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/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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 * .
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package org.apache.http.impl.execchain;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.ProtocolException;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpExecutionAware;
import org.apache.http.client.methods.HttpRequestWrapper;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.params.ClientPNames;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.client.utils.URIUtils;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HttpCoreContext;
import org.apache.http.protocol.HttpProcessor;
import org.apache.http.util.Args;

/**
 * Request executor in the request execution chain that is responsible
 * for implementation of HTTP specification requirements.
 * Internally this executor relies on a {@link HttpProcessor} to populate
 * requisite HTTP request headers, process HTTP response headers and update
 * session state in {@link HttpClientContext}.
 * 

* Further responsibilities such as communication with the opposite * endpoint is delegated to the next executor in the request execution * chain. *

* * @since 4.3 */ @Contract(threading = ThreadingBehavior.IMMUTABLE_CONDITIONAL) @SuppressWarnings("deprecation") public class ProtocolExec implements ClientExecChain { private final Log log = LogFactory.getLog(getClass()); private final ClientExecChain requestExecutor; private final HttpProcessor httpProcessor; public ProtocolExec(final ClientExecChain requestExecutor, final HttpProcessor httpProcessor) { Args.notNull(requestExecutor, "HTTP client request executor"); Args.notNull(httpProcessor, "HTTP protocol processor"); this.requestExecutor = requestExecutor; this.httpProcessor = httpProcessor; } void rewriteRequestURI( final HttpRequestWrapper request, final HttpRoute route) throws ProtocolException { final URI uri = request.getURI(); if (uri != null) { try { request.setURI(URIUtils.rewriteURIForRoute(uri, route)); } catch (final URISyntaxException ex) { throw new ProtocolException("Invalid URI: " + uri, ex); } } } @Override public CloseableHttpResponse execute( final HttpRoute route, final HttpRequestWrapper request, final HttpClientContext context, final HttpExecutionAware execAware) throws IOException, HttpException { Args.notNull(route, "HTTP route"); Args.notNull(request, "HTTP request"); Args.notNull(context, "HTTP context"); final HttpRequest original = request.getOriginal(); URI uri = null; if (original instanceof HttpUriRequest) { uri = ((HttpUriRequest) original).getURI(); } else { final String uriString = original.getRequestLine().getUri(); try { uri = URI.create(uriString); } catch (final IllegalArgumentException ex) { if (this.log.isDebugEnabled()) { this.log.debug("Unable to parse '" + uriString + "' as a valid URI; " + "request URI and Host header may be inconsistent", ex); } } } request.setURI(uri); // Re-write request URI if needed rewriteRequestURI(request, route); final HttpParams params = request.getParams(); HttpHost virtualHost = (HttpHost) params.getParameter(ClientPNames.VIRTUAL_HOST); // HTTPCLIENT-1092 - add the port if necessary if (virtualHost != null && virtualHost.getPort() == -1) { final int port = route.getTargetHost().getPort(); if (port != -1) { virtualHost = new HttpHost(virtualHost.getHostName(), port, virtualHost.getSchemeName()); } if (this.log.isDebugEnabled()) { this.log.debug("Using virtual host" + virtualHost); } } HttpHost target = null; if (virtualHost != null) { target = virtualHost; } else { if (uri != null && uri.isAbsolute() && uri.getHost() != null) { target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme()); } } if (target == null) { target = request.getTarget(); } if (target == null) { target = route.getTargetHost(); } // Get user info from the URI if (uri != null) { final String userinfo = uri.getUserInfo(); if (userinfo != null) { CredentialsProvider credsProvider = context.getCredentialsProvider(); if (credsProvider == null) { credsProvider = new BasicCredentialsProvider(); context.setCredentialsProvider(credsProvider); } credsProvider.setCredentials( new AuthScope(target), new UsernamePasswordCredentials(userinfo)); } } // Run request protocol interceptors context.setAttribute(HttpCoreContext.HTTP_TARGET_HOST, target); context.setAttribute(HttpClientContext.HTTP_ROUTE, route); context.setAttribute(HttpCoreContext.HTTP_REQUEST, request); this.httpProcessor.process(request, context); final CloseableHttpResponse response = this.requestExecutor.execute(route, request, context, execAware); try { // Run response protocol interceptors context.setAttribute(HttpCoreContext.HTTP_RESPONSE, response); this.httpProcessor.process(response, context); return response; } catch (final RuntimeException ex) { response.close(); throw ex; } catch (final IOException ex) { response.close(); throw ex; } catch (final HttpException ex) { response.close(); throw ex; } } }




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