Thanks for the Java API ref. But, I'm curious as to how or where invalid UTF-8
sequences come about; is it primarily a hacker thing? I see the Java Character API has an
isValidCodePoint() method. Do I just run each code point through that?
From: Brion Vibber <brion(a)pobox.com
To: Al Johnson <alj62888(a)yahoo.com>om>; MediaWiki announcements and site admin
Sent: Wednesday, December 26, 2012 8:40 PM
Subject: Re: [MediaWiki-l] Normalization Code
On Wed, Dec 26, 2012 at 2:20 PM, Al Johnson wrote:
I need to make sure a backend Java process is doing the same UTF normalization that is
done for edit text. Grep'ing for 'normaliz' brings up a lot and I'm not a
php dev. Can someone point me to a key php module and/or function?
The PHP code for this is in includes/normal -- luckily you shouldn't have to replicate
most of that code which is nasty and low-level.
For the most part, you want to do two things:
* make sure the input is valid UTF-8
* normalize any composition character sequences to 'normalization form C'
Reading data in from a UTF-8 input stream into a Java string should already take care of
making sure it's valid UTF-8. :) If you want to treat invalid input the same, make
sure that invalid UTF-8 sequences get converted to the 'replacement character'
U+FFFD rather than throwing an exception.
It looks like you should be able to use the java.text.Normalizer class to convert to NFC:
You might or might not prefer to use the Java version of the ICU library to do the same
thing, it might be more up to date: