Enhance error message on unknown cartodb username

Closes #126

NEWS.md

@@ -2,6 +2,7 @@
 ------------------
 
 * Add 'user_from_host' directive to generalize username extraction (#124)
+* Enhance error message on unknown cartodb username (#126)
 
 1.7.1 - 2013-12-02
 ------------------

app/controllers/app.js

@@ -197,7 +197,8 @@ function handleQuery(req, res) {
                 if (err) {
                   // If the database could not be found, the user is non-existant
                   if ( err.message.match('missing') ) {
-                    err.message = "Sorry, we can't find this CartoDB. Please check that you have entered the correct domain.";
+                    err.message = "Sorry, we can't find CartoDB user '" + cdbuser
+                      + "'. Please check that you have entered the correct domain.";
                     err.http_status = 404;
                   }
                   throw err;

test/acceptance/app.test.js

@@ -902,7 +902,7 @@ test('GET decent error if domain is incorrect', function(done){
         assert.deepEqual(res.headers['content-type'], 'application/json; charset=utf-8');
         assert.deepEqual(res.headers['content-disposition'], 'inline');
         var result = JSON.parse(res.body);
-        assert.equal(result.error[0],"Sorry, we can't find this CartoDB. Please check that you have entered the correct domain.");
+        assert.equal(result.error[0],"Sorry, we can't find CartoDB user 'vizzualinot'. Please check that you have entered the correct domain.");
         done();
     });
 });