The HttpKernelInterface is a lie

Transcript

1. the HttpKernelInterface is a lie
2. @igorwesome
4. “Interface” Protocol Communication Message passing
5. Catherine Please, from The Noun Project
6. Paulo Sá Ferreira - Purple Matter, from The Noun Project
7. hi!
10. 1001010111010010000110101 Massimiliano Mauro, from The Noun Project
11. Sergey Shmidt, from The Noun Project aloha!
12. yay!
20. 1234 4321
21. foo bar baz foo baz Patrick n Hawaii, from The Noun Project
22. foo moo Anuar Zhumaev, from The Noun Project
23. find src -name '*.php' | grep -iv tests | cut -f2- -d/ | cut -f1 -d\. | awk '{ print length, $0 }' | sort -n | tr / \\ ;
24. Tim Boelaars, from The Noun Project
26. nc
27. /\_/\ / 0 0 \ ====v==== \ W / | | _ / ___ \ / / / \ \ | (((-----)))-' / ( ___ \__.=|___E /
29. data Dmitry Baranovskiy, from The Noun Project
30. xinetd
32. /etc/xinet.d/<service> service <service> { disable = no socket_type = stream protocol = tcp user = <user> wait = no server = /usr/local/bin/<program> }
33. /etc/xinet.d/fortune service fortune { disable = no socket_type = stream protocol = tcp user = xinetd wait = no server = /usr/local/bin/fortune }
34. #!/bin/bash fortune | cowsay
35. $ nc <host> 7777
36. $ nc <host> 7777 ______________________________________ < Eat right, stay fit, and die anyway. > -------------------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || ||
37. /etc/xinet.d/cowsay service cowsay { disable = no socket_type = stream protocol = tcp user = xinetd wait = no server = /usr/games/cowsay }
38. $ echo 'moo' | nc <host> 7778
39. $ echo 'moo' | nc <host> 7778 _____ < moo > ----- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || ||
40. #!/usr/bin/php <?php while (!feof(STDIN)) { echo transform(fgets(STDIN)); }
41. cgi
42. The Common Gateway Interface (CGI) [22] allows an HTTP [1], [4] server and a CGI script to share responsibility for responding to client requests. RFC 3875
43. xinetd tcp http httpd
44. http httpd script cgi
45. script env vars data headers data
46. GET / HTTP/1.1 Host: igor.io Accept: */* REQUEST_METHOD = GET PATH_INFO = / HTTP_HOST = igor.io HTTP_ACCEPT = */* SERVER_NAME = igor.io =>
47. Content-Type: text/html <!DOCTYPE html> <html> ... </html>
48. curl => inetd | web | cgi
49. fcgi
50. script
51. sockets are the new pipes
52. • 1991: HTTP • 1993: CGI • 1995: PHP • 1996: FastCGI
53. • 1997: Java Servlet • 2003: Python WSGI • 2007: Ruby Rack • 2009: Perl PSGI • 2011: Symfony2 HttpKernelInterface
54. rack
55. class HelloWorld def call(env) [ 200, {"Content-Type" => "text/plain"}, ["Hello world!"] ] end end
56. function helloWorld(array $env) { return [ 200, ["Content-Type" => "text/plain"], ["Hello world!"], ]; }
57. sapi
58. $_SERVER header echo exit
59. HttpKernelInterface
60. sapi kernel
61. tcp websocket HTTP/1.1 <soap> {“JSON”}
62. “legacy” apps: it’s all great until exit;
63. myths:
64. myths: caching
65. myths: caching (use varnish)
66. myths: caching (use varnish) functional tests
67. CgiHttpKernel adapter from kernel to cgi functional test “legacy” apps
68. kernel CGI
69. kernel CGI anything!
