Break up parseURL middleware

server/middleware/redirectLegacyURLs.js

@@ -0,0 +1,23 @@
+const createSearch = require("./utils/createSearch");
+
+/**
+ * Redirect old URLs that we no longer support.
+ */
+function redirectLegacyURLs(req, res, next) {
+  // Permanently redirect /_meta/path to /path?meta.
+  if (req.path.match(/^\/_meta\//)) {
+    req.query.meta = "";
+    return res.redirect(301, req.path.substr(6) + createSearch(req.query));
+  }
+
+  // Permanently redirect /path?json => /path?meta
+  if (req.query.json != null) {
+    delete req.query.json;
+    req.query.meta = "";
+    return res.redirect(301, req.path + createSearch(req.query));
+  }
+
+  next();
+}
+
+module.exports = redirectLegacyURLs;