RubyKaigi restarts - RubyKaigi 2013 -

In yesterday, dates and venue of RubyKaigi 2013 has been announced. Let's check this page.

Rekonq - the konqueror alternative -

Today, KDE project has announced they start the sub project "Reconq" - the konqueror alternative. This new browser is based on Webkit and featured for HTML5. And it requires Qt 4.8.x or after.

FreeBSD Study #9

In last Frieday, FreeBSD Study #9 was held in KDDI Web Commnications' Office.

大きな地図で見る

Today's session is "Managing storage on FreeBSD (vol.1)".

• What haappens between physical devices and /dev/* file on FreeBSD
  
  • GEOM is the framework to give abstract tiers between these
• GEOM class
• GEOM provider
• GEOM consumer
• sysctl kern.geom.*
• Sample for mirroring on GEOM
• File system of UNIX
  
  • Provide approches to file content via the file name
  • Tree structure with a single root
• Kernel does not necessarily need file systems
• Userland needs file systems
• UFS
  
  • default file system of FreeBSD
• Structure of UFS
  
  • inode
  • super block
  • how to approch the block content with inode
• fsck
  
  • Check where the inode is collapsed at
• SoftUpdates
  
  • Improve performance of fsck
  • Do I/O in async with strict order to add/delete block
• SoftUpdates + Jornal (SUJ)
  
  • Since FreeBSD 9.0, SoftUpdates support Journaling
  • Improve the performance more

In this day, Dr Hiroki Sato has explained about Filesystem, GEOM and UFS. I have understood what is UFS+SUJ. On next month, FreeBSD Study #10 will be held and this session will continue with the theme about ZFS.

Both FreeBSD 9.1 beta1 and PC-BSD 9.1 beta1 have been released

5 days ago, FreeBSD 9.1 beta 1 has been released. Ant then, 2 days ago, PC-BSD 9.1 beta 1 has also been released. Now I'm trying PC-BSD 9.1 beta.

Protect mass assignment for ASP.NET MVC

In Ruby on Rails, we should protect mass assignment with defining attr_protected (black list) or attr_accessible (white list) on Model like this (via Ruby on Rails Guides).

(black list)

class SomeModel
  attr_protected :admin
  ...
end

(white list)

class SomeModel
  attr_accessible :name
  ...
end

I learned from the book Programming Microsoft® ASP.NET MVC, Second Edition that we should protect mass assignment with defining attribute on argument of Action method, not on Model directly.

(black list)

[HttpPost]
public ActionResult Create([Bind(Exclude="admin")]SomeModel model)
{
    ...
}

(white list)

[HttpPost]
public ActionResult Create([Bind(Include="name")]SomeModel model)
{
    ...
}

The best advantage of this approach is to be able to define black lists or white lists in each actions.