mirror of
https://github.com/roytam1/palemoon27.git
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Moonchild
569 lines
25 KiB
Java
569 lines
25 KiB
Java
/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package ch.boye.httpclientandroidlib.impl.execchain;
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import java.io.IOException;
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import java.io.InterruptedIOException;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.TimeUnit;
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import ch.boye.httpclientandroidlib.androidextra.HttpClientAndroidLog;
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/* LogFactory removed by HttpClient for Android script. */
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import ch.boye.httpclientandroidlib.ConnectionReuseStrategy;
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import ch.boye.httpclientandroidlib.HttpClientConnection;
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import ch.boye.httpclientandroidlib.HttpEntity;
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import ch.boye.httpclientandroidlib.HttpEntityEnclosingRequest;
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import ch.boye.httpclientandroidlib.HttpException;
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import ch.boye.httpclientandroidlib.HttpHost;
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import ch.boye.httpclientandroidlib.HttpRequest;
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import ch.boye.httpclientandroidlib.HttpResponse;
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import ch.boye.httpclientandroidlib.annotation.Immutable;
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import ch.boye.httpclientandroidlib.auth.AUTH;
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import ch.boye.httpclientandroidlib.auth.AuthProtocolState;
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import ch.boye.httpclientandroidlib.auth.AuthState;
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import ch.boye.httpclientandroidlib.client.AuthenticationStrategy;
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import ch.boye.httpclientandroidlib.client.NonRepeatableRequestException;
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import ch.boye.httpclientandroidlib.client.UserTokenHandler;
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import ch.boye.httpclientandroidlib.client.config.RequestConfig;
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import ch.boye.httpclientandroidlib.client.methods.CloseableHttpResponse;
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import ch.boye.httpclientandroidlib.client.methods.HttpExecutionAware;
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import ch.boye.httpclientandroidlib.client.methods.HttpRequestWrapper;
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import ch.boye.httpclientandroidlib.client.protocol.HttpClientContext;
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import ch.boye.httpclientandroidlib.client.protocol.RequestClientConnControl;
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import ch.boye.httpclientandroidlib.conn.ConnectionKeepAliveStrategy;
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import ch.boye.httpclientandroidlib.conn.ConnectionRequest;
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import ch.boye.httpclientandroidlib.conn.HttpClientConnectionManager;
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import ch.boye.httpclientandroidlib.conn.routing.BasicRouteDirector;
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import ch.boye.httpclientandroidlib.conn.routing.HttpRoute;
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import ch.boye.httpclientandroidlib.conn.routing.HttpRouteDirector;
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import ch.boye.httpclientandroidlib.conn.routing.RouteTracker;
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import ch.boye.httpclientandroidlib.entity.BufferedHttpEntity;
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import ch.boye.httpclientandroidlib.impl.auth.HttpAuthenticator;
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import ch.boye.httpclientandroidlib.impl.conn.ConnectionShutdownException;
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import ch.boye.httpclientandroidlib.message.BasicHttpRequest;
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import ch.boye.httpclientandroidlib.protocol.HttpCoreContext;
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import ch.boye.httpclientandroidlib.protocol.HttpProcessor;
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import ch.boye.httpclientandroidlib.protocol.HttpRequestExecutor;
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import ch.boye.httpclientandroidlib.protocol.ImmutableHttpProcessor;
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import ch.boye.httpclientandroidlib.protocol.RequestTargetHost;
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import ch.boye.httpclientandroidlib.util.Args;
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import ch.boye.httpclientandroidlib.util.EntityUtils;
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/**
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* The last request executor in the HTTP request execution chain
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* that is responsible for execution of request / response
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* exchanges with the opposite endpoint.
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* This executor will automatically retry the request in case
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* of an authentication challenge by an intermediate proxy or
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* by the target server.
