Error occurs while making a request to the Google API using $.ajax

Question

Error occurs while making a request to the Google API using $.ajax

I am currently developing an angular application that includes a section for public transportation. I am trying to integrate directions from the Google API, and while the URL seems valid - returning JSON when entered in a browser - I encounter an error when using $.ajax.

URL

http://maps.googleapis.com/maps/api/directions/json?
origin=Assenede,%20Belgi%C3%AB&destination=Industrieweg%20232,Gent-
Mariakerke,belgium&sensor=false&departure_time=1343641500&mode=transit

Angular Controller Function

$scope.getDirections = function(){

        var directions_url = "http://maps.googleapis.com/maps/api/directions/json" +
         "?origin=" + $scope.details.formatted_address +
         "&destination=Industrieweg 232,Gent-Mariakerke,belgium" +
         "&sensor=false" + 
         "&departure_time=1343641500"+
         "&mode=transit";

         console.log(directions_url);

        $.ajax({
            type:"GET",
            dataType:"json",
            contentType:"application/jsonp",
            url: directions_url,
            success:function(data){
                alert(data);
            },
            error:function(xhr, status, error){
                console.log('error:' + status + error);
            }
        });
     }

If anyone has a solution to this issue, your input would be greatly appreciated.

Thank you. HS.

javascript ajax angularjs

Answer 1

Answer №1

The issue arises from the incorrect setting of the dataType, which is essential for utilizing JSONP. This could lead to the following error message (assuming jQuery is being used):

No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.

Even after correcting the code as shown below:

var url = "http://maps.googleapis.com/maps/api/directions/json?origin=Assenede,%20Belgi%C3%AB&destination=Industrieweg%232,Gent-Mariakerke,belgium&sensor=false&departure_time=1343641500&mode=transit";

$.ajax({
    dataType:"jsonp",
    url: url,
    success:function(data){
        alert(data);
    },
    error:function(xhr, status, error){
        console.log('error:' + status + error);
    }
});

An additional error may occur:

Uncaught SyntaxError: Unexpected token : json:2
error:parsererrorError: jQuery110209881844320334494_1387726816235 was not called

This implies that the server (Google in this case) is sending regular JSON instead of the expected JSONP format. It is advisable, as mentioned by David, to reassess your approach and consider alternative methods of accessing the Google API (such as utilizing Google Maps JavaScript API).

Answer 2

The issue arises from the incorrect setting of the dataType, which is essential for utilizing JSONP. This could lead to the following error message (assuming jQuery is being used):

No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.

Even after correcting the code as shown below:

var url = "http://maps.googleapis.com/maps/api/directions/json?origin=Assenede,%20Belgi%C3%AB&destination=Industrieweg%232,Gent-Mariakerke,belgium&sensor=false&departure_time=1343641500&mode=transit";

$.ajax({
    dataType:"jsonp",
    url: url,
    success:function(data){
        alert(data);
    },
    error:function(xhr, status, error){
        console.log('error:' + status + error);
    }
});

An additional error may occur:

Uncaught SyntaxError: Unexpected token : json:2
error:parsererrorError: jQuery110209881844320334494_1387726816235 was not called

This implies that the server (Google in this case) is sending regular JSON instead of the expected JSONP format. It is advisable, as mentioned by David, to reassess your approach and consider alternative methods of accessing the Google API (such as utilizing Google Maps JavaScript API).

Answer 3

Answer №2

When accessing that specific URL, it provides plain JSON which requires the use of JSONP for cross-origin requests. It is uncertain whether Google supports a JSONP option for maps, so exploring alternatives like CORS or a server-side proxy could be beneficial.

Answer 4

When accessing that specific URL, it provides plain JSON which requires the use of JSONP for cross-origin requests. It is uncertain whether Google supports a JSONP option for maps, so exploring alternatives like CORS or a server-side proxy could be beneficial.

Error occurs while making a request to the Google API using $.ajax

URL

Angular Controller Function

Answer №1

Answer №2

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