http用法

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#include <string>#include <iostream>#include <windows.h>#include <winhttp.h>#pragma comment(lib,"winhttp.lib")#pragma comment(lib,"user32.lib")void main(){        DWORD dwSize = 0;    DWORD dwDownloaded = 0;    LPSTR pszOutBuffer = NULL;    HINTERNET  hSession = NULL,               hConnect = NULL,               hRequest = NULL;    BOOL  bResults = FALSE;    hSession=WinHttpOpen(L"User-Agent",WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,WINHTTP_NO_PROXY_NAME,WINHTTP_NO_PROXY_BYPASS,0);    if(hSession)    {        hConnect=WinHttpConnect(hSession,L"192.168.0.8",INTERNET_DEFAULT_HTTP_PORT,0);    }    if(hConnect)    {        hRequest=WinHttpOpenRequest(hConnect, L"POST",L"login.html",L"HTTP/1.1", WINHTTP_NO_REFERER,WINHTTP_DEFAULT_ACCEPT_TYPES,0);    }                LPCWSTR header=L"Content-type: application/x-www-form-urlencoded/r/n";    SIZE_T len = lstrlenW(header);    WinHttpAddRequestHeaders(hRequest,header,DWORD(len), WINHTTP_ADDREQ_FLAG_ADD);    if(hRequest)    {    std::string data="name=host&sign=xx11sad";    const void *ss=(const char *)data.c_str();    bResults=WinHttpSendRequest(hRequest, 0, 0,const_cast<void *>(ss),data.length(), data.length(), 0 );        ////bResults=WinHttpSendRequest(hRequest,WINHTTP_NO_ADDITIONAL_HEADERS, 0,WINHTTP_NO_REQUEST_DATA, 0, 0, 0 );    }    if(bResults)    {        bResults=WinHttpReceiveResponse(hRequest,NULL);    }        if(bResults)    {        do        {            // Check for available data.             dwSize = 0;             if (!WinHttpQueryDataAvailable( hRequest, &dwSize))             {                 printf( "Error %u in WinHttpQueryDataAvailable.\n",GetLastError());                 break;             }             if (!dwSize)                 break;              pszOutBuffer = new char[dwSize+1];              if (!pszOutBuffer)              {                   printf("Out of memory\n");                break;              }               ZeroMemory(pszOutBuffer, dwSize+1);               if (!WinHttpReadData(hRequest, (LPVOID)pszOutBuffer,  dwSize, &dwDownloaded))               {                     printf( "Error %u in WinHttpReadData.\n", GetLastError());               }               else               {                   printf("%s", pszOutBuffer);               }               delete [] pszOutBuffer;               if (!dwDownloaded)                   break;        } while (dwSize > 0);    }            if (hRequest) WinHttpCloseHandle(hRequest);    if (hConnect) WinHttpCloseHandle(hConnect);    if (hSession) WinHttpCloseHandle(hSession);         system("pause");}
http://www.cnblogs.com/ytjjyy/archive/2012/05/05/2484844.html
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