(C) 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.

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#include <C_CkHttpResponse.h>
#include <C_CkXml.h>
#include <C_CkHttp.h>
#include <C_CkTask.h>
#include <C_CkHttpRequest.h>

void http_TaskCompleted(HCkTask completedTask)
    {
    HCkHttpResponse resp;
    BOOL success;
    HCkXml xmlResponse;
    // 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 (CkTask_getStatusInt(completedTask) != 7) {
        printf("Task did not complete.\n");
        printf("task status: %s\n",CkTask_status(completedTask));
        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.
    resp = CkHttpResponse_Create();

    success = CkHttpResponse_LoadTaskResult(resp,completedTask);
    if (success != TRUE) {
        printf("%s\n",CkHttpResponse_lastErrorText(resp));
        CkHttpResponse_Dispose(resp);
        return;
    }

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

    printf("status code: %d\n",CkHttpResponse_getStatusCode(resp));
    printf("response header: %s\n",CkHttpResponse_header(resp));

    xmlResponse = CkXml_Create();
    CkXml_LoadXml(xmlResponse,CkHttpResponse_bodyStr(resp));
    printf("%s\n",CkXml_getXml(xmlResponse));
    }

void ChilkatSample(void)
    {
    HCkHttp http;
    void (*fnhttpTaskCompleted)(HCkTask completedTask) = http_TaskCompleted;
    BOOL success;
    HCkXml soapXml;
    HCkHttpRequest req;
    HCkTask task;

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

    http = CkHttp_Create();
    CkHttp_setTaskCompleted(http, fnhttpTaskCompleted);

    soapXml = CkXml_Create();

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

    CkXml_NewChild2(soapXml,"soap12:Body","");
    CkXml_GetChild2(soapXml,0);
    CkXml_NewChild2(soapXml,"GetCityWeatherByZIP","");
    CkXml_GetChild2(soapXml,0);
    CkXml_AddAttribute(soapXml,"xmlns","http://ws.cdyne.com/WeatherWS/");
    CkXml_NewChild2(soapXml,"ZIP","60187");
    CkXml_GetRoot2(soapXml);

    printf("%s\n",CkXml_getXml(soapXml));

    req = CkHttpRequest_Create();
    CkHttpRequest_putHttpVerb(req,"POST");
    CkHttpRequest_putSendCharset(req,FALSE);
    CkHttpRequest_AddHeader(req,"Content-Type","application/soap+xml; charset=utf-8");
    CkHttpRequest_AddHeader(req,"SOAPAction","http://ws.cdyne.com/WeatherWS/GetCityWeatherByZIP");
    CkHttpRequest_putPath(req,"/WeatherWS/Weather.asmx");
    CkHttpRequest_LoadBodyFromString(req,CkXml_getXml(soapXml),"utf-8");

    CkHttp_putFollowRedirects(http,TRUE);

    task = CkHttp_SynchronousRequestAsync(http,"wsf.cdyne.com",80,FALSE,req);
    if (CkHttp_getLastMethodSuccess(http) != TRUE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttpResponse_Dispose(resp);
        CkXml_Dispose(xmlResponse);
        CkHttp_Dispose(http);
        CkXml_Dispose(soapXml);
        CkHttpRequest_Dispose(req);
        return;
    }

    // Schedule the task for running on the thread pool.  This changes the task's state
    // from Inert to Live.
    success = CkTask_Run(task);
    if (success != TRUE) {
        printf("%s\n",CkTask_lastErrorText(task));
        CkTask_Dispose(task);
        CkHttpResponse_Dispose(resp);
        CkXml_Dispose(xmlResponse);
        CkHttp_Dispose(http);
        CkXml_Dispose(soapXml);
        CkHttpRequest_Dispose(req);
        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.
    CkTask_Dispose(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.


    CkHttpResponse_Dispose(resp);
    CkXml_Dispose(xmlResponse);
    CkHttp_Dispose(http);
    CkXml_Dispose(soapXml);
    CkHttpRequest_Dispose(req);

    }