunked")) encoders[--i] = new ChunkedOutputStream(encoders[i + 1]);
|
|
if (ce.contains("gzip") || te.contains("gzip"))
|
|
encoders[--i] = new GZIPOutputStream(encoders[i + 1], 4096);
|
|
else if (ce.contains("deflate") || te.contains("deflate"))
|
|
encoders[--i] = new DeflaterOutputStream(encoders[i + 1]);
|
|
encoders[0] = encoders[i];
|
|
encoders[i] = null; // prevent duplicate reference
|
|
return encoders[0]; // returned stream is always first
|
|
}
|
|
|
|
/**
|
|
* Closes this response and flushes all output.
|
|
*
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public void close() throws IOException {
|
|
state = -1; // closed
|
|
if (encoders[0] != null)
|
|
encoders[0].close(); // close all chained streams (except the underlying one)
|
|
out.flush(); // always flush underlying stream (even if getBody was never called)
|
|
}
|
|
|
|
/**
|
|
* Sends the response headers with the given response status. A Date header is added if it does
|
|
* not already exist. If the response has a body, the Content-Length/Transfer-Encoding and
|
|
* Content-Type headers must be set before sending the headers.
|
|
*
|
|
* @param status the response status
|
|
* @throws IOException if an error occurs or headers were already sent
|
|
* @see #sendHeaders(int, long, long, String, String, long[])
|
|
*/
|
|
public void sendHeaders(int status) throws IOException {
|
|
if (headersSent()) throw new IOException("headers were already sent");
|
|
if (!headers.contains("Date")) headers.add("Date", formatDate(System.currentTimeMillis()));
|
|
headers.add("Server", "JLHTTP/2.4");
|
|
out.write(getBytes("HTTP/1.1 ", Integer.toString(status), " ", statuses[status]));
|
|
out.write(CRLF);
|
|
headers.writeTo(out);
|
|
state = 1; // headers sent
|
|
}
|
|
|
|
/**
|
|
* Sends the response headers, including the given response status and description, and all
|
|
* response headers. If they do not already exist, the following headers are added as necessary:
|
|
* Content-Range, Content-Type, Transfer-Encoding, Content-Encoding, Content-Length,
|
|
* Last-Modified, ETag, Connection and Date. Ranges are properly calculated as well, with a 200
|
|
* status changed to a 206 status.
|
|
*
|
|
* @param status the response status
|
|
* @param length the response body length, or zero if there is no body, or negative if there is
|
|
* a body but its length is not yet known
|
|
* @param lastModified the last modified date of the response resource, or non-positive if
|
|
* unknown. A time in the future will be replaced with the current system time.
|
|
* @param etag the ETag of the response resource, or null if unknown (see RFC2616#3.11)
|
|
* @param contentType the content type of the response resource, or null if unknown (in which
|
|
* case "application/octet-stream" will be sent)
|
|
* @param range the content range that will be sent, or null if the entire resource will be sent
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public void sendHeaders(
|
|
int status, long length, long lastModified, String etag, String contentType, long[] range)
|
|
throws IOException {
|
|
if (range != null) {
|
|
headers.add(
|
|
"Content-Range",
|
|
"bytes " + range[0] + "-" + range[1] + "/" + (length >= 0 ? length : "*"));
|
|
length = range[1] - range[0] + 1;
|
|
if (status == 200) status = 206;
|
|
}
|
|
String ct = headers.get("Content-Type");
|
|
if (ct == null) {
|
|
ct = contentType != null ? contentType : "application/octet-stream";
|
|
headers.add("Content-Type", ct);
|
|
}
|
|
if (!headers.contains("Content-Length") && !headers.contains("Transfer-Encoding")) {
|
|
// RFC2616#3.6: transfer encodings are case-insensitive and must not be sent to an HTTP/1.0
|
|
// client
|
|
boolean modern = req != null && req.getVersion().endsWith("1.1");
|
|
String accepted = req == null ? null : req.getHeaders().get("Accept-Encoding");
|
|
List<String> encodings = Arrays.asList(splitElements(accepted, true));
|
|
String compression =
|
|
encodings.contains("gzip") ? "gzip" : encodings.contains("deflate") ? "deflate" : null;
|
|
if (compression != null && (length < 0 || length > 300) && isCompressible(ct) && modern) {
|
|
headers.add("Transfer-Encoding", "chunked"); // compressed data is always unknown length
|
|
headers.add("Content-Encoding", compression);
|
|
} else if (length < 0 && modern) {
|
|
headers.add("Transfer-Encoding", "chunked"); // unknown length
|
|
} else if (length >= 0) {
|
|
headers.add("Content-Length", Long.toString(length)); // known length
|
|
}
|
|
}
|
|
if (!headers.contains("Vary")) // RFC7231#7.1.4: Vary field should include headers
|
|
headers.add("Vary", "Accept-Encoding"); // that are used in selecting representation
|
|
if (lastModified > 0 && !headers.contains("Last-Modified")) // RFC2616#14.29
|
|
headers.add("Last-Modified", formatDate(Math.min(lastModified, System.currentTimeMillis())));
|
|
if (etag != null && !headers.contains("ETag")) headers.add("ETag", etag);
|
|
if (req != null
|
|
&& "close".equalsIgnoreCase(req.getHeaders().get("Connection"))
|
|
&& !headers.contains("Connection"))
|
|
headers.add("Connection", "close"); // #RFC7230#6.6: should reply to close with close
|
|
sendHeaders(status);
|
|
}
|
|
|
|
/**
|
|
* Sends the full response with the given status, and the given string as the body. The text is
|
|
* sent in the UTF-8 charset. If a Content-Type header was not explicitly set, it will be set to
|
|
* text/html, and so the text must contain valid (and properly {@link HTTPServer#escapeHTML
|
|
* escaped}) HTML.
|
|
*
|
|
* @param status the response status
|
|
* @param text the text body (sent as text/html)
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public void send(int status, String text) throws IOException {
|
|
byte[] content = text.getBytes("UTF-8");
|
|
sendHeaders(
|
|
status,
|
|
content.length,
|
|
-1,
|
|
"W/\"" + Integer.toHexString(text.hashCode()) + "\"",
|
|
"text/html; charset=utf-8",
|
|
null);
|
|
OutputStream out = getBody();
|
|
if (out != null) out.write(content);
|
|
}
|
|
|
|
public void send(int status, byte[] text) throws IOException {
|
|
// byte[] content = text.getBytes("UTF-8");
|
|
byte[] content = text;
|
|
sendHeaders(
|
|
status,
|
|
content.length,
|
|
-1,
|
|
"W/\"" + Integer.toHexString(text.hashCode()) + "\"",
|
|
"text/html; charset=utf-8",
|
|
null);
|
|
OutputStream out = getBody();
|
|
if (out != null) out.write(content);
|
|
}
|
|
|
|
/**
|
|
* Sends an error response with the given status and detailed message. An HTML body is created
|
|
* containing the status and its description, as well as the message, which is escaped using the
|
|
* {@link HTTPServer#escapeHTML escape} method.
|
|
*
|
|
* @param status the response status
|
|
* @param text the text body (sent as text/html)
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public void sendError(int status, String text) throws IOException {
|
|
send(
|
|
status,
|
|
String.format(
|
|
"<!DOCTYPE html>%n<html>%n<head><title>%d %s</title></head>%n"
|
|
+ "<body><h1>%d %s</h1>%n<p>%s</p>%n</body></html>",
|
|
status, statuses[status], status, statuses[status], escapeHTML(text)));
|
|
}
|
|
|
|
/**
|
|
* Sends an error response with the given status and default body.
|
|
*
|
|
* @param status the response status
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public void sendError(int status) throws IOException {
|
|
String text = status < 400 ? ":)" : "sorry it didn't work out :(";
|
|
sendError(status, text);
|
|
}
|
|
|
|
/**
|
|
* Sends the response body. This method must be called only after the response headers have been
|
|
* sent (and indicate that there is a body).
|
|
*
|
|
* @param body a stream containing the response body
|
|
* @param length the full length of the response body
|
|
* @param range the sub-range within the response body that should be sent, or null if the
|
|
* entire body should be sent
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public void sendBody(InputStream body, long length, long[] range) throws IOException {
|
|
OutputStream out = getBody();
|
|
if (out != null) {
|
|
if (range != null) {
|
|
long offset = range[0];
|
|
length = range[1] - range[0] + 1;
|
|
while (offset > 0) {
|
|
long skip = body.skip(offset);
|
|
if (skip == 0) throw new IOException("can't skip to " + range[0]);
|
|
offset -= skip;
|
|
}
|
|
}
|
|
transfer(body, out, length);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sends a 301 or 302 response, redirecting the client to the given URL.
|
|
*
|
|
* @param url the absolute URL to which the client is redirected
|
|
* @param permanent specifies whether a permanent (301) or temporary (302) redirect status is
|
|
* sent
|
|
* @throws IOException if an IO error occurs or url is malformed
|
|
*/
|
|
public void redirect(String url, boolean permanent) throws IOException {
|
|
try {
|
|
url = new URI(url).toASCIIString();
|
|
} catch (URISyntaxException e) {
|
|
throw new IOException("malformed URL: " + url);
|
|
}
|
|
headers.add("Location", url);
|
|
// some user-agents expect a body, so we send it
|
|
if (permanent) sendError(301, "Permanently moved to " + url);
|
|
else sendError(302, "Temporarily moved to " + url);
|
|
}
|
|
}
|
|
|
|
/** The {@code SocketHandlerThread} handles accepted sockets. */
|
|
protected class SocketHandlerThread extends Thread {
|
|
@Override
|
|
public void run() {
|
|
setName(getClass().getSimpleName() + "-" + port);
|
|
try {
|
|
ServerSocket serv = HTTPServer.this.serv; // keep local to avoid NPE when stopped
|
|
while (serv != null && !serv.isClosed()) {
|
|
final Socket sock = serv.accept();
|
|
executor.execute(
|
|
new Runnable() {
|
|
public void run() {
|
|
try {
|
|
try {
|
|
sock.setSoTimeout(socketTimeout);
|
|
sock.setTcpNoDelay(true); // we buffer anyway, so improve latency
|
|
handleConnection(sock.getInputStream(), sock.getOutputStream());
|
|
} finally {
|
|
try {
|
|
// RFC7230#6.6 - close socket gracefully
|
|
// (except SSL socket which doesn't support half-closing)
|
|
if (!(sock instanceof SSLSocket)) {
|
|
sock.shutdownOutput(); // half-close socket (only output)
|
|
transfer(sock.getInputStream(), null, -1); // consume input
|
|
}
|
|
} finally {
|
|
sock.close(); // and finally close socket fully
|
|
}
|
|
}
|
|
} catch (IOException ignore) {
|
|
}
|
|
}
|
|
});
|
|
}
|
|
} catch (IOException ignore) {
|
|
}
|
|
}
|
|
}
|
|
|
|
protected volatile int port;
|
|
protected volatile int socketTimeout = 10000;
|
|
protected volatile ServerSocketFactory serverSocketFactory;
|
|
protected volatile boolean secure;
|
|
protected volatile Executor executor;
|
|
protected volatile ServerSocket serv;
|
|
protected final Map<String, VirtualHost> hosts = new ConcurrentHashMap<String, VirtualHost>();
|
|
|
|
/**
|
|
* Constructs an lc.HTTPServer which can accept connections on the given port. Note: the {@link
|
|
* #start()} method must be called to start accepting connections.
|
|
*
|
|
* @param port the port on which this server will accept connections
|
|
*/
|
|
public HTTPServer(int port) {
|
|
setPort(port);
|
|
addVirtualHost(new VirtualHost(null)); // add default virtual host
|
|
}
|
|
|
|
/**
|
|
* Constructs an lc.HTTPServer which can accept connections on the default HTTP port 80. Note: the
|
|
* {@link #start()} method must be called to start accepting connections.
|
|
*/
|
|
public HTTPServer() {
|
|
this(80);
|
|
}
|
|
|
|
/**
|
|
* Sets the port on which this server will accept connections.
|
|
*
|
|
* @param port the port on which this server will accept connections
|
|
*/
|
|
public void setPort(int port) {
|
|
this.port = port;
|
|
}
|
|
|
|
/**
|
|
* Sets the factory used to create the server socket. If null or not set, the default {@link
|
|
* ServerSocketFactory#getDefault()} is used. For secure sockets (HTTPS), use an
|
|
* SSLServerSocketFactory instance. The port should usually also be changed for HTTPS, e.g. port
|
|
* 443 instead of 80.
|
|
*
|
|
* <p>If using the default SSLServerSocketFactory returned by {@link
|
|
* SSLServerSocketFactory#getDefault()}, the appropriate system properties must be set to
|
|
* configure the default JSSE provider, such as {@code javax.net.ssl.keyStore} and {@code
|
|
* javax.net.ssl.keyStorePassword}.
|
|
*
|
|
* @param factory the server socket factory to use
|
|
*/
|
|
public void setServerSocketFactory(ServerSocketFactory factory) {
|
|
this.serverSocketFactory = factory;
|
|
this.secure = factory instanceof SSLServerSocketFactory;
|
|
}
|
|
|
|
/**
|
|
* Sets the socket timeout for established connections.
|
|
*
|
|
* @param timeout the socket timeout in milliseconds
|
|
*/
|
|
public void setSocketTimeout(int timeout) {
|
|
this.socketTimeout = timeout;
|
|
}
|
|
|
|
/**
|
|
* Sets the executor used in servicing HTTP connections. If null, a default executor is used. The
|
|
* caller is responsible for shutting down the provided executor when necessary.
|
|
*
|
|
* @param executor the executor to use
|
|
*/
|
|
public void setExecutor(Executor executor) {
|
|
this.executor = executor;
|
|
}
|
|
|
|
/**
|
|
* Returns the virtual host with the given name.
|
|
*
|
|
* @param name the name of the virtual host to return, or null for the default virtual host
|
|
* @return the virtual host with the given name, or null if it doesn't exist
|
|
*/
|
|
public VirtualHost getVirtualHost(String name) {
|
|
return hosts.get(name == null ? VirtualHost.DEFAULT_HOST_NAME : name);
|
|
}
|
|
|
|
/**
|
|
* Returns all virtual hosts.
|
|
*
|
|
* @return all virtual hosts (as an unmodifiable set)
|
|
*/
|
|
public Set<VirtualHost> getVirtualHosts() {
|
|
return Collections.unmodifiableSet(new HashSet<VirtualHost>(hosts.values()));
|
|
}
|
|
|
|
/**
|
|
* Adds the given virtual host to the server. If the host's name or aliases already exist, they
|
|
* are overwritten.
|
|
*
|
|
* @param host the virtual host to add
|
|
*/
|
|
public void addVirtualHost(VirtualHost host) {
|
|
String name = host.getName();
|
|
hosts.put(name == null ? VirtualHost.DEFAULT_HOST_NAME : name, host);
|
|
}
|
|
|
|
/**
|
|
* Creates the server socket used to accept connections, using the configured {@link
|
|
* #setServerSocketFactory ServerSocketFactory} and {@link #setPort port}.
