Http Calls

Http Calls

Http calls are performed with the help of classes provided by Data Flow.

Example

A sample call to accuweather that gets the air temperature of İstanbul and uses this information to send an event would be as follows:

var request = new SimpleHttpRequest();	
request.url = "https://dataservice.accuweather.com/currentconditions/v1/318251?apikey=write_your_apikey_here";
var credentialId = "";	
 new HttpAgent().call(
     request, 
     credentialId,
     function(response){
		if (200 != response.httpStatusCode)
		{
            return;
        }
        nodeBase.log(LogLevel.info, "weather response : " + JSON.stringify(response));
        var weatherJson = JSON.parse(response.body);
        var degrees = weatherJson[0].Temperature.Metric.Value;
        nodeBase.log(LogLevel.info, degrees + " C degrees");

        var outData = { "degrees": degrees, "city": cityName };
        var eventInformation = new EventInformation(
            channelIndex, 
            "accuweather", 
            "weather", 
            outData,
            eventInformation.StartSampleIndex, 
            eventInformation.EndSampleIndex
        )
        raiseEvent(eventInformation);
     }
);

SimpleHttpRequest

SimpleHttpRequest is the http request object we use with HttpAgent.

Properties

HttpAgent

HttpAgent is the class provided by Data Flow for custom nodes' http client needs.

call

HttpAgent has the method call that performs an async http request.

call(simpleHttpRequest, credentialId, responseListener)

Parameters:

SimpleHttpResponse

SimpleHttpResponse is the http response object we use with HttpAgent.

Properties