Remove unneeded req params related to the URL

modules/middleware/validatePackagePathname.js

@@ -0,0 +1,19 @@
+import parsePackagePathname from '../utils/parsePackagePathname.js';
+
+/**
+ * Parse the pathname in the URL. Reject invalid URLs.
+ */
+export default function validatePackagePathname(req, res, next) {
+  const parsed = parsePackagePathname(req.path);
+
+  if (parsed == null) {
+    return res.status(403).send({ error: `Invalid URL: ${req.path}` });
+  }
+
+  req.packageName = parsed.packageName;
+  req.packageVersion = parsed.packageVersion;
+  req.packageSpec = parsed.packageSpec;
+  req.filename = parsed.filename;
+
+  next();
+}