There is a great collection of “loading…” spinner GIF images at http://www.loadinfo.net/ such as this:
Crucially, you can also generate your own spinners, with settings for back- and foreground colours and transparency.
How to encrypt passwords in the Tomcat server.xml file
By default, Tomcat stores passwords in server.xml in clear text, which can lead to obvious security lapses.
The easiest way to mitigate against user account compromise is to use a password digest (SHA, MD2 or MD5 are supported).
With $CATALINA_HOME/lib/catalina.jar and $CATALINA_HOME/bin/tomcat-juli.jar on your class path, just use the following to generate the digested passwords:
java org.apache.catalina.realm.RealmBase \
-a {algorithm} {cleartext-password}
The digest technique works by having the incoming clear text password (as entered by the user) digested, and the results compared to the stored digested password. If the Two digests match, the password entered by the user must be correct, and the authenticate() method of the Realm succeeds.
Burn ISO images to CD in Windows XP
There are some curious anomalies when it comes to writing CDs/DVDs in Windows XP, and one of these is the lack of inbuilt support for writing ISO images to CD.
However, Alex Feinman has an ISO Recorder V2 for Windows XP SP2/SP3, which even comes recommended by Microsoft.
Petri has more information, including use of CDBurn.exe from the Windows 2003 resource kit, and the screenshots of ISO Recorder V2 (above).
If you just need to use an ISO image (without burning a CD), then software such Daemon Tools or Alcohol 120will mount ISOs as virtual drives.
Default values skew data
In Raymond Chen’s brilliantly diverse blog The Old New Thing, he asks:
Why are so many fake LiveJournal blogs written by 29-year-olds?
The answer probably lies in default values for datetime variables: January 1, 1980 is the “year zero” for DOS date/time values, and – lo and behold – anyone born on that date is 29 years old in 2009.
LightWindow – an excellent LightBox implementation
LightWindow is perhaps one of the best of the LightBox-type implementations around, supporting almost every media type currently in use.
I found a few gotchas, but these were very minor:
- needs XHTML pages with correct DOCTYPE for it work in IE
- Might need to edit lightwindow.js to correct the hardcoded paths to the skin elements
- Replace the first line with the second in the HTML HEAD:
You can grab the files here: http://www.stickmanlabs.com/lightwindow/lightwindow.zip
Matthew Skelton 