(MFC) Asynchronous HTTP SOAP 1.2 Request and Response using POST

Demonstrates a working asynchronous SOAP 1.2 request and response using POST with a live server. You may try running this example with the URLs and data provided. See http://wsf.cdyne.com/WeatherWS/Weather.asmx?op=GetCityWeatherByZIP for details.

Note: This example is correct in theory, but no longer works for live testing because the SOAP service provider (cdyne.com) has made changes or discontinued the free service.

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

See Also: Using MFC CString in Chilkat

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

#include <CkHttpProgress.h>

class httpProgress : public CkHttpProgress {

  public:
  httpProgress() { }
  virtual ~httpProgress() { }

  void TaskCompleted(CkTask &completedTask) {
    // A finished task could be one that was canceled, aborted, or truly finished.  

    // If the task was "canceled", it was canceled prior to actually starting.  This could
    // happen if the task was canceled while waiting in a thread pool queue to be scheduled by Chilkat's
    // background thread pool scheduler.  

    // If the task was "aborted", it indicates that it was canceled while running in a background thread.  
    // The ResultErrorText will likely indicate that the task was aborted.

    // If the task "completed", then it ran to completion, but the actual success/failure of the method
    // is determined by the result obtained via a GetResult* method.  (A "completed" task will
    // have a StatusInt equal to 7.   If the task finished, but was not completed, then it must've
    // been aborted or canceled:
    if (completedTask.get_StatusInt() != 7) {
        strOut.append("Task did not complete.");
        strOut.append("\r\n");
        strOut.append("task status: ");
        strOut.append(completedTask.status());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // The synchronous call to QuickGetObj would return an HTTP response object.  To get this 
    // response object for the async call, we instantiate a new/empty HTTP response object,
    // and then load it from the completed task.
    CkHttpResponse resp;

    bool success = resp.LoadTaskResult(completedTask);
    if (success != true) {
        strOut.append(resp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Now that we have the response, we can get all of the information:

    strOut.append("status code: ");
    strOut.appendInt(resp.get_StatusCode());
    strOut.append("\r\n");
    strOut.append("response header: ");
    strOut.append(resp.header());
    strOut.append("\r\n");

    CkXml xmlResponse;
    xmlResponse.LoadXml(resp.bodyStr());
    strOut.append(xmlResponse.getXml());
    strOut.append("\r\n");
  }

};

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkHttp http;
    httpProgress http_progress;
    http.put_EventCallbackObject(&http_progress);
    bool success;

    CkXml soapXml;

    soapXml.put_Tag("soap12:Envelope");
    soapXml.AddAttribute("xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance");
    soapXml.AddAttribute("xmlns:xsd","http://www.w3.org/2001/XMLSchema");
    soapXml.AddAttribute("xmlns:soap12","http://www.w3.org/2003/05/soap-envelope");

    soapXml.NewChild2("soap12:Body","");
    soapXml.GetChild2(0);
    soapXml.NewChild2("GetCityWeatherByZIP","");
    soapXml.GetChild2(0);
    soapXml.AddAttribute("xmlns","http://ws.cdyne.com/WeatherWS/");
    soapXml.NewChild2("ZIP","60187");
    soapXml.GetRoot2();

    strOut.append(soapXml.getXml());
    strOut.append("\r\n");

    CkHttpRequest req;
    req.put_HttpVerb("POST");
    req.put_SendCharset(false);
    req.AddHeader("Content-Type","application/soap+xml; charset=utf-8");
    req.AddHeader("SOAPAction","http://ws.cdyne.com/WeatherWS/GetCityWeatherByZIP");
    req.put_Path("/WeatherWS/Weather.asmx");
    req.LoadBodyFromString(soapXml.getXml(),"utf-8");

    http.put_FollowRedirects(true);

    CkTask *task = http.SynchronousRequestAsync("wsf.cdyne.com",80,false,req);
    if (http.get_LastMethodSuccess() != true) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Schedule the task for running on the thread pool.  This changes the task's state
    // from Inert to Live.
    success = task->Run();
    if (success != true) {
        strOut.append(task->lastErrorText());
        strOut.append("\r\n");
        delete task;
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // The application is now free to do anything else
    // while the HTTP request is in progress.  When the task
    // is completed, the TaskCompleted method is called.
    delete task;

    // -------------------------------------------------------------------------------
    // The following is a general note that applies to all programming languages:
    // -------------------------------------------------------------------------------

    // NOTE: This is very important:  The TaskCompleted callback runs in the background thread.  
    // (All callbacks from an async task, such as AbortCheck, PercentDone, ProgressInfo, etc. are in the background thread.) 
    // An application that uses TaskCompleted must be very careful.  
    // For example, user interface elements (such as labels, text boxes, etc.) may not be directly
    // accessible from a background thread, and could crash the application if directly accessed.  Also, attempting to debug
    // code running in a background thread from an IDE, especially an older IDE (such as VB6) is likely to crash the IDE.


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }