def api_register(*, email, name, passwd):
    if not name or not name.strip():
        raise APIValueError('name')
    if not email or not _RE_EMAIL.match(email):
        raise APIValueError('email')
    if not passwd or not _RE_SHA1.match(passwd):
        raise APIValueError('passwd')
    users = yield from User.findAll('email=?', [email])
    if len(users) > 0:
        raise APIError('register:failed', 'email', 'Email is already in use.')
    uid = next_id()
    sha1_passwd = '%s:%s' % (uid, passwd)
    user = User(id=uid, name=name.strip(), email=email, passwd=hashlib.sha1(sha1_passwd.encode('utf-8')).hexdigest(), groups='001449655503983177fbe60d9744c9d99c77ed1a7612acd000')
    yield from user.save()
    r = web.Response()
    r.set_cookie(COOKIE_NAME, user2cookie(user, MAX_AGE), max_age=MAX_AGE, httponly=True)
    user.passwd = '******'
    r.content_type = 'application/json'
    r.body = json.dumps(user, ensure_ascii=False).encode('utf-8')
    return(r)
def authenticate(*, email, passwd):
    if not email:
        raise APIValueError('email', 'Invalid email.')
    if not passwd:
        raise APIValueError('passwd', 'Invalid password.')
    users = yield from User.findAll('email=?', [email])
    if len(users) == 0:
        raise APIValueError('email', 'Email not exist.')
    user = users[0]
    sha1 = hashlib.sha1()
    sha1.update(user.id.encode('utf-8'))
    sha1.update(b':')
    sha1.update(passwd.encode('utf-8'))
    if user.passwd != sha1.hexdigest():
        raise APIValueError('passwd', 'Invalid password.')
    r = web.Response()
    r.set_cookie(COOKIE_NAME, user2cookie(user, MAX_AGE), max_age=MAX_AGE, httponly=True)
    user.passwd = '******'
    r.content_type = 'application/json'
    r.body = json.dumps(user, ensure_ascii=False).encode('utf-8')
    return(r)