func unpackRequestBody()

in request.go [271:342]
62 lines of code
13 McCabe index (conditional complexity)

func unpackRequestBody(decoder *Decoder, reqObj interface{}) error {
	if decoder == nil {
		return perrors.Errorf("@decoder is nil")
	}

	req, ok := reqObj.([]interface{})
	if !ok {
		return perrors.Errorf("@reqObj is not of type: []interface{}")
	}
	if len(req) < 7 {
		return perrors.New("length of @reqObj should  be 7")
	}

	var (
		err                                                     error
		dubboVersion, target, serviceVersion, method, argsTypes interface{}
		args                                                    []interface{}
	)

	dubboVersion, err = decoder.Decode()
	if err != nil {
		return perrors.WithStack(err)
	}
	req[0] = dubboVersion

	target, err = decoder.Decode()
	if err != nil {
		return perrors.WithStack(err)
	}
	req[1] = target

	serviceVersion, err = decoder.Decode()
	if err != nil {
		return perrors.WithStack(err)
	}
	req[2] = serviceVersion

	method, err = decoder.Decode()
	if err != nil {
		return perrors.WithStack(err)
	}
	req[3] = method

	argsTypes, err = decoder.Decode()
	if err != nil {
		return perrors.WithStack(err)
	}
	req[4] = argsTypes

	ats := DescRegex.FindAllString(argsTypes.(string), -1)
	var arg interface{}
	for i := 0; i < len(ats); i++ {
		arg, err = decoder.Decode()
		if err != nil {
			return perrors.WithStack(err)
		}
		args = append(args, arg)
	}
	req[5] = args

	attachments, err := decoder.Decode()
	if err != nil {
		return perrors.WithStack(err)
	}
	if v, ok := attachments.(map[interface{}]interface{}); ok {
		v[DUBBO_VERSION_KEY] = dubboVersion
		req[6] = ToMapStringString(v)
		return nil
	}

	return perrors.Errorf("get wrong attachments: %+v", attachments)
}