|
|
*
|
|
* <p>Cryptic errors seen here often mean the factory configuration details are wrong.
|
|
*
|
|
* @return the created server socket
|
|
* @throws IOException if the socket cannot be created
|
|
*/
|
|
protected ServerSocket createServerSocket() throws IOException {
|
|
ServerSocket serv = serverSocketFactory.createServerSocket();
|
|
serv.setReuseAddress(true);
|
|
serv.bind(new InetSocketAddress(port));
|
|
return serv;
|
|
}
|
|
|
|
/**
|
|
* Starts this server. If it is already started, does nothing. Note: Once the server is started,
|
|
* configuration-altering methods of the server and its virtual hosts must not be used. To modify
|
|
* the configuration, the server must first be stopped.
|
|
*
|
|
* @throws IOException if the server cannot begin accepting connections
|
|
*/
|
|
public synchronized void start() throws IOException {
|
|
if (serv != null) return;
|
|
if (serverSocketFactory == null) // assign default server socket factory if needed
|
|
serverSocketFactory = ServerSocketFactory.getDefault(); // plain sockets
|
|
serv = createServerSocket();
|
|
if (executor == null) // assign default executor if needed
|
|
executor = Executors.newCachedThreadPool(); // consumes no resources when idle
|
|
// register all host aliases (which may have been modified)
|
|
for (VirtualHost host : getVirtualHosts())
|
|
for (String alias : host.getAliases()) hosts.put(alias, host);
|
|
// start handling incoming connections
|
|
new SocketHandlerThread().start();
|
|
}
|
|
|
|
/**
|
|
* Stops this server. If it is already stopped, does nothing. Note that if an {@link #setExecutor
|
|
* Executor} was set, it must be closed separately.
|
|
*/
|
|
public synchronized void stop() {
|
|
try {
|
|
if (serv != null) serv.close();
|
|
} catch (IOException ignore) {
|
|
}
|
|
serv = null;
|
|
}
|
|
|
|
/**
|
|
* Handles communications for a single connection over the given streams. Multiple subsequent
|
|
* transactions are handled on the connection, until the streams are closed, an error occurs, or
|
|
* the request contains a "Connection: close" header which explicitly requests the connection be
|
|
* closed after the transaction ends.
|
|
*
|
|
* @param in the stream from which the incoming requests are read
|
|
* @param out the stream into which the outgoing responses are written
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
protected void handleConnection(InputStream in, OutputStream out) throws IOException {
|
|
in = new BufferedInputStream(in, 4096);
|
|
out = new BufferedOutputStream(out, 4096);
|
|
Request req;
|
|
Response resp;
|
|
do {
|
|
// create request and response and handle transaction
|
|
req = null;
|
|
resp = new Response(out);
|
|
try {
|
|
req = new Request(in);
|
|
handleTransaction(req, resp);
|
|
} catch (Throwable t) { // unhandled errors (not normal error responses like 404)
|
|
if (req == null) { // error reading request
|
|
if (t instanceof IOException && t.getMessage().contains("missing request line"))
|
|
break; // we're not in the middle of a transaction - so just disconnect
|
|
resp.getHeaders().add("Connection", "close"); // about to close connection
|
|
if (t instanceof InterruptedIOException) // e.g. SocketTimeoutException
|
|
resp.sendError(408, "Timeout waiting for client request");
|
|
else resp.sendError(400, "Invalid request: " + t.getMessage());
|
|
} else if (!resp
|
|
.headersSent()) { // if headers were not already sent, we can send an error response
|
|
resp = new Response(out); // ignore whatever headers may have already been set
|
|
resp.getHeaders().add("Connection", "close"); // about to close connection
|
|
resp.sendError(500, "Error processing request: " + t.getMessage());
|
|
} // otherwise just abort the connection since we can't recover
|
|
break; // proceed to close connection
|
|
} finally {
|
|
resp.close(); // close response and flush output
|
|
}
|
|
// consume any leftover body data so next request can be processed
|
|
transfer(req.getBody(), null, -1);
|
|
// RFC7230#6.6: persist connection unless client or server close explicitly (or legacy client)
|
|
} while (!"close".equalsIgnoreCase(req.getHeaders().get("Connection"))
|
|
&& !"close".equalsIgnoreCase(resp.getHeaders().get("Connection"))
|
|
&& req.getVersion().endsWith("1.1"));
|
|
}
|
|
|
|
/**
|
|
* Handles a single transaction on a connection.
|
|
*
|
|
* <p>Subclasses can override this method to perform filtering on the request or response, apply
|
|
* wrappers to them, or further customize the transaction processing in some other way.
|
|
*
|
|
* @param req the transaction request
|
|
* @param resp the transaction response (into which the response is written)
|
|
* @throws IOException if and error occurs
|
|
*/
|
|
protected void handleTransaction(Request req, Response resp) throws IOException {
|
|
resp.setClientCapabilities(req);
|
|
if (preprocessTransaction(req, resp)) handleMethod(req, resp);
|
|
}
|
|
|
|
/**
|
|
* Preprocesses a transaction, performing various validation checks and required special header
|
|
* handling, possibly returning an appropriate response.
|
|
*
|
|
* @param req the request
|
|
* @param resp the response
|
|
* @return whether further processing should be performed on the transaction
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
protected boolean preprocessTransaction(Request req, Response resp) throws IOException {
|
|
Headers reqHeaders = req.getHeaders();
|
|
// validate request
|
|
String version = req.getVersion();
|
|
if (version.equals("HTTP/1.1")) {
|
|
if (!reqHeaders.contains("Host")) {
|
|
// RFC2616#14.23: missing Host header gets 400
|
|
resp.sendError(400, "Missing required Host header");
|
|
return false;
|
|
}
|
|
// return a continue response before reading body
|
|
String expect = reqHeaders.get("Expect");
|
|
if (expect != null) {
|
|
if (expect.equalsIgnoreCase("100-continue")) {
|
|
Response tempResp = new Response(resp.getOutputStream());
|
|
tempResp.sendHeaders(100);
|
|
resp.getOutputStream().flush();
|
|
} else {
|
|
// RFC2616#14.20: if unknown expect, send 417
|
|
resp.sendError(417);
|
|
return false;
|
|
}
|
|
}
|
|
} else if (version.equals("HTTP/1.0") || version.equals("HTTP/0.9")) {
|
|
// RFC2616#14.10 - remove connection headers from older versions
|
|
for (String token : splitElements(reqHeaders.get("Connection"), false))
|
|
reqHeaders.remove(token);
|
|
} else {
|
|
resp.sendError(400, "Unknown version: " + version);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Handles a transaction according to the request method.
|
|
*
|
|
* @param req the transaction request
|
|
* @param resp the transaction response (into which the response is written)
|
|
* @throws IOException if and error occurs
|
|
*/
|
|
protected void handleMethod(Request req, Response resp) throws IOException {
|
|
String method = req.getMethod();
|
|
Map<String, ContextHandler> handlers = req.getContext().getHandlers();
|
|
// RFC 2616#5.1.1 - GET and HEAD must be supported
|
|
if (method.equals("GET") || handlers.containsKey(method)) {
|
|
serve(req, resp); // method is handled by context handler (or 404)
|
|
} else if (method.equals("HEAD")) { // default HEAD handler
|
|
req.method = "GET"; // identical to a GET
|
|
resp.setDiscardBody(true); // process normally but discard body
|
|
serve(req, resp);
|
|
} else if (method.equals("TRACE")) { // default TRACE handler
|
|
handleTrace(req, resp);
|
|
} else {
|
|
Set<String> methods = new LinkedHashSet<String>();
|
|
methods.addAll(Arrays.asList("GET", "HEAD", "TRACE", "OPTIONS")); // built-in methods
|
|
// "*" is a special server-wide (no-context) request supported by OPTIONS
|
|
boolean isServerOptions = req.getPath().equals("*") && method.equals("OPTIONS");
|
|
methods.addAll(isServerOptions ? req.getVirtualHost().getMethods() : handlers.keySet());
|
|
resp.getHeaders().add("Allow", join(", ", methods));
|
|
if (method.equals("OPTIONS")) { // default OPTIONS handler
|
|
resp.getHeaders().add("Content-Length", "0"); // RFC2616#9.2
|
|
resp.sendHeaders(200);
|
|
} else if (req.getVirtualHost().getMethods().contains(method)) {
|
|
resp.sendHeaders(405); // supported by server, but not this context (nor built-in)
|
|
} else {
|
|
resp.sendError(501); // unsupported method
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handles a TRACE method request.
