{"id":161803,"date":"2024-11-04T09:28:29","date_gmt":"2024-11-04T01:28:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/161803\/"},"modified":"2024-11-04T09:28:30","modified_gmt":"2024-11-04T01:28:30","slug":"%e6%a5%b5%e9%80%9f%e7%a7%92%e6%ae%ba-redis-%e7%b5%a6%e4%bd%a0%e5%bf%ab%e6%a8%82%e7%9a%84%e9%9f%bf%e6%87%89%ef%bc%88%e7%a7%92%e6%ae%ba-redis-%e8%a8%ad%e8%a8%88%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/161803\/","title":{"rendered":"\u6975\u901f\u79d2\u6bba Redis \u7d66\u4f60\u5feb\u6a02\u7684\u97ff\u61c9\uff08\u79d2\u6bba redis \u8a2d\u8a08\uff09"},"content":{"rendered":"<h1 id=\"%e6%a5%b5%e9%80%9f%e7%a7%92%e6%ae%ba-redis-%e7%b5%a6%e4%bd%a0%e5%bf%ab%e6%a8%82%e7%9a%84%e9%9f%bf%e6%87%89%ef%bc%88%e7%a7%92%e6%ae%ba-redis-%e8%a8%ad%e8%a8%88%ef%bc%89-yQVomLcPvU\">\u6975\u901f\u79d2\u6bba Redis \u7d66\u4f60\u5feb\u6a02\u7684\u97ff\u61c9\uff08\u79d2\u6bba redis \u8a2d\u8a08\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u7db2\u7d61\u74b0\u5883\u4e2d\uff0c\u5feb\u901f\u7684\u6578\u64da\u97ff\u61c9\u5c0d\u65bc\u4efb\u4f55\u4e00\u500b\u61c9\u7528\u7a0b\u5e8f\u7684\u6210\u529f\u81f3\u95dc\u91cd\u8981\u3002\u7279\u5225\u662f\u5728\u96fb\u5b50\u5546\u52d9\u5e73\u53f0\u4e0a\uff0c\u79d2\u6bba\u6d3b\u52d5\u7684\u6d41\u884c\u4f7f\u5f97\u7cfb\u7d71\u7684\u6027\u80fd\u9700\u6c42\u8b8a\u5f97\u66f4\u52a0\u8feb\u5207\u3002Redis \u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u56e0\u5176\u5353\u8d8a\u7684\u6027\u80fd\u548c\u9748\u6d3b\u7684\u6578\u64da\u7d50\u69cb\uff0c\u6210\u70ba\u4e86\u8a31\u591a\u958b\u767c\u8005\u7684\u9996\u9078\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528 Redis \u8a2d\u8a08\u4e00\u500b\u9ad8\u6548\u7684\u79d2\u6bba\u7cfb\u7d71\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"redis-%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%89%b9%e6%80%a7-yQVomLcPvU\">Redis \u7684\u57fa\u672c\u7279\u6027<\/h2>\n<p>Redis \u662f\u4e00\u500b\u958b\u6e90\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5177\u6709\u4ee5\u4e0b\u5e7e\u500b\u986f\u8457\u7279\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u9ad8\u6027\u80fd\uff1a<\/strong>Redis \u53ef\u4ee5\u6bcf\u79d2\u8655\u7406\u6578\u5341\u842c\u6b21\u7684\u8b80\u5beb\u64cd\u4f5c\uff0c\u9019\u4f7f\u5f97\u5b83\u975e\u5e38\u9069\u5408\u9700\u8981\u5feb\u901f\u97ff\u61c9\u7684\u61c9\u7528\u5834\u666f\u3002<\/li>\n<li><strong>\u6301\u4e45\u5316\uff1a<\/strong>\u96d6\u7136 Redis \u662f\u4e00\u500b\u5167\u5b58\u6578\u64da\u5eab\uff0c\u4f46\u5b83\u652f\u6301\u5c07\u6578\u64da\u6301\u4e45\u5316\u5230\u78c1\u789f\uff0c\u78ba\u4fdd\u6578\u64da\u4e0d\u6703\u56e0\u70ba\u7cfb\u7d71\u5d29\u6f70\u800c\u4e1f\u5931\u3002<\/li>\n<li><strong>\u8c50\u5bcc\u7684\u6578\u64da\u7d50\u69cb\uff1a<\/strong>Redis \u652f\u6301\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5982\u5b57\u7b26\u4e32\u3001\u54c8\u5e0c\u3001\u5217\u8868\u3001\u96c6\u5408\u7b49\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u8655\u7406\u8907\u96dc\u6578\u64da\u6642\u66f4\u52a0\u9748\u6d3b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%a7%92%e6%ae%ba%e7%b3%bb%e7%b5%b1%e7%9a%84%e8%a8%ad%e8%a8%88%e6%80%9d%e8%b7%af-yQVomLcPvU\">\u79d2\u6bba\u7cfb\u7d71\u7684\u8a2d\u8a08\u601d\u8def<\/h2>\n<p>\u8a2d\u8a08\u4e00\u500b\u9ad8\u6548\u7684\u79d2\u6bba\u7cfb\u7d71\u9700\u8981\u8003\u616e\u591a\u500b\u65b9\u9762\uff0c\u5305\u62ec\u6d41\u91cf\u63a7\u5236\u3001\u6578\u64da\u4e00\u81f4\u6027\u548c\u7cfb\u7d71\u64f4\u5c55\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u95dc\u9375\u7684\u8a2d\u8a08\u601d\u8def\uff1a<\/p>\n<h3 id=\"1-%e6%b5%81%e9%87%8f%e6%8e%a7%e5%88%b6-yQVomLcPvU\">1. \u6d41\u91cf\u63a7\u5236<\/h3>\n<p>\u5728\u79d2\u6bba\u6d3b\u52d5\u4e2d\uff0c\u901a\u5e38\u6703\u6709\u5927\u91cf\u7528\u6236\u540c\u6642\u8a2a\u554f\u7cfb\u7d71\uff0c\u9019\u6703\u5c0e\u81f4\u670d\u52d9\u5668\u904e\u8f09\u3002\u70ba\u4e86\u63a7\u5236\u6d41\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528 Redis \u7684\u9650\u6d41\u529f\u80fd\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u9650\u6d41\u5be6\u73fe\uff1a<\/p>\n<pre><code>\ndef