export httpx.GetRemoteAddr

rest/httpx/util.go

@@ -0,0 +1,14 @@
+package httpx
+
+import "net/http"
+
+const xForwardFor = "X-Forward-For"
+
+// Returns the peer address, supports X-Forward-For
+func GetRemoteAddr(r *http.Request) string {
+	v := r.Header.Get(xForwardFor)
+	if len(v) > 0 {
+		return v
+	}
+	return r.RemoteAddr
+}

rest/httpx/util_test.go

@@ -0,0 +1,18 @@
+package httpx
+
+import (
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetRemoteAddr(t *testing.T) {
+	host := "8.8.8.8"
+	r, err := http.NewRequest(http.MethodGet, "/", strings.NewReader(""))
+	assert.Nil(t, err)
+
+	r.Header.Set(xForwardFor, host)
+	assert.Equal(t, host, GetRemoteAddr(r))
+}