add referer typed header

Author: keithamus

actix-web/CHANGES.md

@@ -4,6 +4,7 @@
 
 - Add `http::header::ContentLocation` typed header.
 - Add `http::header::Location` typed header.
+- Add `http::header::Referer` typed header.
 
 ## 4.9.0
 

actix-web/src/http/header/mod.rs

@@ -44,6 +44,7 @@ mod location;
 mod macros;
 mod preference;
 mod range;
+mod referer;
 
 #[cfg(test)]
 pub(crate) use self::macros::common_header_test;
@@ -75,6 +76,7 @@ pub use self::{
     location::Location,
     preference::Preference,
     range::{ByteRangeSpec, Range},
+    referer::Referer,
 };
 
 /// Format writer ([`fmt::Write`]) for a [`BytesMut`].

actix-web/src/http/header/referer.rs

@@ -0,0 +1,36 @@
+use super::{Uri, REFERER};
+
+crate::http::header::common_header! {
+    /// `Referer` header, defined
+    /// in [RFC 7231 §5.5.2](https://datatracker.ietf.org/doc/html/rfc7231#section-5.5.2)
+    ///
+    /// The "Referer" [sic] header field allows the user agent to specify a
+    /// URI reference for the resource from which the target URI was obtained
+    /// (i.e., the "referrer", though the field name is misspelled).
+    ///
+    /// # ABNF
+    /// ```plain
+    /// Referer = absolute-URI / partial-URI
+    /// ```
+    ///
+    /// # Example Values
+    /// * `http://www.example.org/hypertext/Overview.html`
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use actix_web::HttpResponse;
+    /// use actix_http::Uri;
+    /// use actix_web::http::header::Referer;
+    ///
+    /// let mut builder = HttpResponse::Ok();
+    /// builder.insert_header(
+    ///     Referer("http://www.example.org".parse::<Uri>().unwrap())
+    /// );
+    /// ```
+    (Referer, REFERER) => [Uri]
+
+    test_parse_and_format {
+        crate::http::header::common_header_test!(test1, [b"http://www.example.org/hypertext/Overview.html"]);
+    }
+}