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*
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* @since 4.3
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*/
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@Immutable
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public class MainClientExec implements ClientExecChain {
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public HttpClientAndroidLog log = new HttpClientAndroidLog(getClass());
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private final HttpRequestExecutor requestExecutor;
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private final HttpClientConnectionManager connManager;
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private final ConnectionReuseStrategy reuseStrategy;
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private final ConnectionKeepAliveStrategy keepAliveStrategy;
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private final HttpProcessor proxyHttpProcessor;
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private final AuthenticationStrategy targetAuthStrategy;
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private final AuthenticationStrategy proxyAuthStrategy;
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private final HttpAuthenticator authenticator;
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private final UserTokenHandler userTokenHandler;
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private final HttpRouteDirector routeDirector;
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public MainClientExec(
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final HttpRequestExecutor requestExecutor,
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final HttpClientConnectionManager connManager,
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final ConnectionReuseStrategy reuseStrategy,
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final ConnectionKeepAliveStrategy keepAliveStrategy,
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final AuthenticationStrategy targetAuthStrategy,
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final AuthenticationStrategy proxyAuthStrategy,
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final UserTokenHandler userTokenHandler) {
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Args.notNull(requestExecutor, "HTTP request executor");
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Args.notNull(connManager, "Client connection manager");
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Args.notNull(reuseStrategy, "Connection reuse strategy");
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Args.notNull(keepAliveStrategy, "Connection keep alive strategy");
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Args.notNull(targetAuthStrategy, "Target authentication strategy");
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Args.notNull(proxyAuthStrategy, "Proxy authentication strategy");
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Args.notNull(userTokenHandler, "User token handler");
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this.authenticator = new HttpAuthenticator();
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this.proxyHttpProcessor = new ImmutableHttpProcessor(
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new RequestTargetHost(), new RequestClientConnControl());
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this.routeDirector = new BasicRouteDirector();
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this.requestExecutor = requestExecutor;
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this.connManager = connManager;
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this.reuseStrategy = reuseStrategy;
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this.keepAliveStrategy = keepAliveStrategy;
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this.targetAuthStrategy = targetAuthStrategy;
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this.proxyAuthStrategy = proxyAuthStrategy;
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this.userTokenHandler = userTokenHandler;
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}
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public CloseableHttpResponse execute(
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final HttpRoute route,
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final HttpRequestWrapper request,
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final HttpClientContext context,
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final HttpExecutionAware execAware) throws IOException, HttpException {
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Args.notNull(route, "HTTP route");
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Args.notNull(request, "HTTP request");
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Args.notNull(context, "HTTP context");
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AuthState targetAuthState = context.getTargetAuthState();
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if (targetAuthState == null) {
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targetAuthState = new AuthState();
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context.setAttribute(HttpClientContext.TARGET_AUTH_STATE, targetAuthState);
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}
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AuthState proxyAuthState = context.getProxyAuthState();
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if (proxyAuthState == null) {
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proxyAuthState = new AuthState();
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context.setAttribute(HttpClientContext.PROXY_AUTH_STATE, proxyAuthState);
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}
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if (request instanceof HttpEntityEnclosingRequest) {
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RequestEntityProxy.enhance((HttpEntityEnclosingRequest) request);
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}
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Object userToken = context.getUserToken();
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final ConnectionRequest connRequest = connManager.requestConnection(route, userToken);
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if (execAware != null) {
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if (execAware.isAborted()) {
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connRequest.cancel();
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throw new RequestAbortedException("Request aborted");
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} else {
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execAware.setCancellable(connRequest);
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}
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}
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final RequestConfig config = context.getRequestConfig();
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final HttpClientConnection managedConn;
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try {
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final int timeout = config.getConnectionRequestTimeout();
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managedConn = connRequest.get(timeout > 0 ? timeout : 0, TimeUnit.MILLISECONDS);
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} catch(final InterruptedException interrupted) {
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Thread.currentThread().interrupt();
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throw new RequestAbortedException("Request aborted", interrupted);
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} catch(final ExecutionException ex) {
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Throwable cause = ex.getCause();
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if (cause == null) {
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cause = ex;
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}
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throw new RequestAbortedException("Request execution failed", cause);
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}
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context.setAttribute(HttpCoreContext.HTTP_CONNECTION, managedConn);
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if (config.isStaleConnectionCheckEnabled()) {
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// validate connection
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if (managedConn.isOpen()) {
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this.log.debug("Stale connection check");
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if (managedConn.isStale()) {
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this.log.debug("Stale connection detected");
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managedConn.close();
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}
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}
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}
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final ConnectionHolder connHolder = new ConnectionHolder(this.log, this.connManager, managedConn);
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try {
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if (execAware != null) {
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execAware.setCancellable(connHolder);
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}
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HttpResponse response;
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for (int execCount = 1;; execCount++) {
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if (execCount > 1 && !RequestEntityProxy.isRepeatable(request)) {
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throw new NonRepeatableRequestException("Cannot retry request " +
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"with a non-repeatable request entity.");
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}
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if (execAware != null && execAware.isAborted()) {
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throw new RequestAbortedException("Request aborted");
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}
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if (!managedConn.isOpen()) {
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this.log.debug("Opening connection " + route);
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try {
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establishRoute(proxyAuthState, managedConn, route, request, context);
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} catch (final TunnelRefusedException ex) {
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if (this.log.isDebugEnabled()) {
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this.log.debug(ex.getMessage());
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}
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response = ex.getResponse();
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break;
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}
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}
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final int timeout = config.getSocketTimeout();
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if (timeout >= 0) {
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managedConn.setSocketTimeout(timeout);
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}
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if (execAware != null && execAware.isAborted()) {
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throw new RequestAbortedException("Request aborted");
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}
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if (this.log.isDebugEnabled()) {
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this.log.debug("Executing request " + request.getRequestLine());
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}
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if (!request.containsHeader(AUTH.WWW_AUTH_RESP)) {
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if (this.log.isDebugEnabled()) {
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this.log.debug("Target auth state: " + targetAuthState.getState());
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}
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this.authenticator.generateAuthResponse(request, targetAuthState, context);
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}
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if (!request.containsHeader(AUTH.PROXY_AUTH_RESP) && !route.isTunnelled()) {
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if (this.log.isDebugEnabled()) {
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this.log.debug("Proxy auth state: " + proxyAuthState.getState());
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}
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this.authenticator.generateAuthResponse(request, proxyAuthState, context);
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}
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response = requestExecutor.execute(request, managedConn, context);
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// The connection is in or can be brought to a re-usable state.
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if (reuseStrategy.keepAlive(response, context)) {
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// Set the idle duration of this connection
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final long duration = keepAliveStrategy.getKeepAliveDuration(response, context);
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if (this.log.isDebugEnabled()) {
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final String s;
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if (duration > 0) {
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s = "for " + duration + " " + TimeUnit.MILLISECONDS;
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} else {
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s = "indefinitely";
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}
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this.log.debug("Connection can be kept alive " + s);
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}
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connHolder.setValidFor(duration, TimeUnit.MILLISECONDS);
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connHolder.markReusable();
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} else {
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connHolder.markNonReusable();
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}
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if (needAuthentication(
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targetAuthState, proxyAuthState, route, response, context)) {
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// Make sure the response body is fully consumed, if present
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final HttpEntity entity = response.getEntity();
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if (connHolder.isReusable()) {
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EntityUtils.consume(entity);
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} else {
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managedConn.close();
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if (proxyAuthState.getState() == AuthProtocolState.SUCCESS
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&& proxyAuthState.getAuthScheme() != null
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&& proxyAuthState.getAuthScheme().isConnectionBased()) {
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this.log.debug("Resetting proxy auth state");
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proxyAuthState.reset();
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}
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if (targetAuthState.getState() == AuthProtocolState.SUCCESS
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&& targetAuthState.getAuthScheme() != null
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&& targetAuthState.getAuthScheme().isConnectionBased()) {
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this.log.debug("Resetting target auth state");
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targetAuthState.reset();
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}
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}
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// discard previous auth headers
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final HttpRequest original = request.getOriginal();
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if (!original.containsHeader(AUTH.WWW_AUTH_RESP)) {
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request.removeHeaders(AUTH.WWW_AUTH_RESP);
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}
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if (!original.containsHeader(AUTH.PROXY_AUTH_RESP)) {
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request.removeHeaders(AUTH.PROXY_AUTH_RESP);
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}
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} else {
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break;
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}
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}
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if (userToken == null) {
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userToken = userTokenHandler.getUserToken(context);
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context.setAttribute(HttpClientContext.USER_TOKEN, userToken);
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}
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if (userToken != null) {
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connHolder.setState(userToken);
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}
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// check for entity, release connection if possible
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final HttpEntity entity = response.getEntity();
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if (entity == null || !entity.isStreaming()) {
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// connection not needed and (assumed to be) in re-usable state
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connHolder.releaseConnection();
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return new HttpResponseProxy(response, null);
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} else {
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return new HttpResponseProxy(response, connHolder);
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}
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} catch (final ConnectionShutdownException ex) {
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final InterruptedIOException ioex = new InterruptedIOException(
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"Connection has been shut down");
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ioex.initCause(ex);
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throw ioex;
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} catch (final HttpException ex) {
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connHolder.abortConnection();
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throw ex;
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} catch (final IOException ex) {
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connHolder.abortConnection();
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throw ex;
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} catch (final RuntimeException ex) {
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connHolder.abortConnection();
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throw ex;
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}
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}
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/**
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* Establishes the target route.
