sse panic on fasthttphandler

[ysk229]

Senario:

func sseHandlerGin(c *gin.Context) {
   // Set headers for Server-Sent Events
   c.Header("Content-Type", "text/event-stream")
   c.Header("Cache-Control", "no-cache")
   c.Header("Connection", "keep-alive")
   // Stream data to the client
   ticker := time.NewTicker(5 * time.Second)
   defer ticker.Stop()
   for {
   	select {
   	case <-ticker.C:
   		data := fmt.Sprintf("data: %s\n\n", "New data available at: "+time.Now().String())
   		c.Stream(func(w io.Writer) bool {
   			_, _ = w.Write([]byte(data))
   			return false
   		})
   	}
   }
} 

engine := gin.Default()
engine.GET("/sse",sseHandlerGin)
if err := fasthttp.ListenAndServe(":8080", fasthttpadaptor.NewFastHTTPHandler(engine)); err != nil {
   panic(err)
} 

i've got these panic error log.

interface conversion: *fasthttpadaptor.netHTTPResponseWriter is not http.CloseNotifier: missing method CloseNotify
C:/Users/xxgo/go/go1.20.10/src/runtime/iface.go:92 (0x8ba444)
   getitab: panic(&TypeAssertionError{concrete: typ, asserted: &inter.typ, missingMethod: m.init()})
C:/Users/xxgo/go/go1.20.10/src/runtime/iface.go:429 (0x8bb23c)
   assertI2I: return getitab(inter, tab._type, false)
C:/Users/xxgo/go/pkg/mod/github.com/gin-gonic/gin@v1.9.1/response_writer.go:117 (0xb4d34b)
   (*responseWriter).CloseNotify: return w.ResponseWriter.(http.CloseNotifier).CloseNotify()
C:/Users/xxgo/go/pkg/mod/github.com/gin-gonic/gin@v1.9.1/context.go:1084 (0xb47a14)
   (*Context).Stream: clientGone := w.CloseNotify()
E:/code/go/408/cmd/see_fasthttp.go:27 (0xb7f738)
   sseHandlerGin: c.Stream(func(w io.Writer) bool {
C:/Users/xxgo/go/pkg/mod/github.com/gin-gonic/gin@v1.9.1/context.go:174 (0xb4c2c1)
   (*Context).Next: c.handlers[c.index](c)
C:/Users/xxgo/go/pkg/mod/github.com/gin-gonic/gin@v1.9.1/recovery.go:102 (0xb4c2ac)
   CustomRecoveryWithWriter.func1: c.Next()
C:/Users/xxgo/go/pkg/mod/github.com/gin-gonic/gin@v1.9.1/context.go:174 (0xb4b3e6)
   (*Context).Next: c.handlers[c.index](c)
C:/Users/xxgo/go/pkg/mod/github.com/gin-gonic/gin@v1.9.1/logger.go:240 (0xb4b3c9)
   LoggerWithConfig.func1: c.Next()
C:/Users/xxgo/go/pkg/mod/github.com/gin-gonic/gin@v1.9.1/context.go:174 (0xb4a48a)
   (*Context).Next: c.handlers[c.index](c)
C:/Users/xxgo/go/pkg/mod/github.com/gin-gonic/gin@v1.9.1/gin.go:620 (0xb4a111)
   (*Engine).handleHTTPRequest: c.Next()
C:/Users/xxgo/go/pkg/mod/github.com/gin-gonic/gin@v1.9.1/gin.go:576 (0xb49dbc)
   (*Engine).ServeHTTP: engine.handleHTTPRequest(c)
C:/Users/xxgo/go/pkg/mod/github.com/valyala/fasthttp@v1.51.0/fasthttpadaptor/adaptor.go:58 (0xb7e8f3)
   NewFastHTTPHandler.func1: h.ServeHTTP(&w, r.WithContext(ctx))
C:/Users/xxgo/go/pkg/mod/github.com/valyala/fasthttp@v1.51.0/server.go:2359 (0xb730f2)
   (*Server).serveConn: s.Handler(ctx)
C:/Users/xxgo/go/pkg/mod/github.com/valyala/fasthttp@v1.51.0/workerpool.go:224 (0xb7b048)
   (*workerPool).workerFunc: if err = wp.WorkerFunc(c); err != nil && err != errHijacked {
C:/Users/xxgo/go/pkg/mod/github.com/valyala/fasthttp@v1.51.0/workerpool.go:196 (0xb7adb7)

[RedCrazyGhost]

There's something wrong with your usage.
gin does not currently support fasthttp
Reference Add support for fasthttp or fasthttprouter #498

- if err := fasthttp.ListenAndServe(":8080", fasthttpadaptor.NewFastHTTPHandler(engine)); err != nil {
-   panic(err)
- }
+ engine.Run(":8080")