Sample Regexes

Click here to expand Table of Contents

<!-- Simple regex examples for FS Conf Call -->
<include>
 
  <!-- traditional OR logic -->
  <extension name="example_01">
    <condition field="destination_number" expression="^(this|that|the_other)$>
      <action application="log" data="Someone dialed $1"/>
      <anti-action application="log" data="Something else was dialed"/>
    </condition>
  </extension>
 
  <!-- what if you wanted multiple fields in the OR logic? 
 
 IF ( caller_id_name == "Michael Collins" OR caller_id_number == 1001 ) 
 THEN { do this thing } 
 ELSE { do that other thing } 
 
 Use the new 'regex' tag 
 -->
  <extension name="example_02">
    <condition regex="any" continue="true">
      <!-- If either of these is true then the subsequent actions are added to execute list -->
      <regex field="caller_id_name" expression="Some User"/>
      <regex field="caller_id_number" expression="^1001$"/>
      <action application="log" data="INFO At least one of the conditions matched!"/>
      <!-- If *none* of the regexes is true then the anti-actions are added to the execute list -->
      <anti-action application="log" data="WARNING None of the conditions matched!"/>>                                                                          
    </condition>
  </extension>
 
  <!-- a slightly more involved example -->
  <extension name="example_03" continue="true">
    <condition regex="any" break="never">
      <regex field="caller_id_name" expression="^Michael\s*S?\s*Collins"/>
      <regex field="caller_id_number" expression="^1001|3757|2816$"/>
      <action application="set" data="calling_user=mercutioviz" inline="true"/>
      <anti-action application="set" data="calling_user=loser" inline="true"/>
    </condition>
 
    <condition>
      <action application="answer"/>
      <action application="sleep" data="500"/>
      <action application="playback" data="ivr/ivr-welcome_to_freeswitch.wav"/>
      <action application="sleep" data="500"/>
    </condition>
 
    <condition field="${calling_user}" expression="^loser$">
      <action application="playback" data="ivr/ivr-dude_you_suck.wav"/>
      <anti-action application="playback" data="ivr/ivr-dude_you_rock.wav"/>
    </condition>
  </extension>
  <!-- Just for kicks, an XOR example -->
  <extension name="example_04" continue="true">
    <condition regex="xor">
      <!-- If only one of these is true then the subsequent actions are added to execute list -->
      <regex field="caller_id_name" expression="Some User"/>
      <regex field="caller_id_number" expression="^1001$"/>
      <action application="log" data="INFO Only one of the conditions matched!"/>
      <!-- If *none* of the regexes is true then the anti-actions are added to the execute list -->
      <anti-action application="log" data="WARNING None of the conditions matched!"/>
    </condition>
  </extension>
 
  <!-- Using larger AND structures 
       bearing in mind that the dialplan executes routing logic; 
       it is not a procedural scripting language 
 IF (cond1 AND cond2 AND cond3) THEN 
 do actions 
 ELSE 
 do other actions 
 ENDIF 
 -->
  <extension name="example_05">
    <condition regex="all">
      <regex field="${sip_gateway}" expression="^${default_provider}$"/>
      <regex field="${emergency_call}" expression="^true$"/>
      <regex field="${db(select/emergency/autoanswer)}" expression="^1$"/>
 
      <!-- the following actions get executed if all regexes PASS -->
      <action application="set" data="call_timeout=60"/>
      <action application="set" data="effective_caller_id_name=${regex(${caller_id_name}|^Emerg(_.*)$|Auto%1)}"/>
      <action application="set" data="autoanswered=true"/>
      <action application="bridge" data="user/1000@${domain_name},sofia/gateway/1006_7217/${mobile_number}"/>
 
      <!-- the following anti-actions are executed if any of the regexes FAIL -->
      <anti-action application="set" data="effective_caller_id_name=${regex(${caller_id_name}|^Emerg(_.*)$|NotAuto%1)}"/>
      <anti-action application="set" data="call_timeout=30"/>
      <anti-action application="set" data="autoanswered=false"/>
      <anti-action application="bridge" data="user/1000@${domain_name},sofia/gateway/1006_7217/${mobile_number}"/>
    </condition>
  </extension>
 
 
  <!-- empty extension markup; C&P to your heart's content -->
  <extension name="example_##">
    <condition>
      <action/>
      <anti-action/>
    </condition>
  </extension>
 
</include>