Node.js – 从 URL 读取路径参数
我们可以将路径变量嵌入到 URL 中,然后使用这些路径参数从资源中检索信息。这些 API 端点的不同值与内部传递的不同值相关。
示例 1
创建一个名为“**index.js**”的文件,并复制以下代码段。创建文件后,使用命令 “node index.js” 运行此代码。
// Reading Path parameters in Node.js // Importing the below modules const express = require("express") const path = require('path') const app = express() var PORT = process.env.port || 3001 app.get('/p/:tagId', function(req, res) { console.log("TagId received is : " + req.params.tagId); res.send("TagId is set to " + req.params.tagId); }); app.listen(PORT, function(error){ if (error) throw error console.log("Server running successfully on PORT : ", PORT) })
输出
C:\home
ode>> node index.js Server running successfully on PORT: 3001 TagId received is: 1
示例 2
// Reading Path parameters in Node.js // Importing the below modules const express = require("express") const path = require('path') const app = express() var PORT = process.env.port || 3001 app.get('/p/:id/:username/:password', function(req, res) { var user_id = req.params['id'] var username = req.params['username'] var password = req.params['password'] console.log("UserId is : " + user_id + " username is : " + username + " password is : " + password); res.send("UserId is : " + user_id + " username is : " + username + " password is : " + password); }); app.listen(PORT, function(error){ if (error) throw error console.log("Server running successfully on PORT : ", PORT) })
输出
C:\home
ode>> node index.js Server running successfully on PORT : 3001 UserId is : 21 username is : Rahul password is : Rahul@021
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