HTTP Middlewares in PHP by Eugene Dounar

HTTP Middlewares in PHP
http://igor.io @igorwhiletrue
@eugene_dounar

Interface?
interface A {
function doSomething();
function doSomethingElse();
}

Универсальный интерфейс

find src -name '*.php' |
grep -iv tests |
cut -f2- -d/ |
cut -f1 -d. |
awk '{ print length, $0 }' |
sort -n |
tr / ;

RFC 3875
The Common Gateway Interface (CGI) [22] allows an HTTP [1], [4] server
and a CGI script to share responsibility for responding to client requests.

script
Переменные
окружения
ENV
Заголовки
Тело ответа

GET / HTTP/1.1
Host: igor.io
Accept: */*
REQUEST_METHOD = GET
PATH_INFO = /
HTTP_HOST = igor.io
HTTP_ACCEPT = */*
SERVER_NAME = igor.io

Content-Type: text/html
<!DOCTYPE html>
<html>
...
</html>

def application(environ, start_response):
start_response('200 OK', [('Content-Type', 'text/plain')])
yield 'Hello Worldn'

app = lambda do |env|
body = "Hello, World!"
[200, {
"Content-Type" => "text/plain",
"Content-Length" => body.length.to_s
}, [body]]end
run app

php_sapi_name()
➔ aolserver
➔ apache
➔ apache2filter
➔ apache2handler
➔ caudium
➔ cgi (until PHP 5.3)
➔ cgi-fcgi
➔ cli
➔ continuity
➔ embed
➔ isapi
➔ litespeed
➔ milter
➔ nsapi
➔ phttpd
➔ pi3web
➔ roxen
➔ thttpd
➔ tux
➔ webjames

<?php
namespace SymfonyComponentHttpKernel;use
SymfonyComponentHttpFoundationRequest;use
SymfonyComponentHttpFoundationResponse;interface
HttpKernelInterface{
const MASTER_REQUEST = 1;
const SUB_REQUEST = 2;
public function handle(
Request $request,
$type = self::MASTER_REQUEST,
$catch = true
);}

Why?
Обернуть древний код для тестов?

Why?
Обернуть древний код для тестов?
exit(‘you lose’);

CgiHttpKernel
Адаптер CGI реализующий
интерфейс HttpKernelInterface

Why?
Кэширование?
$kernel = new AppCache($kernel);

Why?
Кэширование?
varnish
$kernel = new AppCache($kernel);

<?php$app = new CallableHttpKernel(function ($request) {
return new Response('Hello World!');});

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)
{
...
}}

$app = new Logger(
$app,
new MonologLogger());

Session
Authentication
Logger
App

Rack middlewares https://github.com/rack/rack/wiki/List-of-Middleware
WSGI middlewares http://wsgi.readthedocs.org/en/latest/libraries.html
HttpKernel middlewares ?

Идея:
Выполнять код до и после
обработки каждого запроса

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;
}}

Идея:
Выполнять код до и после
обработки каждого запроса
События?

$blog = new SilexApplication();$blog->get('/',
function () {
return 'This is the blog!';});$app = new
StackUrlMap($app, [
'/blog' => $blog,]);
UrlMap

$app = new CallableHttpKernel(function ($request) {
$session = $request->getSession();
...});$app = new StackSession($app);
Session

$app = new IgorwStackOAuth($app, [
'key'=> 'foo',
'secret'=> 'bar',
'callback_url' => 'http://localhost:8080/auth/verify',
'success_url'=> '/',
'failure_url'=> '/auth',]);$app = new StackSession($app);
OAuth

$request->attributes->get('oauth.token');

Простая композиция:

$stack = (new StackBuilder())
->push('StackSession')
->push('IgorwStackOAuth', [...])
->push('Foo');$app = $stack->resolve($app);

Middlewares!
● HttpCache
● GeoIp
● Backstage
● Basic Authentication
● CORS
● Firewall
● CookieGuard
● IpRestrict
● OAuth
● Hawk
● StackRobots

More?
● Authentication (~Warden)
● ForceSSL
● Debug toolbar
● ESI
● OpenID
● ...

stackphp.com
github.com/stackphp
@stackphp
“HttpKernel is a lie” by @igorwhiletrue

HTTP Middlewares in PHP by Eugene Dounar

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