Rename server => modules

modules/utils/parsePackageURL.js

@@ -0,0 +1,41 @@
+const url = require("url");
+
+const packageURLFormat = /^\/((?:@[^/@]+\/)?[^/@]+)(?:@([^/]+))?(\/.*)?$/;
+
+function decodeParam(param) {
+  if (param) {
+    try {
+      return decodeURIComponent(param);
+    } catch (error) {
+      // Ignore invalid params.
+    }
+  }
+
+  return "";
+}
+
+function parsePackageURL(originalURL) {
+  const { pathname, search, query } = url.parse(originalURL, true);
+  const match = packageURLFormat.exec(pathname);
+
+  // Disallow invalid URL formats.
+  if (match == null) {
+    return null;
+  }
+
+  const packageName = match[1];
+  const packageVersion = decodeParam(match[2]) || "latest";
+  const filename = decodeParam(match[3]);
+
+  return {
+    // If the URL is /@scope/name@version/file.js?main=browser:
+    pathname, // /@scope/name@version/path.js
+    search: search || "", // ?main=browser
+    query, // { main: 'browser' }
+    packageName, // @scope/name
+    packageVersion, // version
+    filename // /file.js
+  };
+}
+
+module.exports = parsePackageURL;