|
|
*
|
|
* @param req the request
|
|
* @param resp the response into which the content is written
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public void handleTrace(Request req, Response resp) throws IOException {
|
|
resp.sendHeaders(200, -1, -1, null, "message/http", null);
|
|
OutputStream out = resp.getBody();
|
|
out.write(getBytes("TRACE ", req.getURI().toString(), " ", req.getVersion()));
|
|
out.write(CRLF);
|
|
req.getHeaders().writeTo(out);
|
|
transfer(req.getBody(), out, -1);
|
|
}
|
|
|
|
/**
|
|
* Serves the content for a request by invoking the context handler for the requested context
|
|
* (path) and HTTP method.
|
|
*
|
|
* @param req the request
|
|
* @param resp the response into which the content is written
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
protected void serve(Request req, Response resp) throws IOException {
|
|
// get context handler to handle request
|
|
ContextHandler handler = req.getContext().getHandlers().get(req.getMethod());
|
|
if (handler == null) {
|
|
resp.sendError(404);
|
|
return;
|
|
}
|
|
// serve request
|
|
int status = 404;
|
|
// add directory index if necessary
|
|
String path = req.getPath();
|
|
if (path.endsWith("/")) {
|
|
String index = req.getVirtualHost().getDirectoryIndex();
|
|
if (index != null) {
|
|
req.setPath(path + index);
|
|
status = handler.serve(req, resp);
|
|
req.setPath(path);
|
|
}
|
|
}
|
|
if (status == 404) status = handler.serve(req, resp);
|
|
if (status > 0) resp.sendError(status);
|
|
}
|
|
|
|
/**
|
|
* Adds a Content-Type mapping for the given path suffixes. If any of the path suffixes had a
|
|
* previous Content-Type associated with it, it is replaced with the given one. Path suffixes are
|
|
* considered case-insensitive, and contentType is converted to lowercase.
|
|
*
|
|
* @param contentType the content type (MIME type) to be associated with the given path suffixes
|
|
* @param suffixes the path suffixes which will be associated with the contentType, e.g. the file
|
|
* extensions of served files (excluding the '.' character)
|
|
*/
|
|
public static void addContentType(String contentType, String... suffixes) {
|
|
for (String suffix : suffixes)
|
|
contentTypes.put(suffix.toLowerCase(Locale.US), contentType.toLowerCase(Locale.US));
|
|
}
|
|
|
|
/**
|
|
* Adds Content-Type mappings from a standard mime.types file.
|
|
*
|
|
* @param mimeTypes a mime.types file
|
|
* @throws IOException if an error occurs
|
|
* @throws FileNotFoundException if the file is not found or cannot be read
|
|
*/
|
|
public static void addContentTypes(File mimeTypes) throws IOException {
|
|
InputStream in = new FileInputStream(mimeTypes);
|
|
try {
|
|
while (true) {
|
|
String line = readLine(in).trim(); // throws EOFException when done
|
|
if (line.length() > 0 && line.charAt(0) != '#') {
|
|
String[] tokens = split(line, " \t", -1);
|
|
for (int i = 1; i < tokens.length; i++) addContentType(tokens[0], tokens[i]);
|
|
}
|
|
}
|
|
} catch (EOFException ignore) { // the end of file was reached - it's ok
|
|
} finally {
|
|
in.close();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the content type for the given path, according to its suffix, or the given default
|
|
* content type if none can be determined.
|
|
*
|
|
* @param path the path whose content type is requested
|
|
* @param def a default content type which is returned if none can be determined
|
|
* @return the content type for the given path, or the given default
|
|
*/
|
|
public static String getContentType(String path, String def) {
|
|
int dot = path.lastIndexOf('.');
|
|
String type = dot < 0 ? def : contentTypes.get(path.substring(dot + 1).toLowerCase(Locale.US));
|
|
return type != null ? type : def;
|
|
}
|
|
|
|
/**
|
|
* Checks whether data of the given content type (MIME type) is compressible.
|
|
*
|
|
* @param contentType the content type
|
|
* @return true if the data is compressible, false if not
|
|
*/
|
|
public static boolean isCompressible(String contentType) {
|
|
int pos = contentType.indexOf(';'); // exclude params
|
|
String ct = pos < 0 ? contentType : contentType.substring(0, pos);
|
|
for (String s : compressibleContentTypes)
|
|
if (s.equals(ct)
|
|
|| s.charAt(0) == '*' && ct.endsWith(s.substring(1))
|
|
|| s.charAt(s.length() - 1) == '*' && ct.startsWith(s.substring(0, s.length() - 1)))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Returns the local host's auto-detected name.
|
|
*
|
|
* @return the local host name
|
|
*/
|
|
public static String detectLocalHostName() {
|
|
try {
|
|
return InetAddress.getLocalHost().getCanonicalHostName();
|
|
} catch (UnknownHostException uhe) {
|
|
return "localhost";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parses name-value pair parameters from the given "x-www-form-urlencoded" MIME-type string. This
|
|
* is the encoding used both for parameters passed as the query of an HTTP GET method, and as the
|
|
* content of HTML forms submitted using the HTTP POST method (as long as they use the default
|
|
* "application/x-www-form-urlencoded" encoding in their ENCTYPE attribute). UTF-8 encoding is
|
|
* assumed.
|
|
*
|
|
* <p>The parameters are returned as a list of string arrays, each containing the parameter name
|
|
* as the first element and its corresponding value as the second element (or an empty string if
|
|
* there is no value).
|
|
*
|
|
* <p>The list retains the original order of the parameters.
|
|
*
|
|
* @param s an "application/x-www-form-urlencoded" string
|
|
* @return the parameter name-value pairs parsed from the given string, or an empty list if there
|
|
* are none
|
|
*/
|
|
public static List<String[]> parseParamsList(String s) {
|
|
if (s == null || s.length() == 0) return Collections.emptyList();
|
|
List<String[]> params = new ArrayList<String[]>(8);
|
|
for (String pair : split(s, "&", -1)) {
|
|
int pos = pair.indexOf('=');
|
|
String name = pos < 0 ? pair : pair.substring(0, pos);
|
|
String val = pos < 0 ? "" : pair.substring(pos + 1);
|
|
try {
|
|
name = URLDecoder.decode(name.trim(), "UTF-8");
|
|
val = URLDecoder.decode(val.trim(), "UTF-8");
|
|
if (name.length() > 0) params.add(new String[] {name, val});
|
|
} catch (UnsupportedEncodingException ignore) {
|
|
} // never thrown
|
|
}
|
|
return params;
|
|
}
|
|
|
|
/**
|
|
* Converts a collection of pairs of objects (arrays of size two, each representing a key and
|
|
* corresponding value) into a Map. Duplicate keys are ignored (only the first occurrence of each
|
|
* key is considered). The map retains the original collection's iteration order.
