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Websocket API using Redis as message broker backend

Project description

Provides an extensible Redis-over-WebSocket API on top of websocket and aioredis


For basic functionality:

pip install redis_websocket_api

With geo extension (filtering messages by extent, projection transformation):

pip install redis_websocket_api[geo]

Clint-Server Interface

By default the `WebsocketServer` provides

Server-Side Usage

Start the `WebsocketServer` like this:

from aioredis import create_redis_pool
from redis_websocket_api import WebsocketServer

REDIS_ADDRESS = ('localhost', 6379)

channel_names=('public_channel_1', 'public_channel_2'),

Have a look at `examples/` for an example with the `GeoCommandsMixin`

Clint-Side Usage

#### `WebsocketHandler`

The default functionality provides the following interface to the web client
(expecting the requests over a websocket connection):
- `GET key` translates to `hvals key`
- `GET key hkey` translates to `hget key hkey`
- `SUB key` subscribes the websocket to a redis channel (using a single redis
connection pool for all clients)
- `DEL key` unsubscribes the client from the channel
- `PING` causes a `PONG` response (to avoid timeouts)

#### Subclass of `WebsocketHandler` with `GeoCommandsMixin` added

By adding the `GeoCommandsMixin` the web client can use
- `BBOX left bottom right top` to only receive GeoJSON features within this box
plus all messages which are not valid GeoJSON
- `PROJECTION epsg:number` causes all future GeoJSON features to be transformed
to the given projection

See `examples/` for how to use an extended `WebsocketHandler` subclass.

Geo commands are currently limited to `LineString`, `Polygon`, and `Point`

#### Build your own protocol

Using the commands listed above for communicating from client to server is
completly optional and determinded by the Mixin classes added to the

Project details

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