/
service.go
97 lines (78 loc) · 2.25 KB
/
service.go
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package service
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"github.com/bzon/prometheus-msteams/pkg/card"
"github.com/prometheus/alertmanager/notify/webhook"
"go.opencensus.io/trace"
)
// PostResponse is the prometheus msteams service response.
type PostResponse struct {
WebhookURL string `json:"webhook_url"`
Status int `json:"status"`
Message string `json:"message"`
}
// Service is the Alertmanager to Microsoft Teams webhook service.
type Service interface {
Post(context.Context, webhook.Message) (resp []PostResponse, err error)
}
type simpleService struct {
converter card.Converter
client *http.Client
webhookURL string
}
// NewSimpleService creates a simpleService.
func NewSimpleService(converter card.Converter, client *http.Client, webhookURL string) Service {
return simpleService{converter, client, webhookURL}
}
func (s simpleService) Post(ctx context.Context, wm webhook.Message) ([]PostResponse, error) {
ctx, span := trace.StartSpan(ctx, "simpleService.Post")
defer span.End()
prs := []PostResponse{}
jj, err := s.converter.Convert(ctx, wm)
if err != nil {
return nil, fmt.Errorf("failed to parse webhook message: %w", err)
}
for _, j := range jj {
pr, err := s.post(ctx, j, s.webhookURL)
prs = append(prs, pr)
if err != nil {
return prs, err
}
}
return prs, nil
}
func (s *simpleService) post(ctx context.Context, j map[string]interface{}, url string) (PostResponse, error) {
ctx, span := trace.StartSpan(ctx, "simpleService.post")
defer span.End()
pr := PostResponse{WebhookURL: url}
jb, err := json.Marshal(j)
if err != nil {
err = fmt.Errorf("failed to decoding JSON card: %w", err)
return pr, err
}
req, err := http.NewRequestWithContext(ctx, "POST", s.webhookURL, bytes.NewBuffer(jb))
if err != nil {
err = fmt.Errorf("failed to creating a request: %w", err)
return pr, err
}
resp, err := s.client.Do(req)
if err != nil {
err = fmt.Errorf("http client failed: %w", err)
return pr, err
}
defer resp.Body.Close()
pr.Status = resp.StatusCode
rb, err := ioutil.ReadAll(resp.Body)
if err != nil {
err = fmt.Errorf("failed reading http response body: %w", err)
pr.Message = err.Error()
return pr, err
}
pr.Message = string(rb)
return pr, nil
}