Ricky's Hodgepodge - Comments

ricky: Debian Multiarch

nospam@example.com (ricky) — Thu, 04 Apr 2013 10:13:40 +0200

Hi Rulet,

Usually this is a bug in the distribution packages, I suppose you're using ubuntu or any other derivatives and not debian (that's why it didn't happen to me). Try using the --force-overwrite option like I did with libqtwebkit4.

Good luck!

rulet: Debian Multiarch

nospam@example.com (rulet) — Wed, 03 Apr 2013 18:05:40 +0200

Whem trying to install libasound2:i386 it gives an error that /usr/share/alsa/alsa.conf cannot be rewritten:

r@prime:~$ sudo apt-get install libasound2:i386
Чтение списков пакетов… Готово
Построение дерева зависимостей
Чтение информации о состоянии… Готово
Предлагаемые пакеты:
libasound2-plugins:i386
НОВЫЕ пакеты, которые будут установлены:
libasound2:i386
обновлено 0, установлено 1 новых пакетов, для удаления отмечено 0 пакетов, и 0 пакетов не обновлено.
Необходимо скачать 0 B/463 kB архивов.
После данной операции, объём занятого дискового пространства возрастёт на 1.322 kB.
(Чтение базы данных … на данный момент установлено 135267 файлов и каталогов.)
Распаковывается пакет libasound2:i386 (из файла …/libasound2_1.0.25-4_i386.deb) …
dpkg: ошибка при обработке параметра /var/cache/apt/archives/libasound2_1.0.25-4_i386.deb (--unpack):
попытка перезаписать общий «/usr/share/alsa/alsa.conf», который отличается от других экземпляров пакета libasound2:i386
При обработке следующих пакетов произошли ошибки:
/var/cache/apt/archives/libasound2_1.0.25-4_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
r@prime:~$

Any ideas?

Tung Le: Introducing CalDAV (Part I)

nospam@example.com (Tung Le) — Sat, 16 Feb 2013 14:07:14 +0100

I have a set of events saved in my database (a very special database, so I can't use some popular open-source servers with, say, MySQL). Now I want to build a CalDav server (by Java) so that a user can connect his calendar client to it to retrieve or modify events. I'm new to this so have a lot of questions, hope you can point me to some directions.

1. What are the general steps?

2. Do I need to offer a servlet? If yes, then what must I return for a request? a JSON or XML or .ics file?

3. When a user subscribe to my calendar, does that mean that his client will pull my server (call the servlet) after an interval.

Thanks.

Bruno PC: Signature Applet - Using Browser Store

nospam@example.com (Bruno PC) — Sat, 22 Dec 2012 15:26:43 +0100

Thanks Ricky,
You are the guy!

This is the way.. I can see it now!
Thanks again!!!

ricky: Signature Applet - Using Browser Store

nospam@example.com (ricky) — Sat, 22 Dec 2012 15:17:02 +0100

No Bruno, a login is never done using a Java applet. The web server is configured to request user certificate, the browser (previously the user has installed one or more client certificates in it) shows a dialog to select which certificate to present and that's all. The browser is the one that does all the stuff, don't reinvent the wheel.

As I said you better check the series I wrote about this issue (they are for Java but you need to use more or less the same ideas):

http://blogs.nologin.es/rickyepoderi/index.php?/archives/46-Certificate-Security-in-JavaEE-Demo-Setup.html
http://blogs.nologin.es/rickyepoderi/index.php?/archives/47-Certificate-Security-in-JavaEE-Custom-Solution.html

In summary:

-> Configure IIS (or whatever server you use) to request client certificates.
-> Find a way to get the client certificate in .NET.
-> Use some info in the cert to map the user against you user repository (DDBB, LDAP,...).

Please, trust me. Forget about applets for logins.