|
|
*
|
|
* @param pairs a collection of arrays, each containing a key and corresponding value
|
|
* @param <K> the key type
|
|
* @param <V> the value type
|
|
* @return a map containing the paired keys and values, or an empty map
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public static <K, V> Map<K, V> toMap(Collection<? extends Object[]> pairs) {
|
|
if (pairs == null || pairs.isEmpty()) return Collections.emptyMap();
|
|
Map<K, V> map = new LinkedHashMap<K, V>(pairs.size());
|
|
for (Object[] pair : pairs) if (!map.containsKey(pair[0])) map.put((K) pair[0], (V) pair[1]);
|
|
return map;
|
|
}
|
|
|
|
/**
|
|
* Returns the absolute (zero-based) content range value specified by the given range string. If
|
|
* multiple ranges are requested, a single range containing all of them is returned.
|
|
*
|
|
* @param range the string containing the range description
|
|
* @param length the full length of the requested resource
|
|
* @return the requested range, or null if the range value is invalid
|
|
*/
|
|
public static long[] parseRange(String range, long length) {
|
|
long min = Long.MAX_VALUE;
|
|
long max = Long.MIN_VALUE;
|
|
try {
|
|
for (String token : splitElements(range, false)) {
|
|
long start, end;
|
|
int dash = token.indexOf('-');
|
|
if (dash == 0) { // suffix range
|
|
start = length - parseULong(token.substring(1), 10);
|
|
end = length - 1;
|
|
} else if (dash == token.length() - 1) { // open range
|
|
start = parseULong(token.substring(0, dash), 10);
|
|
end = length - 1;
|
|
} else { // explicit range
|
|
start = parseULong(token.substring(0, dash), 10);
|
|
end = parseULong(token.substring(dash + 1), 10);
|
|
}
|
|
if (end < start) throw new RuntimeException();
|
|
if (start < min) min = start;
|
|
if (end > max) max = end;
|
|
}
|
|
if (max < 0) // no tokens
|
|
throw new RuntimeException();
|
|
if (max >= length && min < length) max = length - 1;
|
|
return new long[] {min, max}; // start might be >= length!
|
|
} catch (RuntimeException re) { // NFE, IOOBE or explicit RE
|
|
return null; // RFC2616#14.35.1 - ignore header if invalid
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parses an unsigned long value. This method behaves the same as calling {@link
|
|
* Long#parseLong(String, int)}, but considers the string invalid if it starts with an ASCII minus
|
|
* sign ('-') or plus sign ('+').
|
|
*
|
|
* @param s the String containing the long representation to be parsed
|
|
* @param radix the radix to be used while parsing s
|
|
* @return the long represented by s in the specified radix
|
|
* @throws NumberFormatException if the string does not contain a parsable long, or if it starts
|
|
* with an ASCII minus sign or plus sign
|
|
*/
|
|
public static long parseULong(String s, int radix) throws NumberFormatException {
|
|
long val = Long.parseLong(s, radix); // throws NumberFormatException
|
|
if (s.charAt(0) == '-' || s.charAt(0) == '+')
|
|
throw new NumberFormatException("invalid digit: " + s.charAt(0));
|
|
return val;
|
|
}
|
|
|
|
/**
|
|
* Parses a date string in one of the supported {@link #DATE_PATTERNS}.
|
|
*
|
|
* <p>Received date header values must be in one of the following formats: Sun, 06 Nov 1994
|
|
* 08:49:37 GMT ; RFC 822, updated by RFC 1123 Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted
|
|
* by RFC 1036 Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format
|
|
*
|
|
* @param time a string representation of a time value
|
|
* @return the parsed date value
|
|
* @throws IllegalArgumentException if the given string does not contain a valid date format in
|
|
* any of the supported formats
|
|
*/
|
|
public static Date parseDate(String time) {
|
|
for (String pattern : DATE_PATTERNS) {
|
|
try {
|
|
SimpleDateFormat df = new SimpleDateFormat(pattern, Locale.US);
|
|
df.setLenient(false);
|
|
df.setTimeZone(GMT);
|
|
return df.parse(time);
|
|
} catch (ParseException ignore) {
|
|
}
|
|
}
|
|
throw new IllegalArgumentException("invalid date format: " + time);
|
|
}
|
|
|
|
/**
|
|
* Formats the given time value as a string in RFC 1123 format.
|
|
*
|
|
* @param time the time in milliseconds since January 1, 1970, 00:00:00 GMT
|
|
* @return the given time value as a string in RFC 1123 format
|
|
*/
|
|
public static String formatDate(long time) {
|
|
// this implementation performs far better than SimpleDateFormat instances, and even
|
|
// quite better than ThreadLocal SDFs - the server's CPU-bound benchmark gains over 20%!
|
|
if (time < -62167392000000L || time > 253402300799999L)
|
|
throw new IllegalArgumentException("year out of range (0001-9999): " + time);
|
|
char[] s = "DAY, 00 MON 0000 00:00:00 GMT".toCharArray(); // copy the format template
|
|
Calendar cal = new GregorianCalendar(GMT, Locale.US);
|
|
cal.setTimeInMillis(time);
|
|
System.arraycopy(DAYS, 4 * (cal.get(Calendar.DAY_OF_WEEK) - 1), s, 0, 3);
|
|
System.arraycopy(MONTHS, 4 * cal.get(Calendar.MONTH), s, 8, 3);
|
|
int n = cal.get(Calendar.DATE);
|
|
s[5] += n / 10;
|
|
s[6] += n % 10;
|
|
n = cal.get(Calendar.YEAR);
|
|
s[12] += n / 1000;
|
|
s[13] += n / 100 % 10;
|
|
s[14] += n / 10 % 10;
|
|
s[15] += n % 10;
|
|
n = cal.get(Calendar.HOUR_OF_DAY);
|
|
s[17] += n / 10;
|
|
s[18] += n % 10;
|
|
n = cal.get(Calendar.MINUTE);
|
|
s[20] += n / 10;
|
|
s[21] += n % 10;
|
|
n = cal.get(Calendar.SECOND);
|
|
s[23] += n / 10;
|
|
s[24] += n % 10;
|
|
return new String(s);
|
|
}
|
|
|
|
/**
|
|
* Splits the given element list string (comma-separated header value) into its constituent
|
|
* non-empty trimmed elements. (RFC2616#2.1: element lists are delimited by a comma and optional
|
|
* LWS, and empty elements are ignored).
|
|
*
|
|
* @param list the element list string
|
|
* @param lower specifies whether the list elements should be lower-cased
|
|
* @return the non-empty elements in the list, or an empty array
|
|
*/
|
|
public static String[] splitElements(String list, boolean lower) {
|
|
return split(lower && list != null ? list.toLowerCase(Locale.US) : list, ",", -1);
|
|
}
|
|
|
|
/**
|
|
* Splits the given string into its constituent non-empty trimmed elements, which are delimited by
|
|
* any of the given delimiter characters. This is a more direct and efficient implementation than
|
|
* using a regex (e.g. String.split()), trimming the elements and removing empty ones.
