Google Geolocation Strongloop Datasource

datasources.json

"geo": {
    "name": "geo",
    "connector": "rest",
    "operations": [
      {
        "template": {
          "method": "GET",
          "url": "http://maps.googleapis.com/maps/api/geocode/{format=json}",
          "headers": {
            "accepts": "application/json",
            "content-type": "application/json"
          },
          "query": {
            "address": "{street},{city},{zipcode}",
            "sensor": "{sensor=false}"
          },
          "responsePath": "$.results[0].geometry.location"
        },
        "functions": {
          "geocode": [
            "street",
            "city",
            "zipcode"
          ]
        }
      }
    ]
  }

Here's how to call it from a Strongloop model with a vow promise

// Google Maps API has a rate limit of 10 requests per second
  // Seems we need to enforce a lower rate to prevent errors
  var lookupGeo = require('function-rate-limit')(5, 1000, function() {
    var geoService = Model.app.dataSources.geo;
    geoService.geocode.apply(geoService, arguments);
  });

  function getGeo(address){
    var deferred = vow.defer();
     lookupGeo(address.street, address.city, address.zip, function(err, result) {
         if (result && result.length) {
           deferred.resolve( [result[0].lng,result[0].lat] );
         } else {
           deferred.reject( 'No Geo Found' );
         }
       });
    return deferred.promise();
  }