{"id":163985,"date":"2024-11-05T04:04:36","date_gmt":"2024-11-04T20:04:36","guid":{"rendered":"https:\/\/server.hk\/cnblog\/163985\/"},"modified":"2024-11-05T04:04:37","modified_gmt":"2024-11-04T20:04:37","slug":"%e8%a7%a3%e9%8e%96%e9%99%90%e6%b5%81%e5%8f%af%e8%a1%8c%e8%b7%af%ef%bc%9a%e5%88%86%e4%bd%88%e5%bc%8fredis%e7%ae%97%e6%b3%95%ef%bc%88%e9%99%90%e6%b5%81%e7%ae%97%e6%b3%95%e5%88%86%e4%bd%88%e5%bc%8fredis","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/163985\/","title":{"rendered":"\u89e3\u9396\u9650\u6d41\u53ef\u884c\u8def\uff1a\u5206\u4f48\u5f0fRedis\u7b97\u6cd5\uff08\u9650\u6d41\u7b97\u6cd5\u5206\u4f48\u5f0fredis\uff09"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e9%8e%96%e9%99%90%e6%b5%81%e5%8f%af%e8%a1%8c%e8%b7%af%ef%bc%9a%e5%88%86%e4%bd%88%e5%bc%8fredis%e7%ae%97%e6%b3%95%ef%bc%88%e9%99%90%e6%b5%81%e7%ae%97%e6%b3%95%e5%88%86%e4%bd%88%e5%bc%8fredis-ySPeJzFhJK\">\u89e3\u9396\u9650\u6d41\u53ef\u884c\u8def\uff1a\u5206\u4f48\u5f0fRedis\u7b97\u6cd5\uff08\u9650\u6d41\u7b97\u6cd5\u5206\u4f48\u5f0fredis\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u7db2\u7d61\u74b0\u5883\u4e2d\uff0c\u9650\u6d41\u6280\u8853\u5df2\u6210\u70ba\u4fdd\u969c\u7cfb\u7d71\u7a69\u5b9a\u6027\u548c\u53ef\u7528\u6027\u7684\u91cd\u8981\u624b\u6bb5\u3002\u96a8\u8457\u7528\u6236\u6578\u91cf\u7684\u589e\u52a0\uff0c\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u8acb\u6c42\u6d41\u91cf\u6210\u70ba\u4e86\u958b\u767c\u8005\u9762\u81e8\u7684\u4e00\u5927\u6311\u6230\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5206\u4f48\u5f0fRedis\u7b97\u6cd5\u5728\u9650\u6d41\u4e2d\u7684\u61c9\u7528\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e9%99%90%e6%b5%81%e7%9a%84%e5%bf%85%e8%a6%81%e6%80%a7-ySPeJzFhJK\">\u9650\u6d41\u7684\u5fc5\u8981\u6027<\/h2>\n<p>\u9650\u6d41\u662f\u6307\u5c0d\u7cfb\u7d71\u8acb\u6c42\u9032\u884c\u63a7\u5236\uff0c\u4ee5\u9632\u6b62\u904e\u591a\u7684\u8acb\u6c42\u540c\u6642\u5230\u9054\uff0c\u5c0e\u81f4\u7cfb\u7d71\u904e\u8f09\u6216\u5d29\u6f70\u3002\u9650\u6d41\u7684\u4e3b\u8981\u76ee\u7684\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u4fdd\u8b77\u5f8c\u7aef\u670d\u52d9\uff0c\u907f\u514d\u56e0\u6d41\u91cf\u6fc0\u589e\u800c\u5c0e\u81f4\u7684\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<li>\u78ba\u4fdd\u516c\u5e73\u6027\uff0c\u8b93\u6240\u6709\u7528\u6236\u90fd\u80fd\u7372\u5f97\u5408\u7406\u7684\u8cc7\u6e90\u4f7f\u7528\u6b0a\u3002<\/li>\n<li>\u9632\u6b62\u60e1\u610f\u653b\u64ca\uff0c\u5982DDoS\u653b\u64ca\uff0c\u5f9e\u800c\u63d0\u9ad8\u7cfb\u7d71\u7684\u5b89\u5168\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"redis%e4%bd%9c%e7%82%ba%e9%99%90%e6%b5%81%e5%b7%a5%e5%85%b7-ySPeJzFhJK\">Redis\u4f5c\u70ba\u9650\u6d41\u5de5\u5177<\/h2>\n<p>Redis\u662f\u4e00\u7a2e\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u56e0\u5176\u5feb\u901f\u7684\u8b80\u5beb\u6027\u80fd\u548c\u8c50\u5bcc\u7684\u6578\u64da\u7d50\u69cb\u800c\u88ab\u5ee3\u6cdb\u61c9\u7528\u65bc\u9650\u6d41\u5834\u666f\u3002\u4f7f\u7528Redis\u9032\u884c\u9650\u6d41\u7684\u4e3b\u8981\u512a\u52e2\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u9ad8\u6027\u80fd\uff1aRedis\u7684\u5167\u5b58\u5b58\u5132\u7279\u6027\u4f7f\u5176\u80fd\u5920\u5feb\u901f\u8655\u7406\u5927\u91cf\u8acb\u6c42\u3002<\/li>\n<li>\u5206\u4f48\u5f0f\u652f\u6301\uff1aRedis\u53ef\u4ee5\u8f15\u9b06\u5730\u5728\u591a\u500b\u5be6\u4f8b\u4e4b\u9593\u9032\u884c\u6578\u64da\u5171\u4eab\uff0c\u9069\u5408\u5206\u4f48\u5f0f\u7cfb\u7d71\u3002<\/li>\n<li>\u7c21\u55ae\u6613\u7528\uff1aRedis\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u7d50\u69cb\u548c\u547d\u4ee4\uff0c\u65b9\u4fbf\u958b\u767c\u8005\u5be6\u73fe\u9650\u6d41\u908f\u8f2f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%88%86%e4%bd%88%e5%bc%8f%e9%99%90%e6%b5%81%e7%ae%97%e6%b3%95-ySPeJzFhJK\">\u5206\u4f48\u5f0f\u9650\u6d41\u7b97\u6cd5<\/h2>\n<p>\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u5be6\u73fe\u9650\u6d41\u7684\u6311\u6230\u5728\u65bc\u5982\u4f55\u5354\u8abf\u591a\u500b\u670d\u52d9\u5be6\u4f8b\u4e4b\u9593\u7684\u8acb\u6c42\u8a08\u6578\u3002\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u5206\u4f48\u5f0f\u9650\u6d41\u7b97\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e6%bc%8f%e6%a1%b6%e7%ae%97%e6%b3%95-ySPeJzFhJK\">1. \u6f0f\u6876\u7b97\u6cd5<\/h3>\n<p>\u6f0f\u6876\u7b97\u6cd5\u901a\u904e\u5c07\u8acb\u6c42\u653e\u5165\u4e00\u500b\u56fa\u5b9a\u5927\u5c0f\u7684\u6876\u4e2d\uff0c\u4e26\u4ee5\u56fa\u5b9a\u7684\u901f\u7387\u8655\u7406\u8acb\u6c42\u4f86\u5be6\u73fe\u9650\u6d41\u3002\u7576\u6876\u6eff\u6642\uff0c\u65b0\u7684\u8acb\u6c42\u5c07\u88ab\u4e1f\u68c4\u3002<\/p>\n<pre><code>\n# \u6f0f\u6876\u7b97\u6cd5\u793a\u4f8b\ndef leaky_bucket(requests, capacity, leak_rate):\n    bucket = 0\n    for request in requests:\n        if bucket &lt; capacity:\n            bucket += 1\n            print(&quot;Request processed&quot;)\n        else:\n            print(&quot;Request dropped&quot;)\n        bucket = max(0, bucket - leak_rate)\n<\/code><\/pre>\n<h3 id=\"2-%e4%bb%a4%e7%89%8c%e6%a1%b6%e7%ae%97%e6%b3%95-ySPeJzFhJK\">2. \u4ee4\u724c\u6876\u7b97\u6cd5<\/h3>\n<p>\u4ee4\u724c\u6876\u7b97\u6cd5\u5141\u8a31\u8acb\u6c42\u4ee5\u4e0d\u56fa\u5b9a\u7684\u901f\u7387\u9032\u5165\u7cfb\u7d71\uff0c\u4f46\u6bcf\u500b\u8acb\u6c42\u90fd\u9700\u8981\u6d88\u8017\u4e00\u500b\u4ee4\u724c\u3002\u4ee4\u724c\u4ee5\u56fa\u5b9a\u901f\u7387\u751f\u6210\uff0c\u7576\u4ee4\u724c\u7528\u5b8c\u6642\uff0c\u8acb\u6c42\u5c07\u88ab\u62d2\u7d55\u3002<\/p>\n<pre><code>\n# \u4ee4\u724c\u6876\u7b97\u6cd5\u793a\u4f8b\nimport time\n\nclass TokenBucket:\n    def __init__(self, capacity, refill_rate):\n        self.capacity = capacity\n        self.tokens = capacity\n        self.refill_rate = refill_rate\n        self.last_refill = time.time()\n\n    def get_token(self):\n        now = time.time()\n        self.tokens += (now - self.last_refill) * self.refill_rate\n        self.tokens = min(self.tokens, self.capacity)\n        self.last_refill = now\n\n        if self.tokens &gt;= 1:\n            self.tokens -= 1\n            return True\n        return False\n<\/code><\/pre>\n<h3 id=\"3-redis%e5%af%a6%e7%8f%be%e9%99%90%e6%b5%81-ySPeJzFhJK\">3. Redis\u5be6\u73fe\u9650\u6d41<\/h3>\n<p>\u4f7f\u7528Redis\u5be6\u73fe\u9650\u6d41\u7684\u57fa\u672c\u601d\u8def\u662f\u5229\u7528Redis\u7684\u539f\u5b50\u64cd\u4f5c\u4f86\u8a08\u6578\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684Redis\u9650\u6d41\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nimport redis\nimport time\n\nr = redis.Redis()\n\ndef rate_limiter(user_id, limit, period):\n    current_time = int(time.time())\n    key = f\"rate_limit:{user_id}:{current_time \/\/ period}\"\n    \n    # \u4f7f\u7528Redis\u7684INCR\u547d\u4ee4\u9032\u884c\u539f\u5b50\u8a08\u6578\n    current_count = r.incr(key)\n    \n    if current_count == 1:\n        r.expire(key, period)  # \u8a2d\u7f6e\u904e\u671f\u6642\u9593\n    \n    return current_count &lt;= limit\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-ySPeJzFhJK\">\u7d50\u8ad6<\/h2>\n<p>\u5206\u4f48\u5f0fRedis\u7b97\u6cd5\u5728\u9650\u6d41\u65b9\u9762\u63d0\u4f9b\u4e86\u4e00\u7a2e\u9ad8\u6548\u4e14\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u5408\u7406\u7684\u7b97\u6cd5\u9078\u64c7\u548cRedis\u7684\u5f37\u5927\u529f\u80fd\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u7cfb\u7d71\u6d41\u91cf\uff0c\u4fdd\u969c\u670d\u52d9\u7684\u7a69\u5b9a\u6027\u548c\u5b89\u5168\u6027\u3002\u96a8\u8457\u6280\u8853\u7684\u767c\u5c55\uff0c\u9650\u6d41\u6280\u8853\u5c07\u5728\u672a\u4f86\u7684\u61c9\u7528\u4e2d\u626e\u6f14\u8d8a\u4f86\u8d8a\u91cd\u8981\u7684\u89d2\u8272\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u65bc<em><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/em>\u548c<em><a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a><\/em>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5206\u4f48\u5f0fRedis\u7b97\u6cd5\u5728\u9650\u6d41\u4e2d\u7684\u61c9\u7528\uff0c\u89e3\u9396\u9ad8\u6548\u80fd\u7684\u6d41\u91cf\u63a7\u5236\u89e3\u6c7a\u65b9\u6848\uff0c\u63d0\u5347\u7cfb\u7d71\u7a69\u5b9a\u6027\u8207\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-163985","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163985","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=163985"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163985\/revisions"}],"predecessor-version":[{"id":163986,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163985\/revisions\/163986"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=163985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=163985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=163985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}