|
|
*
|
|
* @param str the string to split
|
|
* @param delimiters the characters used as the delimiters between elements
|
|
* @param limit if positive, limits the returned array size (remaining of str in last element)
|
|
* @return the non-empty elements in the string, or an empty array
|
|
*/
|
|
public static String[] split(String str, String delimiters, int limit) {
|
|
if (str == null) return new String[0];
|
|
Collection<String> elements = new ArrayList<String>();
|
|
int len = str.length();
|
|
int start = 0;
|
|
int end;
|
|
while (start < len) {
|
|
for (end = --limit == 0 ? len : start;
|
|
end < len && delimiters.indexOf(str.charAt(end)) < 0;
|
|
end++) ;
|
|
String element = str.substring(start, end).trim();
|
|
if (element.length() > 0) elements.add(element);
|
|
start = end + 1;
|
|
}
|
|
return elements.toArray(new String[elements.size()]);
|
|
}
|
|
|
|
/**
|
|
* Returns a string constructed by joining the string representations of the iterated objects (in
|
|
* order), with the delimiter inserted between them.
|
|
*
|
|
* @param delim the delimiter that is inserted between the joined strings
|
|
* @param items the items whose string representations are joined
|
|
* @param <T> the item type
|
|
* @return the joined string
|
|
*/
|
|
public static <T> String join(String delim, Iterable<T> items) {
|
|
StringBuilder sb = new StringBuilder();
|
|
for (Iterator<T> it = items.iterator(); it.hasNext(); )
|
|
sb.append(it.next()).append(it.hasNext() ? delim : "");
|
|
return sb.toString();
|
|
}
|
|
|
|
/**
|
|
* Returns the parent of the given path.
|
|
*
|
|
* @param path the path whose parent is returned (must start with '/')
|
|
* @return the parent of the given path (excluding trailing slash), or null if given path is the
|
|
* root path
|
|
*/
|
|
public static String getParentPath(String path) {
|
|
path = trimRight(path, '/'); // remove trailing slash
|
|
int slash = path.lastIndexOf('/');
|
|
return slash < 0 ? null : path.substring(0, slash);
|
|
}
|
|
|
|
/**
|
|
* Returns the given string with all occurrences of the given character removed from its right
|
|
* side.
|
|
*
|
|
* @param s the string to trim
|
|
* @param c the character to remove
|
|
* @return the trimmed string
|
|
*/
|
|
public static String trimRight(String s, char c) {
|
|
int len = s.length() - 1;
|
|
int end;
|
|
for (end = len; end >= 0 && s.charAt(end) == c; end--) ;
|
|
return end == len ? s : s.substring(0, end + 1);
|
|
}
|
|
|
|
/**
|
|
* Returns the given string with all occurrences of the given character removed from its left
|
|
* side.
|
|
*
|
|
* @param s the string to trim
|
|
* @param c the character to remove
|
|
* @return the trimmed string
|
|
*/
|
|
public static String trimLeft(String s, char c) {
|
|
int len = s.length();
|
|
int start;
|
|
for (start = 0; start < len && s.charAt(start) == c; start++) ;
|
|
return start == 0 ? s : s.substring(start);
|
|
}
|
|
|
|
/**
|
|
* Trims duplicate consecutive occurrences of the given character within the given string,
|
|
* replacing them with a single instance of the character.
|
|
*
|
|
* @param s the string to trim
|
|
* @param c the character to trim
|
|
* @return the given string with duplicate consecutive occurrences of c replaced by a single
|
|
* instance of c
|
|
*/
|
|
public static String trimDuplicates(String s, char c) {
|
|
int start = 0;
|
|
while ((start = s.indexOf(c, start) + 1) > 0) {
|
|
int end;
|
|
for (end = start; end < s.length() && s.charAt(end) == c; end++) ;
|
|
if (end > start) s = s.substring(0, start) + s.substring(end);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
/**
|
|
* Returns a human-friendly string approximating the given data size, e.g. "316", "1.8K", "324M",
|
|
* etc.
|
|
*
|
|
* @param size the size to display
|
|
* @return a human-friendly string approximating the given data size
|
|
*/
|
|
public static String toSizeApproxString(long size) {
|
|
final char[] units = {' ', 'K', 'M', 'G', 'T', 'P', 'E'};
|
|
int u;
|
|
double s;
|
|
for (u = 0, s = size; s >= 1000; u++, s /= 1024) ;
|
|
return String.format(s < 10 ? "%.1f%c" : "%.0f%c", s, units[u]);
|
|
}
|
|
|
|
/**
|
|
* Returns an HTML-escaped version of the given string for safe display within a web page. The
|
|
* characters '&', '>' and '<' must always be escaped, and single and double quotes must
|
|
* be escaped within attribute values; this method escapes them always. This method can be used
|
|
* for generating both HTML and XHTML valid content.
|
|
*
|
|
* @param s the string to escape
|
|
* @return the escaped string
|
|
* @see <a href="http://www.w3.org/International/questions/qa-escapes">The W3C FAQ</a>
|
|
*/
|
|
public static String escapeHTML(String s) {
|
|
int len = s.length();
|
|
StringBuilder sb = new StringBuilder(len + 30);
|
|
int start = 0;
|
|
for (int i = 0; i < len; i++) {
|
|
String ref = null;
|
|
switch (s.charAt(i)) {
|
|
case '&':
|
|
ref = "&";
|
|
break;
|
|
case '>':
|
|
ref = ">";
|
|
break;
|
|
case '<':
|
|
ref = "<";
|
|
break;
|
|
case '"':
|
|
ref = """;
|
|
break;
|
|
case '\'':
|
|
ref = "'";
|
|
break;
|
|
}
|
|
if (ref != null) {
|
|
sb.append(s.substring(start, i)).append(ref);
|
|
start = i + 1;
|
|
}
|
|
}
|
|
return start == 0 ? s : sb.append(s.substring(start)).toString();
|
|
}
|
|
|
|
/**
|
|
* Converts strings to bytes by casting the chars to bytes. This is a fast way to encode a string
|
|
* as ISO-8859-1/US-ASCII bytes. If multiple strings are provided, their bytes are concatenated.
|
|
*
|
|
* @param strings the strings to convert (containing only ISO-8859-1 chars)
|
|
* @return the byte array
|
|
*/
|
|
public static byte[] getBytes(String... strings) {
|
|
int n = 0;
|
|
for (String s : strings) n += s.length();
|
|
byte[] dest = new byte[n];
|
|
n = 0;
|
|
for (String s : strings)
|
|
for (int i = 0, len = s.length(); i < len; i++) dest[n++] = (byte) s.charAt(i);
|
|
return dest;
|
|
}
|
|
|
|
/**
|
|
* Transfers data from an input stream to an output stream.
|
|
*
|
|
* @param in the input stream to transfer from
|
|
* @param out the output stream to transfer to (or null to discard output)
|
|
* @param len the number of bytes to transfer. If negative, the entire contents of the input
|
|
* stream are transferred.
|
|
* @throws IOException if an IO error occurs or the input stream ends before the requested number
|
|
* of bytes have been read
|
|
*/
|
|
public static void transfer(InputStream in, OutputStream out, long len) throws IOException {
|
|
if (len == 0 || out == null && len < 0 && in.read() < 0)
|
|
return; // small optimization - avoid buffer creation
|
|
byte[] buf = new byte[4096];
|
|
while (len != 0) {
|
|
int count = len < 0 || buf.length < len ? buf.length : (int) len;
|
|
count = in.read(buf, 0, count);
|
|
if (count < 0) {
|
|
if (len > 0) throw new IOException("unexpected end of stream");
|
|
break;
|
|
}
|
|
if (out != null) out.write(buf, 0, count);
|
|
len -= len > 0 ? count : 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reads the token starting at the current stream position and ending at the first occurrence of
|
|
* the given delimiter byte, in the given encoding.
