def delete_status(uid, status_id):
key = 'status:%s' % status_id
with Lock(key) as lock:
if not lock:
return False
status = Status.load(status_id=status_id)
if not status or status.user_id != uid:
return False
status_db = redis_mapping.get_db('status')
pipeline = status_db.pipeline()
data = status.to_json()
data['deleted'] = True
pipeline.publish('streaming:status:', json.dump(data))
pipeline.zrem('profile:%s' % uid, status_id)
pipeline.zrem('home:%s' % uid, status_id)
pipeline.execute()
user_db = redis_mapping.get_db('session')
user_db.hincrby('user:%s' % uid, 'posts', -1)
Status.remove_one({'status_id': status_id})
return True
def follow_user(uid, other_uid):
redis_db = redis_mapping.get_db('status')
fkey1 = 'followings:%s' % uid
fkey2 = 'followers:%s' % other_uid
if redis_db.zscore(fkey1, other_uid):
return False
now = int(time.time())
pipeline = redis_db.pipeline()
pipeline.zadd(fkey1, {other_uid: now})
pipeline.zadd(fkey2, {uid: now})
pipeline.zrevrange('profile:%s' % other_uid,
0,
STATUS_HOME_TIMELINE_SIZE - 1,
withscores=True)
followings, followers, status_and_score = pipeline.execute()[-3:]
if status_and_score:
pipeline.zadd('home:%s' % uid, dict(status_and_score))
pipeline.zremrangebyrank('home:%s' % uid, 0,
-STATUS_HOME_TIMELINE_SIZE - 1)
pipeline.execute()
user_db = redis_mapping.get_db('session')
pipeline = user_db.pipeline()
pipeline.hincrby('user:%s' % uid, 'followings', int(followings))
pipeline.hincrby('user:%s' % other_uid, 'followers', int(followers))
pipeline.execute()
return True
def create_status(content, user_id):
user = User.load(user_id=user_id)
if not user:
return None
status_id = gen_status_id()
now = datetime.now()
status = Status()
status.status_id = status_id
status.content = content
status.user_id = user_id
status.nickname = user.nickname
status.create_time = now
status.publish_status = PublishStatus.INIT.value
status.save_new()
status_db = redis_mapping.get_db('status')
status_db.publish('streaming:status:', json.dumps(status.to_json()))
user_db = redis_mapping.get_db('session')
user_db.hincrby('user:%s' % user_id, 'posts')
# 处理 redis 记录
return status
def unfollow_user(uid, other_uid):
redis_db = redis_mapping.get_db('status')
fkey1 = 'followings:%s' % uid
fkey2 = 'followers:%s' % other_uid
if not redis_db.zscore(fkey1, other_uid):
return False
pipeline = redis_db.pipeline()
pipeline.zrem(fkey1, other_uid)
pipeline.zrem(fkey2, uid)
pipeline.zrevrange('profile:%s' % other_uid, 0,
STATUS_HOME_TIMELINE_SIZE - 1)
followings, followers, status = pipeline.execute()[-3:]
if status:
pipeline.zrem('home:%s' % uid, *status)
pipeline.execute()
user_db = redis_mapping.get_db('session')
pipeline = user_db.pipeline()
pipeline.hincrby('user:%s' % uid, 'followings', -abs(followings))
pipeline.hincrby('user:%s' % other_uid, 'followers', -abs(followers))
pipeline.execute()
return True
def create_user(username, pwd_md5, nickname):
"""创建新用户"""
key = 'user:'******'session')
user_db.hmset(
'user:%s' % user_id, {
'user_id': user_id,
'nickname': nickname,
'followers': 0,
'followings': 0,
'posts': 0,
'login': datetime.timestamp(now)
})
return user
def filter_content(user_id, filter_type, arg, quit):
"""过滤内容，推荐内容"""
redis_db = redis_mapping.get_db('status')
match = create_filters(user_id, filter_type, arg)
pubsub = redis_db.pubsub()
pubsub.subscribe(['streaming:status:'])
for item in pubsub.listen():
message = item['data']
decoded = json.loads(message)
if match(decoded):
if decoded.get('deleted'):
yield json.dumps({
'status_id': decoded['status_id'],
'deleted': True
})
else:
yield message
if quit[0]:
break
pubsub.reset()
def syndicate_status(uid, status_id, timestamp, start=0):
redis_db = redis_mapping.get_db('status')
