{"id":167781,"date":"2024-11-06T05:49:25","date_gmt":"2024-11-05T21:49:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/167781\/"},"modified":"2024-11-06T05:49:25","modified_gmt":"2024-11-05T21:49:25","slug":"%e5%88%a9%e7%94%a8redis%e7%8e%a9%e8%bd%89%e9%95%b7%e6%99%82%e9%96%93%e9%8f%88%e6%8e%a5%ef%bc%88redis%e7%b7%a9%e5%ad%98%e9%95%b7%e6%99%82%e9%96%93%e9%8f%88%e6%8e%a5%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/167781\/","title":{"rendered":"\u5229\u7528Redis\u73a9\u8f49\u9577\u6642\u9593\u93c8\u63a5\uff08redis\u7de9\u5b58\u9577\u6642\u9593\u93c8\u63a5\uff09"},"content":{"rendered":"<h1 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id=\"%e5%af%a6%e7%8f%be%e7%a4%ba%e4%be%8b-cHZXwYoNIx\">\u5be6\u73fe\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528Redis\u4f86\u7de9\u5b58\u9577\u6642\u9593\u93c8\u63a5\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>const redis = require('redis');\nconst express = require('express');\nconst app = express();\nconst client = redis.createClient();\n\napp.get('\/long-polling', (req, res) =&gt; {\n    const userId = req.query.userId;\n\n    \/\/ \u6aa2\u67e5Redis\u4e2d\u662f\u5426\u6709\u65b0\u6d88\u606f\n    client.get(`newMessages:${userId}`, (err, messages) =&gt; {\n        if (err) {\n            return res.status(500).send('Error checking messages');\n        }\n\n        if (messages) {\n            \/\/ \u5982\u679c\u6709\u65b0\u6d88\u606f\uff0c\u8fd4\u56de\u4e26\u6e05\u9664Redis\u4e2d\u7684\u6d88\u606f\n            client.del(`newMessages:${userId}`);\n            return res.json({ messages: JSON.parse(messages) });\n        }\n\n        \/\/ \u5982\u679c\u6c92\u6709\u65b0\u6d88\u606f\uff0c\u8a2d\u7f6e\u4e00\u500b\u8d85\u6642\n        setTimeout(() =&gt; {\n            res.json({ messages: [] });\n        }, 30000); \/\/ 30\u79d2\u8d85\u6642\n    });\n});\n\napp.listen(3000, () =&gt; {\n    console.log('Server is running on port 3000');\n});<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-cHZXwYoNIx\">\u7e3d\u7d50<\/h2>\n<p>\u5229\u7528Redis\u4f86\u7de9\u5b58\u9577\u6642\u9593\u93c8\u63a5\u7684\u6578\u64da\uff0c\u4e0d\u50c5\u80fd\u63d0\u9ad8\u7cfb\u7d71\u7684\u6027\u80fd\uff0c\u9084\u80fd\u6709\u6548\u5730\u7ba1\u7406\u5373\u6642\u6578\u64da\u7684\u63a8\u9001\u3002\u96a8\u8457\u7db2\u7d61\u61c9\u7528\u9700\u6c42\u7684\u589e\u9577\uff0cRedis\u7684\u61c9\u7528\u5834\u666f\u5c07\u6703\u8d8a\u4f86\u8d8a\u5ee3\u6cdb\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\uff0c\u8003\u616e\u4f7f\u7528<a 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