Question

我有一个带有URI = http：//localhost/IO_100_Service.svc/xml？id = {id}的虚拟Web服务，它以XML格式返回数据我想在VC ++中使用WINInet APi来调用这个服务。任何人都可以帮我解决如何使用contruct“HttpSendRequest”方法来添加标题和数据来调用这个服务。

Answer 1

以下是您应该能够根据需要进行修改的示例代码。我使用命令行模板项目使用VS2005进行了测试。

    #include <tchar.h>
    #include <wininet.h>  

    /// ....

    HINTERNET hIntSession = 
      ::InternetOpen(_T("MyApp"), INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);

    HINTERNET hHttpSession = 
      InternetConnect(hIntSession, _T("api.twitter.com"), 80, 0, 0, INTERNET_SERVICE_HTTP, 0, NULL);

    HINTERNET hHttpRequest = HttpOpenRequest(
      hHttpSession, 
      _T("GET"), 
      _T("1/statuses/user_timeline.xml?screen_name=twitterapi"),
      0, 0, 0, INTERNET_FLAG_RELOAD, 0);

    TCHAR* szHeaders = _T("Content-Type: text/html\nMySpecialHeder: whatever");
    CHAR szReq[1024] = "";
    if( !HttpSendRequest(hHttpRequest, szHeaders, _tcslen(szHeaders), szReq, strlen(szReq))) {
      DWORD dwErr = GetLastError();
      /// handle error
    }

    CHAR szBuffer[1025];
    DWORD dwRead=0;
    while(::InternetReadFile(hHttpRequest, szBuffer, sizeof(szBuffer)-1, &dwRead) && dwRead) {
      szBuffer[dwRead] = 0;
      OutputDebugStringA(szBuffer);
      dwRead=0;
    }

    ::InternetCloseHandle(hHttpRequest);
    ::InternetCloseHandle(hHttpSession);
    ::InternetCloseHandle(hIntSession);

如何构造WININET的HttpSendRequest方法

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