1 files changed, 17 insertions, 0 deletions

diff --git a/echo/middleware/alt_svc.go b/echo/middleware/alt_svc.go
new file mode 100644
index 0000000..27ab5ce
--- /dev/null
+++ b/echo/middleware/alt_svc.go
@@ -0,0 +1,17 @@
+package middleware
+
+import (
+        "fmt"
+
+        "github.com/labstack/echo/v4"
+)
+
+func Http3AltSvcMiddleware(port int) echo.MiddlewareFunc {
+        h3Svc := fmt.Sprintf(`h3=":%d"`, port)
+        return func(next echo.HandlerFunc) echo.HandlerFunc {
+                return func(c echo.Context) error {
+                        c.Response().Header().Add("Alt-Svc", h3Svc)
+                        return next(c)
+                }
+        }
+}