enable-cors.org | Advocacy for CORS | REST library

I have found a simple jQuery snippet that pulls information from an external website. However, I am struggling to convert it to run purely on JavaScript. I think I am on the right path, but I am not sure how to filter the pulled information and display only the text inside the h1 tag. I would be really grateful if someone can help out or provide me with a hint to what should I do next. Thank you in advance!

This is the jQuery code that is fully functional:

I have two Symfony server instances. First is on 127.0.0.1:8080, second is on 127.0.0.1:8081.

When I'm trying to send POST method from the second instance to the first instance, using url 127.0.0.1:8081/create, I receive HTTP 500.

I'm using Windows 10. Running the servers locally works without a problem. The POST method works perfectly. So that's mean there is some problem with a Docker, but I don't know where. Is it CORS problem?

Here is my docker-compose.yml in the first instance:

I am developing a nginx server to work as a reverse proxy to a local webapp only when user is authenticated. Here is my nginx myconfiguration.conf flie inside etc/nginx/sites-enabled/:

I have been trying to perform some authentication with passport-ci-oidc and node.js. In previous variant I used passport-idaas-openidconnect and all works fine for me. And now I'm getting the following error:

I'm working on building a web application that communicates with a Laravell API through an Nginx server. I tried following the directions on the Nginx website for wide open cors, but it doesn't like the wild card response when sending credentials.

Access to fetch at 'https://api.***.com/' from origin 'http://localhost:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '' when the request's credentials mode is 'include'.

The API server requires a Bearer access token to authenticate, and each endpoint is at its own path on the server. What is the correct way to configure Nginx in this scenario?

I followed this tutorial https://www.positronx.io/angular-8-mean-stack-tutorial-build-crud-angular-material/ to create a MEAN app

My express API works via curl and data successfully populates the mongo database. My angular front end also works in a live browser using nginx as the server. I am also able to proxy_pass to use express to serve the angular STATIC files directly.

When I try to POST data into a form from the browser I get an error saying ERR_CONNECTION_REFUSED. I have been stuck on this for a few days and not sure how I can resolve this. I suspect the issue is with my nginx file or /sites-available/default file, given that curl works in the command line.

My key files are:

/etc/nginx/sites-available/default:

I'm using SAM to create an API in cloudformation.

QUESTION: Where in my SAM application template do I add the 'X-Requested-With' header? How can I edit my code so that the preflight will succeed without me having to go into the AWS console?

PROBLEM: I'm working with my preflight request and when I deploy my SAM application I get 403 FORBIDDEN in postman and when I go to the AWS console the header 'X-Requested-With' is not present.

If I try to just add the 'X-Requested-With' header afterward in the console it still gives the error, BUT if I delete the OPTIONS method in the console and create the OPTIONS method from scratch according to (https://enable-cors.org/server_awsapigateway.html) it works and I get a 200 OK in postman.

CODE:

template.yaml

1) I have had my react app hosted in a S3 bucket served by Cloudfront with a custom domain.

2) Then I have my Express API server live on a Lightsail instance with Nginx/PM2.

Now I'm having 422 CORS issue when calling an endpoint from my React. I have tried the following:

1) Add the following CORS rules to the S3 bucket that contains my React app assets: