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watchtower/pkg/notifications/gotify.go

118 lines
3.0 KiB
Go

package notifications
import (
"bytes"
"crypto/tls"
"encoding/json"
"fmt"
"net/http"
"strings"
t "github.com/containrrr/watchtower/pkg/types"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
const (
gotifyType = "gotify"
)
type gotifyTypeNotifier struct {
gotifyURL string
gotifyAppToken string
gotifyInsecureSkipVerify bool
logLevels []log.Level
}
func newGotifyNotifier(c *cobra.Command, acceptedLogLevels []log.Level) t.Notifier {
flags := c.PersistentFlags()
gotifyURL, _ := flags.GetString("notification-gotify-url")
if len(gotifyURL) < 1 {
log.Fatal("Required argument --notification-gotify-url(cli) or WATCHTOWER_NOTIFICATION_GOTIFY_URL(env) is empty.")
} else if !(strings.HasPrefix(gotifyURL, "http://") || strings.HasPrefix(gotifyURL, "https://")) {
log.Fatal("Gotify URL must start with \"http://\" or \"https://\"")
} else if strings.HasPrefix(gotifyURL, "http://") {
log.Warn("Using an HTTP url for Gotify is insecure")
}
gotifyToken, _ := flags.GetString("notification-gotify-token")
if len(gotifyToken) < 1 {
log.Fatal("Required argument --notification-gotify-token(cli) or WATCHTOWER_NOTIFICATION_GOTIFY_TOKEN(env) is empty.")
}
gotifyInsecureSkipVerify, _ := flags.GetBool("notification-gotify-tls-skip-verify")
n := &gotifyTypeNotifier{
gotifyURL: gotifyURL,
gotifyAppToken: gotifyToken,
gotifyInsecureSkipVerify: gotifyInsecureSkipVerify,
logLevels: acceptedLogLevels,
}
log.AddHook(n)
return n
}
func (n *gotifyTypeNotifier) StartNotification() {}
func (n *gotifyTypeNotifier) SendNotification() {}
func (n *gotifyTypeNotifier) Close() {}
func (n *gotifyTypeNotifier) Levels() []log.Level {
return n.logLevels
}
func (n *gotifyTypeNotifier) getURL() string {
url := n.gotifyURL
if !strings.HasSuffix(url, "/") {
url += "/"
}
return url + "message?token=" + n.gotifyAppToken
}
func (n *gotifyTypeNotifier) Fire(entry *log.Entry) error {
go func() {
jsonBody, err := json.Marshal(gotifyMessage{
Message: "(" + entry.Level.String() + "): " + entry.Message,
Title: "Watchtower",
Priority: 0,
})
if err != nil {
fmt.Println("Failed to create JSON body for Gotify notification: ", err)
return
}
// Explicitly define the client so we can set InsecureSkipVerify to the desired value.
client := &http.Client{
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: n.gotifyInsecureSkipVerify,
},
},
}
jsonBodyBuffer := bytes.NewBuffer([]byte(jsonBody))
resp, err := client.Post(n.getURL(), "application/json", jsonBodyBuffer)
if err != nil {
fmt.Println("Failed to send Gotify notification: ", err)
return
}
defer resp.Body.Close()
if resp.StatusCode < 200 || resp.StatusCode >= 300 {
fmt.Printf("Gotify notification returned %d HTTP status code", resp.StatusCode)
}
}()
return nil
}
type gotifyMessage struct {
Message string `json:"message"`
Title string `json:"title"`
Priority int `json:"priority"`
}