Android Smart Updates is an Open Source library that make patch way update(using bsdiff) in android easily.
And server is base on Ruby on Rails.
Link to library source code AndroidSmartUpdates

Demo link

1. install the rails 3.2.13 and ruby 2.0
2. exec these command in terminal

$ cd your_application_root_path
$ bundle install
$ rake db:migrate
$ cd lib/differ/c_code
$ ruby extconf.rb
$ make

if tips that "bzlib.h" is not existed, you need to install bzip2 develop package by your self.
for example, in CentOS:

yum install bzip2-devel

exec

$ rails s

in the application root path.

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