我正在使用一个Spring 4应用程序（Spring Boot不幸的是，不是），但我无法使Web套接字正常工作。有一个简单的TextWebSocketHandler实现，我在注册/ws路径，我做得到一个确认日志：
将URL路径[/ ws]映射到类型为[class org.springframework.web.socket.server.support.WebSocketHttpRequestHandler]的处理程序上
...但是我无法使用网络浏览器中的地址进行连接。我已经尝试过这种基于注释的配置：
@Slf4j
@Configuration
@EnableWebSocket
public class WebSocketConfiguration implements WebSocketConfigurer {
public static final String WEB_SOCKET_PATH = "/ws";
@Autowired
private WebSocketService handler;
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
log.info("Registering web socket handler {} at '{}'.", handler, WEB_SOCKET_PATH);
registry.addHandler(handler, WEB_SOCKET_PATH);
}
}
我可以确认的WebSocketService handler值不是null，并且实际上实现了该WebSocketHandler接口。当配置器明显被触发时，连接会"ws://localhost:8081/ws"导致错误：
WebSocket与“ ws：// localhost：8081 / ws”的连接失败：WebSocket握手期间出错：意外的响应代码：404
错误{目标：WebSocket，isTrusted：true，currentTarget：WebSocket，eventPhase：2，气泡：false，可取消：false，defaultPrevented：false，时间戳：1469616712980247，originalTarget：WebSocket，explicitOriginalTarget：WebSocket，NONE：0}
我用来测试Web套接字机制的客户端代码非常简单：
var ws = new WebSocket("ws://localhost:8081/ws");
ws.onerror = function(e) { console.log(e); }
ws.onopen = function() { console.log("Opened"); }
我什至尝试通过XML配置注册处理程序，但是虽然我得到的日志几乎相同，但仍然无法正常工作。请注意，我正在使用Jetty 9的许多默认配置（通过Gretty Gradle插件）运行该应用程序。
通过Spring调试日志时，我只能猜测Spring无法将HTTP请求提升为Web套接字连接：
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 1 of 13 in additional filter chain; firing Filter: 'SecurityContextPersistenceFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - Obtained a valid SecurityContext from SPRING_SECURITY_CONTEXT: 'org.springframework.security.core.context.SecurityContextImpl@4190548c: Authentication: org.springframework.security.authentication.UsernamePasswordAuthenticationToken@4190548c: Principal: org.springframework.security.core.userdetails.User@58c7c40: Username: [removed]; Password: [PROTECTED]; Enabled: true; AccountNonExpired: true; credentialsNonExpired: true; AccountNonLocked: true; Granted Authorities: ROLE_USER; Credentials: [PROTECTED]; Authenticated: true; Details: org.springframework.security.web.authentication.WebAuthenticationDetails@12afc: RemoteIpAddress: 127.0.0.1; SessionId: 1om9yxo93cwce1qb1tu0rcs15n; Granted Authorities: ROLE_USER'
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 2 of 13 in additional filter chain; firing Filter: 'ConcurrentSessionFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 3 of 13 in additional filter chain; firing Filter: 'WebAsyncManagerIntegrationFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 4 of 13 in additional filter chain; firing Filter: 'HeaderWriterFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 5 of 13 in additional filter chain; firing Filter: 'LogoutFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - Checking match of request : '/ws'; against '/logout'
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 6 of 13 in additional filter chain; firing Filter: 'UsernamePasswordAuthenticationFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - Request 'GET /ws' doesn't match 'POST /securityCheck
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 7 of 13 in additional filter chain; firing Filter: 'BasicAuthenticationFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 8 of 13 in additional filter chain; firing Filter: 'RequestCacheAwareFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 9 of 13 in additional filter chain; firing Filter: 'SecurityContextHolderAwareRequestFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 10 of 13 in additional filter chain; firing Filter: 'AnonymousAuthenticationFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - SecurityContextHolder not populated with anonymous token, as it already contained: 'org.springframework.security.authentication.UsernamePasswordAuthenticationToken@4190548c: Principal: org.springframework.security.core.userdetails.User@58c7c40: Username: [removed]; Password: [PROTECTED]; Enabled: true; AccountNonExpired: true; credentialsNonExpired: true; AccountNonLocked: true; Granted Authorities: ROLE_USER; Credentials: [PROTECTED]; Authenticated: true; Details: org.springframework.security.web.authentication.WebAuthenticationDetails@12afc: RemoteIpAddress: 127.0.0.1; SessionId: 1om9yxo93cwce1qb1tu0rcs15n; Granted Authorities: ROLE_USER'
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 11 of 13 in additional filter chain; firing Filter: 'SessionManagementFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 12 of 13 in additional filter chain; firing Filter: 'ExceptionTranslationFilter'
13:14:02.322 [qtp1305935114-14] DEBUG - /ws at position 13 of 13 in additional filter chain; firing Filter: 'FilterSecurityInterceptor'
13:14:02.322 [qtp1305935114-14] DEBUG - Checking match of request : '/ws'; against '/login*'
13:14:02.322 [qtp1305935114-14] DEBUG - Secure object: FilterInvocation: URL: /ws; Attributes: [ROLE_USER]
13:14:02.322 [qtp1305935114-14] DEBUG - Previously Authenticated: org.springframework.security.authentication.UsernamePasswordAuthenticationToken@4190548c: Principal: org.springframework.security.core.userdetails.User@58c7c40: Username: [removed]; Password: [PROTECTED]; Enabled: true; AccountNonExpired: true; credentialsNonExpired: true; AccountNonLocked: true; Granted Authorities: ROLE_USER; Credentials: [PROTECTED]; Authenticated: true; Details: org.springframework.security.web.authentication.WebAuthenticationDetails@12afc: RemoteIpAddress: 127.0.0.1; SessionId: 1om9yxo93cwce1qb1tu0rcs15n; Granted Authorities: ROLE_USER
13:14:02.322 [qtp1305935114-14] DEBUG - Voter: org.springframework.security.access.vote.RoleVoter@b5de58f, returned: 1
13:14:02.322 [qtp1305935114-14] DEBUG - Authorization successful
13:14:02.322 [qtp1305935114-14] DEBUG - RunAsManager did not change Authentication object
13:14:02.322 [qtp1305935114-14] DEBUG - /ws reached end of additional filter chain; proceeding with original chain
13:14:02.323 [qtp1305935114-14] DEBUG - Not injecting HSTS header since it did not match the requestMatcher org.springframework.security.web.header.writers.HstsHeaderWriter$SecureRequestMatcher@425f619f
13:14:02.324 [qtp1305935114-14] DEBUG - Chain processed normally
13:14:02.324 [qtp1305935114-14] DEBUG - SecurityContextHolder now cleared, as request processing completed
浏览了官方文档和示例后，似乎Web套接字配置是非常标准的。为了在Spring中启用Web套接字，我可能错过了什么，或者可能需要更改任何配置吗？
事实证明，Web套接字可以按预期工作，但未在/*中设置Spring servlet映射web.xml：
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/spring/*</url-pattern>
</servlet-mapping>
真傻，我要做的就是将地址更改为ws://localhost:8081/spring/ws。让我措手不及的是，一些Spring过滤器被映射到了一个事实，/*而我给人的印象是Spring servlet共享了这种映射-毕竟，调用ws://localhost:8081/ws触发了一些Spring的东西（如日志中所示）。
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