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node.js - Express.js Find URL of client consuming REST API

问题描述

Lets say, I have a server running at: https://example.com The code in server:

const express = require("express");
const app = express();

app.get('/',(req, res)=>{
  let data = {'Hello':'World'}
  res.json(data);
});

app.post('/',(req, res)=>{
  let name = req.body.name;
  let email = req.body.email;
  res.json({name, email});
});

app.listen(3000);

Now, there is a client: https://website.com, trying to access server response by making a GET and POST request. (No API key is required)

How can the server find the web address of the client? In this example, I want the server (example.com) to determine the client's URL (website.com) and save it in the database. req.hostname() is not giving the desired output..

标签： node.jsrestexpress

解决方案

req.hostname是您要查找的内容。

更新：

重新阅读您的问题后，我认为您想要的是识别跨域请求，您将改为使用Origin标题。

var origin = req.get('origin');

请注意，一些跨域请求需要通过“预检”请求进行验证：

req.options('/route', function (req, res) {
    var origin = req.get('origin');
    // ...
});

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