Do not decode JSON from body if no POST params are spec.

pkg/codegen/assets/rest_request.go.tpl

@@ -28,6 +28,10 @@ var (
     _ = chi.URLParam
     _ = multipart.ErrMessageTooLarge
     _ = payload.ParseUint64s
+    _ = strings.ToLower
+    _ = io.EOF
+    _ = fmt.Errorf
+    _ = json.NewEncoder
 )
 
 type (
@@ -72,6 +76,7 @@ func (r {{ export $.Endpoint.Entrypoint $a.Name }}) Get{{ export $p.Name }}() {{
 
 // Fill processes request and fills internal variables
 func (r *{{ export $.Endpoint.Entrypoint $a.Name }}) Fill(req *http.Request) (err error) {
+    {{ if $a.Params.Post }}
 	if strings.ToLower(req.Header.Get("content-type")) == "application/json" {
 		err = json.NewDecoder(req.Body).Decode(r)
 
@@ -82,6 +87,7 @@ func (r *{{ export $.Endpoint.Entrypoint $a.Name }}) Fill(req *http.Request) (er
 			return fmt.Errorf("error parsing http request body: %w", err)
 		}
 	}
+    {{- end }}
 
 
     {{ if $a.Params.Get }}