/
middle.go
76 lines (59 loc) · 1.48 KB
/
middle.go
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package telegram
import (
"fmt"
"sync"
"time"
"github.com/9seconds/mtg/conntypes"
"github.com/9seconds/mtg/telegram/api"
"go.uber.org/zap"
)
const middleTelegramBackgroundUpdateEvery = time.Hour
type middleTelegram struct {
baseTelegram
mutex sync.RWMutex
}
func (m *middleTelegram) Secret() []byte {
m.mutex.RLock()
defer m.mutex.RUnlock()
return m.baseTelegram.Secret()
}
func (m *middleTelegram) update() error {
secret, err := api.Secret()
if err != nil {
return fmt.Errorf("cannot fetch secret: %w", err)
}
v4Addresses, v4DefaultDC, err := api.AddressesV4()
if err != nil {
return fmt.Errorf("cannot fetch addresses for ipv4: %w", err)
}
v6Addresses, v6DefaultDC, err := api.AddressesV6()
if err != nil {
return fmt.Errorf("cannot fetch addresses for ipv6: %w", err)
}
m.mutex.Lock()
m.secret = secret
m.v4DefaultDC = v4DefaultDC
m.v6DefaultDC = v6DefaultDC
m.v4Addresses = v4Addresses
m.v6Addresses = v6Addresses
m.mutex.Unlock()
return nil
}
func (m *middleTelegram) backgroundUpdate() {
logger := zap.S().Named("telegram")
for range time.Tick(middleTelegramBackgroundUpdateEvery) {
if err := m.update(); err != nil {
logger.Warnw("Cannot update Telegram proxies", "error", err)
}
}
}
func (m *middleTelegram) Dial(dc conntypes.DC,
protocol conntypes.ConnectionProtocol,
) (conntypes.StreamReadWriteCloser, error) {
if dc == 0 {
dc = conntypes.DCDefaultIdx
}
m.mutex.RLock()
defer m.mutex.RUnlock()
return m.baseTelegram.dial(dc, protocol)
}