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B4X

Receive an Exact Number of Bytes into a BinData

See more Socket/SSL/TLS Examples

Demonstrates Socket.ReceiveBdN, which receives exactly the requested number of bytes and appends them to a BinData, continuing until the full count is satisfied.

Background. Inactivity is controlled by MaxReadIdleMs: the call fails if incoming bytes halt for longer than MaxReadIdleMs milliseconds before the full amount is received. A single receive returns only what is currently available, whereas this counted receive waits for an exact number of bytes.

Chilkat B4X Downloads

B4X
Dim success As Boolean = False

Dim socket As ChilkatSocket
socket.Initialize("socket")

'  Connect to the server using TLS.
Dim bTls As Boolean = True
Dim maxWaitMs As Int = 5000
success = socket.Connect("example.com", 5000, bTls, maxWaitMs)
If success = False Then
    Log(socket.LastErrorText)
    Return
End If


'  MaxReadIdleMs controls the inactivity limit for receiving.  The ReceiveBdN call will fail if
'  incoming bytes halt for longer than this many milliseconds before the full amount is received.
socket.MaxReadIdleMs = 15000

'  Receive exactly the requested number of bytes, appending them to a BinData.  The method continues
'  receiving until the full count is satisfied or a failure occurs.
Dim bd As ChilkatBinData
bd.Initialize
success = socket.ReceiveBdN(256, bd)
If success = False Then
    Log(socket.LastErrorText)
    Return
End If

Log("Received " & bd.NumBytes & " bytes.")