matrix-prometheus/internal/webhook/handle.go

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2023-01-13 21:24:39 +01:00
package webhook
import (
"bytes"
"encoding/json"
"log"
"net/http"
"maunium.net/go/mautrix/event"
)
const (
messageTemplate = `@room Alerts for group "{{ .GroupKey }}":{{ range .Alerts }}
* {{ .Annotations.Description }}{{ end }}`
)
func (s Server) handleWebhook(w http.ResponseWriter, r *http.Request) {
if r.Header.Get("Content-Type") != "application/json" {
writeStatus(w, http.StatusBadRequest)
return
}
decoder := json.NewDecoder(r.Body)
var payload Payload
err := decoder.Decode(&payload)
if err != nil {
writeStatus(w, http.StatusBadRequest)
return
}
if payload.Version != "4" {
writeStatus(w, http.StatusBadRequest)
return
}
if payload.Status != StatusFiring {
writeStatus(w, http.StatusOK)
return
}
var message bytes.Buffer
err = s.tmpl.Execute(&message, payload)
if err != nil {
log.Print(err)
writeStatus(w, http.StatusInternalServerError)
return
}
evt := event.MessageEventContent{
MsgType: event.MsgText,
Body: message.String(),
}
success := s.matrix.Broadcast(&evt)
if !success {
writeStatus(w, http.StatusInternalServerError)
}
}