VC实现Http Put方法

http://blog.csdn.net/mrxyz098/article/details/27991335

该函数可用于向服务器上传文件。服务器端可以有专门的接收机制，也可以没有。

 #include <Wininet.h>

 #pragma comment(lib, "Wininet.lib")
 BOOL HttpRequestPut(LPCTSTR pHomeUrl, LPCTSTR pPageUrl, LONG nPort,
     LPCTSTR pFile, CString *psRes, PBOOL pbExit)
 {
     LPINTERNET_BUFFERS pBufferIn = new INTERNET_BUFFERS;
     ZeroMemory(pBufferIn, sizeof(INTERNET_BUFFERS));
     LPBYTE pBuf = new BYTE[1024];
     HINTERNET hInternet = NULL;
     HINTERNET hSession = NULL;
     HINTERNET hRequest = NULL;
     DWORD dwBytesRead;
     DWORD dwBytesWritten;
     HANDLE hFile = INVALID_HANDLE_VALUE;
     CString sFormat(_T("Connection: Keep-Alive\r\n"));
     sFormat += _T("Content-Type: application/octet-stream\r\n");
     sFormat += _T("Content-Length: %u\r\n");
     sFormat += _T("User-Agent:Test\r\n");
     sFormat += _T("Host: %s:%u\r\n");
     sFormat += _T("Accept: *.*,*/*\r\n");
     sFormat += _T("\r\n");
     CString sHeader(_T(""));
     CString sRes(_T(""));

     do
     {
         hInternet = InternetOpen(_T("Mozilla/4.0 (compatible; Indy Library)"),
 　　　　　　INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
         if( NULL == hInternet )
         {
             sRes.Format(_T("Open link error. ErrCode=[%u]"), GetLastError());
             break;
         }

         hSession = InternetConnect(hInternet, pHomeUrl, (INTERNET_PORT)nPort,
             NULL, NULL,INTERNET_SERVICE_HTTP, INTERNET_FLAG_NO_CACHE_WRITE, 0);
         hRequest = HttpOpenRequest(hSession, _T("PUT"), pPageUrl,
             NULL, NULL, NULL, INTERNET_FLAG_NO_CACHE_WRITE, 0);
         if( FALSE == hRequest )
         {
             sRes.Format(_T("Open request handle error. ErrCode=[%u]"),
                 GetLastError());
             break;
         }

         hFile = CreateFile(pFile, GENERIC_READ, FILE_SHARE_READ, NULL,
              OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
         if( hFile == INVALID_HANDLE_VALUE )
         {
             sRes.Format(_T("Open File error. ErrCode=[%u] File=[%s]"),
                 GetLastError(), pFile);
             break;
         }

         pBufferIn->dwStructSize = sizeof(INTERNET_BUFFERS);
         pBufferIn->dwBufferTotal = GetFileSize(hFile, NULL);
         sHeader.Format(sFormat, pBufferIn->dwBufferTotal, pHomeUrl, nPort);
         pBufferIn->lpcszHeader = sHeader;
         pBufferIn->dwHeadersLength = sHeader.GetLength();

         if( FALSE ==
             HttpSendRequestEx(hRequest, pBufferIn, NULL, HSR_INITIATE, 0) )
         {
             sRes.Format(_T("Send request error."));
             break;
         }

         DWORD dwSendSize = 0;
         while( dwSendSize < pBufferIn->dwBufferTotal )
         {
             if( (NULL!=pbExit) && (FALSE!=(*pbExit)) )
             {
                 sRes.Format(_T("Stop upload because receive exit cmd."));
                 break;
             }

             if( FALSE == ReadFile( hFile, pBuf, 1024, &dwBytesRead, NULL) )
             {
                 sRes.Format(_T("Read File error. ErrCode=[%u] File=[%s]"),
                     GetLastError(), pFile);
                 break;
             }

             if( FALSE == InternetWriteFile(hRequest, pBuf, dwBytesRead,
                   &dwBytesWritten) )
             {// ERROR_INTERNET_CONNECTION_ABORTED
                 sRes.Format(_T("Upload File error. ErrCode=[%u] File=[%s]"),
 　　　　　　　　　　　 GetLastError(), pFile);
                 break;
             }

             dwSendSize += dwBytesWritten;
         }

         if( FALSE == HttpEndRequest(hRequest, NULL, 0, 0) )
         {
             sRes.Format(_T("End request error. ErrCode=[%u] File=[%s]"),
                 GetLastError(), pFile);
         }

     }while(FALSE);

     if( hFile != INVALID_HANDLE_VALUE )
     {
         CloseHandle(hFile);
     }
     if( hRequest )
     {
         InternetCloseHandle(hRequest);
     }
     if( hSession )
     {
         InternetCloseHandle(hSession);
     }
     if( hInternet )
     {
         InternetCloseHandle(hInternet);
     }

     delete []pBuf;
     delete pBufferIn;

     if( NULL != psRes )
     {
         *psRes = sRes;
     }

     return sRes.IsEmpty();
 }