API events: fix parsing error

Fix an error where an absent "filters" parameter led to JSON parsing errors. Fixes: containers#7078 Signed-off-by: Valentin Rothberg <[email protected]>
vrothberg · Jul 27, 2020 · 5ee35ca · 5ee35ca
1 parent 11e8e65
commit 5ee35ca
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/pkg/api/handlers/compat/events.go b/pkg/api/handlers/compat/events.go
@@ -29,8 +29,14 @@ func filtersFromRequest(r *http.Request) ([]string, error) {
 		compatFilters map[string]map[string]bool
 		filters       map[string][]string
 		libpodFilters []string
+		raw           []byte
 	)
-	raw := []byte(r.Form.Get("filters"))
+
+	if _, found := r.URL.Query()["filters"]; found {
+		raw = []byte(r.Form.Get("filters"))
+	} else {
+		return []string{}, nil
+	}
 
 	// Backwards compat with older versions of Docker.
 	if err := json.Unmarshal(raw, &compatFilters); err == nil {