{"id":189386,"date":"2024-11-12T07:19:21","date_gmt":"2024-11-11T23:19:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/189386\/"},"modified":"2024-11-12T07:19:22","modified_gmt":"2024-11-11T23:19:22","slug":"%e7%b5%b1%e8%a8%88%e5%9c%a8%e7%b7%9a%e8%a8%ad%e5%82%99redis%e5%af%a6%e7%8f%be%ef%bc%88redis-%e7%b5%b1%e8%a8%88%e5%9c%a8%e7%b7%9a%e8%a8%ad%e5%82%99%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/189386\/","title":{"rendered":"\u7d71\u8a08\u5728\u7dda\u8a2d\u5099Redis\u5be6\u73fe\uff08redis \u7d71\u8a08\u5728\u7dda\u8a2d\u5099\uff09"},"content":{"rendered":"<h1 id=\"%e7%b5%b1%e8%a8%88%e5%9c%a8%e7%b7%9a%e8%a8%ad%e5%82%99redis%e5%af%a6%e7%8f%be%ef%bc%88redis-%e7%b5%b1%e8%a8%88%e5%9c%a8%e7%b7%9a%e8%a8%ad%e5%82%99%ef%bc%89-xpPXHlupSN\">\u7d71\u8a08\u5728\u7dda\u8a2d\u5099Redis\u5be6\u73fe\uff08redis \u7d71\u8a08\u5728\u7dda\u8a2d\u5099\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u5be6\u6642\u7d71\u8a08\u5728\u7dda\u8a2d\u5099\u7684\u9700\u6c42\u65e5\u76ca\u589e\u52a0\u3002Redis\uff0c\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u56e0\u5176\u5feb\u901f\u7684\u8b80\u5beb\u6027\u80fd\u548c\u9748\u6d3b\u7684\u6578\u64da\u7d50\u69cb\uff0c\u6210\u70ba\u4e86\u5be6\u73fe\u5728\u7dda\u8a2d\u5099\u7d71\u8a08\u7684\u7406\u60f3\u9078\u64c7\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528Redis\u4f86\u7d71\u8a08\u5728\u7dda\u8a2d\u5099\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%e6%a6%82%e5%bf%b5-xpPXHlupSN\">Redis\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>Redis\uff08REmote DIctionary Server\uff09\u662f\u4e00\u500b\u958b\u6e90\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u652f\u6301\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5982\u5b57\u7b26\u4e32\u3001\u54c8\u5e0c\u3001\u5217\u8868\u3001\u96c6\u5408\u548c\u6709\u5e8f\u96c6\u5408\u3002\u7531\u65bc\u5176\u9ad8\u6548\u7684\u6027\u80fd\uff0cRedis\u88ab\u5ee3\u6cdb\u61c9\u7528\u65bc\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u5be6\u6642\u6578\u64da\u5206\u6790\u7b49\u5834\u666f\u3002<\/p>\n<h2 id=\"%e5%9c%a8%e7%b7%9a%e8%a8%ad%e5%82%99%e7%b5%b1%e8%a8%88%e7%9a%84%e9%9c%80%e6%b1%82-xpPXHlupSN\">\u5728\u7dda\u8a2d\u5099\u7d71\u8a08\u7684\u9700\u6c42<\/h2>\n<p>\u5728\u7dda\u8a2d\u5099\u7d71\u8a08\u901a\u5e38\u6d89\u53ca\u5230\u4ee5\u4e0b\u5e7e\u500b\u65b9\u9762\uff1a<\/p>\n<ul>\n<li>\u5be6\u6642\u76e3\u63a7\u8a2d\u5099\u7684\u5728\u7dda\u72c0\u614b<\/li>\n<li>\u7d71\u8a08\u8a2d\u5099\u7684\u6d3b\u8e8d\u7528\u6236\u6578<\/li>\n<li>\u5206\u6790\u8a2d\u5099\u7684\u4f7f\u7528\u8da8\u52e2<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u9700\u6c42\u4fc3\u4f7f\u958b\u767c\u8005\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u4ee5\u4fbf\u80fd\u5920\u5feb\u901f\u7372\u53d6\u548c\u8655\u7406\u6578\u64da\u3002Redis\u7684\u9ad8\u6027\u80fd\u7279\u6027\u4f7f\u5176\u6210\u70ba\u9019\u4e9b\u9700\u6c42\u7684\u7406\u60f3\u9078\u64c7\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8redis%e7%b5%b1%e8%a8%88%e5%9c%a8%e7%b7%9a%e8%a8%ad%e5%82%99%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%80%9d%e8%b7%af-xpPXHlupSN\">\u4f7f\u7528Redis\u7d71\u8a08\u5728\u7dda\u8a2d\u5099\u7684\u57fa\u672c\u601d\u8def<\/h2>\n<p>\u4f7f\u7528Redis\u4f86\u7d71\u8a08\u5728\u7dda\u8a2d\u5099\u7684\u57fa\u672c\u601d\u8def\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\u7576\u8a2d\u5099\u4e0a\u7dda\u6642\uff0c\u5c07\u5176ID\u5b58\u5132\u5230Redis\u4e2d\uff0c\u4e26\u8a2d\u7f6e\u4e00\u500b\u904e\u671f\u6642\u9593\uff0c\u4ee5\u4fbf\u81ea\u52d5\u6e05\u9664\u4e0d\u518d\u5728\u7dda\u7684\u8a2d\u5099\u3002<\/li>\n<li>\u7576\u8a2d\u5099\u4e0b\u7dda\u6642\uff0c\u5f9eRedis\u4e2d\u522a\u9664\u5176ID\u3002<\/li>\n<li>\u5b9a\u671f\u67e5\u8a62Redis\u4e2d\u7684\u8a2d\u5099ID\uff0c\u4ee5\u7372\u53d6\u7576\u524d\u5728\u7dda\u8a2d\u5099\u7684\u6578\u91cf\u548c\u8a73\u7d30\u4fe1\u606f\u3002<\/li>\n<\/ol>\n<h2 