jreupd

Table of Contents

JRE Upd

JRE Upd

use web service
client requests latest update downloads update over http
update is stored as a single jar/tar file
web service jsp based
used mysql database
updater uses OS version to determine correct update e.g.(Windows XP/Windows 7)

update dir structure

install.reg → changes to the registry merged after install (regedit -s)
jre8/jre7 plugin runtime (copied to Program Files\Java Plugin)
version.txt → contains version info
destpath.txt → intended install location

Web Service

check_update.jsp client sends OS version replies with “NULL” or update version e.g. “1.8.25a”
get_update.jsp client sends requested version either gets “NULL” or download URL.

Update Client

c# based
client knows the current plugin version
client performs a GET with a PLATFORM arg of “Windows 7” to check_update.jsp
if client gets a version that is not equal to current version it performs a GET with arg of VERSION and PLATFORM to get_update.jsp
if client gets a url client downloads update and installs it to Program Files\Java Plugin, merges install.reg, and stores version.txt in Program Files\Java Plugin

Database schema

Updates Table

update_id (int)
version(str) e.g. (1.8.25a)
supported_platforms(str) e.g. (Windows 7;Windows 8;Windows XP)
url (str)
post_date (timestamp)
seq (int)
enabled (boolean)

Users

user_id (int)
username (str)
password (str)
level (int)

jreupd.txt · Last modified: 2014/11/04 10:12 by tschulz