Description

Isolate URLs excluded by a .pac script in the form of a list.

Context

In the case of an on-premise to SaaS migration, the administrator needs to import the proxy's flow exclusions. If the exclusions are indicated as a list in a GPO, then he can directly copy and paste this list. But if he uses a .pac script to indicate these exclusions and the proxy through which he must pass, then he must retrieve the excluded URLs via a tedious job of isolation and copy-paste. This KB is designed to facilitate this process, using regular expressions (known as RegEx for "regular expression").

Prerequisites

Have a proxy.pac script

Procedure

Let's take the example of this proxy.pac :

To extract all hostnames in list format with only the hostname, use this RegEx :

/(?<=host\ \=\=\=\ \ »)(.*?)(?=\ »)/gm

To apply it, go to https://regexr.com and copy the resulting list directly into the "List" tab in the second half of the screen:

Screenshot from regexr.com

Finally, to extract all excluded domain names with the dnsDomainIs comparison method, we use this RegEx :

/(?<=dnsDomainIs\(host\,\ »)(.*?)(?=\ »\))/gm

You can use regexr.com again to apply this RegEx.

You can concatenate the two lists and paste the resulting list in: Configuration > Traffic management > (Edit your .pac) > Content > Multiple editing.

Note

Don't forget to save by clicking on "Validate" then "Save and exit".