我正在将github.com/gorilla/websocket
用于websocket。我有这个代码
type CONN struct {
Conn *websocket.Conn
Username string
hand []string
mu *sync.Mutex
}
func (c *CONN) Send(messageType int, message []byte) error {
c.mu.Lock()
defer c.mu.Unlock()
return c.Conn.WriteMessage(messageType, message)
}
//later...
connection.Send(messageType, []byte("play"))
connection.Send(messageType, []byte("[\"a\", \"b\", \"c\"]"))
这最后两行给了我错误。请让我知道是否需要更多代码来解决。这是错误:
2019/06/15 15:19:03 http: panic serving [::1]:56788: concurrent write to websocket connection
goroutine 10 [running]:
net/http.(*conn).serve.func1(0xc000164140)
/usr/lib64/go/1.11/src/net/http/server.go:1746 +0xd0
panic(0x6654e0, 0x7125a0)
/usr/lib64/go/1.11/src/runtime/panic.go:513 +0x1b9
github.com/gorilla/websocket.(*messageWriter).flushFrame(0xc000043a18, 0xc000016501, 0xc00001656c, 0x0, 0x4, 0x713e00, 0xc0001141e0)
/home/victor/programs/goprograms/src/github.com/gorilla/websocket/conn.go:597 +0x631
github.com/gorilla/websocket.(*Conn).WriteMessage(0xc0001a4160, 0x1, 0xc000016568, 0x4, 0x8, 0x4, 0xc000016568)
/home/victor/programs/goprograms/src/github.com/gorilla/websocket/conn.go:753 +0x24b
main.(*CONN).Send(0xc00015c280, 0x1, 0xc000016568, 0x4, 0x8, 0x0, 0x0)
/home/victor/programs/goprograms/src/v/asdf/network/main.go:32 +0x9e
main.wsHandler(0x716960, 0xc00011e380, 0xc000116400)
/home/victor/programs/goprograms/src/v/asdf/network/main.go:68 +0x501
net/http.HandlerFunc.ServeHTTP(0x6e1ab0, 0x716960, 0xc00011e380, 0xc000116400)
/usr/lib64/go/1.11/src/net/http/server.go:1964 +0x44
net/http.(*ServeMux).ServeHTTP(0x8dadc0, 0x716960, 0xc00011e380, 0xc000116400)
/usr/lib64/go/1.11/src/net/http/server.go:2361 +0x127
net/http.serverHandler.ServeHTTP(0xc00008d040, 0x716960, 0xc00011e380, 0xc000116400)
/usr/lib64/go/1.11/src/net/http/server.go:2741 +0xab
net/http.(*conn).serve(0xc000164140, 0x716b60, 0xc00005a800)
/usr/lib64/go/1.11/src/net/http/server.go:1847 +0x646
created by net/http.(*Server).Serve
/usr/lib64/go/1.11/src/net/http/server.go:2851 +0x2f5
Here is the full code I am using-设置连接的第75行。我看不到地图中的一个项目下怎么可能有多个连接。
答案 0 :(得分:0)
您的func wsHandler(w http.ResponseWriter, r *http.Request)
未在全局变量映射connections
上正确同步
每次对wsHandler
的调用都是在单独的goroutine中进行的:
来自https://golang.org/pkg/net/http/#Server.ListenAndServe
ListenAndServe侦听TCP网络地址srv.Addr,然后调用Serve处理传入连接上的请求。
并且来自https://golang.org/pkg/net/http/#Server.Serve
服务在侦听器l上接受传入连接,为每个连接创建一个新的服务goroutine。