ch19: added Google geocoding utility.

Author: EthanRBrown

ch19/lib/geocode.js

@@ -0,0 +1,25 @@
+var http = require('http');
+
+module.exports = function(query, cb){
+
+    var options = {
+        hostname: 'maps.googleapis.com',
+        path: '/maps/api/geocode/json?address=' +
+            encodeURIComponent(query) + '&sensor=false',
+    };
+
+    http.request(options, function(res){
+        var data = '';
+        res.on('data', function(chunk){
+            data += chunk;
+        });
+        res.on('end', function(){
+            data = JSON.parse(data);
+            if(data.results.length){
+                cb(null, data.results[0].geometry.location);
+            } else {
+                cb("No results found.", null);
+            }
+        });
+    }).end();
+};