x_read_ip

#![feature(doc_auto_cfg)]
#![feature(doc_cfg)]

use std::{borrow::Borrow, net::IpAddr};

use http::HeaderMap;

pub fn get(headers: impl Borrow<HeaderMap>) -> Vec<u8> {
  let header_candidates = ["x-forwarded-for", "x-real-ip", "cf-connecting-ip"];

  for header_name in header_candidates {
    if let Some(header_value) = headers.borrow().get(header_name) {
      if let Ok(raw_str) = header_value.to_str() {
        let ip_str = raw_str.split(',').next().unwrap_or("").trim();

        if let Ok(ip) = ip_str.parse::<IpAddr>() {
          return match ip {
            IpAddr::V4(ipv4) => ipv4.octets().to_vec(),
            IpAddr::V6(ipv6) => ipv6.octets().to_vec(),
          };
        }
      }
    }
  }

  vec![]
}

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This project is an open-source component of i18n.site ⋅ Internationalization Solution.

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