grizzly1.9.46 chat

最新推荐文章于 2021-02-17 01:35:20 发布

原创最新推荐文章于 2021-02-17 01:35:20 发布 · 1.2k 阅读

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#websocket #import #string #function #socket #login

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http://antwerkz.com/glassfish-web-sockets-sample/

1 /*
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4   * Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
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8   * and Distribution License("CDDL") (collectively, the "License"). You
9   * may not use this file except in compliance with the License. You can
10 * obtain a copy of the License at
11 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
12 * or packager/legal/LICENSE.txt. See the License for the specific
13 * language governing permissions and limitations under the License.
14 *
15 * When distributing the software, include this License Header Notice in each
16 * file and include the License file at packager/legal/LICENSE.txt.
17 *
18 * GPL Classpath Exception:
19 * Oracle designates this particular file as subject to the "Classpath"
20 * exception as provided by Oracle in the GPL Version 2 section of the License
21 * file that accompanied this code.
22 *
23 * Modifications:
24 * If applicable, add the following below the License Header, with the fields
25 * enclosed by brackets [] replaced by your own identifying information:
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29 * If you wish your version of this file to be governed by only the CDDL or
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31 * elects to include this software in this distribution under the [CDDL or GPL
32 * Version 2] license." If you don't indicate a single choice of license, a
33 * recipient has the option to distribute your version of this file under
34 * either the CDDL, the GPL Version 2 or to extend the choice of license to
35 * its licensees as provided above. However, if you add GPL Version 2 code
36 * and therefore, elected the GPL Version 2 license, then the option applies
37 * only if the new code is made subject to such option by the copyright
38 * holder.
39 */
40
41 package com.sun.grizzly.samples.websockets;
42
43 import com.sun.grizzly.tcp.Request;
44 import com.sun.grizzly.websockets.ProtocolHandler;
45 import com.sun.grizzly.websockets.WebSocket;
46 import com.sun.grizzly.websockets.WebSocketApplication;
47 import com.sun.grizzly.websockets.WebSocketException;
48 import com.sun.grizzly.websockets.WebSocketListener;
49
50 public class ChatApplication extends WebSocketApplication {
51     @Override
52     public WebSocket createWebSocket(ProtocolHandler protocolHandler, WebSocketListener... listeners) {
53         return new ChatWebSocket(protocolHandler, listeners);
54     }
55
56     @Override
57     public boolean isApplicationRequest(Request request) {   //判断是否websocket应用
58         final String uri = request.requestURI().toString();
59         return uri.endsWith("/chat");
60     }
61
62     @Override
63     public void onMessage(WebSocket socket, String text) {   //收到从客户端来的消息，WebSocket socket, String text已经实例化
64         if (text.startsWith("login:")) {
65             login((ChatWebSocket) socket, text);
66         } else {
67             broadcast(((ChatWebSocket) socket).getUser() + " : " + text);   //消息处理消耗方式
68         }
69     }
70
71     private void broadcast(String text) {     / //将消息广播
72         WebSocketsServlet.logger.info("Broadcasting : " + text);
73         for (WebSocket webSocket : getWebSockets()) { //   WebSocketApplication类下面的方法：protected Set<WebSocket>getWebSockets()   Returns a set of WebSockets, registered with the application. The returned set is unmodifiable, the possible modifications may cause exceptions.
74             if (!webSocket.isConnected()) {
75                continue;
76             }
77             try {
78                 send((ChatWebSocket) webSocket, text);

79             } catch (WebSocketException e) {
80                 e.printStackTrace();
81                 WebSocketsServlet.logger.info("Removing chat client: " + e.getMessage());
82                 webSocket.close();
83             }
84         }
85     }
86
87     private void login(ChatWebSocket socket, String frame) {
88         if (socket.getUser() == null) {
89             WebSocketsServlet.logger.info("ChatApplication.login");
90             socket.setUser(frame.split(":")[1].trim());              //刚登陆，设置ChatWebSocket的用户名字，自己定义的类，并在所有socket广播
91             broadcast(socket.getUser() + " has joined the chat.");
92         }
93     }
94
95     public void send(ChatWebSocket webSocket, String data) {
96         webSocket.send(toJsonp(webSocket.getUser(), data));//send(String data)        Write the data to the socket.    //将消息发给客户端，每个websocket都发送一份。

