Question

编辑：删除对C＃的引用，因为唯一接受的答案是关于Java。如果有人需要有关C＃中websocket服务器实现的信息，请提出一个新问题。

您是否知道用Java创建WebSockets服务器的“生产就绪”框架？我找到了一个库http://nugget.codeplex.com/，但我不知道它是如何稳定和快速的。

Answer 1

接受的答案是3年，随着最近发布的JEE7，现在每个实现servert 3.1的Web容器都将通过标准API（javax.websocket）包支持websocket。

以下代码显示了如何使用JEE7实现websocket的示例：

import java.util.logging.Level;
import java.util.logging.Logger;
import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;

@ServerEndpoint(value = "/chat")
public class ChatServer {

    private static final Logger LOGGER = 
            Logger.getLogger(ChatServer.class.getName());

    @OnOpen
    public void onOpen(Session session) {
        LOGGER.log(Level.INFO, "New connection with client: {0}", 
                session.getId());
    }

    @OnMessage
    public String onMessage(String message, Session session) {
        LOGGER.log(Level.INFO, "New message from Client [{0}]: {1}", 
                new Object[] {session.getId(), message});
        return "Server received [" + message + "]";
    }

    @OnClose
    public void onClose(Session session) {
        LOGGER.log(Level.INFO, "Close connection for client: {0}", 
                session.getId());
    }

    @OnError
    public void onError(Throwable exception, Session session) {
        LOGGER.log(Level.INFO, "Error for client: {0}", session.getId());
    }
}

详细示例here。

支持Websocket的Web容器：

Tomcat 8
WildFly（以前是Jboss AS）
Glassfish 4.0
以及更多

Answer 2

对于Java，请查看此informative post。从那里复制粘贴：

Jetty WebSocket Server - 自去年9月以来，Jetty一直支持WebSockets。这似乎是个不错的选择。
的 Caucho Resin

的 jWebSocket

GlassFish / Grizzly （查看其上的DZone帖子here）

JBoss Netty （请参阅补丁here）

的 Webbit

在这些选项中，我认为 Jetty 和 Resin 是最成熟和稳定的。但是，总是很乐意进行自己的测试。

Answer 3

Vert.x选项也值得考虑。

创建ws服务器可以像

一样简单

vertx.websocketHandler(new Handler<ServerWebSocket>() {
    public void handle(ServerWebSocket ws) {
        // A WebSocket has connected!
    }
}).listen(8080);

或

vertx.createHttpServer().websocketHandler(new Handler<ServerWebSocket>() {
        @Override
        public void handle(final ServerWebSocket ws) {
            logger.info("ws connection established with " + ws.remoteAddress());
            ws.dataHandler(new Handler<Buffer>() {
                @Override
                public void handle(Buffer data) {
                    JsonObject item = new JsonObject(data.toString());
                    logger.info("data in -> " + item.encodePrettily());
                       // if you want to write something back in response to the client
                    //ws.writeTextFrame(...);
            }
            });
        }
    }).listen(port, new Handler<AsyncResult<HttpServer>>() {
        @Override
        public void handle(AsyncResult<HttpServer> event) {
            logger.info("ws server is up and listening on port " + port);
        }
    });

有关详细信息，请查看http://vertx.io/docs/vertx-core/java/#_websockets

因此，可以使用Vert.x编写自己的WebSocket服务器，将其打包为FatJar，并自行运行。

或者你可以嵌入Vert.x环境。在您的应用程序中，以编程方式部署您的Verticle（实现ws服务器）。

另一种选择是JBoss的Web服务器Undertow。这很容易嵌入到应用程序中。

添加这些依赖项：

<dependency>
  <groupId>io.undertow</groupId>
  <artifactId>undertow-servlet</artifactId>
  <version>${version.io.undertow}</version>
</dependency>

<dependency>
  <groupId>io.undertow</groupId>
  <artifactId>undertow-websockets-jsr</artifactId>
  <version>${version.io.undertow}</version>
</dependency>

这是ws服务器的示例：

Undertow server = Undertow.builder()
            .addHttpListener(8080, "localhost")
            .setHandler(path()
                    .addPrefixPath("/myapp", websocket(new WebSocketConnectionCallback() {

                        @Override
                        public void onConnect(WebSocketHttpExchange exchange, WebSocketChannel channel) {
                            channel.getReceiveSetter().set(new AbstractReceiveListener() {

                                @Override
                                protected void onFullTextMessage(WebSocketChannel channel, BufferedTextMessage message) {
                                    final String messageData = message.getData();
                                    for (WebSocketChannel session : channel.getPeerConnections()) {
                                        WebSockets.sendText(messageData, session, null);
                                    }
                                }
                            });
                            channel.resumeReceives();
                        }
                    }))
            .build();

    server.start();

Answer 4

看看Bristleback Framework。它是常用Java Websocket服务器的高级覆盖，如Jetty，Netty或Tomcat。如果你喜欢Spring Framework，你一定要试试Bristleback！

免责声明：我是Bristleback Framework项目的撰稿人。

Answer 5

Apache Tomcat 8.0实现了WebSockets 1.1 API（JSR-356）。您可以通过导航到示例文件夹安装后使用示例：还有回声聊天和蛇游戏。

Answer 6

JETTY

过去一周我一直在讨论如何制作WebSocket服务器。终于有了工作希望这会有所帮助。它使用Jetty（jars）中的库。

文件WebRTC_IceServer.java

package com.evanstools;
import org.eclipse.jetty.server.*;
import org.eclipse.jetty.websocket.server.*;
public class WebRTC_IceServer{
public static void main(String[] args){
try{
////////////////////////
if(args.length == 0){
  System.out.printf("%s%n","WebRTC_IceServer [port]");
  return;
}
Server server = new Server(Integer.parseInt(args[0]));
WebSocketHandler.Simple webSocketHandlerSimple = new WebSocketHandler.Simple(WebsocketPOJO.class);
server.setHandler(webSocketHandlerSimple);
server.start();
server.join();
////////////////////////
}catch(Exception w){w.printStackTrace();}
}
}

File WebsocketPOJO.java

package com.evanstools;
import org.eclipse.jetty.websocket.api.annotations.*;
import org.eclipse.jetty.websocket.api.Session;
//The class must be not abstract and public.
@WebSocket
public class WebsocketPOJO{
//Flags one method in the class as receiving the On Connect event.
//Method must be public, not abstract, return void, and have a single Session parameter.
@OnWebSocketConnect
public void onWebSocketConnect(Session session){
    System.out.printf("%s%n","test client connected");
}
//Flags one method in the class as receiving the On Close event.
//Method signature must be public, not abstract, and return void.
//The method parameters:
////Session (optional)
////int closeCode (required)
////String closeReason (required)
@OnWebSocketClose
public void OnWebSocketClose(Session session,int closeCode,String closeReason){}
//Flags up to 2 methods in the class as receiving On Message events.
//You can have 1 method for TEXT messages, and 1 method for BINARY messages.
//Method signature must be public, not abstract, and return void.
//The method parameters for Text messages:
////Session (optional)
////String text (required)
//The method parameters for Binary messages:
////Session (optional)
////byte buf[] (required)
////int offset (required)
////int length (required)
@OnWebSocketMessage
public void onWebSocketMessageString(Session session, String text){}
//Flags one method in the class as receiving Error events from the WebSocket implementation.
//Method signatures must be public, not abstract, and return void.
//The method parameters:
////Session (optional)
////Throwable cause (required)
//@OnWebSocketError
//Flags one method in the class as receiving Frame events from the WebSocket implementation after they have been processed by any extensions declared during the Upgrade handshake.
//Method signatures must be public, not abstract, and return void.
//The method parameters:
////Session (optional)
///Frame (required)
//The Frame received will be notified on this method, then be processed by Jetty, possibly resulting in another event, such as On Close, or On Message. Changes to the Frame will not be seen by Jetty.
//@OnWebSocketFrame
}

Java中的WebSockets生产就绪服务器？

6 个答案: