fix(lambda-at-edge): fix redirect loop in Next 10.0.4 and up due to new internal redirect regexes (#879)

Author: dphang

packages/libs/lambda-at-edge/src/routing/redirector.ts

@@ -20,6 +20,11 @@ export function isTrailingSlashRedirect(
   redirect: RedirectData,
   basePath: string
 ) {
+  // Remove internal trailing slash redirects (in Next.js 10.0.4 and up)
+  if (redirect.internal === true) {
+    return true;
+  }
+
   if (basePath !== "") {
     return (
       (redirect.statusCode === 308 &&

packages/libs/lambda-at-edge/src/types.ts

@@ -127,6 +127,7 @@ export type RedirectData = {
   source: string;
   destination: string;
   regex: string;
+  internal?: boolean;
 };
 
 export type RewriteData = {