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use http::{HeaderMap, HeaderValue};
use std::net::IpAddr;
use std::str::FromStr;
use crate::error::{Error, OkOrMessage};
pub fn handle_forwarded_for_headers(headers: &HeaderMap<HeaderValue>) -> Result<String, Error> {
let forwarded_for_header = headers
.get("x-forwarded-for")
.ok_or_message("X-Forwarded-For header not provided")?;
let forwarded_for_ip_str = forwarded_for_header
.to_str()
.ok_or_message("Error parsing X-Forwarded-For header")?;
let client_ip = IpAddr::from_str(forwarded_for_ip_str)
.ok_or_message("Valid IP address not found in X-Forwarded-For header")?;
Ok(client_ip.to_string())
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn test_handle_forwarded_for_headers_ipv4_client() {
let mut test_headers = HeaderMap::new();
test_headers.insert("X-Forwarded-For", "192.0.2.100".parse().unwrap());
if let Ok(forwarded_ip) = handle_forwarded_for_headers(&test_headers) {
assert_eq!(forwarded_ip, "192.0.2.100");
}
}
#[test]
fn test_handle_forwarded_for_headers_ipv6_client() {
let mut test_headers = HeaderMap::new();
test_headers.insert("X-Forwarded-For", "2001:db8::f00d:cafe".parse().unwrap());
if let Ok(forwarded_ip) = handle_forwarded_for_headers(&test_headers) {
assert_eq!(forwarded_ip, "2001:db8::f00d:cafe");
}
}
#[test]
fn test_handle_forwarded_for_headers_invalid_ip() {
let mut test_headers = HeaderMap::new();
test_headers.insert("X-Forwarded-For", "www.example.com".parse().unwrap());
let result = handle_forwarded_for_headers(&test_headers);
assert!(result.is_err());
}
#[test]
fn test_handle_forwarded_for_headers_missing() {
let mut test_headers = HeaderMap::new();
test_headers.insert("Host", "www.deuxfleurs.fr".parse().unwrap());
let result = handle_forwarded_for_headers(&test_headers);
assert!(result.is_err());
}
}
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