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wininet: Fix behavior of InternetQueryDataAvailable if INTERNET_FLAG_ASYNC is set.

This commit is contained in:
Misha Koshelev 2007-07-15 16:32:57 -05:00 committed by Alexandre Julliard
parent fc48d6da73
commit 663c0146a5
1 changed files with 67 additions and 12 deletions
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79
dlls/wininet/internet.c
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@ -3251,10 +3251,40 @@ lend:
* Determines how much data is available to be read.
*
* RETURNS
* If there is data available then TRUE, otherwise if there
* is not or an error occurred then FALSE. Use GetLastError() to
* check for ERROR_NO_MORE_FILES to see if it was the former.
* TRUE on success, FALSE if an error occurred. If
* INTERNET_FLAG_ASYNC was specified in InternetOpen, and
* no data is presently available, FALSE is returned with
* the last error ERROR_IO_PENDING; a callback with status
* INTERNET_STATUS_REQUEST_COMPLETE will be sent when more
* data is available.
*/
void AsyncInternetQueryDataAvailableProc(WORKREQUEST *workRequest)
{
LPWININETHTTPREQW lpwhr;
INTERNET_ASYNC_RESULT iar;
char buffer[4048];
TRACE("INTERNETQUERYDATAAVAILABLE %p\n", workRequest->hdr);
switch (workRequest->hdr->htype)
{
case WH_HHTTPREQ:
lpwhr = (LPWININETHTTPREQW)workRequest->hdr;
iar.dwResult = NETCON_recv(&lpwhr->netConnection, buffer,
min(sizeof(buffer),
lpwhr->dwContentLength - lpwhr->dwContentRead),
MSG_PEEK, (int *)&iar.dwError);
INTERNET_SendCallback(workRequest->hdr, workRequest->hdr->dwContext,
INTERNET_STATUS_REQUEST_COMPLETE, &iar,
sizeof(INTERNET_ASYNC_RESULT));
break;
default:
FIXME("unsupported file type\n");
break;
}
}
BOOL WINAPI InternetQueryDataAvailable( HINTERNET hFile,
LPDWORD lpdwNumberOfBytesAvailble,
DWORD dwFlags, DWORD dwConext)
@ -3278,20 +3308,45 @@ BOOL WINAPI InternetQueryDataAvailable( HINTERNET hFile,
if (NETCON_query_data_available(&lpwhr->netConnection,
lpdwNumberOfBytesAvailble))
{
if (!*lpdwNumberOfBytesAvailble &&
!NETCON_recv(&lpwhr->netConnection, buffer,
min(sizeof(buffer), lpwhr->dwContentLength - lpwhr->dwContentRead),
MSG_PEEK, (int *)lpdwNumberOfBytesAvailble))
{
INTERNET_SetLastError(ERROR_NO_MORE_FILES);
retval = FALSE;
}
retval = TRUE;
if (!*lpdwNumberOfBytesAvailble)
{
/* Even if we are in async mode, we need to determine whether
* there is actually more data available. We do this by trying
* to peek only a single byte in async mode. */
BOOL async = (lpwhr->lpHttpSession->lpAppInfo->hdr.dwFlags & INTERNET_FLAG_ASYNC);
if (!NETCON_recv(&lpwhr->netConnection, buffer,
async ? 1 : min(sizeof(buffer),
lpwhr->dwContentLength - lpwhr->dwContentRead),
MSG_PEEK, (int *)lpdwNumberOfBytesAvailble))
{
INTERNET_SetLastError(ERROR_NO_MORE_FILES);
retval = FALSE;
}
else if (async && *lpdwNumberOfBytesAvailble)
{
WORKREQUEST workRequest;
*lpdwNumberOfBytesAvailble = 0;
workRequest.asyncproc = AsyncInternetQueryDataAvailableProc;
workRequest.hdr = WININET_AddRef( &lpwhr->hdr );
retval = INTERNET_AsyncCall(&workRequest);
if (!retval)
{
WININET_Release( &lpwhr->hdr );
}
else
{
INTERNET_SetLastError(ERROR_IO_PENDING);
retval = FALSE;
}
}
}
}
else
{
INTERNET_SetLastError(ERROR_NO_MORE_FILES);
retval = FALSE;
}
break;