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Implement ratelimiting (matrix). Fixes #1238 (#1326)

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Wim 2020-12-06 17:18:25 +01:00 committed by GitHub
parent 8eba2d3e50
commit 2d3c26a4b2
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 169 additions and 51 deletions
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32
bridge/matrix/helpers.go
View File

@ -181,3 +181,35 @@ func (b *Bmatrix) getAvatarURL(sender string) string {
return url
}
// handleRatelimit handles the ratelimit errors and return if we're ratelimited and the amount of time to sleep
func (b *Bmatrix) handleRatelimit(err error) (time.Duration, bool) {
httpErr := handleError(err)
if httpErr.Errcode != "M_LIMIT_EXCEEDED" {
return 0, false
}
b.Log.Debugf("ratelimited: %s", httpErr.Err)
b.Log.Infof("getting ratelimited by matrix, sleeping approx %d seconds before retrying", httpErr.RetryAfterMs/1000)
return time.Duration(httpErr.RetryAfterMs) * time.Millisecond, true
}
// retry function will check if we're ratelimited and retries again when backoff time expired
// returns original error if not 429 ratelimit
func (b *Bmatrix) retry(f func() error) error {
b.rateMutex.Lock()
defer b.rateMutex.Unlock()
for {
if err := f(); err != nil {
if backoff, ok := b.handleRatelimit(err); ok {
time.Sleep(backoff)
} else {
return err
}
} else {
return nil
}
}
}

