CInternetSession的简单使用(代理，超时，无缓存，下文件)
1. CInternetSession的简单使用
CInternetSession session;
CHttpFile *file = NULL;
CString strURL = " http://www.20abcd.com";
CString strHtml = "”; //存放网页数据
try{
file = (CHttpFile*)session.OpenURL(strURL);
}catch(CInternetException * m_pException){
file = NULL;
m_pException->m_dwError;
m_pException->Delete();
session.Close();
MessageBox("CInternetException");
}
CString strLine;
if(file != NULL){
while(file->ReadString(strLine) != NULL){
strHtml += strLine;
}
}else{
MessageBox("fail");
}
session.Close();
file->Close();
delete file;
file = NULL;
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();