Enabling hgLogin

Introduction

To ensure the privacy of saved sessions in the UCSC Genome Browser, a user must log in to the browser before using the session manager. Prior to version 268, the UCSC Genome Browser was using the UCSC Genome Wiki website to handle the sign up, login, and logout functions for the session manager. Previously, for a mirror site to save sessions locally, the mirror site must have the sign-in function provided by a simulated or locally-installed mediawiki server.

Starting with V268, the UCSC Genome Browser introduced the hgLogin CGI to replace the genomewiki. The user management functions will be handled by the built-in hgLogin CGI together with the gbMembers table in the hgcentral database. Starting from Version V269, mirror sites can use the hgLogin CGI to handle the user management directly without mediawiki.

Backward compatibility

The hgLogin CGI is designed to maintain complete backward compatibility with the genomewiki login system:

• For current UCSC Genome Browser users, the transition from genomewiki to hgLogin is transparent. The user name, password, email address and, most importantly, all the saved sessions are preserved. The user will notice no functional change.
• The hgSession and hgLogin CGIs are designed to use the same cookies that are used by genomewiki. This design provides complete backwards compatibility to current mirror sites with sign-in function (via a simulated- or locally-installed mediawiki server). When hgLogin is not enabled, all browser functions will continue to work as before

Enabling hgLogin

Procedure to enable the hgLogin CGI on a Genome Browser mirror:

• Locate the genome browser configuration file hg.conf in your /cgi-bin/ directory.
• Add the statement login.systemName=hgLogin CGI to the hg.conf file.
• Also in the hg.conf file, change the host value in the "wiki.host" entry to point to your mirror browser host running the hgLogin CGI. The host should be in the same domain as value set in "central.domain", for example, if central.doman=.university.edu then set wiki.host=mylab.university.edu
• Since the hgLogin CGI uses the same cookies as did the genomewiki, please do not modify these two configuration parameters:

wiki.userNameCookie=wikidb_mw1_UserName       
wiki.loggedInCookie=wikidb_mw1_UserID

• Add the 4 parameters for the UI headings (browserName) and text string used in emails (login.xxxxxx) send out to the user. You should set them to appropriate local values.

To summarize, You should have the following parameters in hg.conf to enable the hgLogin

login.systemName=hgLogin CGI
wiki.host=mylab.university.edu
wiki.userNameCookie=wikidb_mw1_UserName
wiki.loggedInCookie=wikidb_mw1_UserID
login.browserName=myLab Genome Browser
login.browserAddr=http://mylab.university.edu
login.mailSignature=My Lab browser administrator
login.mailReturnAddr=browserAdministrator@mylab.university.edu

Migration to hgLogin

For current mirror sites with local sign-in function, you can replace your sign-in system with hgLogin CGI. You need to migrate the user information to gbMembers table in hgcentral first, then edit the hg.conf to enable the hgLogin.

Assuming you are migrating from mediawiki to hgLogin, here are the steps you must take:

• Understand the structure of the gbMembers table in hgcentral database. Please study the gbMembers table structure in

http://hgdownload.cse.ucsc.edu/admin/hgcentral.sql

• Create the gbMembers table in hgcentral based "REATE TABLE IF NOT EXISTS `gbMembers` (...)" statement in the hgcentral.sql.
• Find out the names of database and table used by mediawiki from the MediaWiki configuration file LocalSettings.php. Assuming the configuration has

$wgDBname           = "wikidb";
$wgDBprefix         = "mw1_";

Then, the table name "mw1_user" and database name "wikidb" are used.

• Export the user table table wikidb.user.tab using:

hgsql -e "select user_id,user_name,user_real_name,user_password,user_email,user_touched,user_email_authenticated 
     from mw1_user;"  wikidb > wikidb.user.tab

• Import the wikidb.user.tab to gbMembers by

hgsql -e "LOAD DATA LOCAL INFILE 'wikidb.user.tab' INTO TABLE gbMembers FIELDS TERMINATED BY '\t' 
     LINES TERMINATED BY '\n' IGNORE 1 LINES;" 

• Set the two status fields by:

hgsql -e "update gbMembers set passwordChangeRequired='N';" hgcentral
hgsql -e "update gbMembers set accountActivated='Y';" hgcentral

• Enable hgLogin by modifying hg.conf as described above.