CODEWITHSUNDEEP
c++winapitimeout
Mike Beaton
Mike Beaton

Reputation: 184

How do I configure the timeout on HttpEndRequest?

Background: I'm maintaining an old C++ app that communicates with my company's servers. No one at the company (including me) has any significant experience with C++ or with many of the other technologies being used.

The problem: I am trying to upload a file with code that looks like this:

if(HttpSendRequestEx(hReq, &InBuf, NULL, HSR_INITIATE, 0))
{
    unsigned long ulWrote;
    BOOL bWrote;
    bWrote = InternetWriteFile(hReq, postData, postDataLength, &ulWrote);

    if(bWrote)
    {
        if(!HttpEndRequest(hReq, NULL, 0, 0))
        {
            DWORD errorCode = GetLastError(); // 12002 - timeout
        }
    }
}

There's lots of other error-handling going on here, but I've stripped it down to where I'm seeing a problem.

Small files will upload without a problem, larger files (~25MB) are encountering a timeout. Even though the timeout is occurring, many times the file will upload successfully, so I don't think it's a problem on the server side. Just suppressing or ignoring the error seems wrong but I haven't found any way to set the timeout to a more reasonable level.

Upvotes: 2

Views: 1073

Answers (1)

Alex K.
Alex K.

Reputation: 175826

WININET provides InternetSetOption() to control its behaviour, in your case look at the the INTERNET_OPTION_SEND_TIMEOUT flag.

Upvotes: 3

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