{"id":167065,"date":"2024-11-05T22:04:19","date_gmt":"2024-11-05T14:04:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/167065\/"},"modified":"2024-11-05T22:04:20","modified_gmt":"2024-11-05T14:04:20","slug":"%e5%88%a9%e7%94%a8redis-setnx%e5%af%a6%e7%8f%be%e5%8b%95%e6%85%8b%e9%99%90%e6%b5%81%ef%bc%88redis%e9%99%90%e6%b5%81setnx%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/167065\/","title":{"rendered":"\u5229\u7528Redis SetNX\u5be6\u73fe\u52d5\u614b\u9650\u6d41\uff08redis\u9650\u6d41setnx\uff09"},"content":{"rendered":"<h1 id=\"%e5%88%a9%e7%94%a8redis-setnx%e5%af%a6%e7%8f%be%e5%8b%95%e6%85%8b%e9%99%90%e6%b5%81%ef%bc%88redis%e9%99%90%e6%b5%81setnx%ef%bc%89-pxLehaaIWW\">\u5229\u7528Redis SetNX\u5be6\u73fe\u52d5\u614b\u9650\u6d41\uff08redis\u9650\u6d41setnx\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u7db2\u7d61\u74b0\u5883\u4e2d\uff0c\u9650\u6d41\u6280\u8853\u5df2\u6210\u70ba\u4fdd\u8b77\u61c9\u7528\u7a0b\u5e8f\u548c\u670d\u52d9\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\uff0c\u9632\u6b62\u670d\u52d9\u904e\u8f09\uff0c\u6210\u70ba\u4e86\u958b\u767c\u8005\u9762\u81e8\u7684\u4e00\u5927\u6311\u6230\u3002Redis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u7d50\u69cb\u548c\u64cd\u4f5c\uff0c\u7279\u5225\u662fSetNX\u547d\u4ee4\uff0c\u70ba\u5be6\u73fe\u52d5\u614b\u9650\u6d41\u63d0\u4f9b\u4e86\u4fbf\u5229\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afsetnx%ef%bc%9f-pxLehaaIWW\">\u4ec0\u9ebc\u662fSetNX\uff1f<\/h2>\n<p>SetNX\u662fRedis\u4e2d\u7684\u4e00\u500b\u547d\u4ee4\uff0c\u5176\u5168\u540d\u70ba\u201cSET if Not eXists\u201d\u3002\u9019\u500b\u547d\u4ee4\u7684\u4f5c\u7528\u662f\uff1a\u53ea\u6709\u7576\u6307\u5b9a\u7684\u9375\u4e0d\u5b58\u5728\u6642\uff0c\u624d\u6703\u8a2d\u7f6e\u9375\u7684\u503c\u3002\u9019\u4e00\u7279\u6027\u4f7f\u5f97SetNX\u975e\u5e38\u9069\u5408\u7528\u65bc\u5be6\u73fe\u9396\u548c\u9650\u6d41\u7b49\u5834\u666f\u3002<\/p>\n<h2 id=\"%e9%99%90%e6%b5%81%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-pxLehaaIWW\">\u9650\u6d41\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u9650\u6d41\u662f\u6307\u5c0d\u67d0\u4e00\u8cc7\u6e90\u7684\u8a2a\u554f\u9032\u884c\u63a7\u5236\uff0c\u4ee5\u9632\u6b62\u904e\u591a\u7684\u8acb\u6c42\u540c\u6642\u5230\u9054\uff0c\u5c0e\u81f4\u7cfb\u7d71\u6027\u80fd\u4e0b\u964d\u6216\u5d29\u6f70\u3002\u5e38\u898b\u7684\u9650\u6d41\u7b56\u7565\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u56fa\u5b9a\u7a97\u53e3\u9650\u6d41\uff1a\u5728\u56fa\u5b9a\u7684\u6642\u9593\u7a97\u53e3\u5167\u9650\u5236\u8acb\u6c42\u6578\u91cf\u3002<\/li>\n<li>\u6ed1\u52d5\u7a97\u53e3\u9650\u6d41\uff1a\u6839\u64da\u8acb\u6c42\u7684\u6642\u9593\u6233\u52d5\u614b\u8a08\u7b97\u8acb\u6c42\u6578\u91cf\u3002<\/li>\n<li>\u4ee4\u724c\u6876\u7b97\u6cd5\uff1a\u901a\u904e\u4ee4\u724c\u7684\u751f\u6210\u548c\u6d88\u8017\u4f86\u63a7\u5236\u8acb\u6c42\u7684\u901f\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8redis-setnx%e5%af%a6%e7%8f%be%e9%99%90%e6%b5%81-pxLehaaIWW\">\u4f7f\u7528Redis SetNX\u5be6\u73fe\u9650\u6d41<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528Redis SetNX\u547d\u4ee4\u5be6\u73fe\u7c21\u55ae\u9650\u6d41\u7684\u793a\u4f8b\u3002\u5047\u8a2d\u6211\u5011\u5e0c\u671b\u5728\u4e00\u5206\u9418\u5167\u9650\u5236\u67d0\u500b\u7528\u6236\u7684\u8acb\u6c42\u6b21\u6578\u4e0d\u8d85\u904e5\u6b21\u3002<\/p>\n<pre><code>import redis\nimport time\n\n# \u9023\u63a5\u5230Redis\nr = redis.StrictRedis(host='localhost', port=6379, db=0)\n\ndef