Beispiel #1
0
// WriteResponseObject writes the status code and response object to the HttpResponseWriter in
// the specified context, in the format best suited based on the request.
//
// Goweb uses the WebCodecService to decide which codec to use when responding
// see http://godoc.org/github.com/stretchr/codecs/services#WebCodecService for more information.
//
// This method should be used when the Goweb Standard Response Object does not satisfy the needs of
// the API, but other Respond* methods are recommended.
func (a *GowebAPIResponder) WriteResponseObject(ctx context.Context, status int, responseObject interface{}) error {

	service := a.GetCodecService()

	acceptHeader := ctx.HttpRequest().Header.Get("Accept")
	extension := ctx.FileExtension()
	hasCallback := len(ctx.QueryValue(CallbackParameter)) > 0

	codec, codecError := service.GetCodecForResponding(acceptHeader, extension, hasCallback)

	if codecError != nil {
		return codecError
	}

	options := ctx.CodecOptions()

	// do we need to add some options?
	if _, exists := options[constants.OptionKeyClientCallback]; hasCallback && !exists {
		options[constants.OptionKeyClientCallback] = ctx.QueryValue(CallbackParameter)
	}

	output, marshalErr := service.MarshalWithCodec(codec, responseObject, options)

	if marshalErr != nil {
		return marshalErr
	}

	// use the HTTP responder to respond
	ctx.HttpResponseWriter().Header().Set("Content-Type", codec.ContentType()) // TODO: test me
	a.httpResponder.With(ctx, status, output)

	return nil

}
Beispiel #2
0
// Responds to the Context with the specified status, data and errors.
func (a *GowebAPIResponder) Respond(ctx context.Context, status int, data interface{}, errors []string) error {

	if data != nil {

		var dataErr error
		data, dataErr = codecs.PublicData(data, nil)

		if dataErr != nil {
			return dataErr
		}

	}

	// make the standard response object
	if (a.AlwaysEnvelopResponse && ctx.QueryValue("envelop") != "false") || ctx.QueryValue("envelop") == "true" {
		sro := map[string]interface{}{
			a.StandardFieldStatusKey: status,
		}

		if data != nil {
			sro[a.StandardFieldDataKey] = data
		}

		if len(errors) > 0 {
			sro[a.StandardFieldErrorsKey] = errors
		}

		data = sro
	}

	// transform the object
	var transformErr error
	data, transformErr = a.TransformStandardResponseObject(ctx, data)

	if transformErr != nil {
		return transformErr
	}

	return a.WriteResponseObject(ctx, status, data)

}