97     }
98
99     private String toJsonp(String name, String message) {
100        return "window.parent.app.update({ name: \"" + escape(name) + "\", message: \"" + escape(message) + "\" });\n";
101    }
102
103    private String escape(String orig) {
104        StringBuilder buffer = new StringBuilder(orig.length());
105
106        for (int i = 0; i < orig.length(); i++) {
107            char c = orig.charAt(i);
108            switch (c) {
109                case '\b':
110                    buffer.append("\\b");
111                    break;
112                case '\f':
113                    buffer.append("\\f");
114                    break;
115                case '\n':
116                    buffer.append("<br />");
117                    break;
118                case '\r':
119                    // ignore
120                    break;
121                case '\t':
122                    buffer.append("\\t");
123                    break;
124                case '\'':
125                    buffer.append("\\'");
126                    break;
127                case '\"':
128                    buffer.append("\\\"");
129                    break;
130                case '\\':
131                    buffer.append("\\\\");
132                    break;
133                case '<':
134                    buffer.append("<");
135                    break;
136                case '>':
137                    buffer.append(">");
138                    break;
139                case '&':
140                    buffer.append("&");
141                    break;
142                default:
143                    buffer.append(c);
144            }
145        }
146
147        return buffer.toString();
148    }
149}

41package com.sun.grizzly.samples.websockets;
42
43import com.sun.grizzly.websockets.DefaultWebSocket;
44import com.sun.grizzly.websockets.ProtocolHandler;
45import com.sun.grizzly.websockets.WebSocketListener;
46
47public class ChatWebSocket extends DefaultWebSocket {
48    private String user;
49
50    public ChatWebSocket(ProtocolHandler handler, WebSocketListener[] listeners) {
51        super(handler, listeners);
52    }
53
54    public String getUser() {
55        return user;
56    }
57
58    public void setUser(String user) {
59        this.user = user;
60    }
61}

41package com.sun.grizzly.samples.websockets;
42
43import com.sun.grizzly.websockets.WebSocketEngine;
44
45import javax.servlet.ServletConfig;
46import javax.servlet.ServletException;
47import javax.servlet.http.HttpServlet;
48import java.util.logging.Logger;
49
50public class WebSocketsServlet extends HttpServlet {
51    static final Logger logger = Logger.getLogger(WebSocketEngine.WEBSOCKET);
52    private final ChatApplication app = new ChatApplication();
53
54    @Override
55    public void init(ServletConfig config) throws ServletException {
56        WebSocketEngine.getEngine().register(app);

///生命周期函数 init(ServletConfig config) Called by the servlet container to indicate to a servlet that the servlet is being placed into service.

java.lang.Object extended by javax.servlet.GenericServlet 里面init（）

ava.lang.Object extended by javax.servlet.GenericServletjavax.servlet.http.HttpServlet/////

void init() A convenience method which can be overridden so that there's no need to call super.init(config).

void init(ServletConfig config) Called by the servlet container to indicate to a servlet that the servlet is being placed into service.

Called by the servlet container to indicate to a servlet that the servlet is being placed into service. See Servlet#init.

This implementation stores the ServletConfig object it receives from the servlet container for later use. When overriding this form of the method, call super.init(config).

Specified by:

init in interface Servlet

Parameters:

config - the ServletConfig object that contains configutation information for this servlet

Throws:

ServletException - if an exception occurs that interrupts the servlet's normal operation

See Also:

UnavailableException

http://docs.oracle.com/javaee/6/api/

57    }
58
59    @Override
60    public void destroy() {
61        WebSocketEngine.getEngine().unregister(app);
62    }
63}

客户端代码：

That does it for the server side. On the client side we have the usual mix of HTML and javascript. I don't want to go in to

depth on most of that but I do want to take a look at one particular piece. In application.js, we have this code:

        $('login-button').disabled = true;
        $('login-form').style.display = 'none';
        $('message-form').style.display = '';

        websocket = new WebSocket(app.url);                        //见上面自己定义的url
        websocket.onopen = function() {
            // Web Socket is connected. You can send data by send() method
            websocket.send('login:' + name);                       //发给服务器侧
        };
        websocket.onmessage = function (evt) {           //当接受到服务器侧的消息时触发此事件
            eval(evt.data);                                                   ///见备注，将数据由json格式转换为js对象格式
            $('message').disabled = false;
            $('post-button').disabled = false;
            $('message').focus();
            $('message').value = '';
        };
        websocket.onclose = function() {      ///关闭时触发此事件
            var p = document.createElement('p');
            p.innerHTML = name + ': has left the chat';

$('display').appendChild(p);

            new Fx.Scroll('display').down();
        };
    },

    post: function() {       //发送消息的函数代码
        var message = $F('message');
        if (!message > 0) {
            return;
        }
        $('message').disabled = true;
        $('post-button').disabled = true;

        websocket.send(message);       //发送消息
    },
    update: function(data) {      //更新显示
        if (data) {
            var p = document.createElement('p');
            p.innerHTML = data.name + ': ' + data.message;

$('display').appendChild(p);

            new Fx.Scroll('display').down();
        }
    }
};

备注；

2011-12-27 18:20