|
|
*
|
|
* @param in the stream from which the token is read
|
|
* @param delim the byte value which marks the end of the token, or -1 if the token ends at the
|
|
* end of the stream
|
|
* @param enc a character-encoding name
|
|
* @param maxLength the maximum length (in bytes) to read
|
|
* @return the read token, excluding the delimiter
|
|
* @throws UnsupportedEncodingException if the encoding is not supported
|
|
* @throws EOFException if the stream end is reached before a delimiter is found
|
|
* @throws IOException if an IO error occurs, or the maximum length is reached before the token
|
|
* end is reached
|
|
*/
|
|
public static String readToken(InputStream in, int delim, String enc, int maxLength)
|
|
throws IOException {
|
|
// note: we avoid using a ByteArrayOutputStream here because it
|
|
// suffers the overhead of synchronization for each byte written
|
|
int buflen = maxLength < 512 ? maxLength : 512; // start with less
|
|
byte[] buf = new byte[buflen];
|
|
int count = 0;
|
|
int c;
|
|
while ((c = in.read()) != -1 && c != delim) {
|
|
if (count == buflen) { // expand buffer
|
|
if (count == maxLength) throw new IOException("token too large (" + count + ")");
|
|
buflen = maxLength < 2 * buflen ? maxLength : 2 * buflen;
|
|
byte[] expanded = new byte[buflen];
|
|
System.arraycopy(buf, 0, expanded, 0, count);
|
|
buf = expanded;
|
|
}
|
|
buf[count++] = (byte) c;
|
|
}
|
|
if (c < 0 && delim != -1) throw new EOFException("unexpected end of stream");
|
|
return new String(buf, 0, count, enc);
|
|
}
|
|
|
|
/**
|
|
* Reads the ISO-8859-1 encoded string starting at the current stream position and ending at the
|
|
* first occurrence of the LF character.
|
|
*
|
|
* @param in the stream from which the line is read
|
|
* @return the read string, excluding the terminating LF character and (if exists) the CR
|
|
* character immediately preceding it
|
|
* @throws EOFException if the stream end is reached before an LF character is found
|
|
* @throws IOException if an IO error occurs, or the line is longer than 8192 bytes
|
|
* @see #readToken(InputStream, int, String, int)
|
|
*/
|
|
public static String readLine(InputStream in) throws IOException {
|
|
String s = readToken(in, '\n', "ISO8859_1", 8192);
|
|
return s.length() > 0 && s.charAt(s.length() - 1) == '\r' ? s.substring(0, s.length() - 1) : s;
|
|
}
|
|
|
|
/**
|
|
* Reads headers from the given stream. Headers are read according to the RFC, including folded
|
|
* headers, element lists, and multiple headers (which are concatenated into a single element list
|
|
* header). Leading and trailing whitespace is removed.
|
|
*
|
|
* @param in the stream from which the headers are read
|
|
* @return the read headers (possibly empty, if none exist)
|
|
* @throws IOException if an IO error occurs or the headers are malformed or there are more than
|
|
* 100 header lines
|
|
*/
|
|
public static Headers readHeaders(InputStream in) throws IOException {
|
|
Headers headers = new Headers();
|
|
String line;
|
|
String prevLine = "";
|
|
int count = 0;
|
|
while ((line = readLine(in)).length() > 0) {
|
|
int first;
|
|
for (first = 0; first < line.length() && Character.isWhitespace(line.charAt(first)); first++)
|
|
;
|
|
if (first > 0) // unfold header continuation line
|
|
line = prevLine + ' ' + line.substring(first);
|
|
int separator = line.indexOf(':');
|
|
if (separator < 0) throw new IOException("invalid header: \"" + line + "\"");
|
|
String name = line.substring(0, separator);
|
|
String value = line.substring(separator + 1).trim(); // ignore LWS
|
|
Header replaced = headers.replace(name, value);
|
|
// concatenate repeated headers (distinguishing repeated from folded)
|
|
if (replaced != null && first == 0) {
|
|
value = replaced.getValue() + ", " + value;
|
|
line = name + ": " + value;
|
|
headers.replace(name, value);
|
|
}
|
|
prevLine = line;
|
|
if (++count > 100) throw new IOException("too many header lines");
|
|
}
|
|
return headers;
|
|
}
|
|
|
|
/**
|
|
* Matches the given ETag value against the given ETags. A match is found if the given ETag is not
|
|
* null, and either the ETags contain a "*" value, or one of them is identical to the given ETag.
|
|
* If strong comparison is used, tags beginning with the weak ETag prefix "W/" never match. See
|
|
* RFC2616#3.11, RFC2616#13.3.3.
|
|
*
|
|
* @param strong if true, strong comparison is used, otherwise weak comparison is used
|
|
* @param etags the ETags to match against
|
|
* @param etag the ETag to match
|
|
* @return true if the ETag is matched, false otherwise
|
|
*/
|
|
public static boolean match(boolean strong, String[] etags, String etag) {
|
|
if (etag == null || strong && etag.startsWith("W/")) return false;
|
|
for (String e : etags)
|
|
if (e.equals("*") || (e.equals(etag) && !(strong && (e.startsWith("W/"))))) return true;
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Calculates the appropriate response status for the given request and its resource's
|
|
* last-modified time and ETag, based on the conditional headers present in the request.
|
|
*
|
|
* @param req the request
|
|
* @param lastModified the resource's last modified time
|
|
* @param etag the resource's ETag
|
|
* @return the appropriate response status for the request
|
|
*/
|
|
public static int getConditionalStatus(Request req, long lastModified, String etag) {
|
|
Headers headers = req.getHeaders();
|
|
// If-Match
|
|
String header = headers.get("If-Match");
|
|
if (header != null && !match(true, splitElements(header, false), etag)) return 412;
|
|
// If-Unmodified-Since
|
|
Date date = headers.getDate("If-Unmodified-Since");
|
|
if (date != null && lastModified > date.getTime()) return 412;
|
|
// If-Modified-Since
|
|
int status = 200;
|
|
boolean force = false;
|
|
date = headers.getDate("If-Modified-Since");
|
|
if (date != null && date.getTime() <= System.currentTimeMillis()) {
|
|
if (lastModified > date.getTime()) force = true;
|
|
else status = 304;
|
|
}
|
|
// If-None-Match
|
|
header = headers.get("If-None-Match");
|
|
if (header != null) {
|
|
if (match(false, splitElements(header, false), etag)) // RFC7232#3.2: use weak matching
|
|
status = req.getMethod().equals("GET") || req.getMethod().equals("HEAD") ? 304 : 412;
|
|
else force = true;
|
|
}
|
|
return force ? 200 : status;
|
|
}
|
|
|
|
/**
|
|
* Serves a context's contents from a file based resource.
|
|
*
|
|
* <p>The file is located by stripping the given context prefix from the request's path, and
|
|
* appending the result to the given base directory.
|
|
*
|
|
* <p>Missing, forbidden and otherwise invalid files return the appropriate error response.
|
|
* Directories are served as an HTML index page if the virtual host allows one, or a forbidden
|
|
* error otherwise. Files are sent with their corresponding content types, and handle conditional
|
|
* and partial retrievals according to the RFC.
