HttpClient是一個接口，定義了連接和訪問規范。

/** $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/client/HttpClient.java $* $Revision: 676020 $* $Date: 2008-07-11 09:38:49 -0700 (Fri, 11 Jul 2008) $** ====================================================================* 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* information on the Apache Software Foundation, please see* <http://www.apache.org/>.**/package org.apache.http.client;import java.io.IOException;import org.apache.http.HttpHost; import org.apache.http.HttpRequest; import org.apache.http.HttpResponse; import org.apache.http.params.HttpParams; import org.apache.http.protocol.HttpContext; import org.apache.http.client.methods.HttpUriRequest; import org.apache.http.conn.ClientConnectionManager;/*** Interface for an HTTP client.* HTTP clients encapsulate a smorgasbord of objects required to* execute HTTP requests while handling cookies, authentication,* connection management, and other features.* Thread safety of HTTP clients depends on the implementation* and configuration of the specific client.** @author <a href="mailto:rolandw at apache.org">Roland Weber</a>*** <!-- empty lines to avoid svn diff problems -->* @version $Revision: 676020 $** @since 4.0*/ public interface HttpClient {/*** Obtains the parameters for this client.* These parameters will become defaults for all requests being* executed with this client, and for the parameters of* dependent objects in this client.** @return the default parameters*/HttpParams getParams();/*** Obtains the connection manager used by this client.** @return the connection manager*/ClientConnectionManager getConnectionManager();/*** Executes a request using the default context.** @param request the request to execute** @return the response to the request. This is always a final response,* never an intermediate response with an 1xx status code.* Whether redirects or authentication challenges will be returned* or handled automatically depends on the implementation and* configuration of this client.* @throws IOException in case of a problem or the connection was aborted* @throws ClientProtocolException in case of an http protocol error*/HttpResponse execute(HttpUriRequest request)throws IOException, ClientProtocolException;/*** Executes a request using the given context.* The route to the target will be determined by the HTTP client.** @param request the request to execute* @param context the context to use for the execution, or* <code>null</code> to use the default context** @return the response to the request. This is always a final response,* never an intermediate response with an 1xx status code.* Whether redirects or authentication challenges will be returned* or handled automatically depends on the implementation and* configuration of this client.* @throws IOException in case of a problem or the connection was aborted* @throws ClientProtocolException in case of an http protocol error*/HttpResponse execute(HttpUriRequest request, HttpContext context)throws IOException, ClientProtocolException;/*** Executes a request to the target using the default context.** @param target the target host for the request.* Implementations may accept <code>null</code>* if they can still determine a route, for example* to a default target or by inspecting the request.* @param request the request to execute** @return the response to the request. This is always a final response,* never an intermediate response with an 1xx status code.* Whether redirects or authentication challenges will be returned* or handled automatically depends on the implementation and* configuration of this client.* @throws IOException in case of a problem or the connection was aborted* @throws ClientProtocolException in case of an http protocol error*/HttpResponse execute(HttpHost target, HttpRequest request)throws IOException, ClientProtocolException;/*** Executes a request to the target using the given context.** @param target the target host for the request.* Implementations may accept <code>null</code>* if they can still determine a route, for example* to a default target or by inspecting the request.* @param request the request to execute* @param context the context to use for the execution, or* <code>null</code> to use the default context** @return the response to the request. This is always a final response,* never an intermediate response with an 1xx status code.