已建立大气套接字，但没有接收/发送数据

Posted 2023-02-16

【中文标题】已建立大气套接字，但没有接收/发送数据

【英文标题】：Atmosphere socket established but no data being received/sent

【发布时间】：2012-10-30 19:26:54

【问题描述】：

我正在关注 Atmosphere tutorial 以获得基本的聊天应用程序设置。目前在运行 javascript 时，它似乎能够使用 Web 套接字建立与服务器的连接。我在 Chrome 控制台中得到以下信息：

Invoking executeWebSocket core.js:2298
Using URL: ws://localhost:8080/web-transport/chat?X-Atmosphere-tracking-id=0&X-Atmosphere-Framework=1.1&X-Atmosphere-Transport=websocket&X-Cache-Date=0&Content-Type=application/json core.js:2298
Websocket successfully opened 

但是，当我尝试发布数据 (subSocket.push(...)) 时，似乎什么也没发生。我曾尝试调试 AtmosphereHandlerService，但它似乎从未被击中（并且没有生成任何日志。

我错过了什么会导致这种情况？

到目前为止，我有以下内容：

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:j2ee="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee    http://java.sun.com/xml/ns/j2ee/web-app_2.5.xsd">
    <description>AtmosphereServlet</description>
    <display-name>AtmosphereServlet</display-name>
    <servlet>
        <description>AtmosphereServlet</description>
        <servlet-name>AtmosphereServlet</servlet-name>
        <servlet-class>org.atmosphere.cpr.AtmosphereServlet</servlet-class>
        <!-- If you want to use Servlet 3.0 -->
        <!-- <async-supported>true</async-supported> -->
        <!-- List of init-param --> 
    </servlet>
    <servlet-mapping>
        <servlet-name>AtmosphereServlet</servlet-name>
        <!-- Any mapping -->
        <url-pattern>/chat/*</url-pattern>
    </servlet-mapping>
</web-app>

ChatAtmosphereHandler.java

@AtmosphereHandlerService(path = "/chat")
public class ChatAtmosphereHandler implements AtmosphereHandler 

    public void onRequest(AtmosphereResource resource) throws IOException 

        AtmosphereRequest request = resource.getRequest();

        if (request.getMethod().equalsIgnoreCase("GET")) 
            resource.suspend();
         else if (request.getMethod().equalsIgnoreCase("POST")) 
            resource.getBroadcaster().broadcast(request.getReader().readLine().trim());
        

    

    public void onStateChange(AtmosphereResourceEvent event) throws IOException 

        AtmosphereResource resource = event.getResource();
        AtmosphereResponse response = resource.getResponse();

        if (resource.isSuspended()) 

            response.getWriter().write("Hello");

            switch (resource.transport()) 
                case JSONP:
                case LONG_POLLING:
                    event.getResource().resume();
                    break;
                case WEBSOCKET:
                case STREAMING:
                    response.getWriter().flush();
                    break;
            

         else if (!event.isResuming()) 
            event.broadcaster().broadcast("bye bye");
        

    

    public void destroy()  
    

Maven 依赖项：

 <dependency>
        <groupId>org.atmosphere</groupId>
        <artifactId>atmosphere-runtime</artifactId>
        <version>1.0.2</version>
    </dependency>
    <dependency>
        <groupId>org.atmosphere</groupId>
        <artifactId>atmosphere-jersey</artifactId>
        <version>1.0.2</version>
    </dependency>
    <dependency>
        <groupId>eu.infomas</groupId>
        <artifactId>annotation-detector</artifactId>
        <version>3.0.1</version>
    </dependency>

最后是javascript：

$(document).ready(function() 

    var socket = $.atmosphere;
    var subSocket = null;

    var request =  
        url: 'http://localhost:8080/web-transport/' + 'chat',
        contentType : "application/json",
        logLevel : 'debug',
        transport : 'websocket' ,
        fallbackTransport: 'long-polling'
    ;

    request.onOpen = function(response) 
        console.log('onopen', response);
    ;

    request.onReconnect = function (request, response) 
        console.log('onreconnect', request, response);
    ;

    request.onMessage = function (response) 
        console.log('onmessage', response);
    ;

    request.onError = function(response) 
        console.log('onerror', response);
    ;

    $('#send').click(function()
        subSocket.push(JSON.stringify( author: 'me', message: 'hello' ));
    );

    $('#subscribe').click(function()
        subSocket = socket.subscribe(request);
    );

);

【参考方案1】：

我终于发现问题不在于代码或氛围，而在于 Glassfish。

解决方案是使用以下命令启用 Web 套接字：

asadmin set configs.config.server-config.network-config.protocols.protocol.http-listener-1.http.websockets-support-enabled=true

确保使用命令提示符运行命令。我之前通过管理 gui 启用了 Web 套接字，但不知何故，它似​​乎没有正确应用。在我运行上述命令并尝试上述代码后，它运行良好。