Advanced symfony Techniques

Advanced symfony Techniques Kris Wallsmith

@kriswallsmith • Release Manager for symfony 1.3 & 1.4 • On Symfony and Doctrine teams • Senior Software Engineer at • 10 years experience with PHP and web development • Open source evangelist and international speaker • Hopeless plugin developer…

• DbFinderPlugin • sfPropelActAsPolymorphicBehaviorPlugin • sfControlPanelPlugin • sfSimpleBlogPlugin • sfDoctrineDynamicFormRelationsPlugin • sfSimpleCMSPlugin • sfDoctrineMasterSlavePlugin • sfSimpleForumPlugin • sfFeed2Plugin • sfSpyPlugin • sfFormYamlEnhancementsPlugin • sfSslRequirementPlugin • sfGoogleAnalyticsPlugin • sfStatsPlugin • sfGoogleWebsiteOptimizerPlugin • sfTaskExtraPlugin • sfModerationPlugin • sfWebBrowserPlugin • sfPagerNavigationPlugin

Please see me if you want to help with or take over a plugin's maintenance. Lots to choose from!

#phpmatsuri October 2-3, 2010 Tokyo

#phpmatsuri • Around 90 attendees • CakePHP, Symfony, & Lithium were represented • Most folks were CakePHP users • CakePHP documentation was translated early, so… • Please help translate Symfony2 & Doctrine2 documentation!

CAUTION PSEUDO CODE AHEAD

Host Aware Routing

domain.com

foobar.domain.com

barfoo.domain.com

homepage: url: / param: { module: main, action: indexOrDash }

homepage: url: / param: { module: main, action: indexOrDash } if (preg_match('/.../', $r->getHost(), $m))

class sfRoute • ->matchesUrl(...) Does the supplied URL match this route? GET / HTTP/1.0 Host: foobar.domain.com

class sfRoute Ver y slow • ->matchesUrl(...) url_for('main/dashboard?username=foobar') Does the supplied URL match this route? • ->matchesParameters(...) Do the supplied parameters match this route?

class sfRoute • ->matchesUrl(...) Does the supplied URL match this route? • ->matchesParameters(...) url_for('@dashboard?username=foobar') Do the supplied parameters match this route? • ->generate(...) Generate a URL using this route and these parameters.

->matchesUrl(...) • $url The current URI • $context An array of contextual information, including the current host • Returns false or an array of parameters extracted from the URI

->matchesParameters(...) • $params An associative array of parameter names and values • $context An array of contextual information, including the current host • Returns true or false

->generate(...) • $params An associative array of parameter names and values • $context An array of contextual information, including the current host • $absolute Whether to generate an absolute URL • Returns the generated URL

Process the host string with a second, internal route

public function __construct(...) { list($host, $pattern) = explode('/', $pattern, 2); $hostRoute = $this->createHostRoute($host, ...); parent::__construct(...); }

public function matchesUrl($url, $c) { // check parent::matchesUrl() first $hp = $hostRoute->matchesUrl('/'.$c['host'], $c); // include host parameters in return }

public function matchesParameters($p, $c) { $hp = $this->extractHostParams($p); return parent::matchesParameters($p, $c) && $hostRoute->matchesParameters($hp, $c); }

public function generate($p, $c, $abs) { $hp = $this->extractHostParams($p); // protocol, prefix... $host = $hostRoute->generate($hp, $c, false); $uri = parent::generate($p, $c, false); return $protocol.':/'.$host.$prefix.$uri; }

homepage: url: / param: { module: main, action: indexOrDash }

Hard co d homepage: e d F TL url: domain.com/ :( class: sfHostAwareRoute param: { module: main, action: index } dashboard: url: :username.domain.com/ class: sfHostAwareRoute param: { module: main, action: dashboard }

homepage: url: %APP_HOST%/ class: sfHostAwareRoute param: { module: main, action: index } dashboard: url: :username.%APP_HOST%/ class: sfHostAwareRoute param: { module: main, action: dashboard }

Custom Conﬁg Handler

class sfHostAwareRoutingConfigHandler extends sfRoutingConfigHandler { protected function parse($configFiles) { return array_map( array($this, 'filterRoute'), parent::parse($configFiles) ); } // ... }

FTW! Free protected function filterRoute($route) { list($class, $args) = $route; $args[0] = $this->replaceConstants($args[0]); return array($class, $args); }

# config_handlers.yml config/routing.yml: class: sfHostAwareRoutingConfigHandler file: %SF_LIB_DIR%/sfHostAwareRout...

sfHostAwareRoutingPlugin Add subdomains to your routing rules.

