On Thu, Apr 21, 2011 at 10:41 AM, Boris Kovalenko <boris@tagnet.ru> wrote:

No success. I use it with string.match function, is it right?

Okay, this is a limitation in Lua's pattern matching. Evidently you cannot use ? on a group like you can in PCRE. So in this case you can use an API call to regex. I wrote a mini test script to demonstrate.

Have fun. :)

-MC

-- pattern.lua

-- Simple Lua pattern testing

api = freeswitch.API();

str_pattern = "(3435)230%d%d%d";

my_str = "73435230111"

str_regex = "^(7?3435)?230\\d\\d\\d$";

res = api:execute("regex",my_str .. "|" .. str_regex);

stream:write("string: " .. my_str .. ", regex result: " .. res .. "\n");

my_str = "3435230111";

res = api:execute("regex",my_str .. "|" .. str_regex);

stream:write("string: " .. my_str .. ", regex result: " .. res .. "\n");

my_str = "230111";

res = api:execute("regex",my_str .. "|" .. str_regex);

stream:write("string: " .. my_str .. ", regex result: " .. res .. "\n");

my_str = "987230111";

res = api:execute("regex",my_str .. "|" .. str_regex);

stream:write("string: " .. my_str .. ", regex result: " .. res .. "\n");

Output:

freeswitch@internal> lua pattern.lua

string: 73435230111, regex result: true

string: 3435230111, regex result: true

string: 230111, regex result: true

string: 987230111, regex result: false