Fix & refactor server routing + add tests (#799)

* Fix bad routing regex for sitemap & feed

* add tests for sitemap & feed

* use next middleware function if file nto found

* add pages routing & test

* refactor + add more test for page routing

* extension-less url routing + test

* refactor out requestFile

* add dot routing + test to handle special case like http://localhost:3000/blog/2018/05/27/1.13.0

* exit properly

* add more test for sitemap

* update nits from my phone

lib/core/routing.js

@@ -4,17 +4,47 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  */
-const escapeStringRegexp = require('escape-string-regexp');
-
-function docsRouting(baseUrl) {
-  return new RegExp(`^${escapeStringRegexp(baseUrl)}docs\/.*html$`);
-}
+const escape = require('escape-string-regexp');
 
 function blogRouting(baseUrl) {
-  return new RegExp(`^${escapeStringRegexp(baseUrl)}blog\/.*html$`);
+  return new RegExp(`^${escape(baseUrl)}blog\/.*html$`);
+}
+
+function docsRouting(baseUrl) {
+  return new RegExp(`^${escape(baseUrl)}docs\/.*html$`);
+}
+
+function dotRouting() {
+  return /(?!.*html$)^\/.*\.[^\n\/]+$/;
+}
+
+function feedRouting(baseUrl) {
+  return new RegExp(`^${escape(baseUrl)}blog\/(feed\.xml|atom\.xml)$`);
+}
+
+function noExtRouting() {
+  return /\/[^\.]*\/?$/;
+}
+
+function pageRouting(baseUrl) {
+  const gr = regex => regex.toString().replace(/(^\/|\/$)/gm, '');
+  return new RegExp(
+    `(?!${gr(docsRouting(baseUrl))}|${gr(blogRouting(baseUrl))})^${escape(
+      baseUrl
+    )}.*\.html$`
+  );
+}
+
+function sitemapRouting(baseUrl) {
+  return new RegExp(`^${escape(baseUrl)}sitemap.xml$`);
 }
 
 module.exports = {
-  docsRouting,
   blogRouting,
+  docsRouting,
+  dotRouting,
+  feedRouting,
+  pageRouting,
+  noExtRouting,
+  sitemapRouting,
 };