Hi,
I need to modify the Freeswitch default context generated by sipXconfig
to include a line that is going to assist in entering conferences
without being prompted by a PIN. Ultimately, I want the generated
output to contain a line of the form:
<action application="set" data="supplied_pin=${sip_h_X-ConfPin}"/>
I thought that doing this would be a simple matter of modifying the
.../neoconf/etc/freeswitch/default_context.xml.vm to include that line
until I realized that the line I want ot add contains a
"${sip_h_X-ConfPin}" string which collides with the syntax that Velocity
employs for variables. For the reference, "${sip_h_X-ConfPin}" is a
construct that is useful to freeswitch and therefore needs to appear
verbatim in the generated output.
I started looking at character escaping in Velocity and saw that the '\'
is used for escaping reserved characters. In that spirit, I modified
the default_context.xml.vm file to include the following line:
<action application="set"
data="supplied_pin=\$\{sip_h_X-ConfPin\}"/>
...but to my surprise, the generated output didn't escape anything:
<action application="set"
data="supplied_pin=\$\{sip_h_X-ConfPin\}"/>
I then took out all escaping in the default_context.xml.vm and was left
with the following line:
<action application="set" data="supplied_pin=${sip_h_X-ConfPin}"/>
...and to my surprise, the generated output was exactly what I need:
<action application="set" data="supplied_pin=${sip_h_X-ConfPin}"/>
After consulting with Huijun, the best exaplaination is that Velocity
didn't see ${sip_h_X-ConfPin} as a defined variable for the context and
therefore left it unsustituted. Although this is producing the output I
ultimately want, I have a feeling that this is not the best way to
achieve this for a person 'skilled in the art' and is why I'm turning to
the list. What is the correct way of creating a Velocity template such
the the generated output will be <action application="set"
data="supplied_pin=${sip_h_X-ConfPin}"/>?
Thanks in advance,
bob
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