[Freeswitch-users] Run a LUA script when voicemail received

[Steven Schoch]

In browsing through the source to mod_curl, I found an option that allows
me to use curl without invoking a shell. I made some minor changes to the
script, changing the url to this:

url = "https://user:password@api.flowroute.com/v2/messages"

... adding some escaping after the message is composed...

message = message .. "."
-- Add JSON string escapes to the message
message = string.gsub(message, "([\\\"'])", "\\%1")

...and using the mod_curl API call to send the text to Flowroute:

api:execute("curl", url .. " content-type application/json post '" .. data
.. "'")

Works, easy, efficient.

-- 
Steve


On Thu, Jun 2, 2016 at 3:26 PM, Steven Schoch <
schoch+freeswitch.org at xwin32.com> wrote:

> I got it working! The goal was to run a script to inform users via a text
> message when they get a voicemail.
> This script looks for a "vm-notify-sms" param in the user's directory
> information. It sends the text from user's outbound caller-ID number, which
> is set in the standard FS configuration. I'm using the SMS API from
> Flowroute.com.
>
> --[[ This script is called by configuration in
> autoload_configs/lua.conf.xml.
>      It is called on a "vm:maintenance" event.
> ]]
>
> -- The following is specifc to the Flowroute SMS API,
> -- documented at https://developer.flowroute.com/docs/messaging
> url = "https://api.flowroute.com/v2/messages"
> authentication = "user:password"
>
> action = event:getHeader("VM-Action")
> if action ~= "leave-message" then return end
> user = event:getHeader("VM-User")
> domain = event:getHeader("VM-Domain")
> caller_id_name = event:getHeader("VM-Caller-ID-Name")
> caller_id_number = event:getHeader("VM-Caller-ID-Number")
> --[[ We don't care about these:
> file_path = event:getHeader("VM-File-Path")
> flags = event:getHeader("VM-Flags")
> folder = event:getHeader("VM-Folder")
> uuid = event:getHeader("VM-UUID")
> --]]
> message_len = event:getHeader("VM-Message-Len")
> timestamp = event:getHeader("VM-Timestamp")
> api = freeswitch.API();
> from = api:execute("user_data", user .. "@" .. domain ..  " var
> outbound_caller_id_number")
> to = api:execute("user_data", user .. "@" .. domain .. " param
> vm-notify-sms")
> if to == "" then return end
>
> if caller_id_name == ''
>         or caller_id_name == 'UNKNOWN'
>         or caller_id_name == 'UNASSIGNED'
>         or caller_id_name == 'WIRELESS CALLER'
>         or caller_id_name == 'TOLL FREE CALL'
>         or caller_id_name == 'Anonymous'
>         or caller_id_name == 'Unavailable'
>         then caller_id_name = nil end
> if caller_id_number == ''
>         then caller_id_number = nil end
> message = "Voicemail "
> if caller_id_name
>         then message = message .. "from " .. caller_id_name .. " (" ..
>  caller_id_number .. ")"
>         elseif caller_id_number
>         then message = message .. "from " .. caller_id_number end
> message = message .. " at " .. os.date("%I:%M %p", timestamp)
> message = message .. " length " .. message_len .. " seconds"
> message = message .. " to box " .. user
> message = message .. "."
> -- Blindly send the text
> data = '{ "to": "' .. to .. '", "from": "' .. from .. '", "body": "' ..
> message .. '"}'
> --[[
>      Until either Freeswitch has the ability to pass authentication data
>      to the mod_curl API (FS-9223), or the Flowroute API has the ability
>      to take authentication data in the POST body (they are working on it),
>      we are forced to spawn a shell to use the curl from our OS.
> ]]
> -- api.execute("curl", url .. " auth " .. authentication .. " post " ..
> data)
> os.execute("curl -u " .. authentication .. " -H 'Content-Type:
> application/json' -X POST -d '" .. data .. "' "  .. url)
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20160616/82307ebd/attachment.html