func (self *apnsPushService) singlePush(req *pushRequest, pool *connpool.Pool, mid uint32, token []byte) {
conn, err := pool.Get()
if err != nil {
req.errChan <- err
return
}
defer conn.Close()
// 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
payload := req.payload
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, req.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()
err = writen(conn, pdu)
if err != nil {
req.errChan <- err
return
}
}
func (self *apnsPushService) singlePush(payload, token []byte, expiry uint32, mid uint32, pool *connpool.Pool, errChan chan<- error) {
conn, err := pool.Get()
if err != nil {
errChan <- err
return
}
// Total size for each notification:
//
// - command: 1
// - identifier: 4
// - expiry: 4
// - device token length: 2
// - device token: variable (100 max) - apple announced that we might have 100-byte device tokens in the future, in WWDC 2015. Previously 32.
// - payload length: 2
// - payload: variable (2048 max)
//
// In total, 2161 bytes (max)
var dataBuffer [2180]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)
sleepTime := time.Duration(maxWaitTime) * time.Second
for nrRetries := 0; err != nil && nrRetries < 3; nrRetries++ {
errChan <- fmt.Errorf("error on connection with %v: %v. Will retry within %v", conn.RemoteAddr(), err, sleepTime)
errChan = self.errChan
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 {
// The pool may return nil for conn.
if conn != nil {
conn.Close()
}
errChan <- fmt.Errorf("We are unable to get a connection: %v", err)
return
}
deadline := time.Now().Add(sleepTime)
conn.SetWriteDeadline(deadline)
err = writen(conn, pdu)
}
conn.SetWriteDeadline(time.Time{})
conn.Close()
}
func (self *apnsPushService) singlePush(payload, token []byte, expiry uint32, mid uint32, pool *connpool.Pool, errChan chan<- error) {
conn, err := pool.Get()
if err != nil {
errChan <- err
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)
sleepTime := time.Duration(maxWaitTime) * time.Second
for nrRetries := 0; err != nil && nrRetries < 3; nrRetries++ {
errChan <- fmt.Errorf("error on connection with %v: %v. Will retry within %v", conn.RemoteAddr(), err, sleepTime)
errChan = self.errChan
conn.Close()
time.Sleep(sleepTime)
sleepTime = sleepTime * 2
// Let's try another connection to see if we can recover this error
conn, err = pool.Get()
if err != nil {
errChan <- fmt.Errorf("We are unable to get a connection: %v", err)
conn.Close()
return
}
deadline := time.Now().Add(sleepTime)
conn.SetWriteDeadline(deadline)
err = writen(conn, pdu)
}
conn.SetWriteDeadline(time.Time{})
conn.Close()
}