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vendor/clue/socks-react/examples/13-server-blacklist.php

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+<?php
+
+// A SOCKS server that rejects connections to some domains (blacklist / filtering)
+
+use React\EventLoop\Factory as LoopFactory;
+use ConnectionManager\Extra\Multiple\ConnectionManagerSelective;
+use React\Socket\Server as Socket;
+use Clue\React\Socks\Server;
+use ConnectionManager\Extra\ConnectionManagerReject;
+use React\Socket\Connector;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$loop = LoopFactory::create();
+
+// create a connector that rejects the connection
+$reject = new ConnectionManagerReject();
+
+// create an actual connector that establishes real connections
+$permit = new Connector($loop);
+
+// this connector selectively picks one of the the attached connectors depending on the target address
+// reject youtube.com and unencrypted HTTP for google.com
+// default connctor: permit everything
+$connector = new ConnectionManagerSelective(array(
+    '*.youtube.com' => $reject,
+    'www.google.com:80' => $reject,
+    '*' => $permit
+));
+
+// listen on 127.0.0.1:1080 or first argument
+$listen = isset($argv[1]) ? $argv[1] : '127.0.0.1:1080';
+$socket = new Socket($listen, $loop);
+
+// start the actual socks server on the given server socket and using our connection manager for outgoing connections
+$server = new Server($loop, $socket, $connector);
+
+echo 'SOCKS server listening on ' . $socket->getAddress() . PHP_EOL;
+
+$loop->run();