* Whether redirects or authentication challenges will be returned* or handled automatically depends on the implementation and* configuration of this client.* @throws IOException in case of a problem or the connection was aborted* @throws ClientProtocolException in case of an http protocol error*/HttpResponse execute(HttpHost target, HttpRequest request,HttpContext context)throws IOException, ClientProtocolException;/*** Executes a request using the default context and processes the* response using the given response handler.** @param request the request to execute* @param responseHandler the response handler** @return the response object as generated by the response handler.* @throws IOException in case of a problem or the connection was aborted* @throws ClientProtocolException in case of an http protocol error*/<T> T execute(HttpUriRequest request, ResponseHandler<? extends T> responseHandler)throws IOException, ClientProtocolException;/*** Executes a request using the given context and processes the* response using the given response handler.** @param request the request to execute* @param responseHandler the response handler** @return the response object as generated by the response handler.* @throws IOException in case of a problem or the connection was aborted* @throws ClientProtocolException in case of an http protocol error*/<T> T execute(HttpUriRequest request, ResponseHandler<? extends T> responseHandler,HttpContext context)throws IOException, ClientProtocolException;/*** Executes a request to the target using the default context and * processes the response using the given response handler.** @param target the target host for the request.* Implementations may accept <code>null</code>* if they can still determine a route, for example* to a default target or by inspecting the request.* @param request the request to execute* @param responseHandler the response handler** @return the response object as generated by the response handler.* @throws IOException in case of a problem or the connection was aborted* @throws ClientProtocolException in case of an http protocol error*/<T> T execute(HttpHost target, HttpRequest request,ResponseHandler<? extends T> responseHandler)throws IOException, ClientProtocolException;/*** Executes a request to the target using the given context and * processes the response using the given response handler.** @param target the target host for the request.* Implementations may accept <code>null</code>* if they can still determine a route, for example* to a default target or by inspecting the request.* @param request the request to execute* @param responseHandler the response handler* @param context the context to use for the execution, or* <code>null</code> to use the default context** @return the response object as generated by the response handler.* @throws IOException in case of a problem or the connection was aborted* @throws ClientProtocolException in case of an http protocol error*/<T> T execute(HttpHost target, HttpRequest request,ResponseHandler<? extends T> responseHandler, HttpContext context)throws IOException, ClientProtocolException;} // interface HttpClient View Code

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AbstractHttpClient?是一個實現了HttpClient接口的抽象類。

/** $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/impl/client/AbstractHttpClient.java $* $Revision: 677250 $* $Date: 2008-07-16 04:45:47 -0700 (Wed, 16 Jul 2008) $** ====================================================================* 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* information on the Apache Software Foundation, please see* <http://www.apache.org/>.