[Asterisk-Users] extensions and regular expressions ( probablyan easy question )

[Rushowr]

I just wanted to throw in here that I was intrigued by the question, so I
went through the "Asterisk, The Future of Telephony" book, all the notes
I've gathered, and every single link that looked even mildly promising. 
 
>From what I see, you're asking if you can use a regular expression to match
against the dialed number. You _COULD_ if you wanted to do something like
this (on ALL calls being dialed by your users)
 
exten = _X.,1,GotoIf($[${REGEX("YOUR_REGEX_HERE" ${EXTEN})} =
1]?800-in,s,1:2)
 
Easy-read format (how I design stuff before writing it fully)
 
exten = anynumber
    If the number dialed matches the regex pattern, goto the 800-in context,
at the s extension, priority 1
    Otherwise, continue on to priority 2 in this extension & context.
 
If you'd like to save a minute amount of cpu/mem/time, you can match against
10+ numbers only, using 
_XXXXXXXXXX. as the pattern to match against, which will match against any
set of numbers 10 or more digits long.
 
Hope this was somewhat helpful
 
SKM
 
________________________________

From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Sean Kennedy
Sent: Saturday, December 10, 2005 11:33 PM
To: radamson at routers.com; Asterisk Users Mailing List - Non-Commercial
Discussion
Subject: Re: [Asterisk-Users] extensions and regular expressions (
probablyan easy question )


Rich,

It's kind of tough to truly understand what you are trying to accomplish 

Ack, sorry!  It's hard to post to the list on a saturday when my 2year old
is wanting to play with the keyboard as well.  Best I can do is half a mind,
most of the time that's enough.  

Not always, however.  :)

(or ask for). Apparently you've got something more in mind that words are
making it through the list. Reading between the lines, it would appear from
the 800-in that calls are coming in from some external source, and you
trying to do something with them. Can you be a little more explicit

I have an 800 number from teliax.  When my "local" users dial it, they will
dial 1866... instead of the 866 I have in my dial plan.  I do not want the
call to use one of my external sources to terminate the call ( in essence,
dialing out via voicepulse, and recieving the call via teliax ).  I know I
can do two seperate exten patterns, but I was hoping for a single pattern.
To that end, I was wondering if there was a way of saying "Match this 0 or 1
times", something I'm used to in perl and the like.

If there isn't, there isn't.  Won't kill me to add the second exten match.

Sean

Rich Adamson wrote: 

	Or, just do... 
	exten => 18661234567,1,Goto(800-in) 
	exten => 8661234567,1,Goto(800-in) 
	
	It's kind of tough to truly understand what you are trying to
accomplish 
	(or ask for). Apparently you've got something more in mind that
words are making it through the list. Reading between the lines, it would
appear from the 800-in that calls are coming in from some external source,
and you trying to do something with them. Can you be a little more explicit.

	
	
	
	

		Hi Dan, 
		
		Thanks for the info, but what I'm after is the ability to
match a digit/character 0 or 1 times at the beginning of the string.  If I'm
reading your example right, it'll match anything starting with 866, which
doesn't work for me.  I am trying to match: 
		
		18661234567 and 8661234567 
		
		Sean 
		
		ps:  The pdf doesn't have a good explaination of this
either, although it occurs to me that this might not be possible with * if
I'm having such a hard time finding it. 
		Daniel Wright wrote: 
		
		

			Sean Kennedy wrote: 
			
			

				Hi all, 
				
				I'm having a hard time finding information
related to the regular expressions that can be used in a dialplan,
specifically as an extension.  For example, I have an 800 number which I'd
like to jump directly to if my users dial it, instead of going over my pstn
termination.  Currently, it looks like this: 
				
				exten => 8661234567,1,Goto(800-in) 
				
				However, I'd like 1866123456 to match as
well.  I can't find in the wiki or sample configs how to say "match this 0
or 1 times". 
				Can anybody provide a link that would go
over this?  Again, I've been digging through the wiki, but I seem to be
missing it. 
				
				Thanks 
				
				Sean 
				
				

			You could do it like this: 
			
			exten => _866.,1,GoTo(800-in) 
			
			The period means match one or more characters. 
			
			You can find reference to expressions and how they
work  in this pdf book
http://www.nufone.net/downloads/asteriskdocs/AsteriskTFOT.zip