()
| 357 | } |
| 358 | |
| 359 | func (sm *StreamManager) prepareNextPacket() (done bool, pkt *wshrpc.CommandStreamData, sender DataSender) { |
| 360 | sm.lock.Lock() |
| 361 | defer sm.lock.Unlock() |
| 362 | |
| 363 | available := sm.buf.Size() |
| 364 | |
| 365 | if sm.closed || sm.terminalEventAcked { |
| 366 | return true, nil, nil |
| 367 | } |
| 368 | |
| 369 | if !sm.connected { |
| 370 | sm.drainCond.Wait() |
| 371 | return false, nil, nil |
| 372 | } |
| 373 | |
| 374 | if available == 0 { |
| 375 | if sm.terminalEvent != nil && !sm.terminalEventSent { |
| 376 | return false, sm.prepareTerminalPacket(), sm.dataSender |
| 377 | } |
| 378 | sm.drainCond.Wait() |
| 379 | return false, nil, nil |
| 380 | } |
| 381 | |
| 382 | effectiveRwnd := sm.rwndSize |
| 383 | if sm.cwndSize < effectiveRwnd { |
| 384 | effectiveRwnd = sm.cwndSize |
| 385 | } |
| 386 | availableToSend := int64(effectiveRwnd) - sm.sentNotAcked |
| 387 | |
| 388 | if availableToSend <= 0 { |
| 389 | sm.drainCond.Wait() |
| 390 | return false, nil, nil |
| 391 | } |
| 392 | |
| 393 | peekSize := int(availableToSend) |
| 394 | if peekSize > MaxPacketSize { |
| 395 | peekSize = MaxPacketSize |
| 396 | } |
| 397 | if peekSize > available { |
| 398 | peekSize = available |
| 399 | } |
| 400 | |
| 401 | data := make([]byte, peekSize) |
| 402 | n := sm.buf.PeekDataAt(int(sm.sentNotAcked), data) |
| 403 | if n == 0 { |
| 404 | sm.drainCond.Wait() |
| 405 | return false, nil, nil |
| 406 | } |
| 407 | data = data[:n] |
| 408 | |
| 409 | seq := sm.buf.HeadPos() + sm.sentNotAcked |
| 410 | sm.sentNotAcked += int64(n) |
| 411 | |
| 412 | return false, &wshrpc.CommandStreamData{ |
| 413 | Id: sm.streamId, |
| 414 | Seq: seq, |
| 415 | Data64: base64.StdEncoding.EncodeToString(data), |
| 416 | }, sm.dataSender |
no test coverage detected