Automatic Logging In to Plesk

Automatic logging in to Plesk is especially useful for integration
purposes, so that customers who have logged in to some other system
could access Plesk without having to log in for the second time.

The recommended way to implement automatic logging in is to redirect
users to a one-time use URL that contains a session token. To generate a
session token for a specified user, you should run an XML API request
that uses the create_session operation of the server operator.

An example of the request:

<packet version="1.6.3.3">
  <server>
    <create_session>
      <login>admin</login>
      <data>
        <user_ip>MTAuNTAuMS43MQ==</user_ip>
        <source_server></source_server>
      </data>
    </create_session>
  </server>
</packet>

The login parameter specifies the Plesk user for whom you need to
create a session. The user-ip parameter is an IP address of the
user, encoded using base64 algorithm.

An example of the response:

<packet version="1.6.3.3">
  <server>
    <create_session>
      <result>
        <status>ok</status>
        <id>ede520d0fc93ae7aa0524076d631fba2</id>
      </result>
    </create_session>
 </server>
</packet>

Plesk creates a session token for the specified user. It is contained in
the id tag (ede520d0fc93ae7aa0524076d631fba2 in the example).

The generated session token can be used in scripts: a script redirects
the user’s browser to rsession_init.php, and…