【go】gorilla/websocket如何判断客户端强制断开连接-Toy模板网

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当客户端因为某些问题异常关闭连接时，可以判断关闭连接的异常类型
通过调用websocket.IsCloseError或websocket.IsUnexpectedCloseError即可

if websocket.IsCloseError(err, websocket.Error类型) 
	fmt.Printf("预料到的错误:%s"，err.Error())
if websocket.IsUnexpectedcloseError(err) 
	fmt.Printf("未预料的错误")

其中github源码如下

func IsCloseError(err error, codes ...int) bool {
	if e, ok := err.(*CloseError); ok {
		for _, code := range codes {
			if e.Code == code {
				return true
			}
		}
	}
	return false
}

// IsUnexpectedCloseError returns boolean indicating whether the error is a
// *CloseError with a code not in the list of expected codes.
func IsUnexpectedCloseError(err error, expectedCodes ...int) bool {
	if e, ok := err.(*CloseError); ok {
		for _, code := range expectedCodes {
			if e.Code == code {
				return false
			}
		}
		return true
	}
	return false
}

异常类型如下文章来源地址https://www.toymoban.com/news/detail-562483.html

// Close codes defined in RFC 6455, section 11.7.
const (
	CloseNormalClosure           = 1000
	CloseGoingAway               = 1001
	CloseProtocolError           = 1002
	CloseUnsupportedData         = 1003
	CloseNoStatusReceived        = 1005
	CloseAbnormalClosure         = 1006
	CloseInvalidFramePayloadData = 1007
	ClosePolicyViolation         = 1008
	CloseMessageTooBig           = 1009
	CloseMandatoryExtension      = 1010
	CloseInternalServerErr       = 1011
	CloseServiceRestart          = 1012
	CloseTryAgainLater           = 1013
	CloseTLSHandshake            = 1015
)