HttpClient的3种超时

水深无声 2022-04-18 05:35 225阅读 0赞

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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！

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