{"id":201738,"date":"2025-05-10T10:20:20","date_gmt":"2025-05-10T02:20:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201738\/"},"modified":"2025-05-10T10:20:20","modified_gmt":"2025-05-10T02:20:20","slug":"redis%e7%9a%84lua%e8%84%9a%e6%9c%ac%e7%bc%96%e5%86%99%e5%92%8c%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201738\/","title":{"rendered":"Redis\u7684Lua\u811a\u672c\u7f16\u5199\u548c\u5e94\u7528"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>Redis\u7684Lua\u811a\u672c\u7f16\u5199\u548c\u5e94\u7528<\/h1>\n<p>\u5728\u6570\u636e\u5e93\u5b9e\u6218\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e9b\u8fd9\u6837\u90a3\u6837\u7684\u95ee\u9898\uff0c\u7136\u540e\u8981\u5361\u597d\u534a\u5929\uff0c\u7b49\u95ee\u9898\u89e3\u51b3\u4e86\u624d\u53d1\u73b0\u539f\u6765\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u662f\u6ca1\u6709\u638c\u63e1\u597d\u3002\u4eca\u5929golang\u5b66\u4e60\u7f51\u5c31\u6574\u7406\u5206\u4eab\u300aRedis\u7684Lua\u811a\u672c\u7f16\u5199\u548c\u5e94\u7528\u300b\uff0c\u804a\u804a\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u6b63\u5728\u52aa\u529b\u8d5a\u94b1\u7684\u4f60\u3002<\/p>\n<p>Redis\u662f\u4e00\u79cd\u5f00\u6e90\u7684\u952e\u503c\u5bf9\u5b58\u50a8\u6570\u636e\u5e93\uff0cLua\u811a\u672c\u662fRedis\u4e2d\u4e00\u79cd\u975e\u5e38\u5f3a\u5927\u7684\u7f16\u7a0b\u5de5\u5177\u3002Lua\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u3001\u9ad8\u6548\u7684\u811a\u672c\u8bed\u8a00\uff0c\u53ef\u4ee5\u4f5c\u4e3aRedis\u670d\u52a1\u5668\u7aef\u7684\u6269\u5c55\u8bed\u8a00\u6765\u4f7f\u7528\u3002\u672c\u6587\u5c06\u4ecb\u7ecdRedis\u4e2dLua\u811a\u672c\u7684\u7f16\u5199\u3001\u8c03\u7528\u65b9\u6cd5\u4ee5\u53ca\u5b9e\u9645\u5e94\u7528\u3002<\/p>\n<p>\u4e00\u3001Redis\u4e2dLua\u811a\u672c\u7f16\u5199<\/p>\n<p>1.1 Lua\u811a\u672c\u8bed\u8a00\u7b80\u4ecb<\/p>\n<p>Lua\u811a\u672c\u4f5c\u4e3a\u4e00\u79cd\u8f7b\u91cf\u7ea7\u8bed\u8a00\uff0c\u5177\u6709\u975e\u5e38\u5c0f\u7684\u7279\u5b9a\u8bed\u6cd5\u96c6\u5408\u3001\u52a8\u6001\u7c7b\u578b\u8bed\u8a00\u548c\u826f\u597d\u7684\u6027\u80fd\u8868\u73b0\u7b49\u591a\u79cd\u7279\u6027\uff0c\u4f46\u8fd9\u4e9b\u7279\u70b9\u4f7f\u5f97Lua\u811a\u672c\u66f4\u9002\u5408\u4e8e\u9488\u5bf9\u4e00\u4e9b\u7279\u5b9a\u95ee\u9898\u7684\u89e3\u51b3\u3002<\/p>\n<p>1.2 Redis\u4e2dLua\u811a\u672c\u8bed\u8a00\u7684\u4f18\u7f3a\u70b9<\/p>\n<p>\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>\u539f\u5b50\u6027\uff1aLua\u811a\u672c\u662f\u539f\u5b50\u6027\u7684\uff0c\u4e0d\u4f1a\u88ab\u5176\u4ed6\u5ba2\u6237\u7aef\u6253\u65ad\uff0c\u662f\u5355\u72ec\u6267\u884c\u7684\u3002<\/li>\n<li>\u53ef\u590d\u7528\u6027\uff1aLua\u811a\u672c\u7684\u4ee3\u7801\u53ef\u4ee5\u5728\u591a\u4e2aREDIS\u8282\u70b9\u4e0a\u53ef\u590d\u7528\u3002<\/li>\n<li>\u6027\u80fd\u4f18\u79c0\uff1aLua\u811a\u672c\u7684\u89e3\u91ca\u5668\u4e0eRedis