Spring Boot：发布 SessionConnectedEvent 时出错

如何解决Spring Boot：发布 SessionConnectedEvent 时出错

我在一个项目上设置了 Spring Stomp，一切正常，但我一直在服务器日志中收到错误消息。

2021-02-17 05:02:26.875 ERROR 23773 --- [oundChannel-914] o.s.w.s.m.StompSubProtocolHandler        : Error publishing SessionConnectedEvent[Genericmessage [payload=byte[0],headers={simpMessageType=CONNECT_ACK,simpConnectMessage=Genericmessage [payload=byte[0],headers={simpMessageType=CONNECT,stompCommand=CONNECT,nativeHeaders={x_from_wss=[true],accept-version=[1.1,1.0],heart-beat=[0,0]},simpSessionAttributes={},simpHeartbeat=[J@1dbcdf26,simpuser=org.springframework.security.authentication.UsernamePasswordAuthenticationToken@cda212a8: Principal: me.xxxx.xxx.user.security.UserLoginDetails@325d7812; Credentials: [PROTECTED]; Authenticated: true; Details: org.springframework.security.web.authentication.WebAuthenticationDetails@957e: RemoteIpAddress: 127.0.0.1; SessionId: null; Not granted any authorities,simpSessionId=ml2gvecs}],simpSessionId=ml2gvecs}]]

我也尝试为 websocket 设置事件处理程序，但它仍然继续显示在日志中。我知道它是来自客户端的连接确认消息，但它不应该失败。任何建议将不胜感激。

解决方法

错误说：

 UsernamePasswordAuthenticationToken usernamePasswordAuthenticationToken= new UsernamePasswordAuthenticationToken(
                "AuthenticatedUserName","Credentials",Collections.singleton((GrantedAuthority) () -> "USER")
        );

如果您使用的是 Spring Security 之类的东西，请确保在通过身份验证后传递一组授权机构。

你可以这样做

//
collectionview.isPaging = false
//

class CollectionLayoutSubclass: UICollectionViewFlowLayout {

    override func targetContentOffset(forProposedContentOffset proposedContentOffset: CGPoint,withScrollingVelocity velocity: CGPoint) -> CGPoint {
        var point = super.targetContentOffset(forProposedContentOffset: proposedContentOffset,withScrollingVelocity: velocity)
        guard let collectionView = collectionView else {
            return point
        }
        let cells = collectionView.visibleCells
        let centerPoint = collectionView.center
        var cellFrame: CGRect = CGRect.zero
        for cell in cells {
            cellFrame = collectionView.convert(cell.frame,to: collectionView.superview)
            var newCenterPoint: CGPoint = centerPoint
            if velocity.x > 0 {
                newCenterPoint = CGPoint(x: centerPoint.x * 1.5,y: centerPoint.y)
            } else if velocity.x < 0 {
                newCenterPoint = CGPoint(x: centerPoint.x * 0.5,y: centerPoint.y)
            }
            guard cellFrame.contains(newCenterPoint) else {
                continue
            }
            let x = collectionView.frame.width / 2 - cell.frame.width / 2
            point.x = cell.frame.origin.x - x
            break
        }
        return point
    }
}

如果您没有使用 Spring Security，您可以通过 Channel Interceptor 设置一个 Authenticated User Token。

点击以下链接，了解如何为您的 WebSocket 连接设置通道拦截器

Websocket Authentication and Authorization in Spring