rate_limit(user_id):\n    current_time = int(time.time())\n    key = f\"rate_limit:{user_id}\"\n    # \u4f7f\u7528 Redis \u7684 ZADD \u547d\u4ee4\u5c07\u7576\u524d\u6642\u9593\u6233\u6dfb\u52a0\u5230\u6709\u5e8f\u96c6\u5408\u4e2d\n    redis.zadd(key, {current_time: current_time})\n    # \u522a\u9664\u8d85\u904e 1 \u5206\u9418\u7684\u6642\u9593\u6233\n    redis.zremrangebyscore(key, 0, current_time - 60)\n    # \u7372\u53d6\u7576\u524d\u7528\u6236\u5728\u904e\u53bb 1 \u5206\u9418\u5167\u7684\u8acb\u6c42\u6578\n    request_count = redis.zcard(key)\n    return request_count &lt;= 5  # \u9650\u5236\u6bcf\u5206\u9418\u6700\u591a 5 \u6b21\u8acb\u6c42\n<\/code><\/pre>\n<h3 id=\"2-%e6%95%b8%e6%93%9a%e4%b8%80%e8%87%b4%e6%80%a7-yQVomLcPvU\">2. \u6578\u64da\u4e00\u81f4\u6027<\/h3>\n<p>\u5728\u9ad8\u4e26\u767c\u7684\u60c5\u6cc1\u4e0b\uff0c\u6578\u64da\u7684\u4e00\u81f4\u6027\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528 Redis \u7684\u4e8b\u52d9\u529f\u80fd\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u539f\u5b50\u6027\u3002\u4f8b\u5982\uff0c\u5728\u79d2\u6bba\u6d3b\u52d5\u4e2d\uff0c\u7576\u7528\u6236\u6210\u529f\u4e0b\u55ae\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\u4f86\u66f4\u65b0\u5eab\u5b58\uff1a<\/p>\n<pre><code>\ndef purchase_item(item_id, user_id):\n    with redis.pipeline() as pipe:\n        while True:\n            try:\n                pipe.watch(f\"stock:{item_id}\")\n                stock = pipe.get(f\"stock:{item_id}\")\n                if int(stock) &gt; 0:\n                    pipe.multi()\n                    pipe.decr(f\"stock:{item_id}\")\n                    pipe.sadd(f\"purchased:{item_id}\", user_id)\n                    pipe.execute()\n                    return True\n                else:\n                    return False\n            except redis.WatchError:\n                continue\n<\/code><\/pre>\n<h3 id=\"3-%e7%b3%bb%e7%b5%b1%e6%93%b4%e5%b1%95%e6%80%a7-yQVomLcPvU\">3. \u7cfb\u7d71\u64f4\u5c55\u6027<\/h3>\n<p>\u96a8\u8457\u7528\u6236\u6578\u91cf\u7684\u589e\u52a0\uff0c\u7cfb\u7d71\u9700\u8981\u5177\u5099\u826f\u597d\u7684\u64f4\u5c55\u6027\u3002\u53ef\u4ee5\u8003\u616e\u4f7f\u7528 Redis Cluster \u4f86\u5206\u6563\u6578\u64da\u8ca0\u8f09\uff0c\u4e26\u63d0\u9ad8\u7cfb\u7d71\u7684\u53ef\u7528\u6027\u548c\u5bb9\u932f\u80fd\u529b\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-yQVomLcPvU\">\u7d50\u8ad6<\/h2>\n<p>\u5229\u7528 Redis \u8a2d\u8a08\u4e00\u500b\u9ad8\u6548\u7684\u79d2\u6bba\u7cfb\u7d71\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u7528\u6236\u7684\u97ff\u61c9\u901f\u5ea6\u548c\u6574\u9ad4\u9ad4\u9a57\u3002\u901a\u904e\u5408\u7406\u7684\u6d41\u91cf\u63a7\u5236\u3001\u6578\u64da\u4e00\u81f4\u6027\u7ba1\u7406\u548c\u7cfb\u7d71\u64f4\u5c55\u6027\u8a2d\u8a08\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u69cb\u5efa\u51fa\u4e00\u500b\u7a69\u5b9a\u4e14\u9ad8\u6548\u7684\u79d2\u6bba\u5e73\u53f0\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6027\u80fd\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u7cfb\u7d71\u5728\u9ad8\u8ca0\u8f09\u4e0b\u4f9d\u7136\u80fd\u5920\u7a69\u5b9a\u904b\u884c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6975\u901f\u79d2\u6bba Redis \u8a2d\u8a08\uff0c\u63d0\u4f9b\u8d85\u5feb\u97ff\u61c9\uff0c\u52a9\u4f60\u8f15\u9b06\u61c9\u5c0d\u9ad8\u6d41\u91cf\u9700\u6c42\uff0c\u63d0\u5347\u7528\u6236\u9ad4\u9a57\uff0c\u8b93\u79d2\u6bba\u6d3b\u52d5\u66f4\u9806\u5229\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-161803","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161803","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=161803"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161803\/revisions"}],"predecessor-version":[{"id":161804,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161803\/revisions\/161804"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=161803"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=161803"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=161803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}