大气响应,广播不调用javascript onMessage处理程序

我正在使用amoat尝试使用在eclipse环境中本地运行的atmosphere 2.0.3 tomcat 7.0.42获得简单的基本实现(也可以从外部计算机连接以查看wireshark的流量).无论我使用哪种传输方式,websocket,sse,轮询,长轮询,我都遇到的问题是,广播响应似乎永远不会到达客户端和响应.永远不会调用OnMessage处理程序.我在运行时没有收到异常,并且我尝试使用firefox / chrome /和IE.我还使用了Wirehark,在包含我的消息响应的聊天消息发布后,我看到一个数据包：“ HTTP-Continuation或non-HTTP traffic”,并且在数据包数据中,我可以看到向客户端的传出消息,因此似乎服务器端工作正常.建立与服务器的初始连接,并按预期方式调用js onOpen处理程序.

我正在做的工作主要基于气氛示例聊天应用程序.如果有人有任何建议,我将不胜感激.可能还值得一提的是,我从大气示例中添加了实际的聊天处理程序,js和html页面,并且它也不起作用,并且也没有调用onMessage js处理程序,因此我认为它是一个配置问题.

web.xml

<servlet>
    <description>AtmosphereServlet</description>
    <servlet-name>AtmosphereServlet</servlet-name>
    <servlet-class>org.atmosphere.cpr.AtmosphereServlet</servlet-class>
   <init-param>
        <param-name>o.a.useWebSocket</param-name>
        <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>org.atmosphere.useNative</param-name>
      <param-value>true</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
    <async-supported>true</async-supported>
</servlet>
<servlet-mapping>
    <servlet-name>AtmosphereServlet</servlet-name>
    <url-pattern>/chat/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>AtmosphereServlet</servlet-name>
    <url-pattern>/chatSample/*</url-pattern>
</servlet-mapping>

POM.xml

<dependency>
  <groupId>javax.activation</groupId>
  <artifactId>activation</artifactId>
  <version>1.1.1</version>
</dependency>
<dependency>
    <groupId>org.atmosphere</groupId>
    <artifactId>atmosphere-compat-tomcat</artifactId>
    <version>1.0.15</version>
</dependency>
<dependency>
    <groupId>org.atmosphere</groupId>
    <artifactId>atmosphere-compat-tomcat7</artifactId>
    <version>1.0.15</version>
</dependency>
<dependency>
    <groupId>org.atmosphere</groupId>
    <artifactId>atmosphere-runtime</artifactId>
    <version>2.0.3</version>
</dependency>
<dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-core-asl</artifactId>
    <version>1.9.3</version>
</dependency>
<dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-mapper-asl</artifactId>
    <version>1.9.3</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
</dependency>

服务器端代码：

@AtmosphereHandlerService(path="/chat",
broadcasterCache = UUIDBroadcasterCache.class,
interceptors = { AtmosphereResourceLifecycleInterceptor.class,
                 BroadcastOnPostAtmosphereInterceptor.class,
                 HeartbeatInterceptor.class
               })
public class ChatController extends OnMessage<String> {

    private final ObjectMapper mapper = new ObjectMapper();

    @Override
    public void onMessage(AtmosphereResponse response, String message) throws IOException {
        response.write(mapper.writeValueAsString(mapper.readValue(message, Data.class)));
    }
}

客户端Javascript(已通过polling / long-polling / sse / websockets进行了尝试,并且所有初始都成功连接,并在初始连接后调用OnOpen处理程序：

var transport = 'long-polling';

var request = { url:'/Chat2/chat',
    contentType : "application/json",
    logLevel : 'debug',
    transport : transport,
    trackMessageLength : true,
    reconnectInterval : 5000,
    fallbackTransport: 'polling'};


request.onOpen = function(response) {
    console.log('OnOpen: Atmosphere connected using ' + response.transport );
    transport = response.transport;
};

request.onReopen = function(response) {
    console.log('OnReopen: connection reopened');
};


request.onTransportFailure = function(errorMsg, request) {
    atmosphere.util.info(errorMsg);
    if (window.EventSource) {
        request.fallbackTransport = "polling";
    }
    console.log('OnTransportFailure: Atmosphere Chat. Default transport is WebSocket, fallback is ' + request.fallbackTransport);
};

request.onMessage = function (response) {
    alert('OnMessage: message received');
};

request.onClose = function(response) {
    console.log('OnClose: Client closed the connection after a timeout');
    subSocket.push(atmosphere.util.stringifyJSON({ author: author, message: 'disconnecting' }));
};

request.onError = function(response) {
    console.log('OnError: error occurred');
    console.log(response);
    logged = false;
};

request.onReconnect = function(request, response) {
    console.log('OnReconnect: Reconnected');
};

subSocket = socket.subscribe(request);

$('#chatSubmit').click(function() {
    var msg = $('#chatText').val();

    subSocket.push(atmosphere.util.stringifyJSON({ author: author, message: msg }));
    $('#chatText').val('');
});

解决方法:

如果在客户端上设置trackMessageLength：true,则必须安装TrackMessageLengthInterceptor.因此,将其添加到AtmosphereHandlerService的拦截器列表中.

-让弗朗西斯(Jeanfrancois)

标签：chat,websocket,atmosphere,javascript,java
来源： https://codeday.me/bug/20191122/2061075.html