[Server] Fix bug

package.json

@@ -39,6 +39,7 @@
     "@types/gulp-util": "3.0.30",
     "@types/inquirer": "0.0.32",
     "@types/is-root": "1.0.0",
+    "@types/is-url": "1.2.28",
     "@types/js-yaml": "3.5.29",
     "@types/mongodb": "2.1.36",
     "@types/ms": "0.7.29",
@@ -95,6 +96,7 @@
     "gulp-util": "3.0.8",
     "inquirer": "2.0.0",
     "is-root": "1.0.0",
+    "is-url": "1.2.2",
     "js-yaml": "3.7.0",
     "livescript": "1.5.0",
     "mime-types": "2.1.13",

src/web/service/proxy/proxy.ts

 import * as URL from 'url';
 import * as express from 'express';
 import * as request from 'request';
+import * as isUrl from 'is-url';
 
 module.exports = (req: express.Request, res: express.Response) => {
 	const url = req.params.url;
 
-	if (!url) {
+	if (!url || !isUrl(url)) {
 		return;
 	}