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Do you need app.options and app.use(cors()); ?? #277
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Hello, and sorry you are having trouble. To answer your question, if you are using |
Hi, What other options should we pursue if the client is still failing? This is the Chrome error (real web address changed) : 'https://sampleapi.com/me' from origin 'https://sampleeapp.com' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' Any help on this would be appreciated! thanks. |
Same issue with me, are you using an API gateway? |
If yes, you can check if there's any solution provided by the infrastructure documentation for CORS. |
No, I have a NodeJS instance running solo. I do use the AWS gateway API and no CORS issues there. Will send the account that is having issues a link to one of those CORS test websites. I have done everything on the server side at this point! |
@sinclas It would be interesting to see the problematic preflight request and its response. |
@sinclas I am having similar issues. Any updates? I actually can see that my server is not providing the "allow-control-access-origin" header. This only happened when I enabled credentials. I also have this issue with edge, firefox, and chrome" |
Same here |
@sinclas We are having this exact issue. Did you manage to get around it? |
any update on this ? thanks! |
access to fetch at 'https://localhost:3000' from origin 'localhost:5000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled. |
Hi guys, i managed to get a solution to this issue by adding a lib called cors. This is my express controller of auth methods. The provided code demonstrates how the origin key in the corsOptions object is utilized to specify the correct origin, which is set to localhost:3000 in this instance. However, it's important to note that in your specific scenario, this origin value is likely to differ. You should tailor it to match the website for which you are encountering CORS preflight issues. import express, { Response } from 'express';
import AuthController from '../../controllers/auth';
import cors from 'cors';
const corsOptions = {
origin: "http://localhost:3000",
optionsSuccessStatus: 200, // some legacy browsers (IE11, various SmartTVs) choke on 204
};
export const AuthRouter = () => {
const router = express.Router();
// Auth
router.use('/', express.json());
router.use('/', express.urlencoded({ extended: true }));
router.use('/signin', cors(corsOptions));
router.post('/signin', AuthController.signIn);
return router;
}; What you guys need to test before going to browser, is if the OPTIONS method return all the things you guys need. In my case, was just the allow origin that was missing. As we can see here in the Insomnia |
Hi,
I have a client that is getting a CORS error for preflight. So, we added the"app.options", in addition to the app.use. Do we need to add both for all routes? (nodeJS with Express).
Code in the main JS file in node. This is executed prior to any routes:
Is this redundant? Will the second line cause the preflight to fail or are both necessary? We have a client that is failing the preflight with both Chrome and Edge.
Thanks!
Steve
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