Create Proxy Server

Creating and deploying a tiny proxy server on Vercel in 10 minutes · mmazzarolo.com

项目设置

```bash mkdir my-proxy && cd my-proxy npm init npm install -D vercel mkdir api && touch api/index.js touch vercel.json ```

my-proxy/package.json

```json { "name": "my-proxy", "version": "1.0.0", "scripts": {

"start": "vercel dev" },

```

Vercel serverless functions use a file-system-based convention. So the api/index.js file you just created will automatically handle all requests of the /api endpoint:

my-proxy/api/index.js

```js // In Vercel, any file inside the "api" directory is exposed on an "/api" endpoint. // For an API route to work, you need to export a function as default (a.k.a request handler), // which then receives the following parameters: // - req: The request object. // - res: The response object. // See https://vercel.com/docs/serverless-functions/supported-languages#node.js for details. export default async function handler(req, res) { res.status(200).send(`Hello world!`) } ```

my-proxy/vercel.json

```json { "rewrites": [{ "source": "api(.*)", "destination": "/api" }] } ```

代理逻辑设置

```bash npm i http-proxy-middleware ```

修改 my-proxy/api/index.js

```js // Create a proxy to redirect requests of the "api**" path to "https://example.org". // // Examples: // GET /api/hello → GET https://example.org/hello // POST /api/test?color=red → POST https://example.org/test?color=red // // Additionally, the proxy will: // - Add an "x-added" header // - Remove the "x-removed" header // From the proxied response. // // You can/should update the proxy to suit your needs. // See https://github.com/chimurai/http-proxy-middleware for more details. const { createProxyMiddleware } = require('http-proxy-middleware') const apiProxy = createProxyMiddleware({ target: 'https://example.org', changeOrigin: true, pathRewrite: { '^/api': '', // strip "/api" from the URL }, onProxyRes(proxyRes) { proxyRes.headers['x-added'] = 'foobar' // add new header to response delete proxyRes.headers['x-removed'] // remove header from response }, }) // Expose the proxy on the "api**" endpoint. export default function (req, res) { return apiProxy(req, res) } ```