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*/
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void establishRoute(
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final AuthState proxyAuthState,
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final HttpClientConnection managedConn,
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final HttpRoute route,
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final HttpRequest request,
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final HttpClientContext context) throws HttpException, IOException {
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final RequestConfig config = context.getRequestConfig();
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final int timeout = config.getConnectTimeout();
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final RouteTracker tracker = new RouteTracker(route);
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int step;
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do {
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final HttpRoute fact = tracker.toRoute();
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step = this.routeDirector.nextStep(route, fact);
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switch (step) {
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case HttpRouteDirector.CONNECT_TARGET:
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this.connManager.connect(
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managedConn,
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route,
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timeout > 0 ? timeout : 0,
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context);
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tracker.connectTarget(route.isSecure());
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break;
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case HttpRouteDirector.CONNECT_PROXY:
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this.connManager.connect(
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managedConn,
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route,
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timeout > 0 ? timeout : 0,
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context);
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final HttpHost proxy = route.getProxyHost();
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tracker.connectProxy(proxy, false);
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break;
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case HttpRouteDirector.TUNNEL_TARGET: {
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final boolean secure = createTunnelToTarget(
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proxyAuthState, managedConn, route, request, context);
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this.log.debug("Tunnel to target created.");
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tracker.tunnelTarget(secure);
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} break;
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case HttpRouteDirector.TUNNEL_PROXY: {
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// The most simple example for this case is a proxy chain
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// of two proxies, where P1 must be tunnelled to P2.
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// route: Source -> P1 -> P2 -> Target (3 hops)
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// fact: Source -> P1 -> Target (2 hops)
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final int hop = fact.getHopCount()-1; // the hop to establish
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final boolean secure = createTunnelToProxy(route, hop, context);
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this.log.debug("Tunnel to proxy created.");
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tracker.tunnelProxy(route.getHopTarget(hop), secure);
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} break;
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case HttpRouteDirector.LAYER_PROTOCOL:
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this.connManager.upgrade(managedConn, route, context);
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tracker.layerProtocol(route.isSecure());
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break;
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case HttpRouteDirector.UNREACHABLE:
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throw new HttpException("Unable to establish route: " +
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"planned = " + route + "; current = " + fact);
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case HttpRouteDirector.COMPLETE:
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this.connManager.routeComplete(managedConn, route, context);
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break;
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default:
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throw new IllegalStateException("Unknown step indicator "
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+ step + " from RouteDirector.");
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}
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} while (step > HttpRouteDirector.COMPLETE);
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}
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/**
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* Creates a tunnel to the target server.
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* The connection must be established to the (last) proxy.
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* A CONNECT request for tunnelling through the proxy will
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* be created and sent, the response received and checked.
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* This method does <i>not</i> update the connection with
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* information about the tunnel, that is left to the caller.
