Introduce processor

src/server/api/stream/channel.ts

@@ -0,0 +1,12 @@
+import * as websocket from 'websocket';
+import * as redis from 'redis';
+
+export default function(request: websocket.request, connection: websocket.connection, subscriber: redis.RedisClient): void {
+	const channel = request.resourceURL.query.channel;
+
+	// Subscribe channel stream
+	subscriber.subscribe(`misskey:channel-stream:${channel}`);
+	subscriber.on('message', (_, data) => {
+		connection.send(data);
+	});
+}