C++ client upload to PHP server

[wwhitman]

I'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

hFileXfer = InternetOpen("FileSession", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
if(hFileXfer != 0)
    hConnect = InternetConnect(hFileXfer, "localhost", 80, "", "", INTERNET_SERVICE_HTTP, 0,0);
    if(hConnect != 0)
    {
        DWORD flags;
        flags = INTERNET_FLAG_KEEP_CONNECTION | INTERNET_FLAG_NO_CACHE_WRITE | INTERNET_FLAG_PRAGMA_NOCACHE;
        hReq = HttpOpenRequest(hConnect,"POST", "./TargetDir/ClientUpload.php", NULL, NULL, NULL, flags, 0);
        if(hReq != 0)
        {
            if(HttpSendRequestEx(hReq, NULL, NULL,0, NULL))
            {
                do
                {
                    if(bRead = (bool)ReadFile(hSrcFile,&pBuffer, sizeof(pBuffer), &dwBytesRead, NULL))
                    {
                        if(!(bRtn =(bool)InternetWriteFile(hReq, pBuffer, dwBytesRead, &dwBytesWritten)))
                        {
                            DWORD DwError = GetLastError();
                            *ErrStr = "Unable to write file to server";
                            break;
                        }
                        dwTotalWritten += dwBytesWritten;
                    }
                    else
                    {
                        DWORD DwError = GetLastError();
                        *ErrStr = "Error reading source file";
                        bRtn = false;
                        break;
                    }
                } while(dwTotalWritten < dwFileSize);
                CloseHandle(hSrcFile);
                TCHAR            RtnBuffer[1000];
                DWORD            ret;
                bRtn = InternetReadFile(hReq, RtnBuffer, 1000, &ret);
                InternetCloseHandle(hReq);
                InternetCloseHandle(hConnect);
                InternetCloseHandle(hFileXfer);
            }
        }
    }
}

PHP code

<?php
$uploaddir = '/TargetDir/ClientUploads/';
$uploadfile = $uploaddir . basename($_FILES['file']['name']);
 
echo '<pre>';
if (move_uploaded_file($_FILES['file']['tmp_name'], $uploadfile)) {
    echo "File is valid, and was successfully uploaded.\n";
} else {
    echo "Possible file upload attack!\n";
}
 
echo 'Here is some more debugging info:';
print_r($_FILES);
 
print "</pre>";
 
?>

[Markus]

What output do you get? Any PHP errors?

[wwhitman]

Appears I get nothing from PHP side. I am not even sure it gets activated. I think I remember putting in some code on the PHP to write to an MySQL Db and nothing appeared, and it was the first thing I did

[Markus]

Unfortunately I am out of ideas for this :/
I know squat about C++.

Maybe someone else will be able to help.

[wwhitman]

UPDATE: I think I got the C++ side working. I can go through the code and no errors are reported. The PHP script gets executed but there is no file there

$connection = mysql_connect('localhost','root',''); // or die('Error: ' . mysql_error()); 
if(!$connection)
   $StatusStr = 'DatabaseError';
else
{
   mysql_select_db("watchdog", $connection);
   $sql = "INSERT INTO testTbl ( TestSeen) VALUES ( '1')";
   $Result = mysql_query($sql);
}
$uploaddir = 'ClientUploads/';
if(empty($_FILES["uploaded_file"]))
{
    $sql = "INSERT INTO testTbl ( TestSeen) VALUES ( 'EMPTY')";
    $Result = mysql_query($sql);
}
 

In the table I see 1 followed by EMPTY

[Markus]

I'm not sure you're able to send a file like that and have PHP recognise it. Does C++ have access to a cURL library?

[wwhitman]

NOPE.
This should work.
I get no errors on the C++ side.

[Markus]

If there is no data in the FILES array, then your C++ application is not submitting the data correctly.