id=\"%e5%af%a6%e7%8f%be%e7%a4%ba%e4%be%8b-xpPXHlupSN\">\u5be6\u73fe\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684Python\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528Redis\u4f86\u7d71\u8a08\u5728\u7dda\u8a2d\u5099\uff1a<\/p>\n<pre><code>import redis\nimport time\n\n# \u9023\u63a5\u5230Redis\nr = redis.StrictRedis(host='localhost', port=6379, db=0)\n\n# \u8a2d\u5099ID\ndevice_id = 'device_123'\n\n# \u8a2d\u5099\u4e0a\u7dda\ndef device_online(device_id):\n    r.set(device_id, 'online', ex=300)  # \u8a2d\u7f6e\u904e\u671f\u6642\u9593\u70ba300\u79d2\n\n# \u8a2d\u5099\u4e0b\u7dda\ndef device_offline(device_id):\n    r.delete(device_id)\n\n# \u7372\u53d6\u5728\u7dda\u8a2d\u5099\u6578\u91cf\ndef get_online_devices_count():\n    return len(r.keys())\n\n# \u6a21\u64ec\u8a2d\u5099\u4e0a\u7dda\u548c\u4e0b\u7dda\ndevice_online(device_id)\ntime.sleep(10)  # \u6a21\u64ec\u8a2d\u5099\u5728\u7dda10\u79d2\ndevice_offline(device_id)\n\n# \u7372\u53d6\u5728\u7dda\u8a2d\u5099\u6578\u91cf\nprint(\"\u7576\u524d\u5728\u7dda\u8a2d\u5099\u6578\u91cf:\", get_online_devices_count())\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528Redis\u7684`set`\u65b9\u6cd5\u4f86\u5b58\u5132\u8a2d\u5099ID\uff0c\u4e26\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u3002\u7576\u8a2d\u5099\u4e0b\u7dda\u6642\uff0c\u6211\u5011\u4f7f\u7528`delete`\u65b9\u6cd5\u522a\u9664\u8a2d\u5099ID\u3002\u6700\u5f8c\uff0c\u6211\u5011\u4f7f\u7528`keys`\u65b9\u6cd5\u4f86\u7372\u53d6\u7576\u524d\u5728\u7dda\u8a2d\u5099\u7684\u6578\u91cf\u3002<\/p>\n<h2 id=\"%e5%84%aa%e5%8c%96%e5%bb%ba%e8%ad%b0-xpPXHlupSN\">\u512a\u5316\u5efa\u8b70<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u70ba\u4e86\u63d0\u9ad8\u6027\u80fd\u548c\u53ef\u64f4\u5c55\u6027\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u512a\u5316\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528Redis\u7684\u767c\u5e03\/\u8a02\u95b1\u529f\u80fd\u4f86\u5be6\u6642\u63a8\u9001\u5728\u7dda\u8a2d\u5099\u7684\u8b8a\u5316\u3002<\/li>\n<li>\u6839\u64da\u696d\u52d9\u9700\u6c42\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u7d50\u69cb\u4f86\u5b58\u5132\u8a2d\u5099\u4fe1\u606f\uff0c\u4f8b\u5982\u4f7f\u7528\u54c8\u5e0c\u4f86\u5b58\u5132\u8a2d\u5099\u7684\u8a73\u7d30\u4fe1\u606f\u3002<\/li>\n<li>\u5b9a\u671f\u6e05\u7406\u904e\u671f\u7684\u8a2d\u5099ID\uff0c\u4ee5\u91cb\u653eRedis\u7684\u5167\u5b58\u8cc7\u6e90\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-xpPXHlupSN\">\u7e3d\u7d50<\/h2>\n<p>Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u70ba\u5728\u7dda\u8a2d\u5099\u7684\u7d71\u8a08\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u652f\u6301\u3002\u901a\u904e\u7c21\u55ae\u7684\u64cd\u4f5c\uff0c\u6211\u5011\u53ef\u4ee5\u5be6\u73fe\u5be6\u6642\u7684\u5728\u7dda\u8a2d\u5099\u76e3\u63a7\u548c\u7d71\u8a08\u3002\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u589e\u9577\uff0cRedis\u7684\u9748\u6d3b\u6027\u548c\u9ad8\u6027\u80fd\u5c07\u4f7f\u5176\u5728\u5728\u7dda\u8a2d\u5099\u7d71\u8a08\u4e2d\u767c\u63ee\u8d8a\u4f86\u8d8a\u91cd\u8981\u7684\u4f5c\u7528\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u9999\u6e2f\u4f7f\u7528<a href=\"https:\/\/server.hk\">VPS<\/a>\u4f86\u90e8\u7f72Redis\u6709\u8208\u8da3\uff0c\u6216\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u4f7f\u7528Redis\u5be6\u73fe\u5728\u7dda\u8a2d\u5099\u7d71\u8a08\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u5be6\u73fe\u5be6\u6642\u76e3\u63a7\u8207\u5206\u6790\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-189386","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189386","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=189386"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189386\/revisions"}],"predecessor-version":[{"id":189387,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189386\/revisions\/189387"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=189386"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=189386"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=189386"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}