On Tue, May 19, 2009 at 9:12 AM, Vladimir Klejch <klejch+freeswitch@netbox.cz> wrote:

Hi

I think i found a bug on XML preprocessor in way of working with
preprocessor varibles.

I have problem with concatenation of preprocessor variables in XML config.

Preprocessor is incorectly concatenatin two preprocessor variables, and
building wrong config xml.

Best to explain on example:

in vars.xml:

<X-PRE-PROCESS cmd="set" data="bug_test_1=xpreprocessbug1" />
<X-PRE-PROCESS cmd="set" data="bug_test_2=xpreprocessbug2" />
<X-PRE-PROCESS cmd="set" data="bug_test_3=xpreprocessbug3" />
<X-PRE-PROCESS cmd="set" data="bug_test_4=xpreprocessbug4" />

<X-PRE-PROCESS cmd="set" data="bug_test_sum1=$${bug_test_1}$${bug_test_2}$${bug_test_3}$${bug_test_4}" />
<X-PRE-PROCESS cmd="set" data="bug_test_sum2=$${bug_test_1}^$${bug_test_2}^$${bug_test_3}^$${bug_test_4}" />

then in dialplan:

<extension name="x_preprocess_bug1" continue="false" >
<condition field="destination_number" expression="$${bug_test_sum1}" >
<action application="info" />
</condition>
</extension>

<extension name="x_preprocess_bug2" continue="false" >
<condition field="destination_number" expression="$${bug_test_sum2}" >
<action application="info" />
</condition>
</extension>

but in freeswitch.xml.fsxml:

<extension name="x_preprocess_bug1" continue="false" >
<condition field="destination_number" expression="xpreprocessbug1$%{bug_test_2}xpreprocessbug3$%{bug_test_4}" >
<action application="info" />
</condition>
</extension>

<extension name="x_preprocess_bug2" continue="false" >
<condition field="destination_number" expression="xpreprocessbug1^xpreprocessbug2^xpreprocessbug3^xpreprocessbug4" >
<action application="info" />
</condition>
</extension>

The odd variables are wrong translated by preprocessor . The odd variable
used as $${var} is translated corect to his content, but the even variable
used as $${var} is mangled and in freeswitch.xml.fsxml is to seen %${var}
form of prefious $${var}. This problem only ocur, if tvo variables are
direcly concatenated w/o any char between them.

config :

<X-PRE-PROCESS cmd="set" data="bug_test_sum1=$${bug_test_1}$${bug_test_2}$${bug_test_3}$${bug_test_4}" />

is translated to string:

"xpreprocessbug1$%{bug_test_2}xpreprocessbug3$%{bug_test_4}" , to see in
extension name="x_preprocess_bug1".

If there is a char between concatenated variables (in my test a ^ char),
everything is OK, to see in extension name="x_preprocess_bug2".

It's this known problem or I'm wrong understanding preprocessor usage ??

Thanks
Kleo

--
kleo+freeswitch@netbox.cz

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