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91 lines
2.0 KiB
Go
91 lines
2.0 KiB
Go
package notifications
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import (
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"fmt"
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"github.com/containrrr/shoutrrr"
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t "github.com/containrrr/watchtower/pkg/types"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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)
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const (
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shoutrrrType = "shoutrrr"
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)
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// Implements Notifier, logrus.Hook
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type shoutrrrTypeNotifier struct {
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Urls []string
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entries []*log.Entry
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logLevels []log.Level
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}
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func newShoutrrrNotifier(c *cobra.Command, acceptedLogLevels []log.Level) t.Notifier {
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flags := c.PersistentFlags()
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urls, _ := flags.GetStringArray("notification-url")
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n := &shoutrrrTypeNotifier{
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Urls: urls,
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logLevels: acceptedLogLevels,
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}
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log.AddHook(n)
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return n
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}
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func (e *shoutrrrTypeNotifier) buildMessage(entries []*log.Entry) string {
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body := ""
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for _, entry := range entries {
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body += entry.Time.Format("2006-01-02 15:04:05") + " (" + entry.Level.String() + "): " + entry.Message + "\r\n"
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// We don't use fields in watchtower, so don't bother sending them.
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}
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return body
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}
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func (e *shoutrrrTypeNotifier) sendEntries(entries []*log.Entry) {
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// Do the sending in a separate goroutine so we don't block the main process.
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msg := e.buildMessage(entries)
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go func() {
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router, _ := shoutrrr.CreateSender(e.Urls...)
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errs := router.Send(msg, nil)
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for i, err := range errs {
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if err != nil {
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// Use fmt so it doesn't trigger another notification.
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fmt.Println("Failed to send notification via shoutrrr (url="+e.Urls[i]+"): ", err)
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}
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}
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}()
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}
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func (e *shoutrrrTypeNotifier) StartNotification() {
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if e.entries == nil {
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e.entries = make([]*log.Entry, 0, 10)
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}
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}
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func (e *shoutrrrTypeNotifier) SendNotification() {
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if e.entries == nil || len(e.entries) <= 0 {
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return
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}
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e.sendEntries(e.entries)
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e.entries = nil
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}
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func (e *shoutrrrTypeNotifier) Levels() []log.Level {
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return e.logLevels
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}
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func (e *shoutrrrTypeNotifier) Fire(entry *log.Entry) error {
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if e.entries != nil {
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e.entries = append(e.entries, entry)
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} else {
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// Log output generated outside a cycle is sent immediately.
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e.sendEntries([]*log.Entry{entry})
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}
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return nil
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}
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