【发布时间】：2014-01-11 12:28:03
【问题描述】：
我尝试从 spring 站点运行此示例：tutorial 除了 Spring Boot 部分。
Web.xml
<web-app>
<display-name>Archetype Created Web Application</display-name>
<servlet>
<servlet-name>sample</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextClass</param-name>
<param-value>
org.springframework.web.context.support.AnnotationConfigWebApplicationContext
</param-value>
</init-param>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
com.evgeni.websock.WebSocketConfig
</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>sample</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
Java 配置：
@Configuration
@ComponentScan(basePackages = {"com.evgeni.controller"})
@EnableWebSocketMessageBroker
@EnableWebMvc
public class WebSocketConfig extends WebMvcConfigurerAdapter implements WebSocketMessageBrokerConfigurer {
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/hello").withSockJS();
}
public void configureClientInboundChannel(ChannelRegistration registration) {
// TODO Auto-generated method stub
}
public void configureClientOutboundChannel(ChannelRegistration registration) {
// TODO Auto-generated method stub
}
public void configureMessageBroker(MessageBrokerRegistry registry) {
registry.enableSimpleBroker("/topic");
registry.setApplicationDestinationPrefixes("/app");
}
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/css/**").addResourceLocations("/css/").setCachePeriod(31556926);
registry.addResourceHandler("/img/**").addResourceLocations("/img/").setCachePeriod(31556926);
registry.addResourceHandler("/js/**").addResourceLocations("/js/").setCachePeriod(31556926);
}
}
控制器：
@Controller
public class GreetingController {
@MessageMapping("/hello")
@SendTo("/topic/greetings")
public Greeting greeting(HelloMessage message) throws Exception {
Thread.sleep(3000); // simulated delay
System.out.println(message.getName());
return new Greeting("Hello, " + message.getName() + "!");
}
}
index.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<title>Hello WebSocket</title>
<script src="<c:url value='/js/sockjs-0.3.js'/>"></script>
<script src="<c:url value='/js/stomp.js'/>"></script>
<script type="text/javascript">
var stompClient = null;
function setConnected(connected) {
document.getElementById('connect').disabled = connected;
document.getElementById('disconnect').disabled = !connected;
document.getElementById('conversationDiv').style.visibility = connected ? 'visible' : 'hidden';
document.getElementById('response').innerHTML = '';
}
function connect() {
var socket = new SockJS("<c:url value='/hello'/>");
stompClient = Stomp.over(socket);
stompClient.connect('', '', function(frame) {
setConnected(true);
console.log('Connected: ' + frame);
stompClient.subscribe("<c:url value='/topic/greetings'/>", function(greeting){
showGreeting(JSON.parse(greeting.body).content);
});
});
}
function disconnect() {
stompClient.disconnect();
setConnected(false);
console.log("Disconnected");
}
function sendName() {
var name = document.getElementById('name').value;
stompClient.send("<c:url value='/app/hello'/>", {}, JSON.stringify({ 'name': name }));
}
function showGreeting(message) {
var response = document.getElementById('response');
var p = document.createElement('p');
p.style.wordWrap = 'break-word';
p.appendChild(document.createTextNode(message));
response.appendChild(p);
}
</script>
</head>
<body>
<noscript><h2 style="color: #ff0000">Seems your browser doesn't support Javascript! Websocket relies on Javascript being enabled. Please enable
Javascript and reload this page!</h2></noscript>
<div>
<div>
<button id="connect" onclick="connect();">Connect</button>
<button id="disconnect" disabled="disabled" onclick="disconnect();">Disconnect</button>
</div>
<div id="conversationDiv">
<label>What is your name?</label><input type="text" id="name" />
<button id="sendName" onclick="sendName();">Send</button>
<p id="response"></p>
</div>
</div>
</body>
</html>
一切都和教程一样，只是我从web.xml加载的conf和jsp中的2-3 c:url添加了项目的根目录。
当我点击连接然后发送时，在浏览器控制台中我得到：
Opening Web Socket... stomp.js:122
Web Socket Opened... stomp.js:122
>>> CONNECT
login:
passcode:
accept-version:1.1,1.0
heart-beat:10000,10000
stomp.js:122
<<< ERROR
message:Illegal header\c 'login\c'. A header must be of the form <name>\c<value>
content-length:0
stomp.js:122
>>> SEND
destination:/websock/app/hello
content-length:14
{"name":"asd"}
我认为问题出在 Sock js 的连接函数中
stompClient.connect('', '', function(frame) {...
我正在传递 '' 以获取登录名和密码。
编辑：
当我将连接函数更改为stompClient.connect('random', 'random', 时，控制台中的响应是：
Opening Web Socket... stomp.js:122
Web Socket Opened... stomp.js:122
>>> CONNECT
login:asd
passcode:asd
accept-version:1.1,1.0
heart-beat:10000,10000
stomp.js:122
<<< CONNECTED
heart-beat:0,0
version:1.1
stomp.js:122
connected to server undefined stomp.js:122
Connected: CONNECTED
version:1.1
heart-beat:0,0
(index):23
>>> SUBSCRIBE
id:sub-0
destination:/websock/topic/greetings
stomp.js:122
>>> SEND
destination:/websock/app/hello
content-length:14
{"name":"asd"}
但消息没有传递给控制器。
【问题讨论】：
-
您是否使用可执行 jars 和嵌入式 tomcat，就像那篇文章中所说的那样？还是别的什么？
-
我使用 STS 的 Tomcat 7.0.47。我如何检查它是否支持 websocket？
-
刚刚改变了我的问题，抱歉 :) 那么你是嵌入它还是部署到外部实例？
-
我不知道嵌入式或外部是什么意思。我将服务器添加到 STS 并使用 Run as -> Run on server 运行应用程序。感谢您的回复。
-
嗨，Evgeni，我也在做同样的事情并面临问题，也许你可以帮忙。 stackoverflow.com/questions/21877373/…
标签： java spring jsp spring-mvc websocket