http://hc.apache.org/httpcomponents-client: Apache HttpComponents Client (The Apache Software Foundation)
  • Julius Davies
  • Andrea Selva
  • Steffen Pingel
  • Quintin Beukes
  • Marc Beyerle
  • James Abley
  • Michajlo Matijkiw 
/*
 * ====================================================================
 * 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.HttpVersion;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.client.protocol.RequestAddCookies;
import org.apache.http.client.protocol.RequestAuthCache;
import org.apache.http.client.protocol.RequestClientConnControl;
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.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.params.SyncBasicHttpParams;
import org.apache.http.protocol.BasicHttpProcessor;
import org.apache.http.protocol.HTTP;
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 HttpClient pre-configured for most common use scenarios. 
 Please see the Javadoc for createHttpProcessor() for the details of the interceptors that are set up by default. 

Additional interceptors can be added as follows, but
take care not to add the same interceptor more than once.

DefaultHttpClient httpclient = new DefaultHttpClient();
httpclient.addRequestInterceptor(new RequestAcceptEncoding());
httpclient.addResponseInterceptor(new ResponseContentEncoding());




This class sets up the following parameters if not explicitly set:

    

  • Version: HttpVersion.HTTP_1_1
    • 

  • ContentCharset: HTTP.DEFAULT_CONTENT_CHARSET
    • 

  • NoTcpDelay: true
    • 

  • SocketBufferSize: 8192
    • 

  • UserAgent: Apache-HttpClient/release (java 1.5)
    • 




The following parameters can be used to customize the behavior of this
class:



Since:4.0
Deprecated:(4.3) use HttpClientBuilder see also CloseableHttpClient.
/**
 * Default implementation of {@link org.apache.http.client.HttpClient} pre-configured
 * for most common use scenarios.
 * <p>
 * Please see the Javadoc for {@link #createHttpProcessor()} for the details of the interceptors
 * that are set up by default.
 * <p>
 * Additional interceptors can be added as follows, but
 * take care not to add the same interceptor more than once.
 * <pre>
 * DefaultHttpClient httpclient = new DefaultHttpClient();
 * httpclient.addRequestInterceptor(new RequestAcceptEncoding());
 * httpclient.addResponseInterceptor(new ResponseContentEncoding());
 * </pre>
 * <p>
 * This class sets up the following parameters if not explicitly set:
 * <ul>
 * <li>Version: HttpVersion.HTTP_1_1</li>
 * <li>ContentCharset: HTTP.DEFAULT_CONTENT_CHARSET</li>
 * <li>NoTcpDelay: true</li>
 * <li>SocketBufferSize: 8192</li>
 * <li>UserAgent: Apache-HttpClient/release (java 1.5)</li>
 * </ul>
 * <p>
 * The following parameters can be used to customize the behavior of this
 * class:
 * <ul>
 *  <li>{@link org.apache.http.params.CoreProtocolPNames#PROTOCOL_VERSION}</li>
 *  <li>{@link org.apache.http.params.CoreProtocolPNames#STRICT_TRANSFER_ENCODING}</li>
 *  <li>{@link org.apache.http.params.CoreProtocolPNames#HTTP_ELEMENT_CHARSET}</li>
 *  <li>{@link org.apache.http.params.CoreProtocolPNames#USE_EXPECT_CONTINUE}</li>
 *  <li>{@link org.apache.http.params.CoreProtocolPNames#WAIT_FOR_CONTINUE}</li>
 *  <li>{@link org.apache.http.params.CoreProtocolPNames#USER_AGENT}</li>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#TCP_NODELAY}</li>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#SO_TIMEOUT}</li>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#SO_LINGER}</li>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#SO_REUSEADDR}</li>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#SOCKET_BUFFER_SIZE}</li>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#CONNECTION_TIMEOUT}</li>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#MAX_LINE_LENGTH}</li>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#MAX_HEADER_COUNT}</li>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#STALE_CONNECTION_CHECK}</li>
 *  <li>{@link org.apache.http.conn.params.ConnRoutePNames#FORCED_ROUTE}</li>
 *  <li>{@link org.apache.http.conn.params.ConnRoutePNames#LOCAL_ADDRESS}</li>
 *  <li>{@link org.apache.http.conn.params.ConnRoutePNames#DEFAULT_PROXY}</li>
 *  <li>{@link org.apache.http.cookie.params.CookieSpecPNames#DATE_PATTERNS}</li>
 *  <li>{@link org.apache.http.cookie.params.CookieSpecPNames#SINGLE_COOKIE_HEADER}</li>
 *  <li>{@link org.apache.http.auth.params.AuthPNames#CREDENTIAL_CHARSET}</li>
 *  <li>{@link org.apache.http.client.params.ClientPNames#COOKIE_POLICY}</li>
 *  <li>{@link org.apache.http.client.params.ClientPNames#HANDLE_AUTHENTICATION}</li>
 *  <li>{@link org.apache.http.client.params.ClientPNames#HANDLE_REDIRECTS}</li>
 *  <li>{@link org.apache.http.client.params.ClientPNames#MAX_REDIRECTS}</li>
 *  <li>{@link org.apache.http.client.params.ClientPNames#ALLOW_CIRCULAR_REDIRECTS}</li>
 *  <li>{@link org.apache.http.client.params.ClientPNames#VIRTUAL_HOST}</li>
 *  <li>{@link org.apache.http.client.params.ClientPNames#DEFAULT_HOST}</li>
 *  <li>{@link org.apache.http.client.params.ClientPNames#DEFAULT_HEADERS}</li>
 *  <li>{@link org.apache.http.client.params.ClientPNames#CONN_MANAGER_TIMEOUT}</li>
 * </ul>
 *
 * @since 4.0
 *
 * @deprecated (4.3) use {@link HttpClientBuilder} see also {@link CloseableHttpClient}.
 */
@Contract(threading = ThreadingBehavior.SAFE_CONDITIONAL)
@Deprecated
public class DefaultHttpClient extends AbstractHttpClient {

