[squid-dev] [PATCH] Note ACL substrings matching

[Christos Tsantilas]

There are several use cases where an annotation may contain a list of 
values for a single key. Today it is only possible to match the full 
annotation value.

This patch investigates the -m flag which can be used to enable 
delimiter separated substrings matching on annotations:

    acl aclname note [-m[=delimiters]] name value ...

The '-m' flag by default matches comma separated substrings. The 
optional  "delimiters" parameter is a list of non-alphanumeric 
characters, which can be used as alternate delimiters.

E.g. if an external ACL sets an annotation like:
    "applications=http,facebook,facebook-chat"
the following ACLs can be used to block access to certain applications:

acl fb_chat      note -m applications facebook-chat
acl db_upload    note -m  applications dropbox-upload
http_access      deny fb_chat
http_access      deny db_upload

This is a Measurement Factory project
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