Informational post: Using voltmx.net library to perform services calls directly from an Iris application to JSON / XML backend service

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Hello Team,

Please find below a sample code to use voltmx.net library to perform services calls directly from an Iris application to JSON / XML backend services.

  serviceCall : function () {
    voltmx.print ("Entering into serviceCall");
    //XML service URL
    var url = 'https://rss.nytimes.com/services/xml/rss/nyt/world.xml';
    //JSON service URL
    //var url = 'https://api.openweathermap.org/data/2.5/weather?q=Seattle&appid=7fd82bbcddf7fca658e257db4c6577f3';

    var request = new voltmx.net.HttpRequest ();
    request.onReadyStateChange = onReadyStateChange;
    //Use this responseType when expecting to receive a XML as response
    request.responseType = constants.HTTP_RESPONSE_TYPE_DOCUMENT;
    //Use this responseType when expecting to receive a JSON as response
    //request.responseType = constants.HTTP_RESPONSE_TYPE_JSON;
    request.open (constants.HTTP_METHOD_GET, url, true);
    //Use this Content-Type when interacting with a XML backend service
	request.setRequestHeader ("Content-Type", 'application/xml');
    //Use this Content-Type when interacting with a JSON backend service
    //request.setRequestHeader ("Content-Type", 'application/json');
    request.send ();
    voltmx.print ("Exiting out of serviceCall");

    function onReadyStateChange () {
      voltmx.print ("Entering into onReadyStateChange");

      if (this.readyState === constants.HTTP_READY_STATE_DONE) {
        voltmx.print('readyState ::' + this.readyState);
        voltmx.print('responseType ::' + this.responseType);
        //Use this code to print the XML response received from backend service
        voltmx.print('response ::' + new XMLSerializer().serializeToString(this.response.documentElement));
        //Use this code to print the JSON response received from backend service
        //voltmx.print('response ::' + JSON.stringify(this.response));

        //Use this code to alert the XML response received from backend service
        alert("Response : "+new XMLSerializer().serializeToString(this.response.documentElement));
        //Use this code to alert the JSON response received from backend service
        //alert("Response : "+JSON.stringify(this.response));
      }
      voltmx.print ("Exiting out of onReadyStateChange");
    }  
  }

Thanks and Regards,
Venkata Raju Bankapalli

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