Question

我使用Spring WebSockets 4.1.6，Tomcat 7.0.54和Apache 2.4.16作为Web服务器运行一个简单的应用程序时遇到了麻烦。

我在网上看过很多帖子，但我不知道发生了什么。服务器启动没有问题。我在我的服务器项目中发布了一个index.html，它启动了一个WebSocket连接。

如果我直接从Tomcat访问此文件，它可以很好地工作。

http://localhost:8080/myserver/messaging/index.html

但是，如果我从Apache Server访问此文件，它就无法正常工作。

http://localhost/messages/messaging/index.html

在我的Apache服务器中，我配置了代理传递：

ProxyPass           /messages http://localhost:8080/myserver
ProxyPassReverse    /messages http://localhost:8080/myserver

我的服务器WebSocket配置如下所示：

@Configuration
@EnableWebSocketMessageBroker
public class PuiWebSocketConfig extends
    AbstractWebSocketMessageBrokerConfigurer {

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.setApplicationDestinationPrefixes("/app");
        config.enableSimpleBroker("/user", "/topic");
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/puimessaging").withSockJS();
    }
}

我的客户端按如下方式进行连接：

function connect() {
    var socket = new SockJS('/server/puimessaging');
    var stompClient = Stomp.over(socket);
    var headers = {
        puiSessionId : 'a1234567890z'
    };
    stompClient.connect(headers, function(frame) {
        setConnected(true);
        stompClient.subscribe('/user/a1234567890z/response', function(data) {
            ...
        });
    });
}

服务器抛出错误，说我需要启用异步支持，但我不知道该怎么做。

Async support must be enabled on a servlet and for all filters involved
in async request processing. This is done in Java code using the Servlet
API or by adding "<async-supported>true</async-supported>" to servlet and
filter declarations in web.xml. Also you must use a Servlet 3.0+ container

我尝试在我的web.xml文件中添加该属性，但它不起作用：

<servlet>
    <servlet-name>spring-mvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
    <async-supported>true</async-supported>
</servlet>

<servlet-mapping>
    <servlet-name>spring-mvc</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

有什么想法吗？

提前致谢。

马克

Answer 1

我让它工作，不是通过WebSockets，而是通过xhr_streaming。我的配置如下：

Web.xml中

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="webApp" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">

    <servlet>
        <servlet-name>spring-mvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>

    <servlet-mapping>
        <servlet-name>spring-mvc</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
        <async-supported>true</async-supported>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

Tomcat（server.xml）：

<Connector URIEncoding="UTF-8" connectionTimeout="20000"
        port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol"
        redirectPort="8443" />

Apache httpd：

...
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule proxy_express_module modules/mod_proxy_express.so
LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so
LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
# LoadModule proxy_html_module modules/mod_proxy_html.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_scgi_module modules/mod_proxy_scgi.so
LoadModule proxy_wstunnel_module modules/mod_proxy_wstunnel.so
...
ProxyPass   /pideweb-gijon  http://localhost:8080/pideweb_gijon
ProxyPassReverse    /pideweb-gijon  http://localhost:8080/pideweb_gijon
ProxyPass   /pideweb-gijon/endpointpuisocket/   ws://localhost:8080/pideweb_gijon/endpointpuisocket/
ProxyPassReverse    /pideweb-gijon/endpointpuisocket/   ws://localhost:8080/pideweb_gijon/endpointpuisocket/

Spring配置：

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {

    @Autowired
    private WebSocketService websocketService;

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.setApplicationDestinationPrefixes("/app");
        config.enableSimpleBroker("/user", "/topic");
        // config.setUserDestinationPrefix("/user");
        // config.enableSimpleBroker("/queue", "/topic");
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/endpointpuisocket").withSockJS();
    }

    @Override
    public void configureClientInboundChannel(ChannelRegistration registration) {
        ChannelInterceptorAdapter interceptor = new ChannelInterceptorAdapter() {

            @Override
            public Message<?> preSend(Message<?> message, MessageChannel channel) {
                // store or remove the Session ID in the list depending on the
                // message is for Connecting or Disconnecting
                StompHeaderAccessor accessor = StompHeaderAccessor
                        .wrap(message);
                StompCommand command = accessor.getCommand();
                List<String> headersSessionId = accessor
                        .getNativeHeader("puiSessionId");
                if (!CollectionUtils.isEmpty(headersSessionId)) {
                    String sessionId = headersSessionId.get(0);

                    switch (command) {
                    case CONNECT:
                        // add the session ID
                        websocketService.addSession(sessionId);
                        break;
                    case DISCONNECT:
                        // remove the session ID
                        websocketService.removeSession(sessionId);
                        break;
                    default:
                        break;
                    }
                }

                return message;
            }
        };
        registration.setInterceptors(interceptor);
    }

}

Javascript客户端：

function(gst) {
    var url = '/pideweb-gijon/endpointpuisocket';
    var socket = new SockJS(url);
    var stompClient = Stomp.over(socket);
    var headers = {
        puiSessionId : gst
    };

    var self = this;
    stompClient.connect(headers, function(frame) {
        console.log('Connected: ' + frame);
        self.stompClient.subscribe('/user/' + gst + '/response', function(data) {
            console.log(data.body);
        });
    });
};

这样，当我进入客户端时，会自动尝试连接到服务器。我使用的是Chrome，这是一堆请求：

信息请求 info request

Websocket请求 websocket request

XHR_streaming请求 xhr_streaming request

有人知道Websocket请求会发生什么吗？

谢谢！

Answer 2

为此，您需要更新tomcat连接器，进入tomcat目录 - ＆gt; conf - ＆gt; server.xml中。找到以下行：

<Connector connectionTimeout="20000" maxThreads="1000" port="8080" protocol="org.apache.coyote.http1.1"/>

它应该是类似的东西，请注意协议，并将其更改为：

<Connector connectionTimeout="20000" maxThreads="1000" port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol"/>

重启你的tomcat。

Answer 3

知道Tomcat一切正常，Apache配置可能存在问题。

默认情况下，Apache不支持websocket UPGRADE，您需要安装+ configure mod_proxy_wstunnel。

您可能必须确保mod_proxy处于HTTP模式（即不是AJP），并且如果您希望各种SockJS传输工作，则可以正确支持HTTP持久连接。

带有Tomcat 7.0.54和Apache 2.4的Spring Websockets 4.1.6

3 个答案: