(MFC) HTTP POST JSON

Demonstrates how to send a JSON POST and get the JSON response.

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

See Also: Using MFC CString in Chilkat

#include <CkHttpRequest.h>
#include <CkHttp.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code

    CkHttpRequest req;
    CkHttp http;

    bool success;

    // This example duplicates the HTTP POST shown at
    // http://json.org/JSONRequest.html

    // Specifically, the request to be sent looks like this:

    // POST /request HTTP/1.1
    // Accept: application/jsonrequest
    // Content-Encoding: identity
    // Content-Length: 72
    // Content-Type: application/jsonrequest
    // Host: json.penzance.org
    // 
    // {"user":"doctoravatar@penzance.com","forecast":7,"t":"vlIj","zip":94089}

    // First, remove default header fields that would be automatically
    // sent.  (These headers are harmless, and shouldn't need to 
    // be suppressed, but just in case...)
    http.put_AcceptCharset("");
    http.put_UserAgent("");
    http.put_AcceptLanguage("");
    // Suppress the Accept-Encoding header by disallowing 
    // a gzip response:
    http.put_AllowGzip(false);

    // If a Cookie needs to be added..
    http.SetRequestHeader("Cookie","JSESSIONID=1234");

    const char *jsonText = "{\"user\":\"doctoravatar@penzance.com\",\"forecast\":7,\"t\":\"vlIj\",\"zip\":94089}";

    // To use SSL/TLS, simply use "https://" in the URL.

    // IMPORTANT: Make sure to change the URL, JSON text,
    // and other data items to your own values.  The URL used
    // in this example will not actually work.

    CkHttpResponse *resp = 0;
    resp = http.PostJson("http://json.penzance.org/request",jsonText);
    if (http.get_LastMethodSuccess() != true) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
    }
    else {
        // Display the JSON response.
        strOut.append(resp->bodyStr());
        strOut.append("\r\n");
        delete resp;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }