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Drawpile Session Listing Server

This server provides a simple RESTful API for publicly listing Drawpile sessions.

It does two things:

  1. Receive and list session announcements (the "List at" option in Drawpile's Host dialog)
  2. Proxy the live session list from a Drawpile server

The listings served by listserver are shown in Drawpile's Join dialog and can also be shown on a website.

Installation

  1. Install the listserver: GO111MODULE=ON go get github.com/drawpile/listserver@latest
  2. Write a configuration file, you can copy example.cfg and edit it
  3. Run the listing server: ~/go/bin/listserver -c myconfig.cfg

Alternatively, configuration can be passed as environment variables:

LS_LISTEN=localhost:8081 ./listserver

Sample systemd unit file (/etc/systemd/system/drawpile-listserver.service):

[Unit]
Description=Drawpile session listing server
After=network.target

[Service]
ExecStart=/home/website/go/bin/listserver -c /home/website/listserver.cfg
User=website

[Install]
WantedBy=multi-user.target

Configuration

See example.cfg for a sample configuration with all the possible settings. Typically, you only need to set those you need.

The list server supports three different kinds of listings:

  1. Public announcements
  2. Private listings (accesssible via room code only)
  3. Live server sessions

If the includeServers config key is set, listserver will use drawpile-srv's web admin API to fetch that server's session list and include it in the results.

If database is set to none, listserver will be in read-only mode: sessions cannot be listed manually, but ones fetched directly from a server will be shown. (Note that you should always enable at least one of these options, as otherwise listserver does nothing.)

At a minimum you should set the following configuration settings:

  • listen (the server's local address)
  • database and/or includeservers (what to list)
  • name the short name of the list server shown to the user
  • description a short description of this server shown to the user
  • proxyHeaders=true since you will most likely be using nginx or apache in front of this server

Tip: on the same domain as your drawpile-srv, add this meta tag to your /index.html:

<meta name="drawpile:list-server" content="https://your-list-server-url-here/">

When you click "Add" in Drawpile's join dialog when your server is selected, Drawpile will fetch the root index page and automatically find and add the list server.

Banning hosts

Hosts can be banned from announcements by adding the hostname to the hostbans table. Optionally, an expiration time can be given. If NULL, the ban does not expire. The notes column can be used for freeform notes about the ban.

Using with nginx

In your nginx virtual host config, add a proxy pass location like this:

location /listing/ {
	proxy_pass http://127.0.0.1:8080/;
	proxy_redirect default;
	proxy_set_header X-Real-IP $remote_addr;
}

And set these settings in your listserver config file:

listen = "127.0.0.1:8080"
proxyHeaders = true

The proxyheaders setting is critical: the remote address of the connection will be the address of the nginx server, so the original client address must be passed in the HTTP header.