70. export SCRIPT_NAME=/app.php export SCRIPT_FILENAME=/var/www/app.php export PATH_INFO=/foo export QUERY_STRING="bar=baz&qux=quux" export REQUEST_URI=/foo export REQUEST_METHOD=GET php-cgi app.php
71. $kernel = new CgiHttpKernel(__DIR__.'/app'); $request = Request::create('/index.php'); $response = $kernel->handle($request); var_dump($response->getContent());
72. use Symfony\Component\HttpKernel\Client; $client = new Client($kernel); $crawler = $client->request('GET', '/index.php');
73. caution: it’s slow (but could be optimized)
74. Where is the value?
75. REQ REP
76. fcgi roles
77. authorizer httpd responder filter
78. rack middlewares
79. class EmptyDecorator def initialize(app) @app = app end def call(env) @app.call(env) end end
80. class CommonLogger def initialize(app, logger=nil) @app = app @logger = logger end def call(env) began_at = Time.now response = @app.call(env) status, header, _ = response log(env, status, header, began_at) response end private def log(env, status, header, began_at) ... end end
81. class CommonLogger def initialize(app, logger=nil) @app = app @logger = logger end def call(env) began_at = Time.now response = @app.call(env) status, header, _ = response log(env, status, header, began_at) response end private def log(env, status, header, began_at) ... end end
82. class CommonLogger def initialize(app, logger=nil) @app = app @logger = logger end def call(env) began_at = Time.now response = @app.call(env) status, header, _ = response log(env, status, header, began_at) response end private def log(env, status, header, began_at) ... end end
83. class CommonLogger def initialize(app, logger=nil) @app = app @logger = logger end def call(env) began_at = Time.now response = @app.call(env) status, header, _ = response log(env, status, header, began_at) response end private def log(env, status, header, began_at) ... end end
84. class CommonLogger def initialize(app, logger=nil) @app = app @logger = logger end def call(env) began_at = Time.now response = @app.call(env) status, header, _ = response log(env, status, header, began_at) response end private def log(env, status, header, began_at) ... end end
85. HttpKernel middlewares
86. $app = new CallableHttpKernel(function ($request) { return new Response('Hello World!'); });
87. class Logger implements HttpKernelInterface { private $app; private $logger; public function __construct(HttpKernelInterface $app, LoggerInterface $logger) { $this->app = $app; $this->logger = $logger; } public function handle(Request $request, ...) { $response = $this->app->handle($request, $type, $catch); $this->log($request, $response); return $response; } private function log(Request $request, Response $response) { ... } }
88. use Symfony\Component\HttpKernel\HttpCache\HttpCache; use Symfony\Component\HttpKernel\HttpCache\Store; $app = new HttpCache( $app, new Store(__DIR__.'/cache') );
89. use Symfony\Component\HttpKernel\HttpCache\HttpCache; use Symfony\Component\HttpKernel\HttpCache\Store; $app = new HttpCache( $app, new Store(__DIR__.'/cache') ); use varnish!
90. App Logger Authentication Session
92. CHH simensen igorw
93. class Foo implements HttpKernelInterface { private $app; public function __construct(HttpKernelInterface $app) { $this->app = $app; } public function handle(Request $request, ...) { $response = $this->app->handle($request, $type, $catch); return $response; } } 1 2 3
94. UrlMap $blog = new Silex\Application(); $blog->get('/', function () { return 'This is the blog!'; }); $app = new Stack\UrlMap($app, [ '/blog' => $blog, ]);
95. Session $app = new CallableHttpKernel(function ($request) { $session = $request->getSession(); ... }); $app = new Stack\Session($app);
96. OAuth $app = new Stack\OAuth($app, [ 'key' => 'foo', 'secret' => 'bar', 'callback_url' => 'http://localhost:8080/auth/verify', 'success_url' => '/', 'failure_url' => '/auth', ]); $app = new Stack\Session($app);
97. OAuth $app = new CallableHttpKernel(function ($request) { $token = $request->attributes->get('oauth.token'); if (!$token) { return new RedirectResponse('/auth'); } $params = $token->getExtraParams(); return sprintf('Welcome @%s!', $params['screen_name']); });
98. Composition!
99. $stack = (new Stack\Builder()) ->push('Stack\Session') ->push('Stack\OAuth', [...]) ->push('Foo'); $app = $stack->resolve($app);
100. It doesn’t stop there
101. • Authentication • Debug toolbar • Injected routes • Signed cookies • Asset management • Force SSL • Error handling
102. Choose wisely
103. Michael Rowe, from The Noun Project
104. • joind.in/8666 • stackphp.com • @stackphp • @igorwesome • github.com/igorw/CgiHttpKernel