Traefik reverse proxy fails when using base URL

[MrLemur]

Read the FAQ first!

Describe the bug

Traefik reverse proxy fails if url_base set. Works fine on a subdomain, but will show 404 when on a base URL. The page constantly tries to access css/* etc in a loop when loaded.

To Reproduce

What to do to reproduce the problem.

Logs

jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/remixicon.css) => 404 in 15.106287ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/bundle.css) => 404 in 4.464636ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/remixicon.css) => 404 in 4.170007ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/bundle.css) => 404 in 4.261646ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/remixicon.css) => 404 in 3.39886ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/bundle.css) => 404 in 4.219146ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/remixicon.css) => 404 in 3.291027ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/bundle.css) => 404 in 3.163965ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/remixicon.css) => 404 in 3.461112ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/bundle.css) => 404 in 3.266258ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/remixicon.css) => 404 in 3.411234ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/bundle.css) => 404 in 3.760947ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/remixicon.css) => 404 in 3.579617ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/bundle.css) => 404 in 3.373669ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/remixicon.css) => 404 in 3.285983ms; 
jfa-go_1         | [GIN/DEBUG] 17:44:33: GET(/jfa/css/bundle.css) => 404 in 3.738771ms; 

Configuration

url_base set to /jfa

docker config:

jfa-go:
    image: hrfee/jfa-go:unstable
    restart: always
    user: 1000:1000
    volumes:
      - /opt/docker/jfa-go:/data
      - /opt/docker/jellyfin:/jf
      - /etc/localtime:/etc/localtime:ro
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.jfa-go.rule=Host(`services.${DOMAIN}`) && PathPrefix(`/jfa`)"
      - "traefik.http.routers.jfa-go.tls=true"

Platform/Version

Docker, latest git as of 11/02/2021 17:30 GMT

[hrfee]

The URL has to be rewritten to remove /jfa, with nginx i use
rewrite ^/jfa/(.*) /$1 break;.
Apparently PathPrefixStrip: /jfa would be equivalent in traefik, although i don't know where you would put this.

[MrLemur]

Okay that makes sense. I assume the server in go won't change the directory to serve requests from based on the url_base value?

[hrfee]

No, it doesn't but that probably would have been a better design choice.

[MrLemur]

I now have it working correctly with Traefik if anyone else runs into the issue:

  jfa-go:
    image: hrfee/jfa-go:unstable
    restart: always
    user: 1000:1000
    volumes:
      - /opt/docker/jfa-go:/data
      - /opt/docker/jellyfin:/jf
      - /etc/localtime:/etc/localtime:ro
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.jfa-go.rule=Host(`services.${DOMAIN}`) && PathPrefix(`/jfa`)"
      - "traefik.http.middlewares.jfa-go-strip.stripprefix.prefixes=/jfa"
      - "traefik.http.routers.jfa-go.tls=true"
      - "traefik.http.routers.jfa-go.middlewares=jfa-go-strip@docker"

[hrfee]

I'll stick that on the reverse proxy tab in the wiki, thanks.