Receive File on Socket

Demonstrates how to listen for an incoming socket connection and receive a file. The received file is saved to disk.

Download Chilkat FileAccess ActiveX (freeware)

Download Chilkat Socket ActiveX

<?php

$listenSocket = new COM("Chilkat.Socket");

$success = $listenSocket->UnlockComponent('Anything for 30-day trial');
if ($success != true) {
    print 'Failed to unlock component' . "\n";
    exit;
}

//  Bind to a port and listen for incoming connections:
//  This example will listen at port 5555 and allows for a backlog
//  of 25 pending connection requests.
$success = $listenSocket->BindAndListen(5555,25);
if ($success != true) {
    print $listenSocket->lastErrorText() . "\n";
    exit;
}

//  Get the next incoming connection
//  Wait a maximum of 20 seconds (20000 millisec)

// connectedSocket is a Chilkat.Socket
$connectedSocket = $listenSocket->AcceptNextConnection(20000);
if (is_null($connectedSocket)) {
    print $listenSocket->lastErrorText() . "\n";
    exit;
}

//  Set maximum timeouts for reading an writing (in millisec)
$connectedSocket->MaxReadIdleMs = 10000;
$connectedSocket->MaxSendIdleMs = 10000;

//  Receive the byte count of the file data that is forthcoming:

$fileSize = $connectedSocket->ReceiveCount();
if ($fileSize < 0) {
    print $connectedSocket->lastErrorText() . "\n";
    exit;
}

$fileData = $connectedSocket->ReceiveBytesN($fileSize);
if ($connectedSocket->LastMethodFailed == true) {
    print $connectedSocket->lastErrorText() . "\n";
    exit;
}

//  Close the connection.
//  Wait a max of 20 seconds (20000 millsec)
$connectedSocket->Close(20000);

//  Write the received data to a file.
//  This example receives a GIF image file.
$fac = new COM("Chilkat.FileAccess");

$success = $fac->WriteEntireFile('received.gif',$fileData);
if ($success != true) {
    print $listenSocket->lastErrorText() . "\n";
    exit;
}

print 'success!' . "\n";
?>