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C++ Plugins loading - Step 1

Jean-Baptiste Le Stang — 2009-11-15T21:53:50Z

I've written a simple application in C++ that will loads dynamic libraries (called in our case bundles):
one bundle can publish several services
the applications loads every bundles
every bundles registers the list of services they provide
every bundle gives the list of services they are expecting.

Every bundle interested by a service will be notified when the service is loaded. No matter what the load order is.

In order to achieve the plugin loading, each library must implements the following method (I've a Macro that will generate the required code : DeclareBundle(t) in interfaces.h)

Bundle * BundleLoader(){ return new BundleOfTheLibrary();}

The project is actually a Xcode project, creating a make file is left as an exercice ...

The application is really simple and does not handles error cases :p this will be done in step 2 :p

(Vel)ou pas :/

Jean-Baptiste Le Stang — 2009-09-07T21:32:22Z

Suite à une demande de JCDecaux, je ne suis plus en mesure de fournir l'application Velou sur l'AppStore sous la forme actuelle. Dans les jours à venir l'application devrait être à nouveau disponible sur l'AppStore mais sans la disponibilité des systèmes de vélo partage gérès par JCDecaux. De nombreuses améliorations notamment sur les pistes cyclables mais également sur le chargement des données ne verront donc pas le jour du fait de l'interdiction d'utilisation des données de JCDecaux.

Voila des screenshots de ce que la nouvelle version aurait dû-être :

Velou 1.1

Jean-Baptiste Le Stang — 2009-09-01T21:58:13Z

La version 1.1 de Velou a été soumise il y a quelques jours sur l'AppStore, cette version apportera la compatibilité avec d'autres systèmes de vélo-partage disponibles dans le monde :

Ajout des villes suivantes : Perpignan, Dijon, Barcelone, Milan, Caen, Montréal, Zaragoza, Rennes, Nice, Vannes, La plaine Saint-Denis.
Amélioration de l'affichage des pistes cyclables sur Paris
Amélioration du temps de chargement de l'application

Si votre ville n'est pas disponible je vous invite a laisser un message sur le forum.

Velou 1.0

Jean-Baptiste Le Stang — 2009-09-01T21:55:14Z

La première version de Velou est disponible sur l'AppStore.

Velou est une application permettant de connaitre les bornes de vélo-partage à proximité de votre position actuelle. Cette application permet d'accéder aux informations des villes suivantes : Paris, Lyon, Mulhouse, Nancy, Besançon, Aix-en-Provence, Toulouse, Cergy-Pontoise, Nantes, Rouen, Amiens, Marseille, Bruxelles, Seville, Luxembourg

L'application permet également de gérer des favoris par ville et vous permet à tout instant de récupérer les informations de ces dernières.

Aucun besoin de configuration, l'application se connectera automatiquement sur le système de vélo-partage le plus près de votre position. Pour les utilisateurs Parisiens, l'application propose en plus l'affichage des pistes cyclables recensées par le projet OpenStreetMap .

POCO C++

Jean-Baptiste Le Stang — 2008-07-23T22:59:27Z

Recently I stumbled accross this site POCO . POCO stands for Portable Components Objects. You can find the following definition of POCO on their website : «POCO aims to be for network-centric, cross-platform C++ software development what Apple's Cocoa is for Mac development, or Ruby on Rails is for Web development — a powerful, yet easy to use platform to build your applications upon.». If you want to have an insight to POCO, you can read the following document . By using this kind of frameworks you can spend more time developping the unique features of your applications :D.

A good example of what can be done with POCO is «OSP (Open Service Platform) a service-oriented and component-based environment for developing, deploying, running and managing modular network-based applications. »

According to their website, the design of OSP has been inspired by OSGi Service Platform, an open specification based on Java technologies.

POCO is open source and free.

