CODEWITHSUNDEEP
apachewebsocket
Florian Metzger-Noel
Florian Metzger-Noel

Reputation: 952

Apache2 can't set headers "Connection" and "Upgrade"

I'm working on setting up a websocket connection through a reverse_proxy. I finally have a working config for Nginx, but I would prefer to use Apache2.

These are the needed config lines in Nginx:

proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";

I tried to translate them to Apache2, but it doesn't seem to work:

<If "%{HTTP:upgrade} == 'websocket'">
  RequestHeader add Upgrade "websocket"
</If>
RequestHeader set Connection "upgrade"

Apache2 just ignores these commands..When I change the header names they're not ignored anymore, but that doesn't help me:

RequestHeader set X-Connection "upgrade"

So: Apache2 seems to ignore changes to "Upgrade" and "Connection" headers.

(I'm working with a debugging server that prints all HTTP requests received with all their headers - so I can directly compare Nginx and Apache2 requests - and therefore I know that Apache2 is ignoring my command.)

How can I make this work in Apache2?

Upvotes: 3

Views: 5014

Answers (1)

Florian Metzger-Noel
Florian Metzger-Noel

Reputation: 952

Found a solution myself: Apache doesn't allow to set these headers - instead you need to use the rewrite engine: 

RewriteEngine On
RewriteCond %{HTTP:Connection} Upgrade [NC]
RewriteCond %{HTTP:Upgrade} websocket [NC]
RewriteRule /(.*) ws://127.0.0.1:3000/$1 [P,L]

Apache will then automatically add the correct "Upgrade" and "Connection" headers.

Upvotes: 10

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