Question

我正在努力尝试使用在我的eclipse环境中本地运行的大气2.0.3 tomcat 7.0.42来获得简单的基础实现（也可以从外部机器连接以查看与wireshark的流量）。我遇到的问题是无论我使用什么传输，websocket，sse，轮询，长轮询，广播响应似乎永远不会到达客户端，并且永远不会调用response.OnMessage处理程序。我在运行时没有收到异常，我尝试过使用firefox / chrome /和IE。我也使用了wireshark，我在包含我的消息响应的聊天消息的帖子后看到一个数据包：“HTTP - Continuation或非HTTP流量”，在数据包数据中我可以看到发送给客户端的消息，所以它出现服务器端正常工作。建立与服务器的初始连接，并按预期调用js onOpen处理程序。

我正在做的工作主要基于大气样本聊天应用程序。如果有人有任何建议，我将不胜感激。可能还值得一提的是，我在大气样本的实际聊天处理程序，js和html页面中添加了它也没有表现，并且onMessage js处理程序也没有被调用，所以我认为它是一个配置问题。

的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>

的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（已经尝试过polling / long-polling / sse / websockets并且最初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('');
});

Answer 1

如果在客户端设置trackMessageLength：true，则必须安装TrackMessageLengthInterceptor。所以将它添加到AtmosphereHandlerService的拦截器列表中。

- Jeanfrancois

大气响应，广播不调用javascript onMessage处理程序

1 个答案: