feat(http/mw): request id middleware with context propagation

2026-04-28 15:04:00 +08:00
parent 98c9ce139f
commit 5bd56de013
4 changed files with 89 additions and 0 deletions
@@ -0,0 +1,37 @@
+package middleware
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestRequestID_GeneratesWhenAbsent(t *testing.T) {
+	var seen string
+	h := RequestID(http.HandlerFunc(func(_ http.ResponseWriter, r *http.Request) {
+		seen = RequestIDFromContext(r.Context())
+	}))
+
+	rec := httptest.NewRecorder()
+	h.ServeHTTP(rec, httptest.NewRequest("GET", "/", nil))
+	require.NotEmpty(t, seen)
+	require.Equal(t, seen, rec.Header().Get("X-Request-ID"))
+}
+
+func TestRequestID_PreservesClientHeader(t *testing.T) {
+	const given = "client-supplied-id"
+	var seen string
+	h := RequestID(http.HandlerFunc(func(_ http.ResponseWriter, r *http.Request) {
+		seen = RequestIDFromContext(r.Context())
+	}))
+
+	req := httptest.NewRequest("GET", "/", nil)
+	req.Header.Set("X-Client-Request-ID", given)
+
+	rec := httptest.NewRecorder()
+	h.ServeHTTP(rec, req)
+	require.Equal(t, given, seen)
+	require.Equal(t, given, rec.Header().Get("X-Request-ID"))
+}