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Regex and Ping
Posted: Thu Sep 18, 2014 7:47 am
by ReporterX
Newbie ABE learner
1. Must I need to use ^ sign to declare a regex URI pattern? In other words, any regex must start with ^ sign. True?
2. Could I use more than 1 method in the same rule, like what you can do with resource
3. Method: PING
A webserver can send PING request to us?
I thought PING request is sent by the user (to the webserver) to test the availability of the webserver.
What is the implication of privacy of security if I don't block it? Should we block it?
Thanks a lot.
Re: Regex and Ping
Posted: Thu Sep 18, 2014 4:29 pm
by barbaz
ReporterX wrote:1. Must I need to use ^ sign to declare a regex URI pattern? In other words, any regex must start with ^ sign. True?
yes, at least in most cases. It's best to always do that.
ReporterX wrote:2. Could I use more than 1 method in the same rule, like what you can do with resource
Yes
ReporterX wrote:3. Method: PING
A webserver can send PING request to us?
I thought PING request is sent by the user (to the webserver) to test the availability of the webserver.
What is the implication of privacy of security if I don't block it? Should we block it?
This PING is
which will send the site(s) listed in the ping attribute, a short message saying that you clicked that hyperlink.
I think it's blocked by default in the browser, so you don't need to worry about it.
Re: Regex and Ping
Posted: Thu Sep 18, 2014 6:16 pm
by ReporterX
barbaz wrote:ReporterX wrote:1. Must I need to use ^ sign to declare a regex URI pattern? In other words, any regex must start with ^ sign. True?
yes, at least in most cases. It's best to always do that.
I tested it some time ago today.
It appears NoScript fails to recognize if I don't put ^ in front of the regex pattern.
Not that you have a choice. It is required.
barbaz wrote:ReporterX wrote:3. Method: PING
A webserver can send PING request to us?
I thought PING request is sent by the user (to the webserver) to test the availability of the webserver.
What is the implication of privacy of security if I don't block it? Should we block it?
This PING is
which will send the site(s) listed in the ping attribute, a short message saying that you clicked that hyperlink.
I think it's blocked by default in the browser, so you don't need to worry about it.
I see.
Yup it seems to be. <a> ping request is ignored by default since 2008.
http://kb.mozillazine.org/Browser.send_pings
Thanks a lot.