**/package org.apache.http.impl.client;import java.io.IOException; import java.net.URI; import java.lang.reflect.UndeclaredThrowableException;import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.http.ConnectionReuseStrategy; import org.apache.http.HttpException; import org.apache.http.HttpHost; import org.apache.http.HttpRequest; import org.apache.http.HttpRequestInterceptor; import org.apache.http.HttpResponse; import org.apache.http.HttpResponseInterceptor; import org.apache.http.HttpEntity; import org.apache.http.auth.AuthSchemeRegistry; import org.apache.http.client.AuthenticationHandler; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.RequestDirector; import org.apache.http.client.ResponseHandler; import org.apache.http.client.CookieStore; import org.apache.http.client.CredentialsProvider; import org.apache.http.client.HttpClient; import org.apache.http.client.HttpRequestRetryHandler; import org.apache.http.client.RedirectHandler; import org.apache.http.client.UserTokenHandler; import org.apache.http.client.methods.HttpUriRequest; import org.apache.http.conn.ClientConnectionManager; import org.apache.http.conn.ConnectionKeepAliveStrategy; import org.apache.http.conn.routing.HttpRoutePlanner; import org.apache.http.cookie.CookieSpecRegistry; import org.apache.http.params.HttpParams; import org.apache.http.protocol.BasicHttpProcessor; import org.apache.http.protocol.DefaultedHttpContext; import org.apache.http.protocol.HttpContext; import org.apache.http.protocol.HttpProcessor; import org.apache.http.protocol.HttpRequestExecutor;/*** Convenience base class for HTTP client implementations.** @author <a href="mailto:rolandw at apache.org">Roland Weber</a>* @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>** <!-- empty lines to avoid svn diff problems -->* @version $Revision: 677250 $** @since 4.0*/ public abstract class AbstractHttpClient implements HttpClient {private final Log log = LogFactory.getLog(getClass());/** The parameters. */private HttpParams defaultParams;/** The request executor. */private HttpRequestExecutor requestExec;/** The connection manager. */private ClientConnectionManager connManager;/** The connection re-use strategy. */private ConnectionReuseStrategy reuseStrategy;/** The connection keep-alive strategy. */private ConnectionKeepAliveStrategy keepAliveStrategy;/** The cookie spec registry. */private CookieSpecRegistry supportedCookieSpecs;/** The authentication scheme registry. */private AuthSchemeRegistry supportedAuthSchemes;/** The HTTP processor. */private BasicHttpProcessor httpProcessor;/** The request retry handler. */private HttpRequestRetryHandler retryHandler;/** The redirect handler. */private RedirectHandler redirectHandler;/** The target authentication handler. */private AuthenticationHandler targetAuthHandler;/** The proxy authentication handler. */private AuthenticationHandler proxyAuthHandler;/** The cookie store. */private CookieStore cookieStore;/** The credentials provider. */private CredentialsProvider credsProvider;/** The route planner. */private HttpRoutePlanner routePlanner;/** The user token handler. */private UserTokenHandler userTokenHandler;/*** Creates a new HTTP client.** @param conman the connection manager* @param params the parameters*/protected AbstractHttpClient(final ClientConnectionManager conman,final HttpParams params) {defaultParams = params;connManager = conman;} // constructorprotected abstract HttpParams createHttpParams();protected abstract HttpContext createHttpContext();protected abstract HttpRequestExecutor createRequestExecutor();protected abstract ClientConnectionManager createClientConnectionManager();protected abstract AuthSchemeRegistry createAuthSchemeRegistry();protected abstract CookieSpecRegistry createCookieSpecRegistry();protected abstract ConnectionReuseStrategy createConnectionReuseStrategy();protected abstract ConnectionKeepAliveStrategy createConnectionKeepAliveStrategy();protected abstract BasicHttpProcessor createHttpProcessor();protected abstract HttpRequestRetryHandler createHttpRequestRetryHandler();protected abstract RedirectHandler createRedirectHandler();protected abstract AuthenticationHandler createTargetAuthenticationHandler();protected abstract AuthenticationHandler createProxyAuthenticationHandler();protected abstract CookieStore createCookieStore();protected abstract CredentialsProvider createCredentialsProvider();protected abstract HttpRoutePlanner createHttpRoutePlanner();protected abstract UserTokenHandler createUserTokenHandler();// non-javadoc, see interface HttpClientpublic synchronized final HttpParams getParams() {if (defaultParams == null) {defaultParams = createHttpParams();}return defaultParams;}/*** Replaces the parameters.