* When binding to an address and port number, the application can also specify an integer * <i>backlog parameter. This represents the maximum number of incoming TCP connections * which the system will queue internally. Connections are queued while they are waiting to * be accepted by the HttpServer. When the limit is reached, further connections may be * rejected (or possibly ignored) by the underlying TCP implementation. Setting the right * backlog value is a compromise between efficient resource usage in the TCP layer (not setting * it too high) and allowing adequate throughput of incoming requests (not setting it too low). * @since 1.6 */ @jdk.Exported public abstract class HttpServer { /** */ protected HttpServer () { } /** * creates a HttpServer instance which is initially not bound to any local address/port. * The HttpServer is acquired from the currently installed {@link HttpServerProvider} * The server must be bound using {@link #bind(InetSocketAddress,int)} before it can be used. * @throws IOException */ public static HttpServer create () throws IOException { return create (null, 0); } /** * Create a <code>HttpServer instance which will bind to the * specified {@link java.net.InetSocketAddress} (IP address and port number) * * A maximum backlog can also be specified. This is the maximum number of * queued incoming connections to allow on the listening socket. * Queued TCP connections exceeding this limit may be rejected by the TCP implementation. * The HttpServer is acquired from the currently installed {@link HttpServerProvider} * * @param addr the address to listen on, if <code>null then bind() must be called * to set the address * @param backlog the socket backlog. If this value is less than or equal to zero, * then a system default value is used. * @throws BindException if the server cannot bind to the requested address, * or if the server is already bound. * @throws IOException */ public static HttpServer create ( InetSocketAddress addr, int backlog ) throws IOException { HttpServerProvider provider = HttpServerProvider.provider(); return provider.createHttpServer (addr, backlog); } /** * Binds a currently unbound HttpServer to the given address and port number. * A maximum backlog can also be specified. This is the maximum number of * queued incoming connections to allow on the listening socket. * Queued TCP connections exceeding this limit may be rejected by the TCP implementation. * @param addr the address to listen on * @param backlog the socket backlog. If this value is less than or equal to zero, * then a system default value is used. * @throws BindException if the server cannot bind to the requested address or if the server * is already bound. * @throws NullPointerException if addr is <code>null */ public abstract void bind (InetSocketAddress addr, int backlog) throws IOException; /** * Starts this server in a new background thread. The background thread * inherits the priority, thread group and context class loader * of the caller. */ public abstract void start () ; /** * sets this server's {@link java.util.concurrent.Executor} object. An * Executor must be established before {@link #start()} is called. * All HTTP requests are handled in tasks given to the executor. * If this method is not called (before start()) or if it is * called with a <code>null Executor, then * a default implementation is used, which uses the thread * which was created by the {@link #start()} method. * @param executor the Executor to set, or <code>null for default * implementation * @throws IllegalStateException if the server is already started */ public abstract void setExecutor (Executor executor); /** * returns this server's Executor object if one was specified with * {@link #setExecutor(Executor)}, or <code>null if none was * specified. * @return the Executor established for this server or <code>null if not set. */ public abstract Executor getExecutor () ; /** * stops this server by closing the listening socket and disallowing * any new exchanges from being processed. The method will then block * until all current exchange handlers have completed or else when * approximately <i>delay seconds have elapsed (whichever happens * sooner). Then, all open TCP connections are closed, the background * thread created by start() exits, and the method returns. * Once stopped, a HttpServer cannot be re-used. <p> * * @param delay the maximum time in seconds to wait until exchanges have finished. * @throws IllegalArgumentException if delay is less than zero. */ public abstract void stop (int delay); /** * Creates a HttpContext. A HttpContext represents a mapping from a * URI path to a exchange handler on this HttpServer. Once created, all requests * received by the server for the path will be handled by calling * the given handler object. The context is identified by the path, and * can later be removed from the server using this with the {@link #removeContext(String)} method. * <p> * The path specifies the root URI path for this context. The first character of path must be * '/'. <p> * The class overview describes how incoming request URIs are <a href="#mapping_description">mapped * to HttpContext instances. * @param path the root URI path to associate the context with * @param handler the handler to invoke for incoming requests. * @throws IllegalArgumentException if path is invalid, or if a context * already exists for this path * @throws NullPointerException if either path, or handler are <code>null */ public abstract HttpContext createContext (String path, HttpHandler handler) ; /** * Creates a HttpContext without initially specifying a handler. The handler must later be specified using * {@link HttpContext#setHandler(HttpHandler)}. A HttpContext represents a mapping from a * URI path to an exchange handler on this HttpServer. Once created, and when * the handler has been set, all requests * received by the server for the path will be handled by calling * the handler object. The context is identified by the path, and * can later be removed from the server using this with the {@link #removeContext(String)} method. * <p> * The path specifies the root URI path for this context. The first character of path must be * '/'. <p> * The class overview describes how incoming request URIs are <a href="#mapping_description">mapped * to HttpContext instances. * @param path the root URI path to associate the context with * @throws IllegalArgumentException if path is invalid, or if a context * already exists for this path * @throws NullPointerException if path is <code>null */ public abstract HttpContext createContext (String path) ; /** * Removes the context identified by the given path from the server. * Removing a context does not affect exchanges currently being processed * but prevents new ones from being accepted. * @param path the path of the handler to remove * @throws IllegalArgumentException if no handler corresponding to this * path exists. * @throws NullPointerException if path is <code>null */ public abstract void removeContext (String path) throws IllegalArgumentException ; /** * Removes the given context from the server. * Removing a context does not affect exchanges currently being processed * but prevents new ones from being accepted. * @param context the context to remove * @throws NullPointerException if context is <code>null */ public abstract void removeContext (HttpContext context) ; /** * returns the address this server is listening on * @return the address/port number the server is listening on */ public abstract InetSocketAddress getAddress() ; }

/*
 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.sun.net.httpserver;

import java.net.*;
import java.io.*;
import java.nio.*;
import java.security.*;
import java.nio.channels.*;
import java.util.*;
import java.util.concurrent.*;
import javax.net.ssl.*;
import com.sun.net.httpserver.spi.HttpServerProvider;

/**
 * This class implements a simple HTTP server. A HttpServer is bound to an IP address
 * and port number and listens for incoming TCP connections from clients on this address.
 * The sub-class {@link HttpsServer} implements a server which handles HTTPS requests.
 * <p>
 * One or more {@link HttpHandler} objects must be associated with a server
 * in order to process requests. Each such HttpHandler is registered
 * with a root URI path which represents the
 * location of the application or service on this server. The mapping of a handler
 * to a HttpServer is encapsulated by a {@link HttpContext} object. HttpContexts
 * are created by calling {@link #createContext(String,HttpHandler)}.
 * Any request for which no handler can be found is rejected with a 404 response.
 * Management of threads can be done external to this object by providing a
 * {@link java.util.concurrent.Executor} object. If none is provided a default
 * implementation is used.
 * <p>
 * <a name="mapping_description">
 * <b>Mapping request URIs to HttpContext paths

 * When a HTTP request is received,
 * the appropriate HttpContext (and handler) is located by finding the context
 * whose path is the longest matching prefix of the request URI's path.
 * Paths are matched literally, which means that the strings are compared
 * case sensitively, and with no conversion to or from any encoded forms.
 * For example. Given a HttpServer with the following HttpContexts configured.<p>
 * <table >
 * <tr>

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