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"""
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This module contains helper functions and helper classes.
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"""
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import hashlib
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import time
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from django.utils import timezone
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from neboard import settings
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KEY_CAPTCHA_FAILS = 'key_captcha_fails'
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KEY_CAPTCHA_DELAY_TIME = 'key_captcha_delay_time'
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KEY_CAPTCHA_LAST_ACTIVITY = 'key_captcha_last_activity'
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def need_include_captcha(request):
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"""
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Check if request is made by a user.
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It contains rules which check for bots.
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"""
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if not settings.ENABLE_CAPTCHA:
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return False
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enable_captcha = False
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#newcomer
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if KEY_CAPTCHA_LAST_ACTIVITY not in request.session:
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return settings.ENABLE_CAPTCHA
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last_activity = request.session[KEY_CAPTCHA_LAST_ACTIVITY]
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current_delay = int(time.time()) - last_activity
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delay_time = (request.session[KEY_CAPTCHA_DELAY_TIME]
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if KEY_CAPTCHA_DELAY_TIME in request.session
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else settings.CAPTCHA_DEFAULT_SAFE_TIME)
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if current_delay < delay_time:
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enable_captcha = True
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return enable_captcha
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def update_captcha_access(request, passed):
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"""
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Update captcha fields.
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It will reduce delay time if user passed captcha verification and
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it will increase it otherwise.
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"""
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session = request.session
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delay_time = (request.session[KEY_CAPTCHA_DELAY_TIME]
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if KEY_CAPTCHA_DELAY_TIME in request.session
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else settings.CAPTCHA_DEFAULT_SAFE_TIME)
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if passed:
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delay_time -= 2 if delay_time >= 7 else 5
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else:
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delay_time += 10
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session[KEY_CAPTCHA_LAST_ACTIVITY] = int(time.time())
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session[KEY_CAPTCHA_DELAY_TIME] = delay_time
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def get_client_ip(request):
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x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
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if x_forwarded_for:
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ip = x_forwarded_for.split(',')[-1].strip()
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else:
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ip = request.META.get('REMOTE_ADDR')
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return ip
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def datetime_to_epoch(datetime):
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return int(time.mktime(timezone.localtime(
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datetime,timezone.get_current_timezone()).timetuple())
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* 1000000 + datetime.microsecond)
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