* The implementation here does not update parameters of dependent objects.** @param params the new default parameters*/public synchronized void setParams(HttpParams params) {defaultParams = params;}public synchronized final ClientConnectionManager getConnectionManager() {if (connManager == null) {connManager = createClientConnectionManager();}return connManager;}public synchronized final HttpRequestExecutor getRequestExecutor() {if (requestExec == null) {requestExec = createRequestExecutor();}return requestExec;}public synchronized final AuthSchemeRegistry getAuthSchemes() {if (supportedAuthSchemes == null) {supportedAuthSchemes = createAuthSchemeRegistry();}return supportedAuthSchemes;}public synchronized void setAuthSchemes(final AuthSchemeRegistry authSchemeRegistry) {supportedAuthSchemes = authSchemeRegistry;}public synchronized final CookieSpecRegistry getCookieSpecs() {if (supportedCookieSpecs == null) {supportedCookieSpecs = createCookieSpecRegistry();}return supportedCookieSpecs;}public synchronized void setCookieSpecs(final CookieSpecRegistry cookieSpecRegistry) {supportedCookieSpecs = cookieSpecRegistry;}public synchronized final ConnectionReuseStrategy getConnectionReuseStrategy() {if (reuseStrategy == null) {reuseStrategy = createConnectionReuseStrategy();}return reuseStrategy;}public synchronized void setReuseStrategy(final ConnectionReuseStrategy reuseStrategy) {this.reuseStrategy = reuseStrategy;}public synchronized final ConnectionKeepAliveStrategy getConnectionKeepAliveStrategy() {if (keepAliveStrategy == null) {keepAliveStrategy = createConnectionKeepAliveStrategy();}return keepAliveStrategy;}public synchronized void setKeepAliveStrategy(final ConnectionKeepAliveStrategy keepAliveStrategy) {this.keepAliveStrategy = keepAliveStrategy;}public synchronized final HttpRequestRetryHandler getHttpRequestRetryHandler() {if (retryHandler == null) {retryHandler = createHttpRequestRetryHandler();}return retryHandler;}public synchronized void setHttpRequestRetryHandler(final HttpRequestRetryHandler retryHandler) {this.retryHandler = retryHandler;}public synchronized final RedirectHandler getRedirectHandler() {if (redirectHandler == null) {redirectHandler = createRedirectHandler();}return redirectHandler;}public synchronized void setRedirectHandler(final RedirectHandler redirectHandler) {this.redirectHandler = redirectHandler;}public synchronized final AuthenticationHandler getTargetAuthenticationHandler() {if (targetAuthHandler == null) {targetAuthHandler = createTargetAuthenticationHandler();}return targetAuthHandler;}public synchronized void setTargetAuthenticationHandler(final AuthenticationHandler targetAuthHandler) {this.targetAuthHandler = targetAuthHandler;}public synchronized final AuthenticationHandler getProxyAuthenticationHandler() {if (proxyAuthHandler == null) {proxyAuthHandler = createProxyAuthenticationHandler();}return proxyAuthHandler;}public synchronized void setProxyAuthenticationHandler(final AuthenticationHandler proxyAuthHandler) {this.proxyAuthHandler = proxyAuthHandler;}public synchronized final CookieStore getCookieStore() {if (cookieStore == null) {cookieStore = createCookieStore();}return cookieStore;}public synchronized void setCookieStore(final CookieStore cookieStore) {this.cookieStore = cookieStore;}public synchronized final CredentialsProvider getCredentialsProvider() {if (credsProvider == null) {credsProvider = createCredentialsProvider();}return credsProvider;}public synchronized void setCredentialsProvider(final CredentialsProvider credsProvider) {this.credsProvider = credsProvider;}public synchronized final HttpRoutePlanner getRoutePlanner() {if (this.routePlanner == null) {this.routePlanner = createHttpRoutePlanner();}return this.routePlanner;}public synchronized void setRoutePlanner(final HttpRoutePlanner routePlanner) {this.routePlanner = routePlanner;}public synchronized final UserTokenHandler getUserTokenHandler() {if (this.userTokenHandler == null) {this.userTokenHandler = createUserTokenHandler();}return this.userTokenHandler;}public synchronized void setUserTokenHandler(final UserTokenHandler userTokenHandler) {this.userTokenHandler = userTokenHandler;}protected synchronized final BasicHttpProcessor getHttpProcessor() {if (httpProcessor == null) {httpProcessor = createHttpProcessor();}return httpProcessor;}public synchronized void addResponseInterceptor(final HttpResponseInterceptor itcp) {getHttpProcessor().addInterceptor(itcp);}public synchronized void addResponseInterceptor(final HttpResponseInterceptor itcp, int index) {getHttpProcessor().addInterceptor(itcp, index);}public synchronized HttpResponseInterceptor getResponseInterceptor(int index) {return getHttpProcessor().getResponseInterceptor(index);}public synchronized int getResponseInterceptorCount() {return getHttpProcessor().getResponseInterceptorCount();}public synchronized void clearResponseInterceptors() {getHttpProcessor().clearResponseInterceptors();}public void removeResponseInterceptorByClass(Class<? extends HttpResponseInterceptor> clazz) {getHttpProcessor().removeResponseInterceptorByClass(clazz);}public synchronized void addRequestInterceptor(final HttpRequestInterceptor itcp) {getHttpProcessor().addInterceptor(itcp);}public synchronized void addRequestInterceptor(final HttpRequestInterceptor itcp, int index) {getHttpProcessor().addInterceptor(itcp, index);}public synchronized HttpRequestInterceptor getRequestInterceptor(int index) {return getHttpProcessor().getRequestInterceptor(index);}public synchronized int getRequestInterceptorCount() {return getHttpProcessor().getRequestInterceptorCount();}public synchronized void clearRequestInterceptors() {getHttpProcessor().clearRequestInterceptors();}public void removeRequestInterceptorByClass(Class<? extends HttpRequestInterceptor> clazz) {getHttpProcessor().removeRequestInterceptorByClass(clazz);}// non-javadoc, see interface HttpClientpublic final HttpResponse execute(HttpUriRequest request)throws IOException, ClientProtocolException {return execute(request, (HttpContext) null);}/*** Maps to {@link HttpClient#execute(HttpHost,HttpRequest,HttpContext)* execute(target, request, context)}.* The target is determined from the URI of the request.** @param request the request to execute* @param context the request-specific execution context,* or <code>null</code> to use a default context*/public final HttpResponse execute(HttpUriRequest request,HttpContext context)throws IOException, ClientProtocolException {if (request == null) {throw new IllegalArgumentException("Request must not be null.");}return execute(determineTarget(request), request, context);}private HttpHost determineTarget(HttpUriRequest request) {// A null target may be acceptable if there is a default target.// Otherwise, the null target is detected in the director.HttpHost target = null;URI requestURI = request.getURI();if (requestURI.isAbsolute()) {target = new HttpHost(requestURI.getHost(),requestURI.getPort(),requestURI.getScheme());}return target;}// non-javadoc, see interface HttpClientpublic final HttpResponse execute(HttpHost target, HttpRequest request)throws IOException, ClientProtocolException {return execute(target, request, (HttpContext) null);}// non-javadoc, see interface HttpClientpublic final HttpResponse execute(HttpHost target, HttpRequest request,HttpContext context)throws IOException, ClientProtocolException {if (request == null) {throw new IllegalArgumentException("Request must not be null.");}// a null target may be acceptable, this depends on the route planner// a null context is acceptable, default context created below HttpContext execContext = null;RequestDirector director = null;// Initialize the request execution context making copies of // all shared objects that are potentially threading unsafe.synchronized (this) {HttpContext defaultContext = createHttpContext();if (context == null) {execContext = defaultContext;} else {execContext = new DefaultedHttpContext(context, defaultContext);}// Create a director for this requestdirector = createClientRequestDirector(getRequestExecutor(),getConnectionManager(),getConnectionReuseStrategy(),getConnectionKeepAliveStrategy(),getRoutePlanner(),getHttpProcessor().copy(),getHttpRequestRetryHandler(),getRedirectHandler(),getTargetAuthenticationHandler(),getProxyAuthenticationHandler(),getUserTokenHandler(),determineParams(request));}try {return director.execute(target, request, execContext);} catch(HttpException httpException) {throw new ClientProtocolException(httpException);}} // executeprotected RequestDirector