Added basepath scanner

Signed-off-by: James Ketrenos <james_gitlab@ketrenos.com>

server/routes/basepath.js

@@ -0,0 +1,33 @@
+"use strict";
+
+const express = require("express"),
+  fs = require("fs"),
+  url = require("url");
+
+const router = express.Router();
+
+/* This router only handles HTML files and is used
+ * to replace BASEPATH */
+router.get("/*", function(req, res, next) {
+  const parts = url.parse(req.url),
+    basePath = req.app.get("basePath");
+
+  if (!/\/[^/]+\.html$/.exec(parts.pathname)) {
+    return next();
+  }
+
+  console.log("Attempting to parse 'frontend" + parts.pathname + "'");
+
+  /* Replace <script>'<base href="/BASEPATH/">';</script> in index.html with
+   * the basePath */
+  fs.readFile("frontend" + parts.pathname, "utf8", function(error, content) {
+    if (error) {
+      return next();
+    }
+    res.send(content.replace(
+      /<script>'<base href="BASEPATH">';<\/script>/,
+      "<base href='" + basePath + "'>"));
+  });
+});
+
+module.exports = router;