chore(context): http.CloseNotify is deprecated, use context.Done instead

Signed-off-by: 0xff-dev <stevenshuang521@gmail.com>

context.go

@@ -1137,10 +1137,9 @@ func (c *Context) SSEvent(name string, message any) {
 // indicates "Is client disconnected in middle of stream"
 func (c *Context) Stream(step func(w io.Writer) bool) bool {
 	w := c.Writer
-	clientGone := w.CloseNotify()
 	for {
 		select {
-		case <-clientGone:
+		case <-c.Request.Context().Done():
 			return true
 		default:
 			keepOpen := step(w)

context_test.go

@@ -2531,6 +2531,7 @@ func CreateTestResponseRecorder() *TestResponseRecorder {
 func TestContextStream(t *testing.T) {
 	w := CreateTestResponseRecorder()
 	c, _ := CreateTestContext(w)
+	c.Request, _ = http.NewRequest(http.MethodGet, "", nil)
 
 	stopStream := true
 	c.Stream(func(w io.Writer) bool {
@@ -2550,10 +2551,12 @@ func TestContextStream(t *testing.T) {
 func TestContextStreamWithClientGone(t *testing.T) {
 	w := CreateTestResponseRecorder()
 	c, _ := CreateTestContext(w)
+	done, cancel := context.WithCancel(context.Background())
+	c.Request, _ = http.NewRequestWithContext(done, http.MethodGet, "", nil)
 
 	c.Stream(func(writer io.Writer) bool {
 		defer func() {
-			w.closeClient()
+			cancel()
 		}()
 
 		_, err := writer.Write([]byte("test"))