Add a way to block some urls to avoid spam (#219)

Spam blocker

lib/server/controllers/apiController.js

@@ -23,6 +23,13 @@ var ApiController = function(app) {
             req.body.url = 'http://' + req.body.url;
         }
 
+        // Block requests to unwanted websites (=spam)
+        if (isBlocked(req.body.url)) {
+            console.error('Test blocked for URL: %s', req.body.url);
+            res.status(403).send('Forbidden');
+            return;
+        }
+
         // Grab the test parameters and generate a random run ID
         var run = {
             runId: (Date.now()*1000 + Math.round(Math.random()*1000)).toString(36),
@@ -86,6 +93,7 @@ var ApiController = function(app) {
             return ylt(run.params.url, runOptions);
 
         })
+
         // Phantomas completed, let's save the screenshot if any
         .then(function(data) {
 
@@ -327,6 +335,15 @@ var ApiController = function(app) {
             });
     });
 
+    function isBlocked(url) {
+        if (!serverSettings.blockedUrls) {
+            return false;
+        }
+
+        return serverSettings.blockedUrls.some(function(blockedUrl) {
+            return (url.indexOf(blockedUrl) === 0);
+        });
+    }
 };
 
 module.exports = ApiController;