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Y U NO PHP?

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@igorwesome

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var http = require('http'); var server = new http.Server(); server.on('request', function (req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello World\n'); }); server.listen(1337, '127.0.0.1');

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$server = stream_socket_server('tcp://127.0.0.1:1337'); while ($conn = stream_socket_accept($server, -1)) { fwrite($conn, "HTTP/1.1 200 OK\r\n"); fwrite($conn, "Content-Length: 3\r\n\r\n"); fwrite($conn, "Hi\n"); fclose($conn); }

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$s=stream_socket_server('tcp://[::1]:81'); while($c=stream_socket_accept($s,-1)) fwrite($c,"HTTP/1.1 200 OK\r\nContent-Length: 2\r\n\r\nHi");

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Non-blocking I/O

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C10K

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Calculations are fast, I/O is slow.

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Latency Comparison Numbers -------------------------- L1 cache reference 0.5 ns Branch mispredict 5 ns L2 cache reference 7 ns Mutex lock/unlock 25 ns Main memory reference 100 ns Compress 1K bytes with Zippy 3,000 ns Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms Read 4K randomly from SSD* 150,000 ns 0.15 ms Read 1 MB sequentially from memory 250,000 ns 0.25 ms Round trip within same datacenter 500,000 ns 0.5 ms Read 1 MB sequentially from SSD* 1,000,000 ns 1 ms Disk seek 10,000,000 ns 10 ms Read 1 MB sequentially from disk 20,000,000 ns 20 ms Send packet CA->Netherlands->CA 150,000,000 ns 150 ms

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Latency Comparison Numbers -------------------------- L1 cache reference 0.5 ns Branch mispredict 5 ns L2 cache reference 7 ns Mutex lock/unlock 25 ns Main memory reference 100 ns Compress 1K bytes with Zippy 3,000 ns Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms Read 4K randomly from SSD* 150,000 ns 0.15 ms Read 1 MB sequentially from memory 250,000 ns 0.25 ms Round trip within same datacenter 500,000 ns 0.5 ms Read 1 MB sequentially from SSD* 1,000,000 ns 1 ms Disk seek 10,000,000 ns 10 ms Read 1 MB sequentially from disk 20,000,000 ns 20 ms Send packet CA->Netherlands->CA 150,000,000 ns 150 ms

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stream_select

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$readable = $read ?: null; $writable = $write ?: null; $except = null; if (stream_select($readable, $writable, $except, 1)) { if ($readable) { foreach ($readable as $stream) { ... } } if ($writable) { foreach ($writable as $stream) { ... } } }

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$readable = $read ?: null; $writable = $write ?: null; $except = null; if (stream_select($readable, $writable, $except, 1)) { if ($readable) { foreach ($readable as $stream) { ... } } if ($writable) { foreach ($writable as $stream) { ... } } } Event Loop

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Event-driven, non-blocking I/O with PHP.

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Demo

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$loop = React\EventLoop\Factory::create(); $socket = new React\Socket\Server($loop); $http = new React\Http\Server($socket); $http->on('request', function ($req, $rep) { $rep->writeHead(); $rep->end("Hello World!\n"); }); $socket->listen(8080); $loop->run();

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$loop = React\EventLoop\Factory::create(); $socket = new React\Socket\Server($loop); $socket->on('connection', function ($conn) { $conn->pipe($conn); }); $socket->listen(4000); $loop->run();

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# composer.json { "require": { "react/http": "0.2.*" } }

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$ composer install

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Philosophy

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Architecture

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Événement EventEmitter for PHP

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$emitter = new Evenement\EventEmitter(); $emitter->on('data', function ($data) { echo $data; }); $emitter->emit('data', [$data]);

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EventLoop Stream Socket Http

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EventLoop $loop = React\EventLoop\Factory::create(); $server = stream_socket_server('tcp://127.0.0.1:8080'); stream_set_blocking($server, 0); $loop->addReadStream($server, function ($server) use ($loop) { $conn = stream_socket_accept($server); ... });

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EventLoop $loop->addPeriodicTimer(5, function () { $memory = memory_get_usage() / 1024; $formatted = number_format($memory, 3).'K'; echo "Current memory usage: {$formatted}\n"; });

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EventLoop $loop->run();

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EventLoop backends stream_select libevent libev upcoming libuv

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ReadableStream isReadable() pause() resume() close() Events data, end, error, close Stream

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ReadableStream isReadable() pause() resume() close() Events data, end, error, close Stream

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WritableStream isWritable() write($data) end($data) close() Events drain, error, close, pipe Stream

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WritableStream isWritable() write($data) end($data) close() Events drain, error, close, pipe Stream

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Stream $source = new React\Stream\Stream(fopen('omg.txt', 'r'), $loop); $dest = new React\Stream\Stream(fopen('wtf.txt', 'w'), $loop); $source->pipe($dest);

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Stream $a->pipe($b)->pipe($c); a | b | c

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Socket $socket = new React\Socket\Server($loop); $socket->on('connection', function ($conn) { $conn->write("Hello there!\n"); $conn->write("Welcome to this amazing server!\n"); $conn->write("Here's a tip: don't say anything.\n"); $conn->on('data', function ($data) use ($conn) { $conn->close(); }); }); $socket->listen(1337);

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Http $socket = new React\Socket\Server($loop); $http = new React\Http\Server($socket); $http->on('request', function ($request, $response) { $response->writeHead(200, ['Content-Type' => 'text/plain']); $response->end("Hello World!\n"); }); $socket->listen(1337);

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EventLoop Stream Socket Http

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Http HttpClient DNS

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HttpClient Http DNS Stomp Whois

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HttpClient Http DNS Stomp Whois WebSocket DNode SOCKS IRC

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$foo->get(function ($bar) { $bar->get(function ($baz) { $baz->get(function ($bazinga) { $bazinga->get(function () { throw new FuckItException(); }); }); }); });

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async API (escaping callback hell)

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React/Async

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use React\Async\Util as Async; Async::waterfall([ function ($callback) use ($foo) { $foo->get($callback); }, function ($bar, $callback) { $bar->get($callback); }, function ($baz, $callback) { $baz->get($callback); }, function ($bazinga, $callback) { $bazinga->get($callback); }, function ($callback) { throw new FuckItException(); } ]);

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React/Promise

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$dns ->resolve('igor.io') ->then(function ($ip) { echo "Host: $ip\n"; });

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$promise ->then('doStuff') ->then('doMoreStuff') ->then('explosion') ->then(null, function ($e) { echo "[Error] {$e->getMessage()}\n"; });

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Deferred Promise Resolver Consumer Producer then() resolve() reject()

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Streams

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Readable Writable

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Readable Writable Through

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Readable Writable Through Composite

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Buffered Sink

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Bi-directional

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conn logger parser $conn->pipe($inputLogger)->pipe($parser);

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parser client $parser->on('message', function ($message) use ($client) { $client->say('pong'); });

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client conn logger $client->pipe($outputLogger)->pipe($conn);

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conn parser client conn

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Houston we have a blocking call

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Inter-process communication

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React/ZMQ

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$context = new React\ZMQ\Context($loop); $push = $context->getSocket(ZMQ::SOCKET_PUSH); $push->connect('tcp://127.0.0.1:5555'); $push->send('hello');

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React/Stomp Predis/Async DNode-PHP

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RealtimeWeb™

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Ratchet

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gifsockets!!!11

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Questions? • joind.in/7969 • reactphp.org • @reactphp • @igorwesome

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Questions? • joind.in/7969 • reactphp.org • @reactphp • @igorwesome

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Http Server Worker Client Worker Worker Client Client HTTP