1 files changed, 84 insertions, 0 deletions
diff --git a/third_party/rust/headers/src/common/vary.rs b/third_party/rust/headers/src/common/vary.rs
new file mode 100644
index 0000000000..32b21fe7db
--- /dev/null
+++ b/third_party/rust/headers/src/common/vary.rs
@@ -0,0 +1,84 @@
+use util::FlatCsv;
+
+use HeaderValue;
+
+/// `Vary` header, defined in [RFC7231](https://tools.ietf.org/html/rfc7231#section-7.1.4)
+///
+/// The "Vary" header field in a response describes what parts of a
+/// request message, aside from the method, Host header field, and
+/// request target, might influence the origin server's process for
+/// selecting and representing this response.  The value consists of
+/// either a single asterisk ("*") or a list of header field names
+/// (case-insensitive).
+///
+/// # ABNF
+///
+/// ```text
+/// Vary = "*" / 1#field-name
+/// ```
+///
+/// # Example values
+///
+/// * `accept-encoding, accept-language`
+///
+/// # Example
+///
+/// ```
+/// # extern crate headers;
+/// use headers::Vary;
+///
+/// let vary = Vary::any();
+/// ```
+#[derive(Debug, Clone, PartialEq)]
+pub struct Vary(FlatCsv);
+
+derive_header! {
+    Vary(_),
+    name: VARY
+}
+
+impl Vary {
+    /// Create a new `Very: *` header.
+    pub fn any() -> Vary {
+        Vary(HeaderValue::from_static("*").into())
+    }
+
+    /// Check if this includes `*`.
+    pub fn is_any(&self) -> bool {
+        self.0.iter().any(|val| val == "*")
+    }
+
+    /// Iterate the header names of this `Vary`.
+    pub fn iter_strs(&self) -> impl Iterator<Item = &str> {
+        self.0.iter()
+    }
+}
+
+/*
+test_vary {
+    test_header!(test1, vec![b"accept-encoding, accept-language"]);
+
+    #[test]
+    fn test2() {
+        let mut vary: ::Result<Vary>;
+
+        vary = Header::parse_header(&"*".into());
+        assert_eq!(vary.ok(), Some(Vary::Any));
+
+        vary = Header::parse_header(&"etag,cookie,allow".into());
+        assert_eq!(vary.ok(), Some(Vary::Items(vec!["eTag".parse().unwrap(),
+                                                    "cookIE".parse().unwrap(),
+                                                    "AlLOw".parse().unwrap(),])));
+    }
+}
+*/
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn any_is_any() {
+        assert!(Vary::any().is_any());
+    }
+}