The use of Symfony2 @ Overblog

The use of Symfony2 @ Overblog By Xavier HAUSHERR and Gérald Lonlas

About UsXavier HAUSHERR Gerald LONLASCTO Project manager Twitter: @xkobal Twitter: @geraldlonlas

What is OverBlog?Born in 2004, OverBlog is the top leading Europeanblogging platform.Was the ﬁrst platform to share the revenue generated bythe audience.It’s also: 2 millions blogs in 5 languages 35 millions uniques visitors per month 250 millions pages views per month 13th French site audience 50 servers to serve blogs

OverBlog before Symfony 2The previous version of OverBlog is based on: Jelix framework 1.1 Custom PHP 5.2 Postgresql 8Spread on 50 servers: 1 database master 11 databases slaves 38 hits and caches

OverBlog technical speciﬁcations Capable of handling the load Be scalable Separate services: may be switch off Reducing the pages execution time Speed up data access Stop with the monolith Test driven development Take pleasure to develop

PHP FrameworksJelix 1.3: Small community Product continuityZend framework 1: Not full stack Not a frameworkSymfony 1: End of life not enough modular performances

Why Symfony 2?Full stack framework Young frameworkDependency injection Too few bundlesGood performances Strongly coupled with DoctrineTwig & I18N Time/cost to learnSymfony communitySensio supportTeam experience in Symfony 1

The use of Symfony2 @ OverblogService Oriented Architecture

Projects DistributionOne Symfony project for each part of the platform.Each project must be independent and could be in any language Administra-on Comments Core Developer0 Portal Sta-s-cs Center Users00(SSO)

Software Used

Projects Distribution

Service Architecture www Internal API Front End Web Project API Databases

The use of Symfony2 @ Overblog Transport Layer

First Try: JSON-RPCEasy to codeREST is natively integrated into SymfonyObject must be rebuilt from JSONNo type validationNo standardNo data model Poor performance

Some statistics about Web Services Size (bytes) Thrif - TCompactProtocol Thrift - TBinaryProtocol Protocol BuffersRemote Method Invocation (RMI) REST - JSON REST - XML 0 100 200 300 400 500 600 700 800 900 1000 Average Wall Time for 10000 queries (s) Thrif - TCompactProtocol Thrift - TBinaryProtocol Protocol BuffersRemote Method Invocation (RMI) REST - JSON REST - XML 0 50 100 150 200 250 300 350 400 http://jnb.ociweb.com/jnb/jnbJun2009.html

Second Try: Apache ThriftDeveloped by FacebookIncubated by Apache Software FoundationObject data modelDeﬁnition are compiled into classes and interfacesCross languageBasic type validationBinary transferPHP extensionNo Symfony integrationObsolete PHP LibrarySmall community

Thrift Integration In Symfony Client Server1. Thrift fork Give compatibility with Controler Business Service UniversalClassLoader Real namespace usage } Thrift Remove hardcoded inclusion Bundle Generated code2. We create a bundle to integrate Thrift into Service client } Service client Symfony write () / read () write () / read () Dependency injection integration Deﬁnitions are compiled at cache warmup TProtocol TProtocol in cache directory Autoloader or Factory to instantiate object TTransport TTransport 2 modes: HTTP Controller or Socket daemon Unit Tests Input / Input / output output3. Work with developers to integrate these modiﬁcations into the next Thrift release.

Thrift Deﬁnitionnamespace php ThriftModel.Usernamespace java com.overblog.thriftModel.userinclude "Generic/Image.thrift"exception InvalidValueException{ 1: i32 code, 2: string message}enum Lang{ FR, EN}struct User{ 1: i64 id, 2: string email, 3: optional string password, 4: optional Image avatar}service UserService{ User getUserById(1: i64 id) throws (1: InvalidValueException e), bool deleteUser(1: i64 id) throws (1: InvalidValueException e)}

Thrift Integration In Symfony services: overblog_api.extension.user: class: OverblogUserInternalApiBundleApiUserExtension arguments: [@service_container] tags: -: { name: "thrift.extension" } overblog_thrift: services: user: definition: User namespace: ThriftModelUser bundleNameIn: OverblogCommonBundle server: true servers: user: service: user handler: overblog_api.extension.user clients: comment: service: user type: http hosts: comment: host: 192.168.0.1 port: 8080

