clientchunkencodedpost.java

用java调用httpclient的方式获取网页内容

/*
 * $HeadURL: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/examples/org/apache/http/examples/client/ClientChunkEncodedPost.java $
 * $Revision: 554217 $
 * $Date: 2007-07-07 17:03:22 +0200 (Sat, 07 Jul 2007) $
 * ====================================================================
 *
 *  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.examples.client;

import java.io.File;
import java.io.FileInputStream;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.InputStreamEntity;
import org.apache.http.impl.client.DefaultHttpClient;

/**
 * Example how to use unbuffered chunk-encoded POST request.
 */
public class ClientChunkEncodedPost {

    public static void main(String[] args) throws Exception {
        if (args.length != 1)  {
            System.out.println("File path not given");
            System.exit(1);
        }
        HttpClient httpclient = new DefaultHttpClient();

        HttpPost httppost = new HttpPost("http://localhost:8080" +
                "/servlets-examples/servlet/RequestInfoExample");

        File file = new File(args[0]);

        InputStreamEntity reqEntity = new InputStreamEntity(
                new FileInputStream(file), -1);
        reqEntity.setContentType("binary/octet-stream");
        reqEntity.setChunked(true);
        // It may be more appropriate to use FileEntity class in this particular 
        // instance but we are using a more generic InputStreamEntity to demonstrate
        // the capability to stream out data from any arbitrary source
        // 
        // FileEntity entity = new FileEntity(file, "binary/octet-stream"); 
        
        httppost.setEntity(reqEntity);
        
        System.out.println("executing request " + httppost.getRequestLine());
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity resEntity = response.getEntity();

        System.out.println("----------------------------------------");
        System.out.println(response.getStatusLine());
        if (resEntity != null) {
            System.out.println("Response content length: " + resEntity.getContentLength());
            System.out.println("Chunked?: " + resEntity.isChunked());
        }
        if (resEntity != null) {
            resEntity.consumeContent();
        }
    }
    
}