rate_limiter(user_id):\n    key = f\"rate_limit:{user_id}\"\n    current_time = int(time.time())\n    \n    # \u4f7f\u7528SetNX\u8a2d\u7f6e\u9375\u503c\n    if r.setnx(key, 1):\n        # \u5982\u679c\u8a2d\u7f6e\u6210\u529f\uff0c\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u70ba60\u79d2\n        r.expire(key, 60)\n        return True\n    else:\n        # \u5982\u679c\u9375\u5df2\u5b58\u5728\uff0c\u5247\u589e\u52a0\u8a08\u6578\n        current_count = r.incr(key)\n        if current_count &gt; 5:\n            return False\n        return True\n\n# \u6e2c\u8a66\u9650\u6d41\nuser_id = \"user123\"\nfor i in range(10):\n    if rate_limiter(user_id):\n        print(f\"\u8acb\u6c42 {i+1} \u88ab\u5141\u8a31\")\n    else:\n        print(f\"\u8acb\u6c42 {i+1} \u88ab\u62d2\u7d55\")\n    time.sleep(10)  # \u6a21\u64ec\u8acb\u6c42\u9593\u9694\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u6aa2\u67e5\u7528\u6236\u7684\u8acb\u6c42\u662f\u5426\u5728\u9650\u5236\u7bc4\u570d\u5167\u3002\u5982\u679c\u7528\u6236\u7684\u8acb\u6c42\u6b21\u6578\u672a\u8d85\u904e5\u6b21\uff0c\u5247\u5141\u8a31\u8acb\u6c42\u4e26\u8fd4\u56deTrue\uff1b\u5426\u5247\uff0c\u8fd4\u56deFalse\uff0c\u8868\u793a\u8acb\u6c42\u88ab\u62d2\u7d55\u3002<\/p>\n<h2 id=\"%e5%84%aa%e5%8c%96%e8%88%87%e6%93%b4%e5%b1%95-pxLehaaIWW\">\u512a\u5316\u8207\u64f4\u5c55<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u6839\u64da\u696d\u52d9\u9700\u6c42\u9032\u884c\u66f4\u8907\u96dc\u7684\u9650\u6d41\u7b56\u7565\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u6839\u64da\u4e0d\u540c\u7684\u7528\u6236\u89d2\u8272\u8a2d\u7f6e\u4e0d\u540c\u7684\u9650\u6d41\u898f\u5247\uff0c\u6216\u8005\u6839\u64da\u8acb\u6c42\u7684\u985e\u578b\u9032\u884c\u5206\u985e\u9650\u6d41\u3002\u6b64\u5916\uff0c\u9084\u53ef\u4ee5\u7d50\u5408Redis\u7684\u5176\u4ed6\u6578\u64da\u7d50\u69cb\uff0c\u5982Sorted Set\uff0c\u4f86\u5be6\u73fe\u66f4\u7cbe\u7d30\u7684\u9650\u6d41\u63a7\u5236\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-pxLehaaIWW\">\u7e3d\u7d50<\/h2>\n<p>\u5229\u7528Redis\u7684SetNX\u547d\u4ee4\u5be6\u73fe\u52d5\u614b\u9650\u6d41\u662f\u4e00\u7a2e\u9ad8\u6548\u4e14\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u5408\u7406\u8a2d\u8a08\u9650\u6d41\u908f\u8f2f\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fdd\u8b77\u7cfb\u7d71\u8cc7\u6e90\uff0c\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u548c\u9ad8\u6027\u80fd\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u4f86\u90e8\u7f72Redis\u670d\u52d9\uff0c\u5c07\u6709\u52a9\u65bc\u5be6\u73fe\u66f4\u597d\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5229\u7528Redis SetNX\u6280\u8853\u5be6\u73fe\u52d5\u614b\u9650\u6d41\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\uff0c\u9632\u6b62\u904e\u8f09\uff0c\u78ba\u4fdd\u7a69\u5b9a\u904b\u884c\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-167065","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167065","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=167065"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167065\/revisions"}],"predecessor-version":[{"id":167066,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167065\/revisions\/167066"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=167065"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=167065"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=167065"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}