如何用winsock登录网页并保持登录状态

[xiaozi086520]

如何用winsock登录网页

并保持登录状态

[见习学术士]

发送一个登陆的POST数据包就可以了。
然后把SESSION保存下来。

[jourbin]

保留session or cookie就行

[squiffy]

一点建议，可以看看下面几个类，HTTP操作比WinSock方便多了。

CInternetSession
CHttpConnection
CHttpFile

/******下面是一个大概的例子***************/
CInternetSession *m_pInnetSession;
CHttpConnection *m_pHttpConnection;
CHttpFile *m_pHttpFile;

//Step1：初始化
int CMyGetWebData::InitWebSession(CString szServerName, int iPort)
{
//create a new internet session
m_pInnetSession = new CMyInterSession();

//enable call back function, so can handle some message
//m_pInnetSession->EnableStatusCallback();

//init m_pInnetSession, tell it my instance
//m_pInnetSession->Init(this);

try
{
//then open to a server,and return a http connection
m_pHttpConnection = m_pInnetSession->GetHttpConnection((LPCTSTR)szServerName, INTERNET_FLAG_RELOAD, (INTERNET_PORT)iPort);
if(m_pHttpConnection == NULL)
{
//have some error
return -1;
}
}
catch(CInternetException *pExcp)
{
//have some exception, handle it, then delete, waiwai
pExcp->Delete();
return -1;
}

return 0;
}

//Step2：发送请求，我当时写的是用GET方法。可以携带任何Request头。
/****
采用GET方式获得一个网页数据
szGetStr: The Get URL string(not include 'get')
****/
int CMyGetWebData::SendGetRequest(CString szGetStr)
{
try
{
m_pHttpFile = m_pHttpConnection->OpenRequest(CHttpConnection::HTTP_VERB_GET, (LPCTSTR)szGetStr, NULL, 1, NULL, NULL, INTERNET_FLAG_RELOAD);

//增加各种Request Header
m_pHttpFile->AddRequestHeaders( theApp.m_constAccept);
m_pHttpFile->AddRequestHeaders( theApp.m_constAcceptLang);
m_pHttpFile->AddRequestHeaders( theApp.m_constAcceptEncode);
m_pHttpFile->AddRequestHeaders( theApp.m_constUserAgent);

m_pHttpFile->SendRequest();

#if 0
//handle data
if(HandleWebFileFirst() != 0)
{
return -1;
}
#endif
}
catch(CInternetException *pExcp)
{
//have some exception, handle it, then delete, waiwai
pExcp->Delete();
return -1;
}

return 0;
}

//Step3：收到HTML文件之后处理。
/*对HTML文件进行处理*/
int CMyGetWebData::HandleWebFile(void)
{

//check return code
if(m_pHttpFile->QueryInfo(HTTP_QUERY_STATUS_CODE, iRetCode) == 0)
{
//have some error
iErrCode = GetLastError();
goto Err_Exit;
}
/*
else
{
iRetCode = 0;
}
*/

if(iRetCode != 200)
{
CString cRetText;
//not OK , can record some reason
m_pHttpFile->QueryInfo(HTTP_QUERY_STATUS_TEXT, cRetText);
goto Err_Exit;
}

//success begin handle

//获得文件长度
m_pHttpFile->QueryInfo(HTTP_QUERY_CONTENT_LENGTH, dwHttpFileSize);
if( dwHttpFileSize == 0)
{
//查询得到的页面不对，没有查询到相应的内容
ASSERT(FALSE);
goto Err_Exit;
}
...
}

[蒋晟]

为什么要用winsock?winhttp/wininet都支持http协议

[jourbin]

winsock有很多优点啊
比如最讨厌的wininet超时问题
比如绕过http-only等等

[ToCpp]

也可以直接用Webbroser试试，我最近也在做这个

[ziplj]

推荐CHttpFile 这样不用管理cookie
最近用C#重写 cookie太麻烦了...

[JonathanS666]

保存cookie就可以，libcurl可以实现