Cloudflare Developers•4mo ago

websocket request to durable object does not contain upgrade header

I have a weird issue. I deployed a project using durable objects to namespace.name.workers.dev and setup a worker route to a domain (ie. example.com) Everything works fine on the workers.dev domain, but when trying to connect to example.com it doesn't work with the error below. I've confirmed the browser is sending the header, but it's not being received by the fetch handler. Worker tried to return a WebSocket in a response to a request which did not contain the header "Upgrade: websocket"."

function handleApiRequest (request: Request, env: Env) {
  const id = env.do.idFromName('default')
  const roomObject = env.do.get(id)
  return roomObject.fetch(request) // new Request(request.url, request) also does not work
}

function handleApiRequest (request: Request, env: Env) {
  const id = env.do.idFromName('default')
  const roomObject = env.do.get(id)
  return roomObject.fetch(request) // new Request(request.url, request) also does not work
}

does anyone know why this isnt working?

6 Replies

KhafraOP•4mo ago

Chaika•4mo ago

In your website in Cloudflare, check under the "Network" tab if Websockets are enabled. Without websockets being enabled in CF, it strips the header.

KhafraOP•4mo ago

works perfectly, thank you! did I miss this in the docs somewhere?

Chaika•4mo ago

the network setting or what exactly? It's documented: https://developers.cloudflare.com/network/websockets/

Cloudflare Docs

WebSockets · Cloudflare Network settings docs

Cloudflare supports proxied WebSocket connections without additional configuration.

KhafraOP•4mo ago

under the durable objects docs, I would have never found the option

Chaika•4mo ago

oh idk, there's a few places in its docs where they are mentioned and the zone setting is only slightly related sometimes hard to place those things/for docs writers to remember everything. If you think it makes sense to have it in the docs at a specific spot under durable objects, you can make an issue or pr the docs repo in github

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websocket request to durable object does not contain upgrade header