转CInternetSession的代理与超时使用

2. CInternetSession的代理与超时使用

CInternetSession session;

CHttpFile *file = NULL;  

 

INTERNET_PROXY_INFO proxyinfo;

proxyinfo.dwAccessType = INTERNET_OPEN_TYPE_PROXY;

proxyinfo.lpszProxy ="211.104.243.73:8080";

proxyinfo.lpszProxyBypass = NULL;

session.SetOption(INTERNET_OPTION_PROXY,(LPVOID)&proxyinfo,

sizeof(INTERNET_PROXY_INFO));

 

session.SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, 5000);      // 5秒的连接超时

session.SetOption(INTERNET_OPTION_SEND_TIMEOUT, 1000);           // 1秒的发送超时

session.SetOption(INTERNET_OPTION_RECEIVE_TIMEOUT, 7000);        // 7秒的接收超时

session.SetOption(INTERNET_OPTION_DATA_SEND_TIMEOUT, 1000);     // 1秒的发送超时

session.SetOption(INTERNET_OPTION_DATA_RECEIVE_TIMEOUT, 7000);       // 7秒的接收超时

session.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1);          // 1次重试

 

try{

       file = (CHttpFile*)session.OpenURL("http://www.163.com",1,

INTERNET_FLAG_TRANSFER_ASCII|INTERNET_FLAG_RELOAD|INTERNET_FLAG_DONT_CACHE);

}catch(CInternetException * m_pException){

       file = NULL;

       m_pException->m_dwError;

       m_pException->Delete();

       session.Close();

       MessageBox("CInternetException");

       return;

}

CString strLine;

if(file != NULL){

       while(file->ReadString(strLine) != NULL){

              MessageBox(strLine);

       }

}else{

       MessageBox("fail");

}

file->Close();

session.Close();

 

3. CInternetSession的POST使用

CInternetSession m_InetSession(_T("session"),

       0,

       INTERNET_OPEN_TYPE_PRECONFIG,

       NULL,

       NULL,

       INTERNET_FLAG_DONT_CACHE);     //设置不缓冲

CHttpConnection* pServer = NULL;

CHttpFile* pFile = NULL;

CString strHtml = "";

CString strRequest = "name=123&pwd=321\r\n"; //POST过去的数据

CString strHeaders = "Accept: */*\r\nReferer: http://www.goodwaiter.com/\r\nAccept-Language: zh-cn\r\nContent-Type: application/x-www-form-urlencoded\r\nAccept-Encoding: gzip, deflate\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";

 

try{

       INTERNET_PORT nPort; //端口

       nPort=80;

       pServer = m_InetSession.GetHttpConnection("www.goodwaiter.com", nPort);

       pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_POST,"/");

       pFile->AddRequestHeaders(strHeaders);

 

       pFile->SendRequestEx(strRequest.GetLength());

       pFile->WriteString(strRequest); //重要-->m_Request 中有"name=aaa&name2=BBB&..."

       pFile->EndRequest();

       DWORD dwRet;

       pFile->QueryInfoStatusCode(dwRet);

 

       if (dwRet == HTTP_STATUS_OK){

              CString strLine;

              while ((nRead = pFile->ReadString(strLine))>0)

              {

                     strHtml += strLine;

              }

       }    

       delete pFile;

       delete pServer;

}

catch (CInternetException* e){

       e->m_dwContext;

}

 

调用完一次之后，再次调用会出现不发送请求但会返回 HTTP_STATUS_OK 的现象。

需要加一句代码。听说是windows mobile 的一个BUG。

BOOL b = InternetSetOption (session,INTERNET_OPTION_RESET_URLCACHE_SESSION,NULL,0);

一段代码：

CInternetSession session(_T("HttpClient"),1, INTERNET_OPEN_TYPE_DIRECT );
 CString responseUtf8;
 DWORD dwStatusCode;
 CHttpFile* pfile; 

 try
 { 
  BOOL b = InternetSetOption(session,INTERNET_OPTION_RESET_URLCACHE_SESSION,NULL,0);
  pfile = (CHttpFile*)session.OpenURL(url);

  pfile->QueryInfoStatusCode(dwStatusCode);   
  if (dwStatusCode == HTTP_STATUS_OK) 
  { 
   CString strLine;
   while(pfile->ReadString(strLine)) 
   { 
    responseUtf8 += strLine; 
   }
  }

  pfile->Close();
  session.Close();

转自:www.hao137.com