followers = redis_db.zrangebyscore('followers:%s' % uid,
start,
'inf',
start=0,
num=POST_PER_PASS)
pipeline = redis_db.pipeline()
for follower in followers:
pipeline.zadd('home:' + follower, {status_id: timestamp})
pipeline.zremrangebyrank('home:' + follower, 0,
-STATUS_HOME_TIMELINE_SIZE - 1)
pipeline.execute()
# 自己的主页
pipeline.zadd('home:%s' % uid, {status_id: timestamp})
pipeline.zremrangebyrank('home:%s' % uid, 0,
-STATUS_HOME_TIMELINE_SIZE - 1)
pipeline.execute()
# TODO 延迟同步
return True
def post_status(uid, content, **data):
status = create_status(content, uid)
if not status:
return None
now = datetime.timestamp(status.create_time)
redis_db = redis_mapping.get_db('status')
pipeline = redis_db.pipeline()
pipeline.zadd('profile:%s' % uid, {status.status_id: now})
syndicate_status(uid, status.status_id, now)
return True
def logout_user(token: str):
"""用户注销"""
key = 'user:logout:' + token
with Lock(key) as lock:
if not lock:
return False
redis_db = redis_mapping.get_db('session')
user_key = SESSION_USER_KEY.format(token=token)
user_id = redis_db.get(user_key)
if not user_id:
return False
token_key = SESSION_TOKEN_KEY.format(user_id=user_id)
pipeline = redis_db.pipeline()
pipeline.delete(user_key)
pipeline.delete(token_key)
pipeline.execute()
return True
def login_user(user: User):
"""用户登录"""
redis_db = redis_mapping.get_db('session')
user.login_time = datetime.now()
user.update()
token = get_random_str()
pipeline = redis_db.pipeline()
user_key = SESSION_USER_KEY.format(token=token)
pipeline.set(user_key, user.user_id, ex=config.SESSION_EXPIRE_TIME)
token_key = SESSION_TOKEN_KEY.format(user_id=user.user_id)
pipeline.set(token_key, token, ex=config.SESSION_EXPIRE_TIME)
pipeline.zadd(SESSION_RECENT_ZKEY, {user.user_id: int(time.time())})
# 清理登录状态，可以单独起一个程序清理，否则每秒执行次数太多
pipeline.zremrangebyrank(SESSION_RECENT_ZKEY, 0, -1000)
pipeline.execute()
return token
def get_status_contents(user_id, timeline='home', page=1, count=30):
"""获取时间线的状态消息列表"""
redis_db = redis_mapping.get_db('status')
pipeline = redis_db.pipeline()
pipeline.zrevrange('%s:%s' % (timeline, user_id), (page - 1) * count,
page * count - 1)
pipeline.zcount('%s:%s' % (timeline, user_id), 0, 'inf')
statuses, total = pipeline.execute()[-2:]
statuses = list(map(int, statuses))
query_dict = {'status_id': {'$in': statuses}}
sort = ['-create_time']
items = []
for status in Status.query(query_dict, sort):
items.append({
'status_id': status['status_id'],
'content': status['content'],
'user_id': status['user_id'],
'create_time': status['create_time']
})
return {'total': total, 'items': items, 'page': page, 'count': count}
def __init__(self, key, timeout=10):
self.db = redis_mapping.get_db('lock')
self.timeout = timeout
self.key = key
self.lock = None
def gen_user_id():
"""自增生成新的用户id"""
redis_db = redis_mapping.get_db('counter')
return int(redis_db.incr(USER_ID_COUNTER_KEY))
def check_token(token: str):
"""检查登录状态"""
redis_db = redis_mapping.get_db('session')
user_key = SESSION_USER_KEY.format(token=token)
return int(redis_db.get(user_key) or 0)
# -*- coding: utf-8 -*-
from datetime import datetime
from utils.words import tokenize
from utils.db import zunion, zintersect, union
from utils.ip import ip_to_score
from app import redis_mapping
from app.models.ad import Ad
redis_db = redis_mapping.get_db('ad')
def gen_ad_id():
key = 'counter:ad_id'
return str(redis_db.incr(key))
def get_ad(ad_id):
ad = Ad.load(ad_id=ad_id)
return ad
def add_ad(name, locations, content, type, value):
ad_id = gen_ad_id()
ad = Ad()
ad.ad_id = ad_id
ad.name = name
ad.type = type
ad.content = content
ad.locations = locations
def gen_status_id():
"""自增生成新的用户id"""
redis_db = redis_mapping.get_db('counter')
return int(redis_db.incr(STATUS_ID_COUNTER_KEY))
