I'm attempting to upgrade a WSS request on Varnish 4 via Nginx.
[varnish]
sub vcl_recv {
if (req.http.Upgrade ~ "(?i)websocket") {
return (pipe);
}
}
sub vcl_pipe {
if (req.http.upgrade) {
set bereq.http.upgrade = req.http.upgrade;
}
}
[nginx]
server {
listen 8080 default_server;
location /socket {
proxy_pass http://127.0.0.1:8081;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
}
When initiating a WSS connection the request fails with "426 Upgrade header
MUST be provided", although the header is provided by the client.
When forcing the Upgrade header in Nginx:
proxy_set_header Upgrade "websocket";
The request passes to the backend and produces a new connection, the client
however does not receive a response back and times out.
Is there anything i can do to debug this further?
Thank you and regards,
Olivier
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