External Server communication with HTTP requests

Hello,

I need support for the communication with external services like Google Maps API.

The following code and websites includes my concerns.

At first I want to get a google map with a HTTP request.

The following website shows the information for my intention.

https://developers.google.com/maps/documentation/staticmaps/?hl=en

How can I get Google Maps over HTTP requests?

Another point is the geocoding API from google. 

https://developers.google.com/maps/documentation/geocoding/

I want to get information with the geoCodeStr.

I tried this string with my browser and get information which you can see under the HTTP request code.

The problem of my project is that I get no response.

The status code is 0.

I hope someone can give me some advice?

Thanks.

String geoCodeStr= URL.encode("http://maps.googleapis.com/maps/api/geocode/json?address=1600+Amphitheatre+Parkway,+Mountain+View,+CA&sensor=false");

requestBuilder = new RequestBuilder(RequestBuilder.GET, geoCodeStr);

try {

requestBuilder.sendRequest(null,

new RequestCallback() {

public void onError(Request request, Throwable exception) {

Window.alert("Request timeout or no connection to server: "

+ exception.getMessage());

}

public void onResponseReceived(Request request,

Response response) {

System.out.println(response.getHeadersAsString());

System.out.println(response.getText());

if (200 == response.getStatusCode()) {

System.out.println(response.getText());

} else {

Window.alert(""+response.getStatusText());

}

System.out.println(Integer.toString(response.getStatusCode()));

}

});

} catch (RequestException e) {

Window.alert("No connection with server: "+e.getMessage());

}

}

{     "results" : [        {           "address_components" : [              {                 "long_name" : "1600",                 "short_name" : "1600",                 "types" : [ "street_number" ]              },              {                 "long_name" : "Amphitheatre Pkwy",                 "short_name" : "Amphitheatre Pkwy",                 "types" : [ "route" ]              },

...

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