File size: 1,262 Bytes
1e92f2d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | import net from 'net'
import type { Addresses, RestoreOriginalFunction } from './types'
/**
* Proxy the TCP connect method to determine if any network access is made during the build
*
* @param addresses An array to track the addresses that are accessed.
* @returns A function that restores the original connect method.
*/
export function tcpProxy(addresses: Addresses): RestoreOriginalFunction {
// net.Socket docs https://nodejs.org/api/net.html#class-netsocket
const originalConnect = net.Socket.prototype.connect
// Override the connect method
net.Socket.prototype.connect = function (...args: any) {
// First, check if the first argument is an object and not null
if (typeof args[0] === 'object' && args[0] !== null) {
const options = args[0] as net.SocketConnectOpts
// check if the options has what we need
if (
'port' in options &&
options.port !== undefined &&
'host' in options &&
options.host !== undefined
) {
addresses.push({ addr: options.host, port: options.port.toString() })
}
}
return originalConnect.apply(this, args)
}
return () => {
// Restore the original connect method
net.Socket.prototype.connect = originalConnect
}
}
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