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*/
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private boolean createTunnelToTarget(
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final AuthState proxyAuthState,
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final HttpClientConnection managedConn,
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final HttpRoute route,
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final HttpRequest request,
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final HttpClientContext context) throws HttpException, IOException {
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final RequestConfig config = context.getRequestConfig();
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final int timeout = config.getConnectTimeout();
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final HttpHost target = route.getTargetHost();
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final HttpHost proxy = route.getProxyHost();
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HttpResponse response = null;
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final String authority = target.toHostString();
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final HttpRequest connect = new BasicHttpRequest("CONNECT", authority, request.getProtocolVersion());
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this.requestExecutor.preProcess(connect, this.proxyHttpProcessor, context);
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while (response == null) {
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if (!managedConn.isOpen()) {
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this.connManager.connect(
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managedConn,
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route,
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timeout > 0 ? timeout : 0,
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context);
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}
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connect.removeHeaders(AUTH.PROXY_AUTH_RESP);
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this.authenticator.generateAuthResponse(connect, proxyAuthState, context);
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response = this.requestExecutor.execute(connect, managedConn, context);
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final int status = response.getStatusLine().getStatusCode();
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if (status < 200) {
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throw new HttpException("Unexpected response to CONNECT request: " +
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response.getStatusLine());
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}
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if (config.isAuthenticationEnabled()) {
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if (this.authenticator.isAuthenticationRequested(proxy, response,
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this.proxyAuthStrategy, proxyAuthState, context)) {
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if (this.authenticator.handleAuthChallenge(proxy, response,
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this.proxyAuthStrategy, proxyAuthState, context)) {
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// Retry request
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if (this.reuseStrategy.keepAlive(response, context)) {
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this.log.debug("Connection kept alive");
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// Consume response content
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final HttpEntity entity = response.getEntity();
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EntityUtils.consume(entity);
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} else {
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managedConn.close();
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}
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response = null;
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}
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}
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}
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}
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final int status = response.getStatusLine().getStatusCode();
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if (status > 299) {
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// Buffer response content
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final HttpEntity entity = response.getEntity();
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if (entity != null) {
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response.setEntity(new BufferedHttpEntity(entity));
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}
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managedConn.close();
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throw new TunnelRefusedException("CONNECT refused by proxy: " +
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response.getStatusLine(), response);
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}
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|
|
// How to decide on security of the tunnelled connection?
|
|
// The socket factory knows only about the segment to the proxy.
|
|
// Even if that is secure, the hop to the target may be insecure.
|
|
// Leave it to derived classes, consider insecure by default here.
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Creates a tunnel to an intermediate proxy.
|
|
* This method is <i>not</i> implemented in this class.
|
|
* It just throws an exception here.
|
|
*/
|
|
private boolean createTunnelToProxy(
|
|
final HttpRoute route,
|
|
final int hop,
|
|
final HttpClientContext context) throws HttpException {
|
|
|
|
// Have a look at createTunnelToTarget and replicate the parts
|
|
// you need in a custom derived class. If your proxies don't require
|
|
// authentication, it is not too hard. But for the stock version of
|
|
// HttpClient, we cannot make such simplifying assumptions and would
|
|
// have to include proxy authentication code. The HttpComponents team
|
|
// is currently not in a position to support rarely used code of this
|
|
// complexity. Feel free to submit patches that refactor the code in
|
|
// createTunnelToTarget to facilitate re-use for proxy tunnelling.
|
|
|
|
throw new HttpException("Proxy chains are not supported.");
|
|
}
|
|
|
|
private boolean needAuthentication(
|
|
final AuthState targetAuthState,
|
|
final AuthState proxyAuthState,
|
|
final HttpRoute route,
|
|
final HttpResponse response,
|
|
final HttpClientContext context) {
|
|
final RequestConfig config = context.getRequestConfig();
|
|
if (config.isAuthenticationEnabled()) {
|
|
HttpHost target = context.getTargetHost();
|
|
if (target == null) {
|
|
target = route.getTargetHost();
|
|
}
|
|
if (target.getPort() < 0) {
|
|
target = new HttpHost(
|
|
target.getHostName(),
|
|
route.getTargetHost().getPort(),
|
|
target.getSchemeName());
|
|
}
|
|
final boolean targetAuthRequested = this.authenticator.isAuthenticationRequested(
|
|
target, response, this.targetAuthStrategy, targetAuthState, context);
|
|
|
|
HttpHost proxy = route.getProxyHost();
|
|
// if proxy is not set use target host instead
|
|
if (proxy == null) {
|
|
proxy = route.getTargetHost();
|
|
}
|
|
final boolean proxyAuthRequested = this.authenticator.isAuthenticationRequested(
|
|
proxy, response, this.proxyAuthStrategy, proxyAuthState, context);
|
|
|
|
if (targetAuthRequested) {
|
|
return this.authenticator.handleAuthChallenge(target, response,
|
|
this.targetAuthStrategy, targetAuthState, context);
|
|
}
|
|
if (proxyAuthRequested) {
|
|
return this.authenticator.handleAuthChallenge(proxy, response,
|
|
this.proxyAuthStrategy, proxyAuthState, context);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
}
|