Server\u901a\u8fc7\u5171\u4eab\u8fdb\u7a0b\u7684\u65b9\u5f0f\uff0c\u5b9e\u73b0\u4e86\u975e\u5e38\u9ad8\u6548\u7684\u6027\u80fd\u8868\u73b0\u3002<\/li>\n<\/ul>\n<p>\u7f3a\u70b9\uff1a<\/p>\n<ul>\n<li>\u96be\u4ee5\u8c03\u8bd5\uff1aLua\u811a\u672c\u7684\u8bed\u8a00\u7279\u6027\u548cRedis\u8bed\u8a00\u7279\u6027\u6709\u6240\u4e0d\u540c\uff0c\u5f88\u96be\u5bf9Lua\u811a\u672c\u8fdb\u884c\u5b8c\u6574\u7684\u8c03\u67e5\uff1b<\/li>\n<li>Redis\u4e0eLua\u811a\u672c\u4e4b\u95f4\u7684\u94fe\u63a5\uff1aLua\u811a\u672c\u9700\u8981\u901a\u8fc7\u5ba2\u6237\u7aef\u6765\u4f20\u9012\u53c2\u6570\u548c\u8fd4\u56de\u6570\u636e\uff0c\u589e\u52a0\u4e86\u989d\u5916\u7684\u5f00\u9500\u3002<\/li>\n<\/ul>\n<p>1.3 Redis\u4e2dLua\u811a\u672c\u7f16\u5199\u89c4\u5219<\/p>\n<ul>\n<li>Redis\u4f7f\u7528\u7684Lua\u73af\u5883\u4e3a5.1\uff0c\u5e76\u517c\u5bb9\u90e8\u52065.2\u7248\u672c\u7684\u6269\u5c55\u8bed\u6cd5\uff1b<\/li>\n<li>\u6240\u6709\u7684Redis\u547d\u4ee4\u5fc5\u987b\u901a\u8fc7Redis.call\u6765\u8c03\u7528\uff1b<\/li>\n<li>\u6240\u6709\u7684Redis.key\u503c\u5f15\u7528\u90fd\u9700\u8981\u4f7f\u7528KEYS\u6216\u8005ARGV\u6765\u8fdb\u884c\u4f20\u9012\uff1b<\/li>\n<li>\u6240\u6709\u7684\u9519\u8bef\u5904\u7406\u90fd\u9700\u8981\u4f7f\u7528error\u51fd\u6570\u3002<\/li>\n<\/ul>\n<p>1.4 Redis\u4e2dLua\u811a\u672c\u4ee3\u7801\u793a\u4f8b<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8ba1\u6b21\u5668\u7684Lua\u811a\u672c\u793a\u4f8b\uff1a<\/p>\n<p>local count = tonumber(redis.call(&#8220;get&#8221;, KEYS[1])) or 0<br \/>if count &gt; tonumber(ARGV[1]) then<\/p>\n<pre>redis.call(\"set\", KEYS[1], ARGV[1])\nreturn 0<\/pre>\n<p>else<\/p>\n<pre>count = redis.call(\"incr\", KEYS[1])\nreturn count <\/pre>\n<p>end<\/p>\n<p>\u4e8c\u3001Redis\u4e2dLua\u811a\u672c\u7684\u8c03\u7528\u65b9\u6cd5<\/p>\n<p>\u5728Redis\u4e2d\u8c03\u7528Lua\u811a\u672c\u6709\u4e24\u79cd\u65b9\u5f0f\uff1a<\/p>\n<p>2.1 \u4f7f\u7528EVAL\u547d\u4ee4<\/p>\n<p>Redis\u63d0\u4f9b\u4e86EVAL\u547d\u4ee4\uff0c\u53ef\u4ee5\u7528\u4e8e\u8fd0\u884c\u7f16\u5199\u597d\u7684Lua\u811a\u672c\u3002<\/p>\n<p>\u8bed\u6cd5\uff1a <br \/>EVAL script numkeys key [key &#8230;] arg [arg &#8230;]<\/p>\n<p>\u793a\u4f8b\uff1a<\/p>\n<p>redis.eval(&#8216;return redis.call(&#8220;GET&#8221;, KEYS[1])&#8217;, 1, &#8220;mykey&#8221;) <\/p>\n<p>2.2 \u4f7f\u7528SCRIPT LOAD\u547d\u4ee4<\/p>\n<p>\u5728Redis\u4e2d\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7SCRIPT LOAD\u547d\u4ee4\u6765\u4e8b\u5148\u52a0\u8f7dLua\u811a\u672c\uff0c\u7136\u540e\u8c03\u7528SHA1\u54c8\u5e0c\u503c\u6765\u6267\u884c\u811a\u672c\u3002<\/p>\n<p>\u8bed\u6cd5\uff1a<br \/>SCRIPT LOAD script<\/p>\n<p>\u793a\u4f8b\uff1a<\/p>\n<p>local script = [[<\/p>\n<pre>local key = KEYS[1]\nlocal max_count = tonumber(ARGV[1])\nlocal current_count = tonumber(redis.call(\"get\", key))\nif current_count and current_count &gt;= max_count then\n    redis.call(\"del\", key)\nend\nredis.call(\"incr\", key)\nreturn true<\/pre>\n<p>]]<\/p>\n<p>local key = &#8216;limiter:xxx&#8217;<br \/>local max_count = 10<br \/>local script_sha = redis.call(&#8216;SCRIPT&#8217;, &#8216;LOAD&#8217;, script)<br \/>redis.call(&#8216;EVALSHA&#8217;, script_sha, 1, key, max_count)<\/p>\n<p>\u4e09\u3001Redis\u4e2dLua\u811a\u672c\u5e94\u7528\u5b9e\u4f8b<\/p>\n<p>3.1 \u5206\u5e03\u5f0f\u9501<\/p>\n<p>\u5206\u5e03\u5f0f\u9501\u8981\u6c42\u6240\u6709Redis\u8282\u70b9\u4e0a\u90fd\u9700\u8981\u6709\u76f8\u540c\u7684\u811a\u672c\u4ee3\u7801\uff0c\u8fd9\u79cd\u8bbe\u8ba1\u53ef\u4ee5\u63d0\u9ad8\u5e94\u7528\u7684\u8fd0\u884c\u6548\u7387\u3002<\/p>\n<p>Lua\u811a\u672c\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u793a\u4f8b\uff1a<\/p>\n<p>local lock_key = KEYS[1]<br \/>local lock_timeout = tonumber(ARGV[1])<br \/>local lock_value = KEYS[2]<br \/>local lock_valid_time = tonumber(ARGV[2])<\/p>\n<p>if redis.call(&#8220;set&#8221;, lock_key, lock_value, &#8220;NX&#8221;, &#8220;EX&#8221;, lock_timeout) then<\/p>\n<pre>redis.call(\"expire\", lock_key, lock_valid_time)\nreturn lock_value<\/pre>\n<p>else<\/p>\n<pre>return nil<\/pre>\n<p>end<\/p>\n<p>3.2 \u6709\u5e8f\u96c6\u5408\u5206\u9875\u67e5\u8be2<\/p>\n<p>Redis\u6709\u5e8f\u96c6\u5408\u63d0\u4f9b\u4e86\u5206\u9875\u67e5\u8be2\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u6839\u636escore\u7684\u8303\u56f4\uff0c\u5728\u6709\u5e8f\u96c6\u5408\u4e2d\u8fdb\u884c\u5206\u9875\u67e5\u8be2\u3002<\/p>\n<p>Lua\u811a\u672c\u5b9e\u73b0\u6709\u5e8f\u96c6\u5408\u5206\u9875\u67e5\u8be2\u7684\u793a\u4f8b\uff1a<\/p>\n<p>local page_no = tonumber(ARGV[1])<br \/>local page_size = tonumber(ARGV[2])<br \/>local start = (page_no &#8211; 1) * page_size<br \/>local stop = page_no * page_size &#8211; 1<br \/>local opts = {score_cast_func = tonumber}<\/p>\n<p>local result = {}<\/p>\n<p>local data = redis.call(&#8220;ZRANGE&#8221;, KEYS[1], start, stop, &#8220;WITHSCORES&#8221;)<br \/>for idx = 1, #data, 2 do<\/p>\n<pre>local k = data[idx]\nlocal v = tonumber(data[idx + 1])\ntable.insert(result, {k, v})<\/pre>\n<p>end<\/p>\n<p>return result<\/p>\n<p>\u7ed3\u8bed\uff1a<\/p>\n<p>Lua\u811a\u672c\u662fRedis\u4e2d\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u56e0\u6b64Lua\u811a\u672c\u7684\u7f16\u5199\u548c\u8c03\u7528\u65b9\u6cd5\u975e\u5e38\u91cd\u8981\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u9488\u5bf9\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\uff0c\u7f16\u5199\u76f8\u5e94\u7684Lua\u811a\u672c\uff0c\u63d0\u9ad8Redis\u7684\u6027\u80fd\u548c\u8fd0\u884c\u901f\u5ea6\u3002<\/p>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u5982\u4f55\u5728Go\u4e2d\u8fdb\u884cCPU\u5206\u6790\uff1f\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u4efb\u52a1\u8c03\u5ea6\u7684\u65b9\u6cd5\u4e0e\u5e94\u7528\u5b9e\u4f8b\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>Redis\u7684Lua\u811a\u672c\u7f16\u5199\u548c\u5e94\u7528&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201738","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201738","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=201738"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201738\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201738"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201738"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}