Graceful POST Authentication

An example…

CENSORED CENSORED

W here's my blog pos t!? ! AIL F

Extend the security ﬁlter

class GracefulSecurityFilter extends sfBasicSecurityFilter { protected function forwardToLoginAction() { // stash the interrupted request $attr->add(array( 'module' => $context->getActionName(), 'action' => $context->getModuleName(), 'method' => $request->getMethod(), 'params' => $requestParams->getAll(), ), 'stash'); parent::forwardToLoginAction(); } }

# filters.yml security: class: GracefulSecurityFilter

Replay the stashed request after login

// called after authentication protected function replayStashedRequest() { if ($s = $attr->removeNamespace('stash')) { $request->setMethod($s['method']); $params->clear(); $params->add($s['params']); $this->forward($s['module'], $s['action']); } }

Extra Security

An example…

# security.yml acceptInvitation: is_secure: true extra_credentials: account: { lifetime: 300 }

Events to the rescue!

controller.change_action

// connect to the event $ed->connect('controller.change_action', $cb)

// check security.yml $action->getSecurityValue('extra_credentials')

// check current user $u->getAttribute('extra_credentials', array())

// remove any expired credentials $now = time(); foreach ($creds as $name => $attr) { if ($now > $attr['expires_at']) { unset($creds[$name]); } }

// stash credentials and referer $u->setAttribute('challenge_credentials', ...) $u->setAttribute('challenge_referer', ...)

// forward to challenge form $controller->forward('security', 'challenge') throw new sfStopException();

// add the granted credentials $now = time(); foreach ($new as $name => $attr) { $creds[$name] = array( 'expires_at' => $now + $attr['lifetime'], ); } $u->setAttribute('extra_credentials', $creds);

// send them on their way $this->redirect($referer);

sfExtraSecurityPlugin Re-prompt your users for authentication.

Javascript Compression

class jsActions extends sfActions { public function executeWidget(sfWebRequest $req) { $this->lightbox = $req->hasParameter('lb'); $this->debug = $req->hasParameter('debug'); } }

<?php if ($debug): ?> console.log("embedding mootools"); <?php endif; ?> var e = document.createElement("script"); e.src = "<?php echo public_path('js/moo.js', true) ?>"; e.async = true; document.body.appendChild(e); // etc...

Custom View Class

# module.yml all: view_class: Javascript JavascriptView

class JavascriptView extends sfPHPView { public function render() { return $this->compress(parent::render()); } protected function compress() { // ... } }

$i = tempnam(sys_get_temp_dir(), __CLASS__); $o = tempnam(sys_get_temp_dir(), __CLASS__); file_put_contents($i, $content); shell_exec(vsprintf( 'java -jar %s --type js -o %s %s', array_map('escapeshellarg', array($yui, $o, $i)) )); return file_get_contents($o);

Standard Caching

# cache.yml widget: enabled: true with_layout: true

developer.yahoo.com/yui/compressor/

A Few Apache Tricks

rm web/.htaccess

AllowOverride None

<Directory /path/to/web> Include /path/to/.htaccess </Directory>

Core Assets

Missing Asset s #FAIL :(

AliasMatch /sf/(.*) /path/to/symfony/data/web/sf/$1 AliasMatch /sfDoctrinePlugin/(.*) /path/to/sfDoctrinePlugin/web/$1 NameVirtualHost *:80 <VirtualHost _default_:80> # ...

Assets Fo u nd FTW!

The Dreaded Trailing Slash…

AIL #F

RewriteEngine On RewriteRule ^(.*)/$ /$1 [R=301,L]

GET /about/ HTTP/1.1 Host: domain.com HTTP/1.1 301 Moved Permanently Location: http://domain.com/about

Embedded Forms

Book One book has many authors, Authors one author has many books. Person

Book: columns: title: string(255) relations: authors: { class: Person, refClass: BookAuthor } BookAuthor: columns: book_id: integer author_id: integer relations: book: { local: book_id } author: { class: Person, local: author_id } Person: columns: name: string(255)

// embed related forms $this->embedRelation('authors'); unset($this['authors_list']);

// embed related forms dynamically! $this->embedDynamicRelation('authors');

form.method_not_found form.filter_values

// called when a form is configured public function embedDynamicRelation($name) { $rel = $table->getRelation($name); $this->rels[] = $rel; $this->doEmbed($name, $obj->get($rel->getAlias())); }

// called when a form is bound public function filterValues(sfEvent $event, $values) { foreach ($this->rels as $rel) { $name = $rel->getName(); $this->doEmbed($name, $values[$name]); } $obj->addListener(new DeleteListener($form)); }

$parent = new BaseForm(); foreach ($values as $i => $value) { if (is_object($value)) { // create form with object } elseif ($value['id']) { // find previously embedded form } else { // create a new form } $parent->embedForm($i, $child); } $form->embedForm($rel->getName(), $parent);

// extract existing objects from embedded forms // and compare to the current object collection public function preSave(Doctrine_Event $event) { foreach ($coll as $i => $obj) { $pos = array_search($obj, $existing, true); if (false === $pos) $coll->remove($i); if ($column['notnull']) $obj->delete(); } }

sfDoctrineDynamicFormRelationsPlugin Common sense embedded forms.

Questions? • Host aware routing • Graceful POST authentication • Extra security • Javascript compression • Apache tricks • Embedded forms

OpenSky is Hiring! http://engineering.shopopensky.com Please contact me if you're interested.

Thank you!

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Advanced symfony Techniques

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