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Apache reverse proxy

Here are configuration examples for setting up apache as reverse proxy for gotify/server.

The following modules are required:

• mod_proxy
• mod_proxy_wstunnel
• mod_proxy_http

Proxy requests

<VirtualHost *:80>
    ServerName domain.tld

    Keepalive On

    # The proxy must preserve the host because gotify verifies the host with the origin
    # for WebSocket connections
    ProxyPreserveHost On

    # Proxy web socket requests to /stream
    ProxyPass "/stream" ws://127.0.0.1:GOTIFY_PORT/stream retry=0 timeout=60

    # Proxy all other requests to /
    ProxyPass "/" http://127.0.0.1:GOTIFY_PORT/ retry=0 timeout=5

    ProxyPassReverse / http://127.0.0.1:GOTIFY_PORT/
</VirtualHost>

Proxy requests with sub path

<VirtualHost *:80>
    ServerName domain.tld
    Keepalive On

    Redirect 301 "/gotify" "/gotify/"

    # The proxy must preserve the host because gotify verifies the host with the origin
    # for WebSocket connections
    ProxyPreserveHost On

    # Proxy web socket requests to /stream
    ProxyPass "/gotify/stream" ws://127.0.0.1:GOTIFY_PORT/stream retry=0 timeout=60

    # Proxy all other requests to /
    ProxyPass "/gotify/" http://127.0.0.1:GOTIFY_PORT/ retry=0 timeout=5
    #                 ^- !!trailing slash is required!!

    ProxyPassReverse /gotify/ http://127.0.0.1:GOTIFY_PORT/
</VirtualHost>

Troubleshooting

With some additional Apache configuration, the ProxyPass for the /stream endpoint may not work correctly. The request fails with 400 Bad Request and the following error is logged inside gotify/server.

Error #01: websocket: the client is not using the websocket protocol: 'upgrade' token not found in 'Connection' header

To fix this issue, add the following rewrite rule to your virtual host config:

RewriteEngine  on
RewriteCond %{HTTP:Connection} upgrade [NC]
RewriteCond %{HTTP:Upgrade} websocket [NC]
RewriteRule /gotify/stream(.*) ws://127.0.0.1:GOTIFY_PORT/stream$1 [P,L]