func SerializeResponseMiddleware(registry kit.Registry, request kit.Request, response kit.Response) (kit.Response, bool) {
// Try to serialize the reponse data.
// Determine serializer.
serializer := registry.DefaultSerializer()
// Check if a custom serializer was specified.
if name := request.GetContext().String("response-serializer"); name != "" {
serializer = registry.Serializer(name)
if serializer == nil {
errResp := kit.NewErrorResponse("unknown_response_serializer", true)
data, _ := serializer.MustSerializeResponse(errResp)
errResp.SetData(data)
return errResp, false
}
}
// Set format in metadata.
meta := response.GetMeta()
if meta == nil {
meta = make(map[string]interface{})
}
meta["format"] = serializer.Name()
response.SetMeta(meta)
data, err := serializer.MustSerializeResponse(response)
if err != nil {
registry.Logger().Errorf("Response serialization error: %v (%+v)", err, response)
}
response.SetData(data)
return nil, false
}
func UnserializeRequestMiddleware(registry kit.Registry, request kit.Request) (kit.Response, bool) {
// Try to parse json in body. Ignore error since body might not contain json.
contentType := request.GetHttpRequest().Header.Get("Content-Type")
if strings.Contains(contentType, "json") {
// Only read the HTTP body automatically for json content type requests,
// since some handlers might need to read it themselfes (see the files package resource).
if err := request.ReadHttpBody(); err != nil {
return kit.NewErrorResponse(err, "http_body_read_error"), false
} else {
if request.GetRawData() != nil {
if err := request.ParseJsonData(); err != nil {
return kit.NewErrorResponse(err, "invalid_json_body", true), false
}
if request.GetData() != nil {
// Successfully parsed json body.
// Now try to unserialize.
// Determine serializer.
serializer := registry.DefaultSerializer()
// Check if a custom serializer was specified.
if name := request.GetContext().String("request-serializer"); name != "" {
serializer = registry.Serializer(name)
}
if serializer == nil {
return kit.NewErrorResponse("unknown_serializer", fmt.Sprintf("The specified request serializer does not exist")), false
} else {
if err := request.Unserialize(serializer); err != nil {
return kit.NewErrorResponse(err, "request_unserialize_error", true), false
}
}
}
}
}
}
return nil, false
}
func UnserializerMiddleware(registry kit.Registry, request kit.Request) (kit.Response, bool) {
serializer := registry.DefaultSerializer()
// Try to find custom serializer.
data, ok := request.GetData().(map[string]interface{})
if ok {
name, ok := data["request_serializer"].(string)
if ok {
s := registry.Serializer(name)
if s == nil {
resp := kit.NewErrorResponse("unknown_request_serializer", fmt.Sprintf("The given request serializer %v does not exist", name))
return resp, false
} else {
serializer = s
}
}
}
if err := serializer.UnserializeRequest(request.GetData(), request); err != nil {
return kit.NewErrorResponse(err), false
}
return nil, false
}