feat: add http transport interface (#1533)

feat: add http transport interface

middleware/tracing/span.go

@@ -26,7 +26,7 @@ func setClientSpan(ctx context.Context, span trace.Span, m interface{}) {
 		operation = tr.Operation()
 		rpcKind = tr.Kind().String()
 		if tr.Kind() == transport.KindHTTP {
-			if ht, ok := tr.(*http.Transport); ok {
+			if ht, ok := tr.(http.Transporter); ok {
 				method := ht.Request().Method
 				route := ht.PathTemplate()
 				path := ht.Request().URL.Path
@@ -61,7 +61,7 @@ func setServerSpan(ctx context.Context, span trace.Span, m interface{}) {
 		operation = tr.Operation()
 		rpcKind = tr.Kind().String()
 		if tr.Kind() == transport.KindHTTP {
-			if ht, ok := tr.(*http.Transport); ok {
+			if ht, ok := tr.(http.Transporter); ok {
 				method := ht.Request().Method
 				route := ht.PathTemplate()
 				path := ht.Request().URL.Path

transport/http/transport.go

@@ -7,7 +7,14 @@ import (
 	"github.com/go-kratos/kratos/v2/transport"
 )
 
-var _ transport.Transporter = &Transport{}
+var _ Transporter = &Transport{}
+
+// Transporter is http Transporter
+type Transporter interface {
+	transport.Transporter
+	Request() *http.Request
+	PathTemplate() string
+}
 
 // Transport is an HTTP transport.
 type Transport struct {