Reverse Proxy

This contains examples for how to use docspell behind a reverse proxy.

For the examples below, assume the following:

Docspell app is available at 192.168.1.11:7880. If it is running on the same machine as the reverse proxy server, you can set localhost:7880 instead.
The external domain/hostname is docspell.example.com

Configuring Docspell

These settings require a complement config part in the docspell configuration file:

First, if Docspell REST server is on a different machine, you need to change the bind.address setting to be either 0.0.0.0 or the ip address of the network interface that the reverse proxy server connects to.
```
docspell.server {
  # Where the server binds to.
  bind {
    address = "192.168.1.11"
    port = 7880
  }
}
```
Note that a value of 0.0.0.0 instead of 192.168.1.11 will bind the server to every network interface.
(Optional) Docspell needs to know the external url. The base-url setting should point to the external address. Using above values, it would be https://docspell.example.com.
```
docspell.server {
  # This is the base URL this application is deployed to. This is used
  # to create absolute URLs and to configure the cookie.
  base-url = "https://docspell.example.com"
 ...
}
```
You can also leave the default settings (localhost), in this case Docspell uses the request header to determine the external url.

Note that this example assumes that the docspell-joex component is on the same machine. This page is only related for exposing the REST server and web application.

If you have examples for more http servers (e.g. apache), please let me know or add it to this site.

Headers

If base-url is left to its default, then Docspell tries to find the external URL from the http request. When using a reverse proxy, you then need to pass some information from the original request so Docspell can construct the correct url. These headers are evaluated:

X-Forwarded-Host
X-Forwarded-Proto
X-Forwarded-Port
X-Forwarded-For

Example for nginx:

proxy_set_header X-Forwarded-Host   $host;
proxy_set_header X-Forwarded-Port   443;
proxy_set_header X-Forwarded-Proto  https;

Nginx

This defines two servers: one listens for http traffic and redirects to the https variant. Additionally it defines the let's encrypt .well-known folder name.

The https server endpoint is configured with the let's encrypt certificates and acts as a proxy for the application at 192.168.1.11:7880.

server {
    listen 0.0.0.0:80 ;
    listen [::]:80 ;
    server_name docspell.example.com ;
    location /.well-known/acme-challenge {
        root /var/data/nginx/ACME-PUBLIC;
        auth_basic off;
    }
    location / {
        return 301 https://$host$request_uri;
    }
}
server {
    listen 0.0.0.0:443 ssl http2 ;
    listen [::]:443 ssl http2 ;
    server_name docspell.example.com ;
    location /.well-known/acme-challenge {
        root /var/data/nginx/ACME-PUBLIC;
        auth_basic off;
    }
    ssl_certificate /var/lib/acme/docspell.example.com/fullchain.pem;
    ssl_certificate_key /var/lib/acme/docspell.example.com/key.pem;
    ssl_trusted_certificate /var/lib/acme/docspell.example.com/full.pem;
    location / {
        proxy_pass http://192.168.1.11:7880;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_set_header X-Forwarded-Host   $host;
        proxy_set_header X-Forwarded-Port   443;
        proxy_set_header X-Forwarded-Proto  https;

        //client_max_body_size 40M; //to allow larger uploads
    }
}

Caddy

docspell.example.com {
    reverse_proxy http://192.168.1.11:7880
}

Traefik 2

http:

  routers:
    docspell:
      rule: "Host(`docspell.example.com`)"
      service: docspell
      entryPoints:
      - web-secure # or whatever you named it for SSL

  services:
    docspell:
      loadBalancer:
        servers:
          - url: http://192.168.1.11:7880 # the ip of the container, localhost if you use docker port mapping
        healthCheck:
          path: /api/info/version

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