Support Go 1.12 for http.SameSiteNoneMode

Author: lammel

middleware/csrf_samesite.go

@@ -0,0 +1,12 @@
+// +build !go1.12
+
+package middleware
+
+import (
+	"net/http"
+)
+
+const (
+	// SameSiteNoneMode required to be redefined for Go 1.12 support (see #1524)
+	SameSiteNoneMode http.SameSite = http.SameSiteNoneMode
+)

middleware/csrf_samesite_1.12.go

@@ -0,0 +1,12 @@
+// +build go1.12
+
+package middleware
+
+import (
+	"net/http"
+)
+
+const (
+	// SameSiteNoneMode required to be redefined for Go 1.12 support (see #1524)
+	SameSiteNoneMode http.SameSite = 4
+)

middleware/csrf_test.go

@@ -146,7 +146,7 @@ func TestCSRFWithSameSiteModeNone(t *testing.T) {
 	c := e.NewContext(req, rec)
 
 	csrf := CSRFWithConfig(CSRFConfig{
-		CookieSameSite: http.SameSiteNoneMode,
+		CookieSameSite: SameSiteNoneMode,
 	})
 
 	h := csrf(func(c echo.Context) error {