188
bridge/matrix/matrix.go
View File

@ -30,6 +30,7 @@ type Bmatrix struct {
UserID string
NicknameMap map[string]NicknameCacheEntry
RoomMap map[string]string
rateMutex sync.RWMutex
sync.RWMutex
*bridge.Config
}
@ -99,25 +100,18 @@ func (b *Bmatrix) Disconnect() error {
}
func (b *Bmatrix) JoinChannel(channel config.ChannelInfo) error {
retry:
resp, err := b.mc.JoinRoom(channel.Name, "", nil)
if err != nil {
httpErr := handleError(err)
if httpErr.Errcode == "M_LIMIT_EXCEEDED" {
b.Log.Infof("getting ratelimited by matrix, sleeping approx %d seconds before joining %s", httpErr.RetryAfterMs/1000, channel.Name)
time.Sleep((time.Duration(httpErr.RetryAfterMs) * time.Millisecond))
goto retry
return b.retry(func() error {
resp, err := b.mc.JoinRoom(channel.Name, "", nil)
if err != nil {
return err
}
return err
}
b.Lock()
b.RoomMap[resp.RoomID] = channel.Name
b.Unlock()
b.Lock()
b.RoomMap[resp.RoomID] = channel.Name
b.Unlock()
return nil
return nil
})
}
func (b *Bmatrix) Send(msg config.Message) (string, error) {
@ -135,11 +129,21 @@ func (b *Bmatrix) Send(msg config.Message) (string, error) {
Body: username.plain + msg.Text,
FormattedBody: username.formatted + msg.Text,
}
resp, err := b.mc.SendMessageEvent(channel, "m.room.message", m)
if err != nil {
return "", err
}
return resp.EventID, err
msgID := ""
err := b.retry(func() error {
resp, err := b.mc.SendMessageEvent(channel, "m.room.message", m)
if err != nil {
return err
}
msgID = resp.EventID
return err
})
return msgID, err
}
// Delete message
@ -147,17 +151,34 @@ func (b *Bmatrix) Send(msg config.Message) (string, error) {
if msg.ID == "" {
return "", nil
}
resp, err := b.mc.RedactEvent(channel, msg.ID, &matrix.ReqRedact{})
if err != nil {
return "", err
}
return resp.EventID, err
msgID := ""
err := b.retry(func() error {
resp, err := b.mc.RedactEvent(channel, msg.ID, &matrix.ReqRedact{})
if err != nil {
return err
}
msgID = resp.EventID
return err
})
return msgID, err
}
// Upload a file if it exists
if msg.Extra != nil {
for _, rmsg := range helper.HandleExtra(&msg, b.General) {
if _, err := b.mc.SendText(channel, rmsg.Username+rmsg.Text); err != nil {
rmsg := rmsg
err := b.retry(func() error {
_, err := b.mc.SendText(channel, rmsg.Username+rmsg.Text)
return err
})
if err != nil {
b.Log.Errorf("sendText failed: %s", err)
}
}
@ -187,7 +208,12 @@ func (b *Bmatrix) Send(msg config.Message) (string, error) {
EventID: msg.ID,
Type: "m.replace",
}
_, err := b.mc.SendMessageEvent(channel, "m.room.message", rmsg)
err := b.retry(func() error {
_, err := b.mc.SendMessageEvent(channel, "m.room.message", rmsg)
return err
})
if err != nil {
return "", err
}
@ -202,26 +228,58 @@ func (b *Bmatrix) Send(msg config.Message) (string, error) {
Body: username.plain + msg.Text,
FormattedBody: username.formatted + msg.Text,
}
resp, err := b.mc.SendMessageEvent(channel, "m.room.message", m)
var (
resp *matrix.RespSendEvent
err error
)
err = b.retry(func() error {
resp, err = b.mc.SendMessageEvent(channel, "m.room.message", m)
return err
})
if err != nil {
return "", err
}
return resp.EventID, err
}
if b.GetBool("HTMLDisable") {
resp, err := b.mc.SendText(channel, username.plain+msg.Text)
var (
resp *matrix.RespSendEvent
err error
)
err = b.retry(func() error {
resp, err = b.mc.SendText(channel, username.plain+msg.Text)
return err
})
if err != nil {
return "", err
}
return resp.EventID, err
}
// Post normal message with HTML support (eg riot.im)
resp, err := b.mc.SendFormattedText(channel, username.plain+msg.Text, username.formatted+helper.ParseMarkdown(msg.Text))
var (
resp *matrix.RespSendEvent
err error
)
err = b.retry(func() error {
resp, err = b.mc.SendFormattedText(channel, username.plain+msg.Text,
username.formatted+helper.ParseMarkdown(msg.Text))
return err
})
if err != nil {
return "", err
}
return resp.EventID, err
}
@ -420,13 +478,25 @@ func (b *Bmatrix) handleUploadFile(msg *config.Message, channel string, fi *conf
sp := strings.Split(fi.Name, ".")
mtype := mime.TypeByExtension("." + sp[len(sp)-1])
// image and video uploads send no username, we have to do this ourself here #715
_, err := b.mc.SendFormattedText(channel, username.plain+fi.Comment, username.formatted+fi.Comment)
err := b.retry(func() error {
_, err := b.mc.SendFormattedText(channel, username.plain+fi.Comment, username.formatted+fi.Comment)
return err
})
if err != nil {
b.Log.Errorf("file comment failed: %#v", err)
}
b.Log.Debugf("uploading file: %s %s", fi.Name, mtype)
res, err := b.mc.UploadToContentRepo(content, mtype, int64(len(*fi.Data)))
var res *matrix.RespMediaUpload
err = b.retry(func() error {
res, err = b.mc.UploadToContentRepo(content, mtype, int64(len(*fi.Data)))
return err
})
if err != nil {
b.Log.Errorf("file upload failed: %#v", err)
return
@ -435,40 +505,56 @@ func (b *Bmatrix) handleUploadFile(msg *config.Message, channel string, fi *conf
switch {
case strings.Contains(mtype, "video"):
b.Log.Debugf("sendVideo %s", res.ContentURI)
_, err = b.mc.SendVideo(channel, fi.Name, res.ContentURI)
err = b.retry(func() error {
_, err = b.mc.SendVideo(channel, fi.Name, res.ContentURI)
return err
})
if err != nil {
b.Log.Errorf("sendVideo failed: %#v", err)
}
case strings.Contains(mtype, "image"):
b.Log.Debugf("sendImage %s", res.ContentURI)
_, err = b.mc.SendImage(channel, fi.Name, res.ContentURI)
err = b.retry(func() error {
_, err = b.mc.SendImage(channel, fi.Name, res.ContentURI)
return err
})
if err != nil {
b.Log.Errorf("sendImage failed: %#v", err)
}
case strings.Contains(mtype, "audio"):
b.Log.Debugf("sendAudio %s", res.ContentURI)
_, err = b.mc.SendMessageEvent(channel, "m.room.message", matrix.AudioMessage{
MsgType: "m.audio",
Body: fi.Name,
URL: res.ContentURI,
Info: matrix.AudioInfo{
Mimetype: mtype,
Size: uint(len(*fi.Data)),
},
err = b.retry(func() error {
_, err = b.mc.SendMessageEvent(channel, "m.room.message", matrix.AudioMessage{
MsgType: "m.audio",
Body: fi.Name,
URL: res.ContentURI,
Info: matrix.AudioInfo{
Mimetype: mtype,
Size: uint(len(*fi.Data)),
},
})
return err
})
if err != nil {
b.Log.Errorf("sendAudio failed: %#v", err)
}
default:
b.Log.Debugf("sendFile %s", res.ContentURI)
_, err = b.mc.SendMessageEvent(channel, "m.room.message", matrix.FileMessage{
MsgType: "m.file",
Body: fi.Name,
URL: res.ContentURI,
Info: matrix.FileInfo{
Mimetype: mtype,
Size: uint(len(*fi.Data)),
},
err = b.retry(func() error {
_, err = b.mc.SendMessageEvent(channel, "m.room.message", matrix.FileMessage{
MsgType: "m.file",
Body: fi.Name,
URL: res.ContentURI,
Info: matrix.FileInfo{
Mimetype: mtype,
Size: uint(len(*fi.Data)),
},
})
return err
})
if err != nil {
b.Log.Errorf("sendFile failed: %#v", err)