[Freeswitch-dev] Conference CDRs via http

Anthony Minessale anthony.minessale at gmail.com
Tue Jun 12 06:31:57 MSD 2012

B is the right choice.
The size of the body has no limit.

How bout, if a certian header exists in the event with a local file path,
then the the mod opens the referenced file for delivery; Otherwise it uses
the body if it exists.
 On Jun 11, 2012 8:39 PM, "Mariusz Czulada" <manieq at wp.eu> wrote:

> Hi all,
> I was thinking about sending CDRs via HTTP in a same or similar way
> mod_xml_cdr does. I consider implementing this (unless someone else is
> working on it) but first wanted to discuss with you the best approach.
> A. All in mod_conference
> This would require to copy many fragments of code from mod_xml_cdr into
> mod_conference. Also same configuration parameters used in xml_cdr must be
> processed and used for sending data. The advantage for this solution is
> that everything related to this mechanism is included in this module.
> Drawback: if something in mod_xml_cdr requires fixing or extending,
> probably the same changes should by applied in related parts of
> mod_conference.
> B. mod_conference builds, mod_xml_cdr sends data
> For this solution I'll give more details.
> 1. New event type should be added (like SWITCH_EVENT_CDR)
> 2. When a module (in this case: mod_conference) wants to store CDR via
> HTTP it must fire an event of that type and:
> - "Event-Subclass" set (like "conference")
> - Only common headers are needed, plus...
> - "Content-Type" and "Content-Length" must be set
> - CDR data must be build as XML in a module and added as an event content.
> 3. mod_xml_cdr will listen to this event type.
> 4. For each event subclass which mod_xml_cdr must must react,
> configuration file will contain a set of params same as for generic channel
> CDRs.
> 5. If subclass matches configuration, mod_xml_cdr reads data from event
> content and sends them according to configuration.
> Changes in mod_conference:
> - one new parameter for each profile (like "cdr-via-event=yes|no")
> - if "yes" then xml must be build even if "cdr-log-dir" is unset
> - if "yes", then an event must be fired as described above
> Changes in mod_xml_cdr:
> - extra parameters from configuration to be parsed (like '<settings
> subclass="conference">....</settings>')
> - bind to SWITCH_EVENT_CDR
> - if 'Event-Subclass' matches configuration, a content of the event will
> be sent via HTTP (probably most of 'my_on_report' routine bellow 'try to
> post it to the web server' comment will be reused)
> A [small] drawback is that it makes an indirect module dependency, but we
> already have such situations (like mod_shout needed to record a conference
> in mp3).
> Advantages are:
> - one can create an external tool for handling this type of event (to
> store it directly in db or send it with other protocols)
> - this mechanism can be easily reused in other modules if needed; maybe in
> mod_callcenter, maybe in other components. No further changes in
> mod_xml_cdr should be needed.
> What is unknown to me is a maximum size of event content. Conference CDR
> XMLs can be quite big - will it be a problem to send it this way?
> I think the second solution is better and more universal but I'd like to
> hear your opinions about this case.
> Regards,
> Mariusz
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