{"id":164087,"date":"2024-11-05T04:55:27","date_gmt":"2024-11-04T20:55:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/164087\/"},"modified":"2024-11-05T04:55:28","modified_gmt":"2024-11-04T20:55:28","slug":"%e8%a7%a3%e6%9e%90%e8%a7%a3%e8%ae%80redis%e9%80%9a%e4%bf%a1%e5%8d%94%e8%ad%b0%e6%ba%90%e7%a2%bc%ef%bc%8c%e6%b7%b1%e5%ba%a6%e6%8c%96%e6%8e%98%e5%85%b6%e4%b8%ad%e7%b2%be%e9%ab%93%ef%bc%88redis%e9%80%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/164087\/","title":{"rendered":"\u89e3\u6790\u89e3\u8b80Redis\u901a\u4fe1\u5354\u8b70\u6e90\u78bc\uff0c\u6df1\u5ea6\u6316\u6398\u5176\u4e2d\u7cbe\u9ad3\uff08Redis\u901a\u4fe1\u5354\u8b70\u6e90\u78bc\uff09"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e6%9e%90%e8%a7%a3%e8%ae%80redis%e9%80%9a%e4%bf%a1%e5%8d%94%e8%ad%b0%e6%ba%90%e7%a2%bc%ef%bc%8c%e6%b7%b1%e5%ba%a6%e6%8c%96%e6%8e%98%e5%85%b6%e4%b8%ad%e7%b2%be%e9%ab%93-emOFkmOeru\">\u89e3\u6790\u89e3\u8b80Redis\u901a\u4fe1\u5354\u8b70\u6e90\u78bc\uff0c\u6df1\u5ea6\u6316\u6398\u5176\u4e2d\u7cbe\u9ad3<\/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\u6301\u4e45\u5316\u7b49\u3002\u5176\u9ad8\u6027\u80fd\u7684\u80cc\u5f8c\uff0c\u96e2\u4e0d\u958b\u5176\u7cbe\u5999\u7684\u901a\u4fe1\u5354\u8b70\u3002\u672c\u6587\u5c07\u6df1\u5165\u89e3\u6790Redis\u7684\u901a\u4fe1\u5354\u8b70\u6e90\u78bc\uff0c\u5e6b\u52a9\u8b80\u8005\u7406\u89e3\u5176\u8a2d\u8a08\u7406\u5ff5\u53ca\u5be6\u73fe\u7d30\u7bc0\u3002<\/p>\n<h2 id=\"redis%e9%80%9a%e4%bf%a1%e5%8d%94%e8%ad%b0%e6%a6%82%e8%bf%b0-emOFkmOeru\">Redis\u901a\u4fe1\u5354\u8b70\u6982\u8ff0<\/h2>\n<p>Redis\u4f7f\u7528\u7684\u901a\u4fe1\u5354\u8b70\u7a31\u70baREdis Serialization Protocol\uff08RESP\uff09\u3002\u9019\u662f\u4e00\u7a2e\u7c21\u55ae\u800c\u9ad8\u6548\u7684\u6587\u672c\u5354\u8b70\uff0c\u65e8\u5728\u652f\u6301\u591a\u7a2e\u6578\u64da\u985e\u578b\uff0c\u5305\u62ec\u5b57\u7b26\u4e32\u3001\u6578\u7d44\u3001\u54c8\u5e0c\u3001\u96c6\u5408\u7b49\u3002RESP\u7684\u8a2d\u8a08\u4f7f\u5f97Redis\u80fd\u5920\u5728\u9ad8\u4e26\u767c\u7684\u60c5\u6cc1\u4e0b\uff0c\u4fdd\u6301\u4f4e\u5ef6\u9072\u7684\u6578\u64da\u4ea4\u4e92\u3002<\/p>\n<h2 id=\"resp%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-emOFkmOeru\">RESP\u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>RESP\u7684\u6578\u64da\u683c\u5f0f\u975e\u5e38\u7c21\u55ae\uff0c\u4e3b\u8981\u7531\u4ee5\u4e0b\u5e7e\u7a2e\u57fa\u672c\u985e\u578b\u7d44\u6210\uff1a<\/p>\n<ul>\n<li><strong>\u7c21\u55ae\u5b57\u7b26\u4e32<\/strong>: \u4ee5&#8221;+&#8221;\u958b\u982d\uff0c\u5f8c\u9762\u8ddf\u96a8\u5b57\u7b26\u4e32\u5167\u5bb9\u3002<\/li>\n<li><strong>\u932f\u8aa4\u4fe1\u606f<\/strong>: \u4ee5&#8221;-&#8220;\u958b\u982d\uff0c\u5f8c\u9762\u8ddf\u96a8\u932f\u8aa4\u63cf\u8ff0\u3002<\/li>\n<li><strong>\u6574\u6578<\/strong>: \u4ee5&#8221;:&#8221;\u958b\u982d\uff0c\u5f8c\u9762\u8ddf\u96a8\u6574\u6578\u503c\u3002<\/li>\n<li><strong>\u6279\u91cf\u5b57\u7b26\u4e32<\/strong>: \u4ee5&#8221;$&#8221;\u958b\u982d\uff0c\u5f8c\u9762\u8ddf\u96a8\u5b57\u7b26\u4e32\u9577\u5ea6\uff0c\u7136\u5f8c\u662f\u5b57\u7b26\u4e32\u5167\u5bb9\u3002<\/li>\n<li><strong>\u6578\u7d44<\/strong>: \u4ee5&#8221;*&#8221;\u958b\u982d\uff0c\u5f8c\u9762\u8ddf\u96a8\u6578\u7d44\u5143\u7d20\u7684\u6578\u91cf\uff0c\u7136\u5f8c\u662f\u6bcf\u500b\u5143\u7d20\u7684RESP\u683c\u5f0f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%ba%90%e7%a2%bc%e8%a7%a3%e6%9e%90-emOFkmOeru\">\u6e90\u78bc\u89e3\u6790<\/h2>\n<p>\u5728Redis\u7684\u6e90\u78bc\u4e2d\uff0cRESP\u7684\u89e3\u6790\u4e3b\u8981\u96c6\u4e2d\u5728`networking.c`\u6587\u4ef6\u4e2d\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u95dc\u9375\u51fd\u6578\u7684\u4ecb\u7d39\uff1a<\/p>\n<h3 id=\"%e8%ae%80%e5%8f%96%e5%91%bd%e4%bb%a4-emOFkmOeru\">\u8b80\u53d6\u547d\u4ee4<\/h3>\n<pre><code>\nvoid readQueryFromClient(client *c) {\n    \/\/ \u8b80\u53d6\u5ba2\u6236\u7aef\u767c\u9001\u7684\u6578\u64da\n    if (c-&gt;flags &amp; CLIENT_BLOCKED) return;\n    \/\/ \u89e3\u6790RESP\u683c\u5f0f\u7684\u6578\u64da\n    if (read(c-&gt;fd, c-&gt;querybuf, QUERYBUF_SIZE) == -1) {\n        \/\/ \u8655\u7406\u932f\u8aa4\n    }\n    \/\/ \u9032\u4e00\u6b65\u89e3\u6790\u547d\u4ee4\n    processCommand(c);\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c`readQueryFromClient`\u51fd\u6578\u8ca0\u8cac\u5f9e\u5ba2\u6236\u7aef\u8b80\u53d6\u6578\u64da\u4e26\u89e3\u6790RESP\u683c\u5f0f\u7684\u547d\u4ee4\u3002\u9019\u88e1\u7684`querybuf`\u662f\u7528\u4f86\u5b58\u5132\u63a5\u6536\u5230\u7684\u6578\u64da\u7de9\u885d\u5340\u3002<\/p>\n<h3 id=\"%e8%99%95%e7%90%86%e5%91%bd%e4%bb%a4-emOFkmOeru\">\u8655\u7406\u547d\u4ee4<\/h3>\n<pre><code>\nvoid processCommand(client *c) {\n    \/\/ \u6839\u64da\u89e3\u6790\u7684\u547d\u4ee4\u57f7\u884c\u76f8\u61c9\u7684\u64cd\u4f5c\n    if (strcmp(c-&gt;cmd-&gt;name, \"SET\") == 0) {\n        \/\/ \u8655\u7406SET\u547d\u4ee4\n    } else if (strcmp(c-&gt;cmd-&gt;name, \"GET\") == 0) {\n        \/\/ \u8655\u7406GET\u547d\u4ee4\n    }\n}\n<\/code><\/pre>\n<p>\u5728`processCommand`\u51fd\u6578\u4e2d\uff0c\u6839\u64da\u89e3\u6790\u51fa\u7684\u547d\u4ee4\u540d\u7a31\uff0cRedis\u6703\u8abf\u7528\u76f8\u61c9\u7684\u8655\u7406\u51fd\u6578\u4f86\u57f7\u884c\u5177\u9ad4\u7684\u64cd\u4f5c\u3002\u9019\u7a2e\u8a2d\u8a08\u4f7f\u5f97\u547d\u4ee4\u7684\u64f4\u5c55\u6027\u548c\u53ef\u7dad\u8b77\u6027\u90fd\u5f97\u5230\u4e86\u63d0\u5347\u3002<\/p>\n<h2 