def robotsrulesetOfDomain(self, domain):
		'''检查domain是否在数据库中,
			否 --> (False, None)
			是 --> (True, 数据库中存储的robots.txt内容)
		'''
		exist = False
		cur = self.conn.cursor()
		# 是否存在
		cur.execute("SELECT 1 FROM Domains WHERE domain=?", (domain,))
		if cur.fetchone() :
			exist = True
		# 存在的话,结果是什么
		cur.execute("SELECT rules FROM Domains,Rulesets "
			"WHERE domain=? AND Domains.did=Rulesets.did"
			,(domain,) )
		ruleset = cur.fetchone()
		return (exist, ruleset)
def post(txt, contact, parenttype=None, notify=False, subject=None):
	"""post message"""

	d = frappe.new_doc('Communication')
	d.communication_type = 'Notification' if parenttype else 'Chat'
	d.subject = subject
	d.content = txt
	d.reference_doctype = 'User'
	d.reference_name = contact
	d.sender = frappe.session.user
	d.insert(ignore_permissions=True)

	delete_notification_count_for("Messages")

	if notify and cint(notify):
		if contact==frappe.session.user:
			_notify([user.name for user in get_enabled_system_users()], txt)
		else:
			_notify(contact, txt, subject)

	return d