Remove unneeded req params related to the URL

modules/utils/parsePackagePathname.js

@@ -0,0 +1,26 @@
+const packagePathnameFormat = /^\/((?:@[^/@]+\/)?[^/@]+)(?:@([^/]+))?(\/.*)?$/;
+
+export default function parsePackagePathname(pathname) {
+  try {
+    pathname = decodeURIComponent(pathname);
+  } catch (error) {
+    return null;
+  }
+
+  const match = packagePathnameFormat.exec(pathname);
+
+  // Disallow invalid pathnames.
+  if (match == null) return null;
+
+  const packageName = match[1];
+  const packageVersion = match[2] || 'latest';
+  const filename = (match[3] || '').replace(/\/\/+/g, '/');
+
+  return {
+    // If the pathname is /@scope/name@version/file.js:
+    packageName, // @scope/name
+    packageVersion, // version
+    packageSpec: `${packageName}@${packageVersion}`, // @scope/name@version
+    filename // /file.js
+  };
+}