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分享SSH框架，Websocket连接失败，求大神指导
环境：jdk8、tomcat8
使用的是Spring API for WebSocket，项目框架是SSH。
问题：websocket客户端一直连接失败，
报错信息：WebSocket connection to 'ws://192.168.1.110:8080/项目名/collectionList' failed: Error during WebSocket handshake: Unexpected response code: 404。
下面贴上前后台代码，求大神帮忙分析一下
使用的是Spring API for WebSocket，项目框架是SSH。
问题：websocket客户端一直连接失败，
报错信息：WebSocket connection to 'ws://192.168.1.110:8080/项目名/collectionList' failed: Error during WebSocket handshake: Unexpected response code: 404。
下面贴上前后台代码，求大神帮忙分析一下
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晓风吹雾 2016-06-15
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貌似不行 这个jar已经在工程中了[/quote]
说错了，是去除工程的jar包
<scope>provided</scope>
Try to not export your Websocket-library to your webserver, thus it uses its own implementation.
不要将Websocket-library导入到webserver
s09122289 2016-06-15
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貌似不行 这个jar已经在工程中了
晓风吹雾 2016-06-15
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The Error during the handshake happens, because Tomcat has its own api for websockets. Thus you might have added the JSR implementation or something similar as javax.websocket-api in your pom.xml there comes a conflict at runtime.
Try to not export your Websocket-library to your webserver, thus it uses its own implementation.
If you use maven, set the websocket dependency as provided:
<!-- Provided Websocket API, because tomcat has its own implementation -->
<dependency>
<groupId>javax.websocket</groupId>
<artifactId>javax.websocket-api</artifactId>
<version>1.1</version>
<scope>provided</scope>
</dependency>
意思就是说容器中存在自己javax.websocket-api，如果是maven编译的话， 你需要吧上面的库打包到工程中。
s09122289 2016-06-15
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楼主解决了吗 我也遇到类似问题了 能分享下解决思路吗
jollroy 2016-04-01
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这个地址/collectionList 你访问的到吗？
你直接在浏览器里访问这个地址看看
zhaojinmeng 2016-04-01
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这个地址/collectionList 你访问的到吗？
你直接在浏览器里访问这个地址看看[/quote] 在浏览器直接访问地址？这又不是http请求
zhaojinmeng 2016-04-01
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前台代码：
var websocket;
var host=window.location.host;
if ('WebSocket' in window) {
alert("WebSocket");
websocket = new WebSocket("ws://192.168.1.110:8080/项目名/collectionList");
}else {
alert("服务器不支持websocket");
return;
}
websocket.onopen = function (evnt) {
alert("链接服务器成功!")
};
websocket.onmessage = function (evnt) {
alert("接收到信息："+evnt.data);
};
websocket.onerror = function (evnt) {
alert("错误");
};
websocket.onclose = function (evnt) {
alert("与服务器断开了链接!")
}
zhaojinmeng 2016-03-31
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后台WebSocketConfig：
@Configuration
@EnableWebMvc
@EnableWebSocket
public class WebSocketConfig extends WebMvcConfigurerAdapter implements WebSocketConfigurer {
/**
* 注册websocket
*/
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
// 注册多个websocket服务，addHandler第一个参数是websocket的具体业务处理类，第二个参数collectionList相当于endpoint
registry.addHandler(RealSocketHandler(), "/collectionList").addInterceptors(new WebSocketHandshakeInterceptor());
// 可以注册多个websocket的endpoint
}
@Bean
public WebSocketHandler RealSocketHandler() {
return new RealSocketHandler();
}
}
zhaojinmeng 2016-03-31
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核心处理类
public class RealSocketHandler implements WebSocketHandler {
private static final ArrayList<WebSocketSession> clients = new ArrayList<WebSocketSession>();
private static Logger logger = Logger.getLogger(RealSocketHandler.class);
@Override
public void afterConnectionClosed(WebSocketSession session, CloseStatus arg1) throws Exception {
// TODO Auto-generated method stub
logger.debug("websocket connection closed");
System.out.println("afterConnectionClosed");
clients.remove(session);
}
//初次连接成功
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
// TODO Auto-generated method stub
logger.debug("connect to the websocket succcess ... ...");
System.out.println("afterConnectionEstablished");
clients.add(session);
String userName = (String) session.getAttributes().get("session_username");
if(userName!=null){
int count=5;
session.sendMessage(new TextMessage(count+""));
}
}
//接收消息处理信息
@Override
public void handleMessage(WebSocketSession session, WebSocketMessage<?> arg1) throws Exception {
// TODO Auto-generated method stub
System.out.println("handleMessage");
sendMessageToUsers(new TextMessage(arg1.getPayload()+""));
}
@Override
public void handleTransportError(WebSocketSession session, Throwable arg1) throws Exception {
// TODO Auto-generated method stub
System.out.println("handleTransportError");
logger.debug("websocket connection closed");
if(session.isOpen()){
session.close();
}
clients.remove(session);
}
@Override
public boolean supportsPartialMessages() {
// TODO Auto-generated method stub
return false;
}
/**
* 给所有在线用户发送消息
*
* @param message
*
*/
public void sendMessageToUsers(TextMessage message) {
for (WebSocketSession client : clients) {
try {
if (client.isOpen()) {
client.sendMessage(message);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 给某个用户发送消息
*
* @param userName
* @param message
*/
public void sendMessageToUser(String userName, TextMessage message) {
for (WebSocketSession client : clients) {
if (client.getAttributes().get("websocket_username").equals(userName)) {
try {
if (client.isOpen()) {
client.sendMessage(message);
}
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
}
}
zhaojinmeng 2016-03-31
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捂手过滤器：
public class WebSocketHandshakeInterceptor implements HandshakeInterceptor {
@SuppressWarnings("unused")
private static Logger logger = LoggerFactory.getLogger(HandshakeInterceptor.class);
@Override
public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Map<String, Object> attributes) throws Exception {
if (request instanceof ServletServerHttpRequest) {
ServletServerHttpRequest servletRequest = (ServletServerHttpRequest) request;
HttpSession session = servletRequest.getServletRequest().getSession(false);
String userName="systest";
if (session != null) {
//使用userName区分WebSocketHandler，以便定向发送消息
//String userName = (String) session.getAttribute("session_username");
if(userName != null){
attributes.put("websocket_username",userName);
}
}
}
return true;
}
@Override
public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Exception exception) {
}
}
