Redis之网站文章投票

Posted 2020-09-21 Sawyer Ford

直接上代码:

# python3
# -*- coding: utf-8 -*-

import redis
import time

ONE_WEEK_IN_SECONDS = 7 * 86400
# 如果一篇文章获得200个赞，那么这篇文章就是有趣的
VOTE_SCORE = 86400 / 200

def redis_init(redis):
    # article_time记录文章发布时间
    redis.zadd(‘article_time‘, article_100408=1496662197, article_100635=1496669721, article_100716=1496660089)
    # article_score记录文章得分
    redis.zadd(‘article_score‘, article_100408=1496666517, article_100635=1496670153, article_100716=1496665705)
    # voted_article_id记录编号为article_id的文章的点赞用户集合
    redis.sadd(‘voted_100408‘, ‘user_234487‘, ‘user_253378‘, ‘user_364680‘,
               ‘user_132097‘, ‘user_350917‘)
    # 用hash描述每篇文章
    article_desc = {‘title‘:‘kunlun‘, ‘link‘:‘www.kunlun.com‘, ‘poster‘:‘fengge‘, ‘time‘:1441728000, ‘votes‘:523}
    redis.hmset(‘article_100408‘, article_desc)
    article_desc = {‘title‘: ‘zhuxian‘, ‘link‘: ‘www.zhuxian.com‘, ‘poster‘: ‘xiaoding‘, ‘time‘: 1081440000, ‘votes‘: 677}
    redis.hmset(‘article_100635‘, article_desc)
    article_desc = {‘title‘: ‘soushenji‘, ‘link‘: ‘www.soushenji.com‘, ‘poster‘: ‘shuxiayehu‘,
                    ‘time‘: 1187280000, ‘votes‘: 421}
    redis.hmset(‘article_100635‘, article_desc)

def article_note(conn, user, article):
    cutoff = time.time() - ONE_WEEK_IN_SECONDS
    if conn.zscore(‘article_time‘, article) < cutoff:
        return

    article_id = article.partition(‘_‘)[-1]
    if conn.sadd(‘voted_‘ + article_id, user):
        conn.zincrby(‘article_score‘, article, VOTE_SCORE)
        conn.hincrby(article, ‘votes‘, 1)


r = redis.StrictRedis(host=‘redis_server_ip‘, port=6379, password=‘redis_passwd‘, db=0)
redis_init(r)
article_note(r,‘use_115423‘, ‘article_100408‘)

 

参考资料:

《Redis实战》