Site update

Jean-Baptiste Le Stang — 2008-01-01T17:50:25Z

The website has been updated to the latest version of SPIP (1.9.2) ! The new default themes are simply gorgeous, I really think that I won't be making much changes to this look apart from modifying the colours and removing a few things in the display of the articles. - Miscellaneous

Sensing the world around you

Jean-Baptiste Le Stang — 2007-11-20T23:07:08Z

I've recently discovered Phidgets that are simple sensors that can be interfaced using a USB port, the sensors are linked to an interface kit that communicate over USB. Right now I've been playing with a temperature, light, humidity and motion sensor. Using a it of C coding, a MySQL database, and Smile I've been able to quickly setup a prototype of a module dedicated to recording the various sensors in my bedroom, and you can see the result here . The graph is updated each minute. I'll be describing the whole setup and give away a few lines of C and AppleScript code for those interested in doing the same kind of things and also to show you that this is not really complicated.

Future evolution of the system will add a LCD screen that can be controlled thru a serial port and if I can find an easy to program module bluetooth, then I might decide to go totally wireless :D

CMS has been made public for developers

Jean-Baptiste Le Stang — 2007-11-20T22:57:14Z

The Cryptographic Message Syntax Services was finally made public in Lepoard , CMS is the way to go to digitally sign and encode for example an email (S/MIME format). As soon as I can get my copy of Leopard, I'll get my hands in this framework in order to add the ability to digitaly sign & encrypt mails being sent with XMail.

In the mean time you can have a look to the CMS documentation

Is this the end of spam, pishing & email forgery ?

Jean-Baptiste Le Stang — 2007-06-09T09:18:30Z

DKIM stands for DomainKeys Identified Mail is a method to verify & validate the identity of the sender of an electronic mail. DKIM is promoted by Yahoo , Cisco , AOL , Sendmail , Microsoft (and then they went off road and lost themselves with SenderID ) , IBM and many others famous firms.

DKIM base specification has been published as RFC 4871 in May 2007.

At first glance, DKIM will prevent you to receive mails from bill.gates@microsoft.com when it is rather evident that Bill did not send you this mail, DKIM allow you to verify that the person that pretend ot be sending the mail is really authoriezd to do so.

DKIM also insures the integrity of the content of the message being sent and certifies that the mail was not modified during transportation.

Here is an example using a mail being sent by GMail :

DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta;h=domainkey-signature:received:received:mime-version:content-transfer-encoding:message-id:content-type:to:from:subject:date:x-mailer;b=pUoO1+Iun1k9jN7eaJcHsuz15Ne1wSgQVrSGkB71ETUKD4vXcjDl0pHLc3a6egN46yjp1FRGKXIxWwOhSQ/oZhfhLBk2FQSuwUBb25K84RDgtMbfguldMgTRXBJBsh9IZYttxUYizjM8UlLHy0VpJ8bi0myEH7yMRl7l1Ed5uPM=
 
 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta;h=received:mime-version:content-transfer-encoding:message-id:content-type:to:from:subject:date:x-mailer;b=cxl1ruoBk7H+W7wjkAISjy9YDgCd9KrJo7+eXPhu/HaFuMD+vwq1zYLnQrkFJYcvnYN6jiUVqNsNmtl6LDlV9WXsRGrdpHAtom5iMftjpYayDm2bP0a3PApPre6MLOzGCAplJ8ZP7Hn+WYTdW1niBPUCHusWTmurToNeOSpANs=

When a mail server is not able to identify the sender of the mail using the plublic key of the domain of the sender, the mail will be considered as SPAM.

DKIM will make it easier for the end user to reject spams, however, DKIM won't have any impact on the bandwidth being used by the spamer because to be able to verify the sender, you have to get the whole content of the mail.

Some Open Source implementations already exists

Unfortunately, I've not been able to compile any of them on Mac OS X has an external library, I'll guess I'll have to do it myself from scratch :)

—

chances are that in a near future, DKIM will soon be added to XMail, though adding it to the transfert agent is not really required, beacuse it can be done by the transfering agent (SMTP server), this will make a very attractive feature for XMail

Curriculum Vitae français

Jean-Baptiste Le Stang — 2007-05-20T12:28:03Z

Voici une version française à jour de mon CV.


CV en français: Mon cv en français et à jour