C++ client upload to PHP server

[wwhitman]

'm having issues transferring a file from a WEB client running a C++ application to a PHP server script. I have debugged through the C++ side and no errors are reported, but the file does not appear on the server. My current environment is a Vista business system running IIS. I developed the C++ app using Microsoft's Visual Studio. I know the configuration is correct as the application does communicate with PHP scripts to transfer XML data back and forth. I cannot seem to get the file upload to work. I have attached both the C++ and PHP sides. Any assistance would be greatly appreciated.
C++ code
Expand|Select|W rap|Line Numbers

   1. hFileXfer = InternetOpen("FileSession", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
   2. if(hFileXfer != 0)
   3.     hConnect = InternetConnect(hFileXfer, "localhost", 80, "", "", INTERNET_SERVICE_HTTP, 0,0);
   4.     if(hConnect != 0)
   5.     {
   6.         DWORD flags;
   7.         flags = INTERNET_FLAG_KEEP_CONNECTION | INTERNET_FLAG_NO_CACHE_WRITE | INTERNET_FLAG_PRAGMA_NOCACHE;
   8.         hReq = HttpOpenRequest(hConnect,"POST", "./TargetDir/ClientUpload.php", NULL, NULL, NULL, flags, 0);
   9.         if(hReq != 0)
  10.         {
  11.             if(HttpSendRequestEx(hReq, NULL, NULL,0, NULL))
  12.             {
  13.                 do
  14.                 {
  15.                     if(bRead = (bool)ReadFile(hSrcFile,&pBuffer, sizeof(pBuffer), &dwBytesRead, NULL))
  16.                     {
  17.                         if(!(bRtn =(bool)InternetWriteFile(hReq, pBuffer, dwBytesRead, &dwBytesWritten)))
  18.                         {
  19.                             DWORD DwError = GetLastError();
  20.                             *ErrStr = "Unable to write file to server";
  21.                             break;
  22.                         }
  23.                         dwTotalWritten += dwBytesWritten;
  24.                     }
  25.                     else
  26.                     {
  27.                         DWORD DwError = GetLastError();
  28.                         *ErrStr = "Error reading source file";
  29.                         bRtn = false;
  30.                         break;
  31.                     }
  32.                 } while(dwTotalWritten < dwFileSize);
  33.                 CloseHandle(hSrcFile);
  34.                 TCHAR            RtnBuffer[1000];
  35.                 DWORD            ret;
  36.                 bRtn = InternetReadFile(hReq, RtnBuffer, 1000, &ret);
  37.                 InternetCloseHandle(hReq);
  38.                 InternetCloseHandle(hConnect);
  39.                 InternetCloseHandle(hFileXfer);
  40.             }
  41.         }
  42.     }
  43. }

PHP code
Expand|Select|W rap|Line Numbers

   1. <?php
   2. $uploaddir = '/TargetDir/ClientUploads/';
   3. $uploadfile = $uploaddir . basename($_FILES['file']['name']);
   4.  
   5. echo '<pre>';
   6. if (move_uploaded_file($_FILES['file']['tmp_name'], $uploadfile)) {
   7.     echo "File is valid, and was successfully uploaded.\n";
   8. } else {
   9.     echo "Possible file upload attack!\n";
  10. }
  11.  
  12. echo 'Here is some more debugging info:';
  13. print_r($_FILES);
  14.  
  15. print "</pre>";
  16.  
  17. ?>

[Banfa]

What headers are you sending with your HTTP request? Because I believe at a minimum you will need to send "Content-Type: application/x-www-form-urlencoded" but I see no mention of it.

[wwhitman]

What you see is what I am sending or better 'trying to send'. I was not aware that I had to send a header.
I have tried this as well -except the content-type was different. I replaced the HttpOpenRequest call with the following:

csPost.Format("%s\r\n%s\r\n%s%d\r\n%s\r\n\r\n", 
		  "POST /ClientUpload.php HTTP/1.0",
		  "Content-type:application/x-www-form-urlencoded",
		  "Content-length:",dwFileSize,
		  "-- boundary");
hReq = HttpOpenRequest(hConnect,csPost, NULL, NULL, NULL, NULL, flags, 0);

The OpenRequest:csP ost contains:
POST /ClientUpload.ph p HTTP/1.0
Content-type:applicatio n/x-www-urlencoded
Content-length:26
--boundary
GetLastError returns 87(Message: The parameter is incorrect in function)
returned handle is NULL

[wwhitman]

I got the C++ side to execute without errors:
This is what I did:
on the HttpOpenRequest I passed "POST" and the server.php file name
then ran HttpSendRequest Ex() with NULL or 0
Passed the header in with a internetWriteFi le
followed by the file.
THANX to all for helping