chore(middleware-sdk-s3): add status code 400 for S3 region redirects (#6572)

* chore(middleware-sdk-s3): add status code 400 for redirects

* chore(middleware-sdk-s3): add error code check

* chore(middleware-sdk-s3): re-add comment for PermanentRedirect

Author: siddsriv

packages/middleware-sdk-s3/src/region-redirect-middleware.spec.ts

@@ -18,6 +18,18 @@ describe(regionRedirectMiddleware.name, () => {
     return null as any;
   };
 
+  const next400 = (arg: any) => {
+    if (call === 0) {
+      call++;
+      throw Object.assign(new Error(), {
+        name: "IllegalLocationConstraintException",
+        $metadata: { httpStatusCode: 400 },
+        $response: { headers: { "x-amz-bucket-region": redirectRegion } },
+      });
+    }
+    return null as any;
+  };
+
   beforeEach(() => {
     call = 0;
   });
@@ -30,6 +42,14 @@ describe(regionRedirectMiddleware.name, () => {
     expect(context.__s3RegionRedirect).toEqual(redirectRegion);
   });
 
+  it("set S3 region redirect on context if receiving an error with status 400", async () => {
+    const middleware = regionRedirectMiddleware({ region, followRegionRedirects: true });
+    const context = {} as HandlerExecutionContext;
+    const handler = middleware(next400, context);
+    await handler({ input: null });
+    expect(context.__s3RegionRedirect).toEqual(redirectRegion);
+  });
+
   it("does not follow the redirect when followRegionRedirects is false", async () => {
     const middleware = regionRedirectMiddleware({ region, followRegionRedirects: false });
     const context = {} as HandlerExecutionContext;

packages/middleware-sdk-s3/src/region-redirect-middleware.ts

@@ -35,22 +35,23 @@ export function regionRedirectMiddleware(clientConfig: PreviouslyResolved): Init
       try {
         return await next(args);
       } catch (err) {
-        if (
-          clientConfig.followRegionRedirects &&
-          // err.name === "PermanentRedirect" && --> removing the error name check, as that allows for HEAD operations (which have the 301 status code, but not the same error name) to be covered for region redirection as well
-          err?.$metadata?.httpStatusCode === 301
-        ) {
-          try {
-            const actualRegion = err.$response.headers["x-amz-bucket-region"];
-            context.logger?.debug(`Redirecting from ${await clientConfig.region()} to ${actualRegion}`);
-            context.__s3RegionRedirect = actualRegion;
-          } catch (e) {
-            throw new Error("Region redirect failed: " + e);
+        if (clientConfig.followRegionRedirects) {
+          if (
+            err?.$metadata?.httpStatusCode === 301 ||
+            // err.name === "PermanentRedirect" && --> removing the error name check, as that allows for HEAD operations (which have the 301 status code, but not the same error name) to be covered for region redirection as well
+            (err?.$metadata?.httpStatusCode === 400 && err?.name === "IllegalLocationConstraintException")
+          ) {
+            try {
+              const actualRegion = err.$response.headers["x-amz-bucket-region"];
+              context.logger?.debug(`Redirecting from ${await clientConfig.region()} to ${actualRegion}`);
+              context.__s3RegionRedirect = actualRegion;
+            } catch (e) {
+              throw new Error("Region redirect failed: " + e);
+            }
+            return next(args);
           }
-          return next(args);
-        } else {
-          throw err;
         }
+        throw err;
       }
     };
 }