esm: treat 307 and 308 as redirects in HTTPS imports

Per RFC 7231 and 7238, HTTP `307` and `308` status code are also for redirect responses. Fixes: nodejs#43679 Refs: https://datatracker.ietf.org/doc/html/rfc7231#section-6.4.7 Refs: https://datatracker.ietf.org/doc/html/rfc7238 PR-URL: nodejs#43689 Reviewed-By: Geoffrey Booth <[email protected]> Reviewed-By: Zijian Liu <[email protected]> Reviewed-By: LiviaMedeiros <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]> Reviewed-By: Jacob Smith <[email protected]>
lpinca · Jul 9, 2022 · 3d575a4 · 3d575a4
1 parent adef64c
commit 3d575a4
Showing 1 changed file with 24 additions and 3 deletions.
diff --git a/lib/internal/modules/esm/fetch_module.js b/lib/internal/modules/esm/fetch_module.js
@@ -89,6 +89,28 @@ function createUnzip() {
   return createUnzip();
 }
 
+/**
+ * Redirection status code as per section 6.4 of RFC 7231:
+ * https://datatracker.ietf.org/doc/html/rfc7231#section-6.4
+ * and RFC 7238:
+ * https://datatracker.ietf.org/doc/html/rfc7238
+ * @param {number} statusCode
+ * @returns {boolean}
+ */
+function isRedirect(statusCode) {
+  switch (statusCode) {
+    case 300: // Multiple Choices
+    case 301: // Moved Permanently
+    case 302: // Found
+    case 303: // See Other
+    case 307: // Temporary Redirect
+    case 308: // Permanent Redirect
+      return true;
+    default:
+      return false;
+  }
+}
+
 /**
  * @param {URL} parsed
  * @returns {Promise<CacheEntry> | CacheEntry}
@@ -107,9 +129,8 @@ function fetchWithRedirects(parsed) {
     // `finally` on network error/timeout.
     const { 0: res } = await once(req, 'response');
     try {
-      const isRedirect = res.statusCode >= 300 && res.statusCode <= 303;
       const hasLocation = ObjectPrototypeHasOwnProperty(res.headers, 'location');
-      if (isRedirect && hasLocation) {
+      if (isRedirect(res.statusCode) && hasLocation) {
         const location = new URL(res.headers.location, parsed);
         if (location.protocol !== 'http:' && location.protocol !== 'https:') {
           throw new ERR_NETWORK_IMPORT_DISALLOWED(
@@ -127,7 +148,7 @@ function fetchWithRedirects(parsed) {
         err.message = `Cannot find module '${parsed.href}', HTTP 404`;
         throw err;
       }
-      if (res.statusCode > 303 || res.statusCode < 200) {
+      if (res.statusCode < 200 || res.statusCode >= 400) {
         throw new ERR_NETWORK_IMPORT_DISALLOWED(
           res.headers.location,
           parsed.href,