Express.js – 獲取遠端客戶端地址
應用程式需要維護遠端客戶端地址,以管理計算機系統的請求數量並跟蹤其使用情況。但有時,伺服器在 NGINX 伺服器後面執行,因此我們需要檢查其轉發請求。為此,我們可以使用“x-forwarded-for”
語法
req.headers['x-forwarded-for'] || req.socket.remoteAddress
如果此代理不屬於您,則在使用x-forwarded-for標頭時應小心,因為它可能會被欺騙。
示例 1
建立一個名為“remoteAddress.js”的檔案並複製以下程式碼段。建立檔案後,使用命令“node remoteAddress.js”執行此程式碼,如下例所示 −
// req.query() Demo Example // Importing the express module var express = require('express'); // Initializing the express and port number var app = express(); var PORT = 3000; // Getting the request query string app.get('/api', function(req, res){ console.log('id: ' + req.query.id) res.send('id: ' + req.query.id); }); // Listening to the port app.listen(PORT, function(err){ if (err) console.log(err); console.log("Server listening on PORT", PORT); });
在以下端點發出 Get 請求 - https://:3000/
輸出
C:\home
ode>> node remoteAddress.js Server listening on PORT 3000 IP Address: ::ffff:127.0.0.1
示例 2
我們來看另一個示例。
// express.raw() Demo Example // Importing the express module var express = require('express'); // Initializing the express and port number var app = express(); var PORT = 3000; app.get('/api*', function (req, res){ var ip = req.headers['x-forwarded-for'] || req.socket.remoteAddress console.log('IP Address: ' + ip) }); // Listening to the port app.listen(PORT, function(err){ if (err) console.log(err); console.log("Server listening on PORT", PORT); }); app.get('/', function (req, res){ var forwardedIpsStr = req.header('x-forwarded-for'); var IP = ''; if (forwardedIpsStr) { IP = forwardedIps = forwardedIpsStr.split(',')[0]; } });
對以下任何端點發出 Get 請求 –
https://:3000/api https://:3000/api/v2 https://:3000/api/v3 and so on...
它會將所有端點與/api進行比較並跟蹤它。
輸出
C:\home
ode>> node remoteAddress.js Server listening on PORT 3000 IP Address: ::ffff:127.0.0.1 IP Address: ::ffff:127.0.0.1 IP Address: ::ffff:127.0.0.1
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