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

更新日期: 17-8-2021

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