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README
Apache-2.0

netty-websocket-spring-boot-starter License

English Docs

简介

本项目帮助你在spring-boot中使用Netty来开发WebSocket服务器,并像spring-websocket的注解开发一样简单

要求

  • jdk版本为1.8或1.8+

快速开始

  • 添加依赖:
	<dependency>
		<groupId>org.yeauty</groupId>
		<artifactId>netty-websocket-spring-boot-starter</artifactId>
		<version>0.9.5</version>
	</dependency>
  • 在端点类上加上@ServerEndpoint注解,并在相应的方法上加上@BeforeHandshake@OnOpen@OnClose@OnError@OnMessage@OnBinary@OnEvent注解,样例如下:
@ServerEndpoint(path = "/ws/{arg}")
public class MyWebSocket {

    @BeforeHandshake
    public void handshake(Session session, HttpHeaders headers, @RequestParam String req, @RequestParam MultiValueMap reqMap, @PathVariable String arg, @PathVariable Map pathMap){
        session.setSubprotocols("stomp");
        if (!req.equals("ok")){
            System.out.println("Authentication failed!");
            session.close();
        }
    }
    
    @OnOpen
    public void onOpen(Session session, HttpHeaders headers, @RequestParam String req, @RequestParam MultiValueMap reqMap, @PathVariable String arg, @PathVariable Map pathMap){
        System.out.println("new connection");
        System.out.println(req);
    }

    @OnClose
    public void onClose(Session session) throws IOException {
       System.out.println("one connection closed"); 
    }

    @OnError
    public void onError(Session session, Throwable throwable) {
        throwable.printStackTrace();
    }

    @OnMessage
    public void onMessage(Session session, String message) {
        System.out.println(message);
        session.sendText("Hello Netty!");
    }

    @OnBinary
    public void onBinary(Session session, byte[] bytes) {
        for (byte b : bytes) {
            System.out.println(b);
        }
        session.sendBinary(bytes); 
    }

    @OnEvent
    public void onEvent(Session session, Object evt) {
        if (evt instanceof IdleStateEvent) {
            IdleStateEvent idleStateEvent = (IdleStateEvent) evt;
            switch (idleStateEvent.state()) {
                case READER_IDLE:
                    System.out.println("read idle");
                    break;
                case WRITER_IDLE:
                    System.out.println("write idle");
                    break;
                case ALL_IDLE:
                    System.out.println("all idle");
                    break;
                default:
                    break;
            }
        }
    }

}
  • 打开WebSocket客户端,连接到ws://127.0.0.1:80/ws/xxx

注解

@ServerEndpoint

当ServerEndpointExporter类通过Spring配置进行声明并被使用,它将会去扫描带有@ServerEndpoint注解的类 被注解的类将被注册成为一个WebSocket端点 所有的配置项都在这个注解的属性中 ( 如:@ServerEndpoint("/ws") )

@BeforeHandshake

当有新的连接进入时,对该方法进行回调 注入参数的类型:Session、HttpHeaders...

@OnOpen

当有新的WebSocket连接完成时,对该方法进行回调 注入参数的类型:Session、HttpHeaders...

@OnClose

当有WebSocket连接关闭时,对该方法进行回调 注入参数的类型:Session

@OnError

当有WebSocket抛出异常时,对该方法进行回调 注入参数的类型:Session、Throwable

@OnMessage

当接收到字符串消息时,对该方法进行回调 注入参数的类型:Session、String

@OnBinary

当接收到二进制消息时,对该方法进行回调 注入参数的类型:Session、byte[]

@OnEvent

当接收到Netty的事件时,对该方法进行回调 注入参数的类型:Session、Object

配置

所有的配置项都在这个注解的属性中

属性 默认值 说明
path "/" WebSocket的path,也可以用value来设置
host "0.0.0.0" WebSocket的host,"0.0.0.0"即是所有本地地址
port 80 WebSocket绑定端口号。如果为0,则使用随机端口(端口获取可见 多端点服务)
bossLoopGroupThreads 0 bossEventLoopGroup的线程数
workerLoopGroupThreads 0 workerEventLoopGroup的线程数
useCompressionHandler false 是否添加WebSocketServerCompressionHandler到pipeline
optionConnectTimeoutMillis 30000 与Netty的ChannelOption.CONNECT_TIMEOUT_MILLIS一致
optionSoBacklog 128 与Netty的ChannelOption.SO_BACKLOG一致
childOptionWriteSpinCount 16 与Netty的ChannelOption.WRITE_SPIN_COUNT一致
childOptionWriteBufferHighWaterMark 64*1024 与Netty的ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK一致,但实际上是使用ChannelOption.WRITE_BUFFER_WATER_MARK
childOptionWriteBufferLowWaterMark 32*1024 与Netty的ChannelOption.WRITE_BUFFER_LOW_WATER_MARK一致,但实际上是使用 ChannelOption.WRITE_BUFFER_WATER_MARK
childOptionSoRcvbuf -1(即未设置) 与Netty的ChannelOption.SO_RCVBUF一致
childOptionSoSndbuf -1(即未设置) 与Netty的ChannelOption.SO_SNDBUF一致
childOptionTcpNodelay true 与Netty的ChannelOption.TCP_NODELAY一致
childOptionSoKeepalive false 与Netty的ChannelOption.SO_KEEPALIVE一致
childOptionSoLinger -1 与Netty的ChannelOption.SO_LINGER一致
childOptionAllowHalfClosure false 与Netty的ChannelOption.ALLOW_HALF_CLOSURE一致
readerIdleTimeSeconds 0 IdleStateHandler中的readerIdleTimeSeconds一致,并且当它不为0时,将在pipeline中添加IdleStateHandler
writerIdleTimeSeconds 0 IdleStateHandler中的writerIdleTimeSeconds一致,并且当它不为0时,将在pipeline中添加IdleStateHandler
allIdleTimeSeconds 0 IdleStateHandler中的allIdleTimeSeconds一致,并且当它不为0时,将在pipeline中添加IdleStateHandler
maxFramePayloadLength 65536 最大允许帧载荷长度

通过application.properties进行配置

所有参数皆可使用${...}占位符获取application.properties中的配置。如下:

  • 首先在@ServerEndpoint注解的属性中使用${...}占位符
@ServerEndpoint(host = "${ws.host}",port = "${ws.port}")
public class MyWebSocket {
    ...
}
  • 接下来即可在application.properties中配置
ws.host=0.0.0.0
ws.port=80

自定义Favicon

配置favicon的方式与spring-boot中完全一致。只需将favicon.ico文件放到classpath的根目录下即可。如下:

src/
  +- main/
    +- java/
    |   + <source code>
    +- resources/
        +- favicon.ico

自定义错误页面

配置自定义错误页面的方式与spring-boot中完全一致。你可以添加一个 /public/error 目录,错误页面将会是该目录下的静态页面,错误页面的文件名必须是准确的错误状态或者是一串掩码,如下:

src/
  +- main/
    +- java/
    |   + <source code>
    +- resources/
        +- public/
            +- error/
            |   +- 404.html
            |   +- 5xx.html
            +- <other public assets>

多端点服务

  • 快速启动的基础上,在多个需要成为端点的类上使用@ServerEndpoint@Component注解即可
  • 可通过ServerEndpointExporter.getInetSocketAddressSet()获取所有端点的地址
  • 当地址不同时(即host不同或port不同),使用不同的ServerBootstrap实例
  • 当地址相同,路径(path)不同时,使用同一个ServerBootstrap实例
  • 当多个端点服务的port为0时,将使用同一个随机的端口号
  • 当多个端点的port和path相同时,host不能设为"0.0.0.0",因为"0.0.0.0"意味着绑定所有的host

更新日志

0.8.0

  • 自动装配

0.9.0

  • 通过@PathVariable支持RESTful风格中获取参数
  • 通过@RequestParam实现请求中query的获取参数
  • 移除原来的ParameterMap,用@RequestParam MultiValueMap代替
  • 新增 @BeforeHandshake 注解,可在握手之前对连接进行关闭
  • @BeforeHandshake事件中可设置子协议
  • 去掉配置端点类上的 @Component
  • 更新Netty版本到 4.1.44.Final

0.9.1

  • 修复bug:当使用@RequestParam MultiValueMap时获取的对象为null
  • 更新Netty版本到 4.1.45.Final

0.9.2

  • 兼容 0.8.0 以下版本,可以手动装配ServerEndpointExporter对象

0.9.3

  • 修复bug:当没有 @BeforeHandshake时会出现空指针异常

0.9.4

  • 修复bug:当没有 @BeforeHandshakeOnOpen中的Session为null.

0.9.5

  • 修复bug:OnError事件中的Throwable为null.
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简介

轻量级、高性能的WebSocket框架 展开 收起
Java
Apache-2.0
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