[connectors/http] prevent errors caused by multi-byte characters in paths (#756)

* [connectors/http] catch errors caused by multi-byte paths

* Check url validity before to run the request

* Updated test

test/unit/specs/http_connector.js

@@ -230,6 +230,17 @@ describe('Http Connector', function () {
         done();
       });
     });
+
+    it('calls back with error when http.request throws an error', function (done) {
+      var con = new HttpConnection(new Host('http://google.com/thisisinvalid\uffe2'));
+
+      stub(con.log, 'error');
+
+      con.request({}, function (err) {
+        expect(err.message).to.eql('ERR_UNESCAPED_CHARACTERS: /thisisinvalid\uffe2');
+        done();
+      });
+    });
   });
 
   describe('#request with incomming message error', function () {