Hi,
I'm using WinInet APIs in async mode to upload files to server using
HTTP protocol and "POST" request. As a matter of fact, I'm trying to
simulate HTML form (multipart data) submit button.
I can successfully send file, but I have problem with making progress
bar while uploading.
Here is code I'm using for sending:
Code:
------------------------------------------------------------------------------------------------------
while (dwReadLength != 0)
{
DWORD dwBytesSent = 0;
dwReadLength = fileLocal.Read(pBuffer, dwChunkLength);
if (dwReadLength != 0)
{
if (!InternetWriteFile(hInternetFile, pBuffer, dwReadLength,
&dwBytesWritten))
{
if (::GetLastError() != ERROR_IO_PENDING)
{
strError.Format("CFileHostingHttpUpload::UploadFile::InternetWriteFile(2)
= %d", ::GetLastError());
return FALSE;
}
WaitForSingleObject(hAsyncOp, INFINITE);
}
dwTotalRead+=dwBytesWritten;
pbUpload->SetPos(((double)dwTotalRead/
dwTotalRequestLength)*100);
}
}
------------------------------------------------------------------------------------------------------
The problem is that my progress bar gets fully "progressed" in about
1-2 seconds, but file uploading is far slower (25kb/s upload speed).
When I track transfer with net sniffer tool I can see that it takes
about 10 seconds to upload 256 kb file, but progress bar gets fill
almost instantly. I've tried about 6-7 different upload "loops" but
all of them are giving almost same result.
InternetStatusCallback gives me this:
------------------------------------------------------------------------------------------------------
11:49:19 - Connected to server.
11:49:19 - Sending request ...
11:49:19 - Request sent: 186 bytes
11:49:19 - Request complete.
11:49:19 - Sending request ...
11:49:19 - Request sent: 86 bytes
11:49:19 - Sending request ...
11:49:19 - Request sent: 4096 bytes
...
... (a lot of same status until the end of upload, no need to paste
them all :))
...
11:49:19 - Sending request ...
11:49:19 - Request sent: 4096 bytes
11:49:19 - Sending request ...
11:49:19 - Request sent: 4096 bytes
11:49:19 - Request complete.
11:49:19 - Sending request ...
11:49:19 - Request sent: 802 bytes
11:49:19 - Sending request ...
11:49:19 - Request sent: 16 bytes
11:49:19 - Receiving response ...
11:49:29 - Response received: 1024 bytes
11:49:29 -
11:49:29 - Request complete.
------------------------------------------------------------------------------------------------------
Does anybody have any kind of solution?
Best Regards and have a nice day!
