1 files changed, 54 insertions, 0 deletions
diff --git a/third_party/rust/headers/src/common/host.rs b/third_party/rust/headers/src/common/host.rs
new file mode 100644
index 0000000000..a5c41b1d1a
--- /dev/null
+++ b/third_party/rust/headers/src/common/host.rs
@@ -0,0 +1,54 @@
+use std::fmt;
+use std::convert::TryFrom;
+
+use http::uri::Authority;
+
+/// The `Host` header.
+#[derive(Clone, Debug, PartialEq, Eq, Hash, PartialOrd)]
+pub struct Host(Authority);
+
+impl Host {
+    /// Get the hostname, such as example.domain.
+    pub fn hostname(&self) -> &str {
+        self.0.host()
+    }
+
+    /// Get the optional port number.
+    pub fn port(&self) -> Option<u16> {
+        self.0.port_u16()
+    }
+}
+
+impl ::Header for Host {
+    fn name() -> &'static ::HeaderName {
+        &::http::header::HOST
+    }
+
+    fn decode<'i, I: Iterator<Item = &'i ::HeaderValue>>(values: &mut I) -> Result<Self, ::Error> {
+        values
+            .next()
+            .cloned()
+            .and_then(|val| Authority::try_from(val.as_bytes()).ok())
+            .map(Host)
+            .ok_or_else(::Error