netty: Websocket connections fails when headers are case sensitive

Trying to access a third party web application having websocket connections through spring cloud gateway

All http requests are success but websocket connections fails with io.netty.handler.codec.http.websocketx.WebSocketClientHandshakeException: Invalid handshake response getStatus: 404

While examining the packets observed that request headers are sent in lower case letters (upgrade, connection and sec-websocket-key) from netty > io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker13

headers.set(HttpHeaderNames.UPGRADE, HttpHeaderValues.WEBSOCKET).set(HttpHeaderNames.CONNECTION, HttpHeaderValues.UPGRADE).set(HttpHeaderNames.SEC_WEBSOCKET_KEY, key);

Unfortunately the third party web application I am trying to access is expecting case sensitive headers. Is there a way I can override these headers?

Netty version : reactor-netty 1.0.8

JDK 1.8

OS : Ubuntu 20.04

About this issue

Original URL
State: closed
Created 3 years ago
Comments: 16 (8 by maintainers)

Most upvoted comments

@slandelle @hyperxpro I had reported it to their technical team. In my scenario this third party application can be from vendors. So just want to make sure it doesn’t break even if it is not fixed in their end.

In my opinion the third party component that violates the RFC should be fixed

violetagg on Jul 6, 2021

@Jerry29 You should report this issue to the broken third party application so they fix it instead of trying to fork the valid implementation in Netty.

slandelle on Jul 6, 2021

Drop me an email. Lemme help you of-the-track. 😃

hyperxpro on Jul 9, 2021

@violetagg I raised a different issue for that https://github.com/spring-cloud/spring-cloud-gateway/issues/2289

Jerry29 on Jul 7, 2021