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-rw-r--r--src/util/forwarded_headers.rs63
1 files changed, 63 insertions, 0 deletions
diff --git a/src/util/forwarded_headers.rs b/src/util/forwarded_headers.rs
new file mode 100644
index 00000000..6ae275aa
--- /dev/null
+++ b/src/util/forwarded_headers.rs
@@ -0,0 +1,63 @@
+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());
+ }
+}