Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Allow to customize Access-Control-Allow-Headers passed to matchmake endpoint

See original GitHub issue

The value is currently static here: https://github.com/colyseus/colyseus/blob/bdf43169e509e0fd2305cd4a3b3669e7bf733c76/packages/core/src/Server.ts#L236-L247

If you use an instrumentation library (such as newrelic) it may add new headers , right now this is broken

Steps to Reproduce (for bugs)

Enable any instrumentation library that add new headers to allow for CORS tracing
Matchmake does not work anymore as we requested more headers than what was returned

See screenshot:

Notice the requested headers (Access-Control-Request-Headers) and the ones returned in the response (Access-Control-Allow-Headers)

Context

Trying to enable the NewRelic browser monitoring agent

Your Environment

Colyseus Version: v0.14.20
Node.js Version: v14
Operating System and version: Ubuntu

Issue Analytics

State:
Created 2 years ago
Comments:8 (3 by maintainers)

Top GitHub Comments

1reaction

endelcommented, Jun 17, 2022

Hi @JCMais, this has been taken care of on the upcoming 0.15 version 🤞 https://github.com/colyseus/colyseus/blob/3d6624239fa89e856aea2d1b82ac49d8647aedbb/packages/transport/uwebsockets-transport/src/uWebSocketsTransport.ts#L179

1reaction

JCMaiscommented, Jun 16, 2022

@endel I saw you added a way to configure it, ty for that!

I noticed a similar change needs to be done to the uWebSocketsTransport, as it handles the cors headers separately.

Top Results From Across the Web

Access-Control-Allow-Headers - HTTP - MDN Web Docs

The Access-Control-Allow-Headers response header is used in ... It indicates that a custom header named X-Custom-Header is supported by CORS ...

Access-Control-Allow-Headers is set but impossible to get ...

On the server side, this custom response header was added in the Access-Control-Allow-Headers header. Applied response headers.

Configuring CORS - Apollo GraphQL Docs

The Access-Control-Allow-Origin header (ACAO) enables a server to dictate which origins can use scripts to access that server's resources. Depending on what you ......

Add custom header to Access-Control-Allow-Headers - Support

The Access-Control-Allow-Headers response header is used in response to a preflight request which includes the Access-Control-Request-Headers to ...

The Access-Control-Allow-Origin Header Explained

Access-Control-Allow-Origin is a CORS header. CORS, or Cross Origin Resource Sharing, is a mechanism for browsers to let a site running at ...