(MFC) Initialize an HTTP Request from a URL

Demonstrates how to initialize an HTTP request object from a URL.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkHttpRequest.h>

void ChilkatSample(void)
    {
    CkString strOut;

    CkHttpRequest req;

    // Loads the HTTP request object from a URL
    req.SetFromUrl("https://www.youtube.com/watch?v=fAZdTchQePc&t=45s");

    // The verb will be "GET"
    strOut.append("verb = ");
    strOut.append(req.httpVerb());
    strOut.append("\r\n");
    // The path will be "/watch"
    strOut.append("path = ");
    strOut.append(req.path());
    strOut.append("\r\n");

    // The output of this loop will be
    // 0) v: fAZdTchQePc
    // 1) t: 45s
    int i;
    int numParams = req.get_NumParams();
    for (i = 0; i <= numParams - 1; i++) {
        strOut.appendInt(i);
        strOut.append(") ");
        strOut.append(req.getParamName(i));
        strOut.append(": ");
        strOut.append(req.getParamValue(i));
        strOut.append("\r\n");
    }

    // View the request that would be sent if SynchronousRequest is called.
    // The HTTP request will be a GET that looks like this:
    // 
    //     GET /watch?v=fAZdTchQePc&t=45s HTTP/1.1
    //     Host: domain
    // 
    // Note: The HOST header will automatically get filled in with the actual domain when SynchronousRequest is called.

    strOut.append(req.generateRequestText());
    strOut.append("\r\n");

    // We can add additional params
    req.AddParam("artist","Richard Bona");
    req.AddParam("musicType","Jazz");
    req.AddParam("festival","Estival Jazz Lugano");
    req.AddParam("year","2008");

    // Now examine the request that would be sent
    // 
    //     GET /watch?v=fAZdTchQePc&t=45s&artist=Richard%20Bona&musicType=Jazz&festival=Estival%20Jazz%20Lugano&year=2008 HTTP/1.1
    //     Host: domain
    // 
    strOut.append(req.generateRequestText());
    strOut.append("\r\n");

    // We can remove a parameter:
    req.RemoveParam("t");
    strOut.append(req.generateRequestText());
    strOut.append("\r\n");

    // What happens if we change the request from a GET to a POST?
    req.put_HttpVerb("POST");
    // The request will now look like this:
    // 
    //    POST /watch HTTP/1.1
    //    Host: domain
    //    Content-Length: 93
    //    
    //    v=fAZdTchQePc&artist=Richard%20Bona&musicType=Jazz&festival=Estival%20Jazz%20Lugano&year=2008
    // 
    strOut.append(req.generateRequestText());
    strOut.append("\r\n");

    // What happens if we make it a multipart/form-data?
    req.put_ContentType("multipart/form-data");
    // Now the POST looks like this:
    //    
    //    POST /watch HTTP/1.1
    //    Content-Type: multipart/form-data; boundary=------------020906020106050705030807
    //    Host: domain
    //    Content-Length: 545
    //    
    //    --------------020906020106050705030807
    //    Content-Disposition: form-data; name="v"
    //    
    //    fAZdTchQePc
    //    --------------020906020106050705030807
    //    Content-Disposition: form-data; name="artist"
    //    
    //    Richard Bona
    //    --------------020906020106050705030807
    //    Content-Disposition: form-data; name="musicType"
    //    
    //    Jazz
    //    --------------020906020106050705030807
    //    Content-Disposition: form-data; name="festival"
    //    
    //    Estival Jazz Lugano
    //    --------------020906020106050705030807
    //    Content-Disposition: form-data; name="year"
    //    
    //    2008
    //    --------------020906020106050705030807--

    strOut.append(req.generateRequestText());
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }