{"id":195797,"date":"2024-11-13T17:59:21","date_gmt":"2024-11-13T09:59:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/195797\/"},"modified":"2024-11-13T17:59:22","modified_gmt":"2024-11-13T09:59:22","slug":"%e5%9c%a8redis%e4%b8%ad%e5%88%a9%e7%94%a8lua%e8%85%b3%e6%9c%ac%e5%af%a6%e7%8f%be%e8%b1%90%e5%af%8c%e6%93%8d%e4%bd%9c%ef%bc%88redis%e8%aa%bf%e7%94%a8lua%e8%85%b3%e6%9c%ac%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/195797\/","title":{"rendered":"\u5728Redis\u4e2d\u5229\u7528Lua\u8173\u672c\u5be6\u73fe\u8c50\u5bcc\u64cd\u4f5c\uff08redis\u8abf\u7528lua\u8173\u672c\uff09"},"content":{"rendered":"<h1 id=\"%e5%9c%a8redis%e4%b8%ad%e5%88%a9%e7%94%a8lua%e8%85%b3%e6%9c%ac%e5%af%a6%e7%8f%be%e8%b1%90%e5%af%8c%e6%93%8d%e4%bd%9c-yLMODgHESI\">\u5728Redis\u4e2d\u5229\u7528Lua\u8173\u672c\u5be6\u73fe\u8c50\u5bcc\u64cd\u4f5c<\/h1>\n<p>Redis\u662f\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\u4e2d\uff0c\u5982\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u6578\u64da\u5b58\u5132\u7b49\u3002\u96a8\u8457\u61c9\u7528\u9700\u6c42\u7684\u591a\u6a23\u5316\uff0cRedis\u63d0\u4f9b\u4e86Lua\u8173\u672c\u7684\u652f\u6301\uff0c\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u5728\u670d\u52d9\u5668\u7aef\u57f7\u884c\u8907\u96dc\u7684\u64cd\u4f5c\uff0c\u5f9e\u800c\u63d0\u9ad8\u6027\u80fd\u548c\u6548\u7387\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728Redis\u4e2d\u5229\u7528Lua\u8173\u672c\u5be6\u73fe\u8c50\u5bcc\u7684\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e4%bd%bf%e7%94%a8lua%e8%85%b3%e6%9c%ac-yLMODgHESI\">\u70ba\u4ec0\u9ebc\u4f7f\u7528Lua\u8173\u672c<\/h2>\n<p>\u4f7f\u7528Lua\u8173\u672c\u7684\u4e3b\u8981\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u539f\u5b50\u6027\uff1a<\/strong>Lua\u8173\u672c\u5728Redis\u4e2d\u662f\u539f\u5b50\u57f7\u884c\u7684\uff0c\u9019\u610f\u5473\u8457\u5728\u8173\u672c\u57f7\u884c\u671f\u9593\uff0c\u5176\u4ed6\u547d\u4ee4\u4e0d\u6703\u5e72\u64fe\uff0c\u78ba\u4fdd\u4e86\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<li><strong>\u6027\u80fd\u512a\u5316\uff1a<\/strong>\u5c07\u591a\u500b\u64cd\u4f5c\u5408\u4f75\u5230\u4e00\u500bLua\u8173\u672c\u4e2d\uff0c\u53ef\u4ee5\u6e1b\u5c11\u5ba2\u6236\u7aef\u548c\u670d\u52d9\u5668\u4e4b\u9593\u7684\u901a\u4fe1\u6b21\u6578\uff0c\u5f9e\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>Lua\u8a9e\u8a00\u7c21\u55ae\u6613\u5b78\uff0c\u80fd\u5920\u5be6\u73fe\u8907\u96dc\u7684\u908f\u8f2f\u8655\u7406\uff0c\u6eff\u8db3\u591a\u6a23\u5316\u7684\u696d\u52d9\u9700\u6c42\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%9c%a8redis%e4%b8%ad%e4%bd%bf%e7%94%a8lua%e8%85%b3%e6%9c%ac-yLMODgHESI\">\u5982\u4f55\u5728Redis\u4e2d\u4f7f\u7528Lua\u8173\u672c<\/h2>\n<p>\u5728Redis\u4e2d\u57f7\u884cLua\u8173\u672c\u975e\u5e38\u7c21\u55ae\uff0c\u4e3b\u8981\u4f7f\u7528`EVAL`\u547d\u4ee4\u3002\u4ee5\u4e0b\u662f\u57fa\u672c\u7684\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>EVAL &lt;script&gt; &lt;numkeys&gt; &lt;key1&gt; &lt;key2&gt; ... &lt;arg1&gt; ... &lt;argN&gt;\n<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c&#8220;\u662fLua\u8173\u672c\u7684\u5167\u5bb9\uff0c&#8220;\u662f\u9375\u7684\u6578\u91cf\uff0c&#8220;\u3001&#8220;\u7b49\u662f\u8981\u64cd\u4f5c\u7684\u9375\uff0c&#8220;\u3001&#8220;\u662f\u50b3\u905e\u7d66\u8173\u672c\u7684\u53c3\u6578\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e8%a8%88%e7%ae%97%e5%88%97%e8%a1%a8%e7%9a%84%e7%b8%bd%e5%92%8c-yLMODgHESI\">\u793a\u4f8b\uff1a\u8a08\u7b97\u5217\u8868\u7684\u7e3d\u548c<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684Lua\u8173\u672c\u793a\u4f8b\uff0c\u7528\u65bc\u8a08\u7b97Redis\u5217\u8868\u4e2d\u6240\u6709\u5143\u7d20\u7684\u7e3d\u548c\uff1a<\/p>\n<pre><code>local sum = 0\nfor i = 1, redis.call('LLEN', KEYS[1]) do\n    sum = sum + tonumber(redis.call('LINDEX', KEYS[1], i - 1))\nend\nreturn