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  • winhttp post request

    From Safi Ullah Warraich@21:1/5 to All on Tue Apr 27 04:49:29 2021
    On Tuesday, 12 November 2002 at 02:17:39 UTC+5, Stephen Sulzer [Microsoft] wrote:
    Hello Gigino,
    I think the problem is the WinHttpSendRequest call:
    // Send a request.
    if (hRequest)
    bResults =WinHttpSendRequest(hRequest,
    WINHTTP_NO_ADDITIONAL_HEADERS , 0,
    "CS=friuli", 18, 18,
    0);
    This code is posting a 9 byte string, but specifies that the length is 18 bytes. It should use 9 instead, as the payload is a 9-byte ANSI string, not
    a wide-character Unicode string. Sending the string as single-byte ANSI is the correct thing to do. The dwOptionalLength and dwTotalLength parameters must specify the length of the data in bytes.
    WinHTTP will use the dwTotalLength parameter to generate the Content-Length header. So the server is expecting 18 bytes of data, and this would cause
    the timeout error.
    Also, when calling the WinHttpAddRequestHeaders function, you do not need
    the \r\n characters at the end of the string, so the following is
    sufficient:
    bResults=WinHttpAddRequestHeaders(hRequest,
    L"Content-Type: application/x-www-form-urlencoded",
    -1L, WINHTTP_ADDREQ_FLAG_ADD);

    Hope that helps.
    Regards,
    Stephen Sulzer
    Microsoft Corporation
    This posting is provided "AS IS" with no warranties, and confers no rights. "Gigino" <realth...@yahoo.it> wrote in message news:18b07ef0.02111...@posting.google.com...
    "Stephen Sulzer \(Microsoft\)" <ssu...@online.microsoft.com> wrote in
    message news:<OQtF2hrhCHA.1392@tkmsftngp12>...
    Hello,

    Are you using the WinHTTP Win32 API or the WinHttpRequest COM component?

    Can you post an example of your code please?


    Regards,

    Stephen Sulzer
    Microsoft Corporation


    This posting is provided "AS IS" with no warranties, and confers no
    rights.



    "gigino" <invisibil...@yahoo.it> wrote in message news:5ffb01c28448$7cebb8d0$36ef2ecf@tkmsftngxa12...
    can someone please show me a sample code of a post request
    in c++ with winhttp? I've followed all instructions but i
    wasn't able to make it work...




    I'm using the Winhttp win32 API; the segment of code i wrote to post
    data to a server is the following; i followed an example of winhttp
    help in which there was only the download of an html page and i've
    made the changes i thought i needed to post data, but it doesn't
    work...
    "CS=friuli" is the string i want to post, the page is www.myservarname.it/rs/find.asp; the error i get is 12002 (timeout),
    but the problem seems to be the post... if i only read the page
    without posting data, there is no problem.
    Thank you for any help
    Gigino

    Hi Stephen,
    i am having an issue with the POST API my API seems to work ok as when i send data from postman it works absolutely fine but when i send the data from c++ it doesn't post any thing as there is a key whose value is quite long
    here is my code below if you can help me
    wstrURL+=L"Id=";
    wstrURL += _id;//after this concatinate id provided
    wstrURL+=L"&Email=";
    wstrURL+=Email;//add email here
    wstrURL+=L"&Public_Key=";
    wstrURL+=_publicKey;//add public key
    wstrURL += L"&Private_Key=";
    wstrURL +=_privateKey; //add private key
    //wstrURL += L"Content-Type: application/x-www-form-urlencoded\r\n";
    WinHttpClient* pHttpClient = NULL;
    pHttpClient = new WinHttpClient(wstrURL);
    if (pHttpClient == NULL)
    {
    return;
    }
    LPCWSTR additionalHeaders = L"Content-Type: application/x-www-form-urlencoded\r\n";
    //pHttpClient->SetAdditionalRequestHeaders(additionalHeaders);
    pHttpClient->SendHttpRequest(L"POST",additionalHeaders);

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