HttpSendRequest not posting correct

Question

I am making a simple POST request using WinInet to an apache web server. I encode the data using base 64. The problem is that, every + character gets replaced by space character.

Why is that and how can I make correct POST request.

hInternet = InternetOpen(NULL, INTERNETOPENTYPEPRECONFIG, NULL, NULL, 0);
if (hInternet)
{
    hConnect = InternetConnect(hInternet, szDomain, INTERNETDEFAULTHTTPPORT, NULL, NULL, INTERNETSERVICEHTTP, 0, dwTmp);
    if (hConnect)
    {
        hRequest = HttpOpenRequest(hConnect, szPost, szExfiltrationURL, NULL, NULL,(char *)accept, INTERNETFLAGNOCACHEWRITE | INTERNETFLAGNOCOOKIES | INTERNETFLAGNOUI | INTERNETFLAGRELOAD, 0);
        if (hRequest)
        {
            HttpSendRequest(hRequest, headers, lstrlen(headers), buffer, buflen);
            InternetCloseHandle(hRequest);
        }

        InternetCloseHandle(hConnect);
    }

    InternetCloseHandle(hInternet);
}

Why are you encoding data as base64 in the first place? A POST body can contain unencoded binary data. And in a POST request, your data should be in the body and not in the URL. — Remy Lebeau
– Remy Lebeau, Commented Aug 1, 2014 at 15:45

Jude Pereira · Accepted Answer · 2014-08-01 14:22:02Z

4

From W3

"Within the query string, the plus sign is reserved as shorthand notation for a space:

Source: "http://www.w3.org/Addressing/URL/4_URI_Recommentations.html"

answered Aug 1, 2014 at 14:22

Jude Pereira

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1 Comment

Jude Pereira Over a year ago

You can use percent encoding. w3schools.com/tags/ref_urlencode.asp So '+' becomes %2B.

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