pac-resolver

pac-resolver
============

$3

This module accepts a JavaScript String of code, which is meant to be a
[PAC proxy file][pac-wikipedia], and returns a generated asynchronous
FindProxyForURL() function.

Example
-------

Given the PAC proxy file named proxy.pac:

``js
function FindProxyForURL(url, host) {
if (isInNet(myIpAddress(), "10.1.10.0", "255.255.255.0")) {
return "PROXY 1.2.3.4:8080";
} else {
return "DIRECT";
}
}
`

You can consume this PAC file with pac-resolver like so:

`ts
import { readFileSync } from 'fs';
import { createPacResolver } from 'pac-resolver';

const FindProxyForURL = createPacResolver(readFileSync('proxy.pac'));

const res = await FindProxyForURL('http://foo.com/');
console.log(res);
// "DIRECT"
`


API
---

$3

Returns an asynchronous FindProxyForURL() function based off of the given JS
string pacFileContents PAC proxy file. An optional options object may be
passed in which respects the following options:

* filename - String - the filename to use in error stack traces. Defaults to proxy.pac.
* sandbox - Object - a map of functions to include in the sandbox of the
JavaScript environment where the JS code will be executed. i.e. if you wanted to
include the common alert function you could pass alert: console.log. For
async functions, you must set the async = true property on the function
instance, and the JS code will be able to invoke the function as if it were
synchronous.

The qjs parameter is a QuickJS module instance as returned from getQuickJS() from the quickjs-emscripten` module.

[pac-file-docs]: https://web.archive.org/web/20070602031929/http://wp.netscape.com/eng/mozilla/2.0/relnotes/demo/proxy-live.html
[pac-wikipedia]: http://wikipedia.org/wiki/Proxy_auto-config