func()

in protocol/jsonrpc/json.go [214:263]

• 45 lines of code
• 22 McCabe index (conditional complexity)

func (r *serverRequest) UnmarshalJSON(raw []byte) error {
	r.reset()

	type req *serverRequest
	// Attention: if do not define a new struct named @req, the json.Unmarshal will invoke
	// (*serverRequest)UnmarshalJSON recursively.
	if err := json.Unmarshal(raw, req(r)); err != nil {
		return perrors.New("bad request")
	}

	o := make(map[string]*json.RawMessage)
	if err := json.Unmarshal(raw, &o); err != nil {
		return perrors.New("bad request")
	}
	if o["jsonrpc"] == nil || o["method"] == nil {
		return perrors.New("bad request")
	}
	_, okID := o["id"]
	_, okParams := o["params"]
	if len(o) == 3 && !(okID || okParams) || len(o) == 4 && !(okID && okParams) || len(o) > 4 {
		return perrors.New("bad request")
	}
	if r.Version != Version {
		return perrors.New("bad request")
	}
	if okParams {
		if r.Params == nil || len(*r.Params) == 0 {
			return perrors.New("bad request")
		}
		switch []byte(*r.Params)[0] {
		case '[', '{':
		default:
			return perrors.New("bad request")
		}
	}
	if okID && r.ID == nil {
		r.ID = &null
	}
	if okID {
		if len(*r.ID) == 0 {
			return perrors.New("bad request")
		}
		switch []byte(*r.ID)[0] {
		case 't', 'f', '{', '[':
			return perrors.New("bad request")
		}
	}

	return nil
}