createClientRequestDirector(final HttpRequestExecutor requestExec,final ClientConnectionManager conman,final ConnectionReuseStrategy reustrat,final ConnectionKeepAliveStrategy kastrat,final HttpRoutePlanner rouplan,final HttpProcessor httpProcessor,final HttpRequestRetryHandler retryHandler,final RedirectHandler redirectHandler,final AuthenticationHandler targetAuthHandler,final AuthenticationHandler proxyAuthHandler,final UserTokenHandler stateHandler,final HttpParams params) {return new DefaultRequestDirector(requestExec,conman,reustrat,kastrat,rouplan,httpProcessor,retryHandler,redirectHandler,targetAuthHandler,proxyAuthHandler,stateHandler,params);}/*** Obtains parameters for executing a request.* The default implementation in this class creates a new* {@link ClientParamsStack} from the request parameters* and the client parameters.* <br/>* This method is called by the default implementation of* {@link #execute(HttpHost,HttpRequest,HttpContext)}* to obtain the parameters for the* {@link DefaultRequestDirector}.** @param req the request that will be executed** @return the parameters to use*/protected HttpParams determineParams(HttpRequest req) {return new ClientParamsStack(null, getParams(), req.getParams(), null);}// non-javadoc, see interface HttpClientpublic <T> T execute(final HttpUriRequest request, final ResponseHandler<? extends T> responseHandler) throws IOException, ClientProtocolException {return execute(request, responseHandler, null);}// non-javadoc, see interface HttpClientpublic <T> T execute(final HttpUriRequest request,final ResponseHandler<? extends T> responseHandler, final HttpContext context)throws IOException, ClientProtocolException {HttpHost target = determineTarget(request);return execute(target, request, responseHandler, context);}// non-javadoc, see interface HttpClientpublic <T> T execute(final HttpHost target, final HttpRequest request,final ResponseHandler<? extends T> responseHandler) throws IOException, ClientProtocolException {return execute(target, request, responseHandler, null);}// non-javadoc, see interface HttpClientpublic <T> T execute(final HttpHost target, final HttpRequest request,final ResponseHandler<? extends T> responseHandler, final HttpContext context) throws IOException, ClientProtocolException {if (responseHandler == null) {throw new IllegalArgumentException("Response handler must not be null.");}HttpResponse response = execute(target, request, context);T result;try {result = responseHandler.handleResponse(response);} catch (Throwable t) {HttpEntity entity = response.getEntity();if (entity != null) {try {entity.consumeContent();} catch (Throwable t2) {// Log this exception. The original exception is more// important and will be thrown to the caller.this.log.warn("Error consuming content after an exception.", t2);}}if (t instanceof Error) {throw (Error) t;}if (t instanceof RuntimeException) {throw (RuntimeException) t;}if (t instanceof IOException) {throw (IOException) t;}throw new UndeclaredThrowableException(t);}// Handling the response was successful. Ensure that the content has// been fully consumed.HttpEntity entity = response.getEntity();if (entity != null) {// Let this exception go to the caller. entity.consumeContent();}return result;}} // class AbstractHttpClient View Code

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DefaultHttpClient是一個繼承AbstractHttpClient的類。

/** $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/impl/client/DefaultHttpClient.java $* $Revision: 677250 $* $Date: 2008-07-16 04:45:47 -0700 (Wed, 16 Jul 2008) $** ====================================================================* 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* information on the Apache Software Foundation, please see* <http://www.apache.org/>.