    
Creates a new HTTP client from parameters and a connection manager.

Params:
  • params –    the parameters
  • conman –    the connection manager
/**
     * 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);
    }


    
Since:4.1
/**
     * @since 4.1
     */
    public DefaultHttpClient(
            final ClientConnectionManager conman) {
        super(conman, null);
    }


    public DefaultHttpClient(final HttpParams params) {
        super(null, params);
    }


    public DefaultHttpClient() {
        super(null, null);
    }


    
Creates the default set of HttpParams by invoking setDefaultHttpParams(HttpParams) 
Returns:a new instance of SyncBasicHttpParams with the defaults applied to it.
/**
     * Creates the default set of HttpParams by invoking {@link DefaultHttpClient#setDefaultHttpParams(HttpParams)}
     *
     * @return a new instance of {@link SyncBasicHttpParams} with the defaults applied to it.
     */
    @Override
    protected HttpParams createHttpParams() {
        final HttpParams params = new SyncBasicHttpParams();
        setDefaultHttpParams(params);
        return params;
    }

    
Saves the default set of HttpParams in the provided parameter.
These are:


/**
     * Saves the default set of HttpParams in the provided parameter.
     * These are:
     * <ul>
     * <li>{@link org.apache.http.params.CoreProtocolPNames#PROTOCOL_VERSION}:
     *   1.1</li>
     * <li>{@link org.apache.http.params.CoreProtocolPNames#HTTP_CONTENT_CHARSET}:
     *   ISO-8859-1</li>
     * <li>{@link org.apache.http.params.CoreConnectionPNames#TCP_NODELAY}:
     *   true</li>
     * <li>{@link org.apache.http.params.CoreConnectionPNames#SOCKET_BUFFER_SIZE}:
     *   8192</li>
     * <li>{@link org.apache.http.params.CoreProtocolPNames#USER_AGENT}:
     *   Apache-HttpClient (Java 1.5)</li>
     * </ul>
     */
    public static void setDefaultHttpParams(final HttpParams params) {
        HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
        HttpProtocolParams.setContentCharset(params, HTTP.DEF_CONTENT_CHARSET.name());
        HttpConnectionParams.setTcpNoDelay(params, true);
        HttpConnectionParams.setSocketBufferSize(params, 8192);
        HttpProtocolParams.setUserAgent(params, VersionInfo.getUserAgent("Apache-HttpClient",
                "org.apache.http.client", DefaultHttpClient.class));
    }

    
Returns:the processor with the added interceptors.
/**
    * Create the processor with the following interceptors:
    * <ul>
    * <li>{@link RequestDefaultHeaders}</li>
    * <li>{@link RequestContent}</li>
    * <li>{@link RequestTargetHost}</li>
    * <li>{@link RequestClientConnControl}</li>
    * <li>{@link RequestUserAgent}</li>
    * <li>{@link RequestExpectContinue}</li>
    * <li>{@link RequestAddCookies}</li>
    * <li>{@link ResponseProcessCookies}</li>
    * <li>{@link RequestAuthCache}</li>
    * <li>{@link RequestTargetAuthentication}</li>
    * <li>{@link RequestProxyAuthentication}</li>
    * </ul>
    * <p>
    * @return the processor with the added interceptors.
    */
    @Override
    protected BasicHttpProcessor createHttpProcessor() {
        final BasicHttpProcessor httpproc = new BasicHttpProcessor();
        httpproc.addInterceptor(new RequestDefaultHeaders());
        // Required protocol interceptors
        httpproc.addInterceptor(new RequestContent());
        httpproc.addInterceptor(new RequestTargetHost());
        // Recommended protocol interceptors
        httpproc.addInterceptor(new RequestClientConnControl());
        httpproc.addInterceptor(new RequestUserAgent());
        httpproc.addInterceptor(new RequestExpectContinue());
        // HTTP state management interceptors
        httpproc.addInterceptor(new RequestAddCookies());
        httpproc.addInterceptor(new ResponseProcessCookies());
        // HTTP authentication interceptors
        httpproc.addInterceptor(new RequestAuthCache());
        httpproc.addInterceptor(new RequestTargetAuthentication());
        httpproc.addInterceptor(new RequestProxyAuthentication());
        return httpproc;
    }

}