id=\"%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96-emOFkmOeru\">\u6027\u80fd\u512a\u5316<\/h2>\n<p>Redis\u5728\u8a2d\u8a08\u901a\u4fe1\u5354\u8b70\u6642\uff0c\u8003\u616e\u5230\u4e86\u6027\u80fd\u512a\u5316\u7684\u9700\u6c42\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u975e\u963b\u585eIO\u548c\u4e8b\u4ef6\u9a45\u52d5\u6a21\u578b\u4f86\u8655\u7406\u9ad8\u4e26\u767c\u8acb\u6c42\uff0c\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u4e0a\u4e0b\u6587\u5207\u63db\u7684\u958b\u92b7\u3002\u6b64\u5916\uff0cRESP\u7684\u7c21\u55ae\u683c\u5f0f\u4e5f\u4f7f\u5f97\u89e3\u6790\u904e\u7a0b\u975e\u5e38\u9ad8\u6548\uff0c\u80fd\u5920\u5feb\u901f\u97ff\u61c9\u5ba2\u6236\u7aef\u7684\u8acb\u6c42\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-emOFkmOeru\">\u7e3d\u7d50<\/h2>\n<p>\u901a\u904e\u5c0dRedis\u901a\u4fe1\u5354\u8b70\u6e90\u78bc\u7684\u6df1\u5165\u89e3\u6790\uff0c\u6211\u5011\u53ef\u4ee5\u770b\u5230\u5176\u8a2d\u8a08\u7684\u7cbe\u5999\u4e4b\u8655\u3002RESP\u5354\u8b70\u4e0d\u50c5\u7c21\u55ae\u6613\u7528\uff0c\u9084\u80fd\u5920\u5728\u9ad8\u4e26\u767c\u7684\u74b0\u5883\u4e2d\u4fdd\u6301\u826f\u597d\u7684\u6027\u80fd\u3002\u5c0d\u65bc\u5e0c\u671b\u6df1\u5165\u4e86\u89e3Redis\u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u7814\u7a76\u5176\u6e90\u78bc\u7121\u7591\u662f\u4e00\u500b\u975e\u5e38\u6709\u50f9\u503c\u7684\u904e\u7a0b\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u4e26\u5e0c\u671b\u5728\u9999\u6e2f\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u670d\u52d9\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u89e3\u6790Redis\u901a\u4fe1\u5354\u8b70\u6e90\u78bc\uff0c\u63ed\u793a\u5176\u6838\u5fc3\u7cbe\u9ad3\uff0c\u52a9\u4f60\u5168\u9762\u7406\u89e3Redis\u7684\u9ad8\u6548\u6578\u64da\u50b3\u8f38\u6a5f\u5236\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-164087","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164087","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=164087"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164087\/revisions"}],"predecessor-version":[{"id":164088,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164087\/revisions\/164088"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=164087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=164087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=164087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}