asterisk cti dial with callfiles

_init_.py

from flask import *
import re
import json
import os
import tempfile
import shutil
import stat

script_dir = os.path.dirname(os.path.realpath(__file__))

app = Flask(__name__)

CALLFILE_TMPDIR = "/var/spool/asterisk/callfile-tmp"
CALLFILE_ACTIONDIR = "/var/spool/asterisk/outgoing/"

@app.route('/dial', methods = ['GET'])
def dial():
    # sanitize input first
    number = request.args.get('number', type = str)

    number = number.replace("/", "")
    number = number.replace("-", "")
    number = number.replace(".", "")
    number = number.replace(" ", "")
    number = number.replace("(", "")
    number = number.replace(")", "")
    
    if re.fullmatch(r"^\+?[0-9]{2,}$", number) is None:
        return render_template("result_error.html",errmsg='Illegal number')

    extension = request.args.get('extension', type = str)
    
    callfile_data = render_template("callfile", extension=extension, number=number)
    
    with tempfile.NamedTemporaryFile(dir=CALLFILE_TMPDIR,prefix="cti_call.",delete=False) as fp:
        fp.write(callfile_data.encode("UTF-8"))
        fp.close()
        shutil.chown(fp.name,group="asterisk")
        os.chmod(fp.name,stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IWGRP | stat.S_IROTH)
        os.rename(fp.name, os.path.join(CALLFILE_ACTIONDIR,os.path.basename(fp.name)))

    return render_template("success_close.html")

callfile

Channel: Channel: PJSIP/{{ extension }}
Callerid: "CTI-Call" <{{ number }}@localhost>
Extension: {{ number }}
Context: from-internal
WaitTime: 10