Renew the weather example with OpenWeatherMap service.

Google "secret" Weather API is shutdown. Let's use the crowd-sourced
OpenWeatherMap to supply the weather data (albeit there is no forecast
available).

http://code.google.com/p/phantomjs/issues/detail?id=794

examples/weather.coffee

@@ -0,0 +1,29 @@
+page = require('webpage').create()
+system = require 'system'
+
+city = 'Mountain View, California'; # default
+if system.args.length > 1
+    city = Array.prototype.slice.call(system.args, 1).join(' ')
+url = encodeURI 'http://api.openweathermap.org/data/2.1/find/name?q=' + city
+
+console.log 'Checking weather condition for', city, '...'
+
+page.open url, (status) ->
+    if status isnt 'success'
+        console.log 'Error: Unable to access network!'
+    else
+        result = page.evaluate ->
+            return document.body.innerText
+        try
+            data = JSON.parse result
+            data = data.list[0]
+            console.log ''
+            console.log 'City:',  data.name
+            console.log 'Condition:', data.weather.map (entry) ->
+                return entry.main
+            console.log 'Temperature:', Math.round(data.main.temp - 273.15), 'C'
+            console.log 'Humidity:', Math.round(data.main.humidity), '%'
+        catch e
+           console.log 'Error:', e.toString()
+
+    phantom.exit()

examples/weather.js

@@ -0,0 +1,37 @@
+var page = require('webpage').create(),
+    system = require('system'),
+    city,
+    url;
+
+city = 'Mountain View, California'; // default
+if (system.args.length > 1) {
+    city = Array.prototype.slice.call(system.args, 1).join(' ');
+}
+url = encodeURI('http://api.openweathermap.org/data/2.1/find/name?q=' + city);
+
+console.log('Checking weather condition for', city, '...');
+
+page.open(url, function(status) {
+    var result, data;
+    if (status !== 'success') {
+        console.log('Error: Unable to access network!');
+    } else {
+        result = page.evaluate(function () {
+            return document.body.innerText;
+        });
+        try {
+            data = JSON.parse(result);
+            data = data.list[0];
+            console.log('');
+            console.log('City:', data.name);
+            console.log('Condition:', data.weather.map(function(entry) {
+                return entry.main;
+            }).join(', '));
+            console.log('Temperature:', Math.round(data.main.temp - 273.15), 'C');
+            console.log('Humidity:', Math.round(data.main.humidity), '%');
+        } catch (e) {
+            console.log('Error:', e.toString());
+        }
+    }
+    phantom.exit();
+});