This package aims to make it possible to create simple proxy scripts declaratively. It will never cover all the subtleties. If you have unusual requirements, it is better to write the proxy script directly in JavaScript
ToDo: Build package and publish on pypi
Run this in python:
import os
from pypacer import PyPacer
p = PyPacer()
with open(os.path.join("example.yaml"), "r") as f:
p.load_from_yaml(f.read())
print(p.output())yaml:
description: "Simple proxy"
proxies:
DIRECT:
route: "DIRECT"
targets:
- "10.0.0.0/8"
- ".my-company.com"
MYPROXY:
route: "PROXY proxy.my-company.com:80"
targets:
- "www.my-company.com"
- "contact.my-company.com"
SPECIAL_PROXY:
route: "PROXY proxy.my-company.com:8080"
targets:
- "datacenter.my-company.com"
default: MYPROXYAs a result, you can see that it has resolved the overlap between .my-company.com and,
for example, contact.my-company.com by first evaluating the exact subdomains.
The network mask 10.0.0.0/8 was placed at the end to avoid DNS queries when they are not necessary.
function FindProxyForURL(url, host) {
host = host.toLowerCase();
if (
localHostOrDomainIs(host, "www.my-company.com")
|| localHostOrDomainIs(host, "contact.my-company.com")
) { return "PROXY proxy.my-company.com:80"; }
if (
localHostOrDomainIs(host, "datacenter.my-company.com")
) { return "PROXY proxy.my-company.com:8080"; }
if (
dnsDomainIs(host, ".my-company.com")
) { return "DIRECT"; }
if (
isInNet(host, "10.0.0.0", "255.0.0.0")
) { return "DIRECT"; }
return "PROXY proxy.my-company.com:80";
}You can see all the options supported so far in the test examples.
unittests.yaml:
description: For the unittests, hopefully no real script should look like this. ;)
version: 1.0
default: PROXY_DEFAULT
proxies:
DIRECT:
description: take the direct route
route: "DIRECT"
targets:
- ".example.com"
PROXY_DOMAIN_OVERLAPS:
description: here domains overlap with the default route
route: "PROXY domain-overlaps.example.com"
targets:
- "example.com"
- "foo.example.com"
- "foo.example.net"
PROXY_NETMASK:
description: a proxy for netmask
route: "PROXY netmask.example.com"
targets:
- "93.184.0.0/16"
- "2001:0db8:85a3:08d3::/64"
PROXY_IP:
description: a proxy for IPs
route: "PROXY ip.example.com"
targets:
- "192.0.0.170"
- "127.0.0.1"
PROXY_STRING:
description: a proxy for string matches
route: "PROXY string.example.com"
targets:
- "10."
- ".102.123"
- "10"
PROXY_MIXED:
description: a proxy for mixed matches, this should be split up
route: "PROXY mixed.example.com"
targets:
- "example.net"
- "bar.example.com"
- "bar.example.net"
- "20.10.10.0/24"
- "130.131.132.133"
PROXY_DEFAULT:
description: take the default proxy route
route: "PROXY default.example.com"
targets: []unittests.pac:
function FindProxyForURL(url, host) {
host = host.toLowerCase();
if (
localHostOrDomainIs(host, "example.com")
|| localHostOrDomainIs(host, "foo.example.com")
|| localHostOrDomainIs(host, "foo.example.net")
) { return "PROXY domain-overlaps.example.com"; }
if (
localHostOrDomainIs(host, "example.net")
|| localHostOrDomainIs(host, "bar.example.com")
|| localHostOrDomainIs(host, "bar.example.net")
) { return "PROXY mixed.example.com"; }
if (
dnsDomainIs(host, ".example.com")
) { return "DIRECT"; }
if (
host.substring(0, 3) === "10."
|| host.substring(host.length - 8) === ".102.123"
|| host === "10"
) { return "PROXY string.example.com"; }
if (
dnsResolve(host) === "192.0.0.170"
|| dnsResolve(host) === "127.0.0.1"
) { return "PROXY ip.example.com"; }
if (
isInNet(host, "20.10.10.0", "255.255.255.0")
|| dnsResolve(host) === "130.131.132.133"
) { return "PROXY mixed.example.com"; }
if (
isInNet(host, "93.184.0.0", "255.255.0.0")
|| isInNet(host, "2001:db8:85a3:8d3::", "ffff:ffff:ffff:ffff::")
) { return "PROXY netmask.example.com"; }
return "PROXY default.example.com";
}