feat: complate socket.io base framework

Signed-off-by: MiaoWoo <admin@yumc.pw>

packages/websocket/src/server/websocket_handler.ts

@@ -0,0 +1,42 @@
+import { EventEmitter } from 'events'
+
+import { Keys } from './constants'
+import { WebSocketHandlerAdapter } from "../netty"
+import { HttpRequestHandler } from './httprequest'
+import { TextWebSocketFrameHandler } from './text_websocket_frame'
+
+const CharsetUtil = Java.type('io.netty.util.CharsetUtil')
+
+const HttpServerCodec = Java.type('io.netty.handler.codec.http.HttpServerCodec')
+const ChunkedWriteHandler = Java.type('io.netty.handler.stream.ChunkedWriteHandler')
+const HttpObjectAggregator = Java.type('io.netty.handler.codec.http.HttpObjectAggregator')
+const WebSocketServerProtocolHandler = Java.type('io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler')
+
+export class WebSocketHandler extends WebSocketHandlerAdapter {
+    private event: EventEmitter;
+    constructor(event: EventEmitter) {
+        super()
+        this.event = event;
+    }
+    channelRead(ctx: any, msg: any) {
+        msg.markReaderIndex()
+        let message: string = msg.toString(CharsetUtil.UTF_8)
+        let channel = ctx.channel()
+        let pipeline = channel.pipeline()
+        if (message.indexOf('HTTP/1.1') > 0) {
+            pipeline.names().forEach(f => {
+                if (f == Keys.Handler || f.indexOf(Keys.Default) > -1) { return }
+                pipeline.remove(f)
+            })
+            pipeline.addLast('http', new HttpServerCodec())
+            pipeline.addLast('chunk', new ChunkedWriteHandler())
+            pipeline.addLast('httpobj', new HttpObjectAggregator(64 * 1024))
+            pipeline.addLast('http_request', new HttpRequestHandler().getHandler())
+            pipeline.addLast('websocket', new WebSocketServerProtocolHandler("/ws", true))
+            pipeline.addLast('websocket_handler', new TextWebSocketFrameHandler(this.event).getHandler())
+        }
+        pipeline.remove(Keys.Handler)
+        msg.resetReaderIndex()
+        ctx.fireChannelRead(msg)
+    }
+}