|
|
*
|
|
* @param base the base directory to which the context is mapped
|
|
* @param context the context which is mapped to the base directory
|
|
* @param req the request
|
|
* @param resp the response into which the content is written
|
|
* @return the HTTP status code to return, or 0 if a response was sent
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public static int serveFile(File base, String context, Request req, Response resp)
|
|
throws IOException {
|
|
String relativePath = req.getPath().substring(context.length());
|
|
File file = new File(base, relativePath).getCanonicalFile();
|
|
if (!file.exists() || file.isHidden() || file.getName().startsWith(".")) {
|
|
return 404;
|
|
} else if (!file.canRead() || !file.getPath().startsWith(base.getPath())) { // validate
|
|
return 403;
|
|
} else if (file.isDirectory()) {
|
|
if (relativePath.endsWith("/")) {
|
|
if (!req.getVirtualHost().isAllowGeneratedIndex()) return 403;
|
|
resp.send(200, createIndex(file, req.getPath()));
|
|
} else { // redirect to the normalized directory URL ending with '/'
|
|
resp.redirect(req.getBaseURL() + req.getPath() + "/", true);
|
|
}
|
|
} else if (relativePath.endsWith("/")) {
|
|
return 404; // non-directory ending with slash (File constructor removed it)
|
|
} else {
|
|
serveFileContent(file, req, resp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Serves the contents of a file, with its corresponding content type, last modification time,
|
|
* etc. conditional and partial retrievals are handled according to the RFC.
|
|
*
|
|
* @param file the existing and readable file whose contents are served
|
|
* @param req the request
|
|
* @param resp the response into which the content is written
|
|
* @throws IOException if an error occurs
|
|
*/
|
|
public static void serveFileContent(File file, Request req, Response resp) throws IOException {
|
|
long len = file.length();
|
|
long lastModified = file.lastModified();
|
|
String etag = "W/\"" + lastModified + "\""; // a weak tag based on date
|
|
int status = 200;
|
|
// handle range or conditional request
|
|
long[] range = req.getRange(len);
|
|
if (range == null || len == 0) {
|
|
status = getConditionalStatus(req, lastModified, etag);
|
|
} else {
|
|
String ifRange = req.getHeaders().get("If-Range");
|
|
if (ifRange == null) {
|
|
if (range[0] >= len) status = 416; // unsatisfiable range
|
|
else status = getConditionalStatus(req, lastModified, etag);
|
|
} else if (range[0] >= len) {
|
|
// RFC2616#14.16, 10.4.17: invalid If-Range gets everything
|
|
range = null;
|
|
} else { // send either range or everything
|
|
if (!ifRange.startsWith("\"") && !ifRange.startsWith("W/")) {
|
|
Date date = req.getHeaders().getDate("If-Range");
|
|
if (date != null && lastModified > date.getTime())
|
|
range = null; // modified - send everything
|
|
} else if (!ifRange.equals(etag)) {
|
|
range = null; // modified - send everything
|
|
}
|
|
}
|
|
}
|
|
// send the response
|
|
Headers respHeaders = resp.getHeaders();
|
|
switch (status) {
|
|
case 304: // no other headers or body allowed
|
|
respHeaders.add("ETag", etag);
|
|
respHeaders.add("Vary", "Accept-Encoding");
|
|
respHeaders.add("Last-Modified", formatDate(lastModified));
|
|
resp.sendHeaders(304);
|
|
break;
|
|
case 412:
|
|
resp.sendHeaders(412);
|
|
break;
|
|
case 416:
|
|
respHeaders.add("Content-Range", "bytes */" + len);
|
|
resp.sendHeaders(416);
|
|
break;
|
|
case 200:
|
|
// send OK response
|
|
resp.sendHeaders(
|
|
200,
|
|
len,
|
|
lastModified,
|
|
etag,
|
|
getContentType(file.getName(), "application/octet-stream"),
|
|
range);
|
|
// send body
|
|
InputStream in = new FileInputStream(file);
|
|
try {
|
|
resp.sendBody(in, len, range);
|
|
} finally {
|
|
in.close();
|
|
}
|
|
break;
|
|
default:
|
|
resp.sendHeaders(500); // should never happen
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Serves the contents of a directory as an HTML file index.
|
|
*
|
|
* @param dir the existing and readable directory whose contents are served
|
|
* @param path the displayed base path corresponding to dir
|
|
* @return an HTML string containing the file index for the directory
|
|
*/
|
|
public static String createIndex(File dir, String path) {
|
|
if (!path.endsWith("/")) path += "/";
|
|
// calculate name column width
|
|
int w = 21; // minimum width
|
|
for (String name : dir.list()) if (name.length() > w) w = name.length();
|
|
w += 2; // with room for added slash and space
|
|
// note: we use apache's format, for consistent user experience
|
|
try (Formatter f = new Formatter(Locale.US)) {
|
|
f.format(
|
|
"<!DOCTYPE html>%n"
|
|
+ "<html><head><title>Index of %s</title></head>%n"
|
|
+ "<body><h1>Index of %s</h1>%n"
|
|
+ "<pre> Name%"
|
|
+ (w - 5)
|
|
+ "s Last modified Size<hr>",
|
|
path,
|
|
path,
|
|
"");
|
|
if (path.length() > 1) // add parent link if not root path
|
|
f.format(
|
|
" <a href=\"%s/\">Parent Directory</a>%" + (w + 5) + "s-%n", getParentPath(path), "");
|
|
for (File file : dir.listFiles()) {
|
|
try {
|
|
String name = file.getName() + (file.isDirectory() ? "/" : "");
|
|
String size = file.isDirectory() ? "- " : toSizeApproxString(file.length());
|
|
// properly url-encode the link
|
|
String link = new URI(null, path + name, null).toASCIIString();
|
|
if (!file.isHidden() && !name.startsWith("."))
|
|
f.format(
|
|
" <a href=\"%s\">%s</a>%-"
|
|
+ (w - name.length())
|
|
+ "s‎%td-%<tb-%<tY %<tR%6s%n",
|
|
link,
|
|
name,
|
|
"",
|
|
file.lastModified(),
|
|
size);
|
|
} catch (URISyntaxException ignore) {
|
|
}
|
|
}
|
|
f.format("</pre></body></html>");
|
|
return f.toString();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Starts a stand-alone HTTP server, serving files from disk.
|
|
*
|
|
* @param args the command line arguments
|
|
*/
|
|
// public static void main(String[] args) {
|
|
// try {
|
|
// if (args.length == 0) {
|
|
// System.err.printf("Usage: java [-options] %s <directory> [port]%n" +
|
|
// "To enable SSL: specify options -Djavax.net.ssl.keyStore, " +
|
|
// "-Djavax.net.ssl.keyStorePassword, etc.%n", lc.HTTPServer.class.getName());
|
|
// return;
|
|
// }
|
|
// File dir = new File(args[0]);
|
|
// if (!dir.canRead())
|
|
// throw new FileNotFoundException(dir.getAbsolutePath());
|
|
// int port = args.length < 2 ? 80 : Integer.parseInt(args[1]);
|
|
// // set up server
|
|
// for (File f : Arrays.asList(new File("/etc/mime.types"), new File(dir, ".mime.types")))
|
|
// if (f.exists())
|
|
// addContentTypes(f);
|
|
// lc.HTTPServer server = new lc.HTTPServer(port);
|
|
// if (System.getProperty("javax.net.ssl.keyStore") != null) // enable SSL if configured
|
|
// server.setServerSocketFactory(SSLServerSocketFactory.getDefault());
|
|
// VirtualHost host = server.getVirtualHost(null); // default host
|
|
// host.setAllowGeneratedIndex(true); // with directory index pages
|
|
// host.addContext("/", new FileContextHandler(dir));
|
|
// host.addContext("/api/time", new ContextHandler() {
|
|
// public int serve(Request req, Response resp) throws IOException {
|
|
// long now = System.currentTimeMillis();
|
|
// resp.getHeaders().add("Content-Type", "text/plain");
|
|
// resp.send(200, String.format("%tF %<tT", now));
|
|
// return 0;
|
|
// }
|
|
// });
|
|
// server.start();
|
|
// System.out.println("lc.HTTPServer is listening on port " + port);
|
|
// } catch (Exception e) {
|
|
// System.err.println("error: " + e);
|
|
// }
|
|
// }
|
|
}
|