NGINX reverse proxy and swagger-ui.html

Question

I have been trying to get swagger to work behind a NGINX reverse proxy, but I just cannot get it right. My services are running in docker containers and I would like to access them with these sample urls:

My service:

http://service-host.example.com/my-service1

Swagger:

http://service-host.example.com/my-service1/api

My nested location blocks look like this:

location /my-service1 {
  resolver 127.0.0.11 valid=30s;
  set $upstream my-host.example.com;
  proxy_pass http://$upstream/home;

      location ~ /api {
            resolver 127.0.0.11 valid=30s;
            set $upstream my-host.example.com;
            proxy_pass http://$upstream/swagger-ui.html;
      }
      location ~ /webjars {
            resolver 127.0.0.11 valid=30s;
            set $upstream my-host.example.com;
            proxy_pass http://$upstream/;
      }
      location ~ /v2 {
            resolver 127.0.0.11 valid=30s;
            set $upstream my-host.example.com;
            proxy_pass http://$upstream/;
      }
      location ~ /swagger-resources {
            resolver 127.0.0.11 valid=30s;
            set $upstream my-host.example.com;
            proxy_pass http://$upstream/;
      }
}

My NGINX log looks something like this:

GET /my-service1/api/ HTTP/2.0" 200
GET /my-service1/api/webjars/springfox-swagger-ui/springfox.css?v=2.9.2 HTTP/2.0" 200
GET /my-service1/api/webjars/springfox-swagger-ui/swagger-ui-bundle.js?v=2.9.2 HTTP/2.0" 200
GET /my-service1/api/webjars/springfox-swagger-ui/swagger-ui.css?v=2.9.2 HTTP/2.0" 200
GET /my-service1/api/webjars/springfox-swagger-ui/springfox.js?v=2.9.2 HTTP/2.0" 200
GET /my-service1/api/webjars/springfox-swagger-ui/swagger-ui-standalone-preset.js?v=2.9.2 HTTP/2.0" 200

Testing this directly, without going via NGINX, the process proceeds further, with GETs to /v2/api and /swagger-resources. Using the reverse proxy gets stuck just before that.

Any suggestions on how to resolve this?

EDIT: Here is a NGINX log when not trying to reverse proxy, but going directly to http://myservice.example.com/swagger-ui.html where it works perfectly!

myservice.example.com 192.168.1.30 - - [12/Feb/2019:09:59:44 +0000] "GET /swagger-ui.html HTTP/2.0" 200 3318 "-" "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0"
myservice.example.com 192.168.1.30 - - [12/Feb/2019:09:59:44 +0000] "GET /webjars/springfox-swagger-ui/springfox.css?v=2.9.2 HTTP/2.0" 200 2894 "https://myservice.example.com/swagger-ui.html" "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0"
myservice.example.com 192.168.1.30 - - [12/Feb/2019:09:59:44 +0000] "GET /webjars/springfox-swagger-ui/swagger-ui.css?v=2.9.2 HTTP/2.0" 200 154488 "https://myservice.example.com/swagger-ui.html" "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0"
myservice.example.com 192.168.1.30 - - [12/Feb/2019:09:59:45 +0000] "GET /webjars/springfox-swagger-ui/swagger-ui-bundle.js?v=2.9.2 HTTP/2.0" 200 1448844 "https://myservice.example.com/swagger-ui.html" "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0"
myservice.example.com 192.168.1.30 - - [12/Feb/2019:09:59:45 +0000] "GET /webjars/springfox-swagger-ui/springfox.js?v=2.9.2 HTTP/2.0" 200 96207 "https://myservice.example.com/swagger-ui.html" "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0"
myservice.example.com 192.168.1.30 - - [12/Feb/2019:09:59:45 +0000] "GET /webjars/springfox-swagger-ui/swagger-ui-standalone-preset.js?v=2.9.2 HTTP/2.0" 200 440850 "https://myservice.example.com/swagger-ui.html" "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0"
myservice.example.com 192.168.1.30 - - [12/Feb/2019:09:59:46 +0000] "GET /swagger-resources/configuration/ui HTTP/2.0" 200 450 "https://myservice.example.com/swagger-ui.html" "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0"
myservice.example.com 192.168.1.30 - - [12/Feb/2019:09:59:46 +0000] "GET /swagger-resources/configuration/security HTTP/2.0" 200 2 "https://myservice.example.com/swagger-ui.html" "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0"
myservice.example.com 192.168.1.30 - - [12/Feb/2019:09:59:46 +0000] "GET /swagger-resources HTTP/2.0" 200 90 "https://myservice.example.com/swagger-ui.html" "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0"
myservice.example.com 192.168.1.30 - - [12/Feb/2019:09:59:46 +0000] "GET /v2/api-docs HTTP/2.0" 200 8387 "https://myservice.example.com/swagger-ui.html" "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0"

Answer 1

swagger working in my server (NET CORE) with this conf

    location / {
        #root   /srv/ftp;
        #index  index.html index.htm;
        proxy_pass         http://localhost:5000;
        proxy_http_version 1.1;
        proxy_set_header   Upgrade $http_upgrade;
        proxy_set_header   Connection keep-alive;
        proxy_set_header   Host $host;
        proxy_cache_bypass $http_upgrade;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto $scheme;
    }