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mastodon-streaming-listener

This is a server to provide relay the notification from Mastodon's Streaming API to registered callback URL.

Different things from Tusky-api.

• Separate streaming listener server and application server.
• Streaming listener server does not have application specific information. There is a possibility that it can correspond to multiple applications.
• Possible to replace the Streaming API URL to inside the LAN
• (It focus to make Streaming listener server by instance-owner)
• Since the application server does not handle WebSocket, it becomes easy to scale.
• Both the streaming listener server and the application server can be configured behaviors for each instance.
• Support only for a specific instance

API

POST /register

(parameters)

• instance_url : URL of Mastodon instance you want to listen. ex) https://mastodon.juggler.jp . max length is 255 byte.
• tag : any String that can be used for management in your app. this is also used for a part of unique key of registrations. max length is 255 byte.
• app_id: ID of the your app. max length is 255 byte.
• app_secret : Secret of the your app.
• access_token : The access token you get from Mastodon's oAuth API.
• callback_url : The URL that will be called when new notification is arrived.
• endpoint : (optional)Type of streaming endpoint. One of 'user', 'user:notification'. If this parameter is not specified, default value is ( mastodon instance version >= v1.4.2 ? 'user:notification' : 'user' ).

(notice) Your app needs to call /register repeatly within 3 days to keep listening.

POST /unregister

(parameters)

• instance_url : same of specified in /register.
• tag : same of specified in /register.
• app_id : same of specified in /register.
• app_secret : secret of the your app.

(notice) The unique key of listener registration is : instanceUrl + appId + tag. If you want to certainly unregister registration, You have to make same these parameters.

Callback

Callback is called with POST method. Request body is Content-Type 'application/json' and it has following data.

• instanceUrl : same of specified in /register.
• tag : same of specified in /register.
• appId : same of specified in /register.
• payload : see document of Mastodon's Streaming API.

installation (using docker-compose)

prepare database

Please make a database for this app. and memo the parameters that required to connect from app to database.

# type of db. One of mysql, postgres, mssql. (Don't use sqlite)
DB_DIALECT=postgres

# host name or IP addres of database server
DB_HOST=172.17.0.1

# port number of database server
DB_PORT=4003

# name of database
DB_NAME=streaming_listener

# login information
DB_USER=streaming_listener
DB_PASS=***

edit configuration files

after git clone , you have to change some file.

# copy sample configuration files
cp config/app_map.hjson.sample config/app_map.hjson
cp config/instance_map.hjson.sample config/instance_map.hjson

(edit these .hjson files to configure for client app and instances)

cp .env.production.sample .env.production

(edit this .env file to configure database connection.)

build and start

docker-compose build

docker-compose up

configure nginx

This app listens on port 4002 at default. You can configure exposed port in docker-compose.yml. You should use Web frontend (nginx) to wrap with HTTPS.

Tweak

create index

create unique index stream_listener_registrations_iat on stream_listener_registrations ( "instanceUrl","appId","tag" );