Fix regression in stats API endpoint where stream query param default is true

Signed-off-by: Antonio Murdaca <me@runcom.ninja>

api/server/form.go

@@ -11,6 +11,15 @@ func boolValue(r *http.Request, k string) bool {
 	return !(s == "" || s == "0" || s == "no" || s == "false" || s == "none")
 }
 
+// boolValueOrDefault returns the default bool passed if the query param is
+// missing, otherwise it's just a proxy to boolValue above
+func boolValueOrDefault(r *http.Request, k string, d bool) bool {
+	if _, ok := r.Form[k]; !ok {
+		return d
+	}
+	return boolValue(r, k)
+}
+
 func int64ValueOrZero(r *http.Request, k string) int64 {
 	val, err := strconv.ParseInt(r.FormValue(k), 10, 64)
 	if err != nil {

api/server/form_test.go

@@ -33,6 +33,21 @@ func TestBoolValue(t *testing.T) {
 	}
 }
 
+func TestBoolValueOrDefault(t *testing.T) {
+	r, _ := http.NewRequest("GET", "", nil)
+	if !boolValueOrDefault(r, "queryparam", true) {
+		t.Fatal("Expected to get true default value, got false")
+	}
+
+	v := url.Values{}
+	v.Set("param", "")
+	r, _ = http.NewRequest("GET", "", nil)
+	r.Form = v
+	if boolValueOrDefault(r, "param", true) {
+		t.Fatal("Expected not to get true")
+	}
+}
+
 func TestInt64ValueOrZero(t *testing.T) {
 	cases := map[string]int64{
 		"":     0,

api/server/server.go

@@ -551,7 +551,7 @@ func (s *Server) getContainersStats(version version.Version, w http.ResponseWrit
 		return fmt.Errorf("Missing parameter")
 	}
 
-	return s.daemon.ContainerStats(vars["name"], boolValue(r, "stream"), ioutils.NewWriteFlusher(w))
+	return s.daemon.ContainerStats(vars["name"], boolValueOrDefault(r, "stream", true), ioutils.NewWriteFlusher(w))
 }
 
 func (s *Server) getContainersLogs(version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {