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(PowerShell) Transfer a File using Sockets (TLS or non-TLS)Demonstrates how to two programs, one a socket writer and the other a socket reader, can transfer a file. The connection can be TLS or a regular non-encrypted TCP connection.
[Reflection.Assembly]::LoadFile("C:\myAssemblies\ChilkatDotNet2.dll") # This example assumes the Chilkat Socket API to have been previously unlocked. # See Socket Unlock Sample for sample code. # On the sending side, we'll load the file into a BinData object and send. # On the receiving side, we'll read from the socket connection into a BinData, and save to a file. # This example assumes the file is not crazy-large, and that the entire contents # can fit into memory. # (If the file is too large for memory, there are other ways to send. It just involves streaming or # sending the file chunk-by-chunk..) # This section of code is for the sender. $bdToSend = New-Object Chilkat.BinData $success = $bdToSend.LoadFile("somePath/someFile.dat") # Assume success for the example... $sndSock = New-Object Chilkat.Socket $bUseTls = $true $port = 5555 $maxWaitMs = 5000 $success = $sndSock.Connect("some_domain_or_ip.com",$port,$bUseTls,$maxWaitMs) # Assume success for the example... # Tell the receiver how many bytes are coming. $numBytes = $bdToSend.NumBytes $bBigEndian = $true $success = $sndSock.SendInt32($numBytes,$bBigEndian) # Send the file data (sends the entire contents of bdToSend). $success = $sndSock.SendBd($bdToSend,0,0) # Get an acknowledgement. $success = $sndSock.ReceiveInt32($bBigEndian) if ($success -ne $true) { $($sndSock.LastErrorText) exit } # Did the receiver get the correct number of bytes? if ($sndSock.ReceivedInt -ne $numBytes) { $("The receiver did not acknowledge with the correct number of bytes.") exit } $("File sent!") # ------------------------------------------------------------------------------------ # The code below is for the receiving side (running on some other computer..) $listenSock = New-Object Chilkat.Socket $success = $listenSock.BindAndListen(5555,25) if ($success -ne $true) { $($listenSock.LastErrorText) exit } # Get the next incoming connection # Wait a maximum of 20 seconds (20000 millisec) $rcvSock = $listenSock.AcceptNextConnection(20000) if ($rcvSock -eq $null ) { $($listenSock.LastErrorText) exit } # The sender will first send the big-endian integer for the number of bytes # that are forthcoming.. $success = $rcvSock.ReceiveInt32($bBigEndian) if ($success -ne $true) { $($rcvSock.LastErrorText) exit } $numBytesComing = $rcvSock.ReceivedInt # Receive that many bytes.. $bdReceived = New-Object Chilkat.BinData $success = $rcvSock.ReceiveBdN($numBytesComing,$bdReceived) if ($success -ne $true) { $($rcvSock.LastErrorText) exit } # Acknowledge the sender by sending back the number of bytes we received. $success = $rcvSock.SendInt32($bdReceived.NumBytes,$bBigEndian) # Close the connection. $maxWaitMs = 20 $rcvSock.Close($maxWaitMs) # Save the received data to a file. $success = $bdReceived.WriteFile("somePath/someFile.dat") # Assume success for the example... $("File received!") |
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