Node.js – 從 URL 讀取路徑引數
我們可以將路徑變數嵌入到 URL 中,然後使用這些路徑引數從資源中檢索資訊。這些 API 端點的不同值與內部傳遞的不同值相關。
示例 1
建立一個名為“**index.js**”的檔案,並複製以下程式碼段。建立檔案後,使用命令 “node index.js” 執行此程式碼。
// 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)
})輸出
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)
})輸出
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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