Lib.rs

proxyvars

proxyvars is a parser for the HTTP_PROXY, HTTPS_PROXY and NO_PROXY environment variables, with NO_PROXY matcher based on Go's implementation.

This crate can:

• Read HTTPS_PROXY and HTTP_PROXY and its lowercase variants
• Read, parse and evaluate the NO_PROXY environment variables against a given URL
  • Supports CIDR
  • Supports IPv4/IPv6 address and optinal ports
  • Supports Hostnames and optinal ports
  • Supports Wildcard

Usage

if let Some(no_proxy) = proxyvars::no_proxy() {
    // This environment has NO_PROXY defined
    if no_proxy.matches("https://company.com") {
        // We should not use a proxy for this URL
    } else {
        // We should use a proxy for this URL, which are available at:
        let https_proxy = proxyvars::https_proxy();
        let http_proxy = proxyvars::http_proxy();
    }
}

Notes

1. The implementation of the NO_PROXY matcher is heavily inspired by Go's implementation located at http/httpproxy/proxy.go.
2. It's outside the scope of this crate to actually perform the proxying.