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When hosted app requests assets from absolute URI like: /app.png, all requests are directed to root / location.
Analysis of sent headers shows that there is only one header preserving original subfolder: Referer:.
NginX: Serve application under sub path
location /mqttx {
return 302 /mqttx/;
}
location /mqttx/ {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://mqttx-web/;
}
# mqttx-web loads assets:
# - /app.js
# - /app.png
# - /favicon.ico
# from absolute paths!
# so it is impossible to host it under /mqttx/ without this trick:
if ($http_referer ~ ^https://mqtt.grinndev.ovh/mqttx/) {
rewrite ^ /mqttx$uri;
}