mirror of
https://github.com/binwiederhier/ntfy.git
synced 2024-11-05 03:14:16 +01:00
113 lines
3.1 KiB
Go
113 lines
3.1 KiB
Go
package server
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
firebase "firebase.google.com/go"
|
|
"firebase.google.com/go/messaging"
|
|
"fmt"
|
|
"google.golang.org/api/option"
|
|
"heckel.io/ntfy/auth"
|
|
"strings"
|
|
)
|
|
|
|
const (
|
|
fcmMessageLimit = 4000
|
|
)
|
|
|
|
// maybeTruncateFCMMessage performs best-effort truncation of FCM messages.
|
|
// The docs say the limit is 4000 characters, but during testing it wasn't quite clear
|
|
// what fields matter; so we're just capping the serialized JSON to 4000 bytes.
|
|
func maybeTruncateFCMMessage(m *messaging.Message) *messaging.Message {
|
|
s, err := json.Marshal(m)
|
|
if err != nil {
|
|
return m
|
|
}
|
|
if len(s) > fcmMessageLimit {
|
|
over := len(s) - fcmMessageLimit + 16 // = len("truncated":"1",), sigh ...
|
|
message, ok := m.Data["message"]
|
|
if ok && len(message) > over {
|
|
m.Data["truncated"] = "1"
|
|
m.Data["message"] = message[:len(message)-over]
|
|
}
|
|
}
|
|
return m
|
|
}
|
|
|
|
func createFirebaseSubscriber(credentialsFile string, auther auth.Auther) (subscriber, error) {
|
|
fb, err := firebase.NewApp(context.Background(), nil, option.WithCredentialsFile(credentialsFile))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
msg, err := fb.Messaging(context.Background())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return func(m *message) error {
|
|
fbm, err := toFirebaseMessage(m, auther)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, err = msg.Send(context.Background(), fbm)
|
|
return err
|
|
}, nil
|
|
}
|
|
|
|
func toFirebaseMessage(m *message, auther auth.Auther) (*messaging.Message, error) {
|
|
var data map[string]string // Mostly matches https://ntfy.sh/docs/subscribe/api/#json-message-format
|
|
switch m.Event {
|
|
case keepaliveEvent, openEvent:
|
|
data = map[string]string{
|
|
"id": m.ID,
|
|
"time": fmt.Sprintf("%d", m.Time),
|
|
"event": m.Event,
|
|
"topic": m.Topic,
|
|
}
|
|
case messageEvent:
|
|
allowForward := true
|
|
if auther != nil {
|
|
allowForward = auther.Authorize(nil, m.Topic, auth.PermissionRead) == nil
|
|
}
|
|
if allowForward {
|
|
data = map[string]string{
|
|
"id": m.ID,
|
|
"time": fmt.Sprintf("%d", m.Time),
|
|
"event": m.Event,
|
|
"topic": m.Topic,
|
|
"priority": fmt.Sprintf("%d", m.Priority),
|
|
"tags": strings.Join(m.Tags, ","),
|
|
"click": m.Click,
|
|
"title": m.Title,
|
|
"message": m.Message,
|
|
"encoding": m.Encoding,
|
|
}
|
|
if m.Attachment != nil {
|
|
data["attachment_name"] = m.Attachment.Name
|
|
data["attachment_type"] = m.Attachment.Type
|
|
data["attachment_size"] = fmt.Sprintf("%d", m.Attachment.Size)
|
|
data["attachment_expires"] = fmt.Sprintf("%d", m.Attachment.Expires)
|
|
data["attachment_url"] = m.Attachment.URL
|
|
}
|
|
} else {
|
|
// If anonymous read for a topic is not allowed, we cannot send the message along
|
|
// via Firebase. Instead, we send a "poll_request" message, asking the client to poll.
|
|
data = map[string]string{
|
|
"id": m.ID,
|
|
"time": fmt.Sprintf("%d", m.Time),
|
|
"event": pollRequestEvent,
|
|
"topic": m.Topic,
|
|
}
|
|
}
|
|
}
|
|
var androidConfig *messaging.AndroidConfig
|
|
if m.Priority >= 4 {
|
|
androidConfig = &messaging.AndroidConfig{
|
|
Priority: "high",
|
|
}
|
|
}
|
|
return maybeTruncateFCMMessage(&messaging.Message{
|
|
Topic: m.Topic,
|
|
Data: data,
|
|
Android: androidConfig,
|
|
}), nil
|
|
}
|