**/package org.apache.http.impl.client;import org.apache.http.ConnectionReuseStrategy; import org.apache.http.HttpVersion; import org.apache.http.auth.AuthSchemeRegistry; import org.apache.http.client.AuthenticationHandler; import org.apache.http.client.CookieStore; import org.apache.http.client.CredentialsProvider; import org.apache.http.client.HttpRequestRetryHandler; import org.apache.http.client.RedirectHandler; import org.apache.http.client.UserTokenHandler; import org.apache.http.client.params.AuthPolicy; import org.apache.http.client.params.ClientPNames; import org.apache.http.client.params.CookiePolicy; import org.apache.http.client.protocol.ClientContext; import org.apache.http.client.protocol.RequestAddCookies; import org.apache.http.client.protocol.RequestDefaultHeaders; import org.apache.http.client.protocol.RequestProxyAuthentication; import org.apache.http.client.protocol.RequestTargetAuthentication; import org.apache.http.client.protocol.ResponseProcessCookies; import org.apache.http.conn.ClientConnectionManager; import org.apache.http.conn.ClientConnectionManagerFactory; import org.apache.http.conn.ConnectionKeepAliveStrategy; import org.apache.http.conn.routing.HttpRoutePlanner; import org.apache.http.conn.scheme.PlainSocketFactory; import org.apache.http.conn.scheme.Scheme; import org.apache.http.conn.scheme.SchemeRegistry; import org.apache.http.conn.ssl.SSLSocketFactory; import org.apache.http.cookie.CookieSpecRegistry; import org.apache.http.impl.DefaultConnectionReuseStrategy; import org.apache.http.impl.auth.BasicSchemeFactory; import org.apache.http.impl.auth.DigestSchemeFactory; import org.apache.http.impl.conn.DefaultHttpRoutePlanner; import org.apache.http.impl.conn.SingleClientConnManager; import org.apache.http.impl.cookie.BestMatchSpecFactory; import org.apache.http.impl.cookie.BrowserCompatSpecFactory; import org.apache.http.impl.cookie.NetscapeDraftSpecFactory; import org.apache.http.impl.cookie.RFC2109SpecFactory; import org.apache.http.impl.cookie.RFC2965SpecFactory; import org.apache.http.params.BasicHttpParams; import org.apache.http.params.HttpParams; import org.apache.http.params.HttpProtocolParams; import org.apache.http.protocol.BasicHttpContext; import org.apache.http.protocol.BasicHttpProcessor; import org.apache.http.protocol.HTTP; import org.apache.http.protocol.HttpContext; import org.apache.http.protocol.HttpRequestExecutor; import org.apache.http.protocol.RequestConnControl; import org.apache.http.protocol.RequestContent; import org.apache.http.protocol.RequestExpectContinue; import org.apache.http.protocol.RequestTargetHost; import org.apache.http.protocol.RequestUserAgent; import org.apache.http.util.VersionInfo;/*** Default implementation of an HTTP client.* <br/>* This class replaces <code>HttpClient</code> in HttpClient 3.** @author <a href="mailto:rolandw at apache.org">Roland Weber</a>* @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>** <!-- empty lines to avoid svn diff problems -->* @version $Revision: 677250 $** @since 4.0*/ public class DefaultHttpClient extends AbstractHttpClient {/*** Creates a new HTTP client from parameters and a connection manager.** @param params the parameters* @param conman the connection manager*/public DefaultHttpClient(final ClientConnectionManager conman,final HttpParams params) {super(conman, params);}public DefaultHttpClient(final HttpParams params) {super(null, params);}public DefaultHttpClient() {super(null, null);}@Overrideprotected HttpParams createHttpParams() {HttpParams params = new BasicHttpParams();HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);HttpProtocolParams.setContentCharset(params, HTTP.DEFAULT_CONTENT_CHARSET);/** Android note: Send each request body without first asking the server* whether it will be accepted. Asking first slows down the common case* and results in "417 expectation failed" errors when a HTTP/1.0 server* is behind a proxy. http://b/2471595*/HttpProtocolParams.setUseExpectContinue(params, false); // android-changed// determine the release version from packaged version infofinal VersionInfo vi = VersionInfo.loadVersionInfo("org.apache.http.client", getClass().getClassLoader());final String release = (vi != null) ?vi.getRelease() : VersionInfo.UNAVAILABLE;HttpProtocolParams.setUserAgent(params, "Apache-HttpClient/" + release + " (java 1.4)");return params;}@Overrideprotected HttpRequestExecutor createRequestExecutor() {return new HttpRequestExecutor();}@Overrideprotected ClientConnectionManager createClientConnectionManager() {SchemeRegistry registry = new SchemeRegistry();registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));registry.