React (phpbnl13)

2. Y U NO PHP?
3. @igorwesome
7. 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');
9. $server = stream_socket_server('tcp://127.0.0.1:1337'); while ($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); }
10. $s=stream_socket_server('tcp://[::1]:81'); while($c=stream_socket_accept($s,-1)) fwrite($c,"HTTP/1.1 200 OK\r\nContent-Length: 2\r\n\r\nHi");
11. Non-blocking I/O
12. C10K
13. Calculations are fast, I/O is slow.
14. 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
15. 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
17. stream_select
18. $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) { ... } } }
19. $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
22. Event-driven, non-blocking I/O with PHP.
23. Demo
24. $loop = React\EventLoop\Factory::create(); $socket = new React\Socket\Server($loop); $http = new React\Http\Server($socket, $loop); $http->on('request', function ($req, $rep) { $rep->writeHead(); $rep->end("Hello World!\n"); }); $socket->listen(8080); $loop->run();
25. $loop = React\EventLoop\Factory::create(); $socket = new React\Socket\Server($loop); $socket->on('connection', function ($conn) { $conn->pipe($conn); }); $socket->listen(4000); $loop->run();
27. # composer.json { "require": { "react/http": "0.2.*" } }
28. $ composer install
29. Philosophy
30. Architecture
31. Événement EventEmitter for PHP
32. $emitter = new Evenement\EventEmitter(); $emitter->on('data', function ($data) { echo $data; }); $emitter->emit('data', [$data]);
33. EventLoop Stream Socket Http
34. 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); ... });
35. EventLoop $loop->addPeriodicTimer(5, function () { $memory = memory_get_usage() / 1024; $formatted = number_format($memory, 3).'K'; echo "Current memory usage: {$formatted}\n"; });
36. EventLoop $loop->run();
37. EventLoop backends stream_select libevent libev upcoming libuv
38. ReadableStream isReadable() pause() resume() close() Events data, end, error, close Stream
39. ReadableStream isReadable() pause() resume() close() Events data, end, error, close Stream
40. WritableStream isWritable() write($data) end($data) close() Events drain, error, close, pipe Stream
41. WritableStream isWritable() write($data) end($data) close() Events drain, error, close, pipe Stream
42. Stream $source = new React\Stream\Stream(fopen('omg.txt', 'r'), $loop); $dest = new React\Stream\Stream(fopen('wtf.txt', 'w'), $loop); $source->pipe($dest);
43. Stream $a->pipe($b)->pipe($c); a | b | c
44. 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);
45. 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);
46. EventLoop Stream Socket Http
47. Http HttpClient DNS
48. HttpClient Http DNS Stomp Whois
49. HttpClient Http DNS Stomp Whois WebSocket DNode SOCKS IRC
51. $foo->get(function ($bar) { $bar->get(function ($baz) { $baz->get(function ($bazinga) { $bazinga->get(function () { throw new FuckItException(); }); }); }); });
52. async API (escaping callback hell)
53. React/Async
54. use React\Async\Util as Async; Async::waterfall([ function ($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(); } ]);
55. React/Promise
56. $dns ->resolve('igor.io') ->then(function ($ip) { echo "Host: $ip\n"; });
57. $promise ->then('doStuff') ->then('doMoreStuff') ->then('explosion') ->then(null, function ($e) { echo "[Error] {$e->getMessage()}\n"; });
58. Deferred Promise Resolver Consumer Producer then() resolve() reject()
59. Streams
60. Readable Writable
61. Readable Writable Through
62. Readable Writable Through Composite
63. Buffered Sink
64. Bi-directional
65. conn logger parser $conn->pipe($inputLogger)->pipe($parser);
66. parser client $parser->on('message', function ($message) use ($client) { $client->say('pong'); });
67. client conn logger $client->pipe($outputLogger)->pipe($conn);
68. conn parser client conn
69. Houston we have a blocking call
70. Inter-process communication
71. React/ZMQ
72. $context = new React\ZMQ\Context($loop); $push = $context->getSocket(ZMQ::SOCKET_PUSH); $push->connect('tcp://127.0.0.1:5555'); $push->send('hello');
73. React/Stomp Predis/Async DNode-PHP
74. RealtimeWeb™
75. Ratchet
76. gifsockets!!!11
80. Questions? • joind.in/7805 • reactphp.org • @reactphp • @igorwesome
81. Questions? • joind.in/7805 • reactphp.org • @reactphp • @igorwesome
82. Http Server Worker Client Worker Worker Client Client HTTP