Thrift Integration In Symfonynamespace OverblogUserInternalApiBundleController;use SymfonyBundleFrameworkBundleControllerController;class UserController extends Controller{ public function getUserAction($id) { try { $p = $this->get(thrift.client.user) ->getClient() ->getUserById($id); } catch (Exception $e) { throw $this->createNotFoundException(); } }}

Thrift Integration In Symfonynamespace OverblogUserInternalApiBundleApi;use ThriftModelUserUserIf;use OverblogThriftBundleApiExtensionsBaseExtension;class UserExtension extends BaseExtension implements UserIf{ public function getUserById($id) { return $this->getInstance( ThriftModelUserUser, array( id => $id, email => user@overblog.com, lang => ThriftModelUserLang::FR ) ); }}

The use of Symfony2 @ OverblogSecurity Bundle: Overblog SSO

Why a SSO ?Need only one authentication for several services:•Administration,•Comments,•Portal•Public API (Mobile app)Session must be checked in PHP or JavascriptScalability.Must be able to kill a sessionCan be plugged with other system

SSO with Security BundleUse the Symfony Security LayerOne provider per serviceBundle creation to secure servicesMain entry point is located on SSOLogout disconnect from project and SSOToken deﬁnition with rights embeddedUse RememberMe functionality to have long authenticationCatch security exception to return 401 instead of redirect

SSO Diagram 3. User is prompted to log inUser 1. User hit a protected ressource 2. User is redirected to SSO5. User can now 4. SSO notiﬁes the server thataccess the ressource access has been granted by redirecting user with token

The use of Symfony2 @ OverblogBlog themes with Twig sandbox

Blog renderingFunctional speciﬁcations: Allow the fully customization of themes Friendly meta language Sandbox the theme execution Cache pages Good performance

Why Twig?The markupAllow sandboxing & policiesMaking our own ﬁltersCompiling theme markupPacked with Symfony 2

Twig usage Twig_loader_string No cache Twig_loader_string With cache

Sandbox conﬁguration# Twig sandbox policy parameters sandbox_policy.tags: [if,list] sandbox_policy.filters: [capitalize, date, default, upper, lower] sandbox_policy.function: [Custom] sandbox_policy.properties: {} sandbox_policy.methods: OverblogThemeServiceBundleModelBlogInterface: - getTitle - getUrl# Init Sandbox parameterstwig.extension.sandbox.policy: class: Twig_Sandbox_SecurityPolicy arguments: [ %sandbox_policy.tags%, %sandbox_policy.filters%,%sandbox_policy.methods%, %sandbox_policy.properties%,%sandbox_policy.function% ]# Enable Twig Sandbox extensiontwig.extension.sandbox: class: Twig_Extension_Sandbox arguments: [@twig.extension.sandbox.policy, false]

Evaluate Twig markup $source = <html>.....</html>; require_once /path/to/lib/Twig/Autoloader.php; Twig_Autoloader::register(); $loader = new Twig_Loader_String(); $twig = new Twig_Environment($loader, array( cache => false, )); $sandboxExtension = new Twig_Extension_Sandbox(); $sandboxExtension->enableSandbox(); $twig->addExtension($sandboxExtension); try { // Evaluate theme with Twig Sandbox $twig->loadTemplate($source)->render( $this->getMockParams() ); } catch (Twig_Sandbox_SecurityError $e) { throw new Exception(Syntax not allowed); }

The use of Symfony2 @ Overblog Internationalization

InternationalizationOverBlog is ported in 5 languages English, French, Spanish, Italian, GermanOur best combo XLIFF format. Pootle opensource tool

XLIFF markupXLIFF generated by Pootle<trans-unit id="january" approved="yes"> <source>january</source> <target state="translated">January</target></trans-unit>

Thanks for your time Questions? Take some time to create your blog on en.over-blog.com

LinksThrift fork: https://github.com/ebuzzing/thriftThrift bundle: https://github.com/ebuzzing/OverblogThriftBundleJIRA: https://issues.apache.org/jira/browse/THRIFT-1615Pootle: http://translate.sourceforge.net/wiki/pootle/index

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The use of Symfony2 @ Overblog

by Xavier Hausherr

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