Nginx + Puma + Sidekiq web interface not showing css styles - ruby-on-rails

Question

I have an angularJS web app running in a Nginx server that sends request to a Rails API running in a Puma server. I have integrated Sidekiq 5.2.8 and everything works great but the Sidekiq web interface.
In my Nginx config file, I have a rule to pass request to the API. Please find the whole nginx.conf document:
events {
worker_connections 1024;
}
http {
upstream api.development {
# Path to Puma SOCK file, as defined previously
server unix:/tmp/puma.sock fail_timeout=0;
}
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
# set client body size to 10M #
client_max_body_size 10M;
gzip on;
server {
listen 80 default_server;
listen [::]:80 default_server ipv6only=on;
#charset koi8-r;
#access_log logs/host.access.log main;
root /Users/Rober/Projects/domain/dev/domain/app;
index index.html index.htm;
try_files $uri $uri/ /index.html =404;
# Proxy requests to the backoffice Rails API
location /api {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
#proxy_set_header X-Forwarded-Proto https;
proxy_redirect off;
rewrite ^/api(.*) /$1 break;
proxy_pass http://api.development;
}
# Rule to proxy the sidekiq web UI
location /sidekiq {
proxy_pass http://api.development;
}
# Expire rules for static content
# RCM: WPO
# Images
location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|svgz|mp4|ogg|ogv|webm|htc)$ {
root /Users/Rober/Projects/domain/dev/domain/app;
expires 1w;
add_header Cache-Control "public";
}
# This rule is the root cause of the problems with the sidekiq css
# I have commented it for testing purposes
# CSS and Javascript
#location ~* \.(?:css|js)$ {
# root /Users/Rober/Projects/domain/dev/domain/app;
# expires 1w;
# add_header Cache-Control "public";
#}
# I have replaced the previous location above for this as suggested by #Beena Shetty.
location ~* \.(?:css|js)$ {
add_header X-debug-message "Into the location css" always;
if ($uri !~* "^/sidekiq/\w*(.*)+$") {
add_header X-debug-message "Into the location css if" always;
root /Users/Rober/Projects/domain/dev/domain/app;
expires 1w;
add_header Cache-Control "public";
}
}
# cache.appcache, your document html and data
location ~* \.(?:manifest|appcache|html?|xml|json)$ {
root /Users/Rober/Projects/domain/dev/domain/app;
expires -1;
}
}
include servers/*;
}
In Rails:
routes:
require 'sidekiq/web'
mount Sidekiq::Web => '/sidekiq'
I have included next rule in Nginx config file and now when I request http://localhost/sidekiq I can see the web interface and navigate, but still cannot see the styles.
location /sidekiq {
proxy_pass http://api.development;
}
See screenshot.
The dev tools shows that when I load sideqik is trying to get bootstrap.css and some other css and javascript in http://localhost/sidekiq/stylesheets/bootstrap.css
What am I missing?
UPDATE:
I have found out the root cause of the problem in my nginx.conf. I have next rule that set a cache expiration time for performance purposes. If I comment this code, everything works. But how can I have both things living together?
CSS and Javascript
location ~* \.(?:css|js)$ {
root /Users/Rober/Projects/domain/dev/domain/app;
expires 1w;
add_header Cache-Control "public";
}
UPDATE 2: Just in case the problem comes from another point, I have included my whole nginx conf.
Now, with the provided config, the expiration rules in my web app are still working, but the css in the sidekiq webapp do not.
I have included two headers as debug. One when the server is accessing the location rule and the second when the server is accessing inside the if condition. When I request my home page with localhost and I check the request for my own css, such as app.css, I can see the header X-debug-message: Into the location css if, which is right.
If I request sidekiq with localhost/sidekiq I still get 404 error for css, let´s say http://localhost/sidekiq/stylesheets/bootstrap.css and I can see the header X-debug-message: Into the location css.
Current conclusions:
As soon as I include the location ~* .(?:css|js)$ rule, sidekiq css stops working. Even if the rule is empty, like:
location ~* \.(?:css|js)$ {
}
As soon as I delete or comment the whole rule, the sidekiq css works perfectly, but unfortunately this is not compatible with the expires rules that we need to include for performance purposes.

Answer 1

Try this:
location ~* \.(?:css|js)$ {
if ($uri !~* "^/sidekiq/\w*(.*)+$"){
root /Users/Rober/Projects/domain/dev/yanpy/app;
expires 1w;
add_header Cache-Control "public";
}
}

Answer 2

I wasn't able to find a fix for this, so I hacked it with the following method: I copied sidekiq's assets to the public folder and it started working ( since they're referenced by the UI ).
|- images
|-- favicon.io
|-- logo.png
|-- status.png
|- javascripts
|-- application.js
|-- dashboard.js
|- stylesheets
|-- application.css
|-- application-rtl.css
|-- application-dark.css
|-- application-rtl.min.css
|-- bootstrap.css
Mainly, these files: https://github.com/mperham/sidekiq/tree/master/web/assets