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));ClientConnectionManager connManager = null; HttpParams params = getParams();ClientConnectionManagerFactory factory = null;// Try first getting the factory directly as an object.factory = (ClientConnectionManagerFactory) params.getParameter(ClientPNames.CONNECTION_MANAGER_FACTORY);if (factory == null) { // then try getting its class name.String className = (String) params.getParameter(ClientPNames.CONNECTION_MANAGER_FACTORY_CLASS_NAME);if (className != null) {try {Class<?> clazz = Class.forName(className);factory = (ClientConnectionManagerFactory) clazz.newInstance();} catch (ClassNotFoundException ex) {throw new IllegalStateException("Invalid class name: " + className);} catch (IllegalAccessException ex) {throw new IllegalAccessError(ex.getMessage());} catch (InstantiationException ex) {throw new InstantiationError(ex.getMessage());}}}if(factory != null) {connManager = factory.newInstance(params, registry);} else {connManager = new SingleClientConnManager(getParams(), registry); }return connManager;}@Overrideprotected HttpContext createHttpContext() {HttpContext context = new BasicHttpContext();context.setAttribute(ClientContext.AUTHSCHEME_REGISTRY, getAuthSchemes());context.setAttribute(ClientContext.COOKIESPEC_REGISTRY, getCookieSpecs());context.setAttribute(ClientContext.COOKIE_STORE, getCookieStore());context.setAttribute(ClientContext.CREDS_PROVIDER, getCredentialsProvider());return context;}@Overrideprotected ConnectionReuseStrategy createConnectionReuseStrategy() {return new DefaultConnectionReuseStrategy();}@Overrideprotected ConnectionKeepAliveStrategy createConnectionKeepAliveStrategy() {return new DefaultConnectionKeepAliveStrategy();}@Overrideprotected AuthSchemeRegistry createAuthSchemeRegistry() {AuthSchemeRegistry registry = new AuthSchemeRegistry(); registry.register(AuthPolicy.BASIC, new BasicSchemeFactory());registry.register(AuthPolicy.DIGEST, new DigestSchemeFactory());return registry;}@Overrideprotected CookieSpecRegistry createCookieSpecRegistry() {CookieSpecRegistry registry = new CookieSpecRegistry();registry.register(CookiePolicy.BEST_MATCH, new BestMatchSpecFactory());registry.register(CookiePolicy.BROWSER_COMPATIBILITY, new BrowserCompatSpecFactory());registry.register(CookiePolicy.NETSCAPE, new NetscapeDraftSpecFactory());registry.register(CookiePolicy.RFC_2109, new RFC2109SpecFactory());registry.register(CookiePolicy.RFC_2965, new RFC2965SpecFactory());return registry;}@Overrideprotected BasicHttpProcessor createHttpProcessor() {BasicHttpProcessor httpproc = new BasicHttpProcessor();httpproc.addInterceptor(new RequestDefaultHeaders());// Required protocol interceptorshttpproc.addInterceptor(new RequestContent());httpproc.addInterceptor(new RequestTargetHost());// Recommended protocol interceptorshttpproc.addInterceptor(new RequestConnControl());httpproc.addInterceptor(new RequestUserAgent());httpproc.addInterceptor(new RequestExpectContinue());// HTTP state management interceptorshttpproc.addInterceptor(new RequestAddCookies());httpproc.addInterceptor(new ResponseProcessCookies());// HTTP authentication interceptorshttpproc.addInterceptor(new RequestTargetAuthentication());httpproc.addInterceptor(new RequestProxyAuthentication());return httpproc;}@Overrideprotected HttpRequestRetryHandler createHttpRequestRetryHandler() {return new DefaultHttpRequestRetryHandler();}@Overrideprotected RedirectHandler createRedirectHandler() {return new DefaultRedirectHandler();}@Overrideprotected AuthenticationHandler createTargetAuthenticationHandler() {return new DefaultTargetAuthenticationHandler();}@Overrideprotected AuthenticationHandler createProxyAuthenticationHandler() {return new DefaultProxyAuthenticationHandler();}@Overrideprotected CookieStore createCookieStore() {return new BasicCookieStore();}@Overrideprotected CredentialsProvider createCredentialsProvider() {return new BasicCredentialsProvider();}@Overrideprotected HttpRoutePlanner createHttpRoutePlanner() {return new DefaultHttpRoutePlanner(getConnectionManager().getSchemeRegistry());}@Overrideprotected UserTokenHandler createUserTokenHandler() {return new DefaultUserTokenHandler();}} // class DefaultHttpClient View Code

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轉載于:https://www.cnblogs.com/answer1022/p/3570847.html

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