将照片上传到 Facebook，返回“期望上传文件”

Question

我正在使用以下代码将照片上传到 Facebook，

hconnect = WinHttpConnect(hsession,L"graph.facebook.com",INTERNET_DEFAULT_HTTPS_PORT,0);`hrequest = WinHttpOpenRequest( hconnect, L"POST", reqUrl,NULL, WINHTTP_NO_REFERER,WINHTTP_DEFAULT_ACCEPT_TYPES,WINHTTP_FLAG_SECURE);

            CString temp = L"Source:";
            temp += objDlg.fileName;

            bResult =  WinHttpAddRequestHeaders(hrequest,temp,(ULONG)-1L,WINHTTP_ADDREQ_FLAG_ADD );

            CString contentType(L"Content-Type:multipart/form-data");

            bResult =  WinHttpAddRequestHeaders(hrequest,contentType,(ULONG)-1L,WINHTTP_ADDREQ_FLAG_ADD );bResult = WinHttpSendRequest( hrequest,WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0,objDlg.fileLength, NULL);
                if(bResult)
                {
                    DWORD dwBytesWritten = 0;
                    bResult = WinHttpWriteData( hrequest,objDlg.memblock, objDlg.fileLength,&dwBytesWritten);}`

但它返回“期望上传文件作为响应。

任何人都可以帮助我。

提前致谢

Answer 1

Faceebook 期望发布数据采用“multipart/form-data”格式。相应地形成数据并与 Winhttpsendrequest 一起发送数据。照片上传后会返回相应的ID。