(goctl)fix: api timeout limited during api generation (#4513)

tools/goctl/api/gogen/genroutes.go

@@ -139,12 +139,7 @@ rest.WithPrefix("%s"),`, g.prefix)
 				return err
 			}
 
-			// why we check this, maybe some users set value 1, it's 1ns, not 1s.
-			if duration < timeoutThreshold {
-				return fmt.Errorf("timeout should not less than 1ms, now %v", duration)
-			}
-
-			timeout = fmt.Sprintf("\n rest.WithTimeout(%d * time.Millisecond),", duration.Milliseconds())
+			timeout = fmt.Sprintf("\n rest.WithTimeout(%s),", formatDuration(duration))
 			hasTimeout = true
 		}
 
@@ -211,6 +206,16 @@ rest.WithPrefix("%s"),`, g.prefix)
 	})
 }
 
+func formatDuration(duration time.Duration) string {
+	if duration < time.Microsecond {
+		return fmt.Sprintf("%d * time.Nanosecond", duration.Nanoseconds())
+	}
+	if duration < time.Millisecond {
+		return fmt.Sprintf("%d * time.Microsecond", duration.Microseconds())
+	}
+	return fmt.Sprintf("%d * time.Millisecond", duration.Milliseconds())
+}
+
 func genRouteImports(parentPkg string, api *spec.ApiSpec) string {
 	importSet := collection.NewSet()
 	importSet.AddStr(fmt.Sprintf("\"%s\"", pathx.JoinPackages(parentPkg, contextDir)))

tools/goctl/api/gogen/genroutes_test.go

@@ -0,0 +1,27 @@
+package gogen
+
+import (
+	"testing"
+	"time"
+)
+
+func Test_formatDuration(t *testing.T) {
+	tests := []struct {
+		duration time.Duration
+		expected string
+	}{
+		{0, "0 * time.Nanosecond"},
+		{time.Nanosecond, "1 * time.Nanosecond"},
+		{100 * time.Nanosecond, "100 * time.Nanosecond"},
+		{500 * time.Microsecond, "500 * time.Microsecond"},
+		{2 * time.Millisecond, "2 * time.Millisecond"},
+		{time.Second, "1000 * time.Millisecond"},
+	}
+
+	for _, test := range tests {
+		result := formatDuration(test.duration)
+		if result != test.expected {
+			t.Errorf("formatDuration(%v) = %v; want %v", test.duration, result, test.expected)
+		}
+	}
+}