dapr_api/pubsub/pubsub.go

package pubsub

import (
	"fmt"
	"github.com/go-resty/resty/v2"
	"time"
)

const (
	publishUrlFormat = "http://localhost:%d/v1.0/publish/%s/%s"
)

type API struct {
	port   int
	client *resty.Client
}

func NewAPI(port int, timeout time.Duration) *API {
	return &API{
		client: resty.New().SetTimeout(timeout),
		port:   port,
	}
}

func DestroyAPI(api *API) {
	if api == nil {
		return
	}

	api.port = 0
	api.client = nil
}

func (api *API) Publish(pubsubName string, topic string, data string, queryParams map[string]string) error {
	return api.publish(pubsubName, topic, "test/plain", data, queryParams)
}

func (api *API) PublishJSON(pubsubName string, topic string, data string, queryParams map[string]string) error {
	return api.publish(pubsubName, topic, "application/json", data, queryParams)
}

func (api *API) publish(pubsubName string, topic string, contentType string, data string,
	queryParams map[string]string) error {
	publishUrl := fmt.Sprintf(publishUrlFormat, api.port, pubsubName, topic)

	resp, err := api.client.R().
		SetHeader("Content-Type", contentType).
		SetQueryParams(queryParams).
		SetBody(data).
		Post(publishUrl)
	if err != nil {
		return err
	}

	if resp.IsError() {
		return fmt.Errorf("Status %d: %s\n", resp.StatusCode(), resp.Body())
	}

	return nil
}