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JavaScript Build a Simple Dynamic Site with Node.js HTTP Methods and Headers Dealing with the POST Body

Posted by Laxmikanta Nayak
.a{fill-rule:evenodd;}techdegree
Laxmikanta Nayak
Front End Web Development Techdegree Student 554 Points

I want to get the complete response of asynchronous request and want to use that in other functions

please have alook to the function below : getLocationName to see my question in detail

var http=require('http');
var body='';
var prettyJson={};
var locationName='';
var temperature='';
var pressure='';
var humidity='';
var parsedBody='';
function getWeatherReport(country){
    var request=http.get("http://api.apixu.com/v1/current.json?key=5fccf98036ed460abb8195912162406&q="+country,function(response){
        response.on("data",function(chunk){
            body+=chunk;
        });
        response.on("end",function(){
        prettyJson=JSON.parse(body);
                getLocationName(prettyJson);
    },"2000");


        });
        response.on("error",function(error){
            console.error(error);
        });

    });


}
function  getLocationName(){
    console.log(prettyJson);
//i want to use this object in all other pages  but the error i am facing is :
"i cant able to get the complete response as it is an async call"//
}
module.exports.getWeatherReport=getWeatherReport;
module.exports.getLocationName=getLocationName;

2 Answers

Thomas Nilsen
Thomas Nilsen
14,957 Points
Thomas Nilsen
Thomas Nilsen
14,957 Points

You could add a callback to your function, that would look like this:

var http    = require('http');
var url     = 'http://api.apixu.com/v1/current.json?key=5fccf98036ed460abb8195912162406&q=';


function getWeatherReport(country, callback) {
    var data = null;
    http.get(url + country, function(response) {
        response.on('data', function(chunk) {
            data += chunk;
        });

        response.on('end', function() {
            callback(null, data);
        });
    }).end('error', function(err) {
        callback(err, null);
    });
}


module.exports = getWeatherReport;

And when you want to use this in another file you write:

var weather = require('weather');

weather('norway', function(err, data) {
    console.log(data);
});
Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

You have a couple of options:

  • you can call your other functions from inside the handler where the value is available to be passed.
  • during the handler you can store the value into a global variable that other functions can access.
Laxmikanta Nayak
.a{fill-rule:evenodd;}techdegree
Laxmikanta Nayak
Front End Web Development Techdegree Student 554 Points

Thanks Steven for your answer. But in that case also the full response i am not getting it is only a chunk i am getting , can you please write the code you are talking about that would be really helpful steven.