HttpClient的3种超时

最新推荐文章于 2024-02-19 09:49:23 发布

iteye_264

最新推荐文章于 2024-02-19 09:49:23 发布

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本文详细介绍了HttpClient中的三种超时设置：连接池超时、连接超时及请求超时，并提供了两个示例代码，帮助理解如何在实际应用中进行配置。

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原文：http://www.cnblogs.com/codingmyworld/archive/2011/08/17/2141706.html

HttpClient的3种超时说明

/* 从连接池中取连接的超时时间 */
ConnManagerParams.setTimeout(params, 1000);
/* 连接超时 */
HttpConnectionParams.setConnectionTimeout(params, 2000);
/* 请求超时 */
HttpConnectionParams.setSoTimeout(params, 4000);

第一行设置ConnectionPoolTimeout：这定义了从ConnectionManager管理的连接池中取出连接的超时时间，此处设置为1秒。

第二行设置ConnectionTimeout：　　这定义了通过网络与服务器建立连接的超时时间。Httpclient包中通过一个异步线程去创建与服务器的socket连接，这就是该socket连接的超时时间，此处设置为2秒。

第三行设置SocketTimeout：　　　　这定义了Socket读数据的超时时间，即从服务器获取响应数据需要等待的时间，此处设置为4秒。

示例1

package edu.cdut.robin;

import org.apache.http.HttpVersion;

import org.apache.http.client.HttpClient;

import org.apache.http.conn.ClientConnectionManager;

import org.apache.http.conn.params.ConnManagerParams;

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.impl.client.DefaultHttpClient;

import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;

import org.apache.http.params.BasicHttpParams;

import org.apache.http.params.HttpConnectionParams;

import org.apache.http.params.HttpParams;

import org.apache.http.params.HttpProtocolParams;

import org.apache.http.protocol.HTTP;

public class CustomerHttpClient

{

private static final String CHARSET = HTTP.UTF_8;

private static HttpClient customerHttpClient;

private CustomerHttpClient()

{

}

public static synchronized HttpClient getHttpClient()

{

if (null == customerHttpClient)

{

HttpParams params = new BasicHttpParams();

/* 设置一些基本参数 */

HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);

HttpProtocolParams.setContentCharset(params, CHARSET);

HttpProtocolParams.setUseExpectContinue(params, true);

HttpProtocolParams

.setUserAgent(

params,

"Mozilla/5.0(Linux;U;Android 2.2.1;en-us;Nexus One Build.FRG83) "

+ "AppleWebKit/553.1(KHTML,like Gecko) Version/4.0 Mobile Safari/533.1");

/* 超时设置 */

/* 从连接池中取连接的超时时间 */

ConnManagerParams.setTimeout(params, 1000);

/* 连接超时 */

HttpConnectionParams.setConnectionTimeout(params, 2000);

/* 请求超时 */

HttpConnectionParams.setSoTimeout(params, 4000);

/* 设置我们的HttpClient支持HTTP和HTTPS两种模式 */

SchemeRegistry schReg = new SchemeRegistry();

schReg.register(new Scheme("http", PlainSocketFactory

.getSocketFactory(), 80));

schReg.register(new Scheme("https", SSLSocketFactory

.getSocketFactory(), 443));

/* 使用线程安全的连接管理来创建HttpClient */

ClientConnectionManager conMgr = new ThreadSafeClientConnManager(

params, schReg);

customerHttpClient = new DefaultHttpClient(conMgr, params);

}

return customerHttpClient;

}

示例2

void doHttpGet(String userAgent, Context context, String uri)

{

AndroidHttpClient client = null;

client = AndroidHttpClient.newInstance(userAgent, context);

HttpParams params = client.getParams();

HttpConnectionParams.setConnectionTimeout(params, 30000);

HttpConnectionParams.setSoTimeout(params, 60000);

HttpClientParams.setRedirecting(params, true);

HttpClientParams.setAuthenticating(params, false);

HttpResponse response;

HttpGet request = new HttpGet(uri);

try

{

response = client.execute(request);

} catch (IllegalArgumentException ex)

{

} catch (IOException ex)

{

}

结束！