Vercel-Proxy 🚀🚀🚀

A simple proxy for Vercel to bypass CORS restrictions.

Limit

1. Vercel Serverless Function Payload Size Limit is 4.5 MB, large payload will be rejected by response status code 413.

https://vercel.com/docs/concepts/limits/overview#serverless-function-payload-size-limit

Origin white list

if process.env?.CORS not exists, the proxy will accept all requests

process.env?.CORS should be a string arr, split by ,. like a.com,b.com,c.com

Usage

for example, you want to access https://target.com/path(the origin url which you want to call, $ProxyHost/path ) with proxy https://proxy.vercel.com(the url where you serve the Vercel-Proxy, $Host )

1. curl $Host/path?proxy=$ProxyHost

curl https://proxy.vercel.com/path?proxy=https://target.com

2. curl --header "Proxy: $ProxyHost" $Host/path

curl --header "Proxy: https://target.com" https://proxy.vercel.com/path

Dev Example

launch the proxy server locally at http://localhost:3003, and try

curl --header "Proxy: https://ipinfo.io" http://localhost:3003/161.186.160.93/geo

curl http://localhost:3003/161.186.160.93/geo\?proxy\=https://ipinfo.io

if you receive this json data, which means the proxy works.

{
  "ip": "161.186.160.93",
  "city": "Washington",
  "region": "Washington, D.C.",
  "country": "US",
  "loc": "38.8951,-77.0364",
  "postal": "20068",
  "timezone": "America/New_York",
  "readme": "https://ipinfo.io/missingauth"
}

drafish / vercel-proxy