sum\n<\/code><\/pre>\n<p>\u8981\u57f7\u884c\u9019\u500b\u8173\u672c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>EVAL \"local sum = 0 for i = 1, redis.call('LLEN', KEYS[1]) do sum = sum + tonumber(redis.call('LINDEX', KEYS[1], i - 1)) end return sum\" 1 mylist\n<\/code><\/pre>\n<p>\u9019\u88e1\uff0c`mylist`\u662f\u8981\u8a08\u7b97\u7684\u5217\u8868\u7684\u9375\u540d\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%8e%9f%e5%ad%90%e6%80%a7%e6%93%8d%e4%bd%9c-yLMODgHESI\">\u793a\u4f8b\uff1a\u539f\u5b50\u6027\u64cd\u4f5c<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u9700\u8981\u5be6\u73fe\u4e00\u500b\u539f\u5b50\u6027\u64cd\u4f5c\uff0c\u5c07\u4e00\u500b\u7528\u6236\u7684\u8cec\u6236\u9918\u984d\u6e1b\u53bb\u4e00\u5b9a\u7684\u91d1\u984d\uff0c\u4e26\u6aa2\u67e5\u9918\u984d\u662f\u5426\u8db3\u5920\u3002\u4ee5\u4e0b\u662f\u76f8\u61c9\u7684Lua\u8173\u672c\uff1a<\/p>\n<pre><code>local balance = tonumber(redis.call('GET', KEYS[1]))\nif balance &gt;= tonumber(ARGV[1]) then\n    redis.call('DECRBY', KEYS[1], ARGV[1])\n    return balance - tonumber(ARGV[1])\nelse\n    return nil\nend\n<\/code><\/pre>\n<p>\u57f7\u884c\u9019\u500b\u8173\u672c\u7684\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n<pre><code>EVAL \"local balance = tonumber(redis.call('GET', KEYS[1])) if balance &gt;= tonumber(ARGV[1]) then redis.call('DECRBY', KEYS[1], ARGV[1]) return balance - tonumber(ARGV[1]) else return nil end\" 1 user:balance 100\n<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-yLMODgHESI\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528Lua\u8173\u672c\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u8173\u672c\u7684\u57f7\u884c\u6642\u9593\u61c9\u8a72\u63a7\u5236\u5728\u5408\u7406\u7bc4\u570d\u5167\uff0c\u904e\u9577\u7684\u57f7\u884c\u6642\u9593\u53ef\u80fd\u6703\u5f71\u97ffRedis\u7684\u6027\u80fd\u3002<\/li>\n<li>Lua\u8173\u672c\u7684\u932f\u8aa4\u8655\u7406\u9700\u8981\u8b39\u614e\uff0c\u907f\u514d\u56e0\u70ba\u8173\u672c\u932f\u8aa4\u5c0e\u81f4\u6574\u500b\u64cd\u4f5c\u5931\u6557\u3002<\/li>\n<li>\u5728\u8173\u672c\u4e2d\u4f7f\u7528\u7684\u9375\u548c\u53c3\u6578\u61c9\u8a72\u660e\u78ba\uff0c\u907f\u514d\u51fa\u73fe\u610f\u5916\u7684\u6578\u64da\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-yLMODgHESI\">\u7e3d\u7d50<\/h2>\n<p>\u5229\u7528Lua\u8173\u672c\u5728Redis\u4e2d\u5be6\u73fe\u8c50\u5bcc\u64cd\u4f5c\uff0c\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6027\u80fd\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u539f\u5b50\u6027\u3002\u901a\u904e\u7c21\u55ae\u7684\u8a9e\u6cd5\u548c\u9748\u6d3b\u7684\u908f\u8f2f\u8655\u7406\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u6eff\u8db3\u5404\u7a2e\u696d\u52d9\u9700\u6c42\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u7684\u670d\u52d9\u5c07\u662f\u60a8\u7684\u7406\u60f3\u9078\u64c7\uff0c\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6 <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a> \u65b9\u6848\uff0c\u6211\u5011\u90fd\u80fd\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u5728Redis\u4e2d\u4f7f\u7528Lua\u8173\u672c\u5be6\u73fe\u9ad8\u6548\u7684\u6578\u64da\u64cd\u4f5c\uff0c\u63d0\u5347\u6027\u80fd\u8207\u9748\u6d3b\u6027\uff0c\u7c21\u5316\u8907\u96dc\u4efb\u52d9\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-195797","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195797","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=195797"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195797\/revisions"}],"predecessor-version":[{"id":195798,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195797\/revisions\/195798"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=195797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=195797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=195797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}