HttpClient压缩传输的代码，大部分都不靠谱，apache httpclient 官网的最靠谱，亲测！
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HttpClient压缩传输的代码，大部分都不靠谱，apache httpclient 官网的最靠谱，亲测！
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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
?* information on the Apache Software Foundation, please see
?* <http://www.apache.org/>.
?*
?*/
?
package org.apache.http.examples.client;
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import java.io.IOException;
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import org.apache.http.Header;
import org.apache.http.HeaderElement;
import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseInterceptor;
import org.apache.http.client.entity.GzipDecompressingEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;
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/**
?* Demonstration of the use of protocol interceptors to transparently
?* modify properties of HTTP messages sent / received by the HTTP client.
?* <p/>
?* In this particular case HTTP client is made capable of transparent content
?* GZIP compression by adding two protocol interceptors: a request interceptor
?* that adds 'Accept-Encoding: gzip' header to all outgoing requests and
?* a response interceptor that automatically expands compressed response
?* entities by wrapping them with a uncompressing decorator class. The use of
?* protocol interceptors makes content compression completely transparent to
?* the consumer of the {@link org.apache.http.client.HttpClient HttpClient}
?* interface.
?*/
public class ClientGZipContentCompression {
?
? ? public final static void main(String[] args) throws Exception {
? ? ? ? DefaultHttpClient httpclient = new DefaultHttpClient();
? ? ? ? try {
? ? ? ? ? ? httpclient.addRequestInterceptor(new HttpRequestInterceptor() {
?
? ? ? ? ? ? ? ? public void process(
? ? ? ? ? ? ? ? ? ? ? ? final HttpRequest request,
? ? ? ? ? ? ? ? ? ? ? ? final HttpContext context) throws HttpException, IOException {
? ? ? ? ? ? ? ? ? ? if (!request.containsHeader("Accept-Encoding")) {
? ? ? ? ? ? ? ? ? ? ? ? request.addHeader("Accept-Encoding", "gzip");
? ? ? ? ? ? ? ? ? ? }
? ? ? ? ? ? ? ? }
?
? ? ? ? ? ? });
?
?
? ? ? ? ? ? httpclient.addResponseInterceptor(new HttpResponseInterceptor() {
?
? ? ? ? ? ? ? ? public void process(
? ? ? ? ? ? ? ? ? ? ? ? final HttpResponse response,
? ? ? ? ? ? ? ? ? ? ? ? final HttpContext context) throws HttpException, IOException {
? ? ? ? ? ? ? ? ? ? HttpEntity entity = response.getEntity();
? ? ? ? ? ? ? ? ? ? if (entity != null) {
? ? ? ? ? ? ? ? ? ? ? ? Header ceheader = entity.getContentEncoding();
? ? ? ? ? ? ? ? ? ? ? ? if (ceheader != null) {
? ? ? ? ? ? ? ? ? ? ? ? ? ? HeaderElement[] codecs = ceheader.getElements();
? ? ? ? ? ? ? ? ? ? ? ? ? ? for (int i = 0; i < codecs.length; i++) {
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (codecs[i].getName().equalsIgnoreCase("gzip")) {
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? response.setEntity(
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? new GzipDecompressingEntity(response.getEntity()));
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? return;
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? }
? ? ? ? ? ? ? ? ? ? ? ? ? ? }
? ? ? ? ? ? ? ? ? ? ? ? }
? ? ? ? ? ? ? ? ? ? }
? ? ? ? ? ? ? ? }
?
? ? ? ? ? ? });
?
?
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? ? ? ? ? ? HttpGet httpget = new HttpGet("http://cppmule.zapto.org/acr/acrphone-service/area/cities");
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? ? ? ? ? ? // Execute HTTP request
? ? ? ? ? ? System.out.println("executing request " + httpget.getURI());
? ? ? ? ? ? HttpResponse response = httpclient.execute(httpget);
?
? ? ? ? ? ? System.out.println("----------------------------------------");
? ? ? ? ? ? System.out.println(response.getStatusLine());
? ? ? ? ? ? System.out.println(response.getLastHeader("Content-Encoding"));
? ? ? ? ? ? System.out.println(response.getLastHeader("Content-Length"));
? ? ? ? ? ? System.out.println("----------------------------------------");
?
? ? ? ? ? ? HttpEntity entity = response.getEntity();
?
? ? ? ? ? ? if (entity != null) {
? ? ? ? ? ? ? ? String content = EntityUtils.toString(entity);
? ? ? ? ? ? ? ? System.out.println(content);
? ? ? ? ? ? ? ? System.out.println("----------------------------------------");
? ? ? ? ? ? ? ? System.out.println("Uncompressed size: "+content.length());
? ? ? ? ? ? }
?
? ? ? ? } finally {
? ? ? ? ? ? // When HttpClient instance is no longer needed,
? ? ? ? ? ? // shut down the connection manager to ensure
? ? ? ? ? ? // immediate deallocation of all system resources
? ? ? ? ? ? httpclient.getConnectionManager().shutdown();
? ? ? ? }
? ? }
?
}
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