func (self *apnsPushService) singlePush(payload, token []byte, expiry uint32, mid uint32, pool *connpool.Pool) {
conn, err := pool.Get()
if err != nil {
for i := 0; i < 3; i++ {
conn, err = pool.Get()
if err != nil {
self.logChan <- NewInfof("singlePush pool get err:%v token:%v", err, hex.EncodeToString(token))
continue
}
break
}
if err != nil {
clearRequest(self.pushRet, 3, mid, 0)
self.logChan <- NewInfof("Alas helpless... err:%v token:%v", err, hex.EncodeToString(token))
return
}
}
// Total size for each notification:
//
// - command: 1
// - identifier: 4
// - expiry: 4
// - device token length: 2
// - device token: 32 (vary)
// - payload length: 2
// - payload: vary (256 max)
//
// In total, 301 bytes (max)
var dataBuffer [2048]byte
buffer := bytes.NewBuffer(dataBuffer[:0])
// command
binary.Write(buffer, binary.BigEndian, uint8(1))
// transaction id
binary.Write(buffer, binary.BigEndian, mid)
// Expiry
binary.Write(buffer, binary.BigEndian, expiry)
// device token
binary.Write(buffer, binary.BigEndian, uint16(len(token)))
buffer.Write(token)
// payload
binary.Write(buffer, binary.BigEndian, uint16(len(payload)))
buffer.Write(payload)
pdu := buffer.Bytes()
deadline := time.Now().Add(time.Duration(maxWaitTime) * time.Second)
conn.SetWriteDeadline(deadline)
err = writen(conn, pdu)
//self.logChan <- NewInfof("writen token::%v err:%v LocalAddr:%v cid:%v mid:%v pdu:%v", hex.EncodeToString(token), err, conn.LocalAddr(), conn.Id(), mid, len(pdu))
//fmt.Println("writen token:", hex.EncodeToString(token), " err:", err, " LocalAddr:", conn.LocalAddr(), " cid", conn.Id(), " mid:", mid)
sleepTime := time.Duration(maxWaitTime) * time.Second
for nrRetries := 0; err != nil && nrRetries < 3; nrRetries++ {
self.logChan <- NewInfof("error on connection with %v. Will retry within %v %v", err, sleepTime, hex.EncodeToString(token))
conn.Close()
time.Sleep(sleepTime)
// randomly wait more time
sleepTime += time.Duration(rand.Int63n(int64(sleepTime)))
// Let's try another connection to see if we can recover this error
conn, err = pool.Get()
if err != nil {
self.logChan <- NewInfof("We are unable to get a connection: %v", err)
if conn != nil {
conn.Close()
}
return
}
deadline := time.Now().Add(sleepTime)
conn.SetWriteDeadline(deadline)
err = writen(conn, pdu)
}
if err != nil {
clearRequest(self.pushRet, 3, mid, 0)
self.logChan <- NewInfof("token send fail: %v err:%v LocalAddr:%v", hex.EncodeToString(token), err, conn.LocalAddr())
} else {
clearRequest(self.pushRet, 1, mid, conn.Id())
}
conn.SetWriteDeadline(time.Time{})
conn.Close()
}
