B4X

Send BinData Contents over a Socket

Demonstrates Socket.SendBd, which sends bytes from a BinData beginning at an offset. A numBytes of 0 sends from the offset through the end of the data.

Background. The BinData receive methods accumulate raw bytes in a BinData object. A single receive returns only what is currently available, whereas the counted receive waits for an exact number of bytes.

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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


'  Place some bytes into a BinData to be sent.
Dim bd As ChilkatBinData
bd.Initialize
bd.AppendString("message payload", "utf-8")

'  Send bytes from the BinData starting at the given offset.  A numBytes of 0 sends from the offset
'  through the end of the data.
success = socket.SendBd(bd, 0, 0)
If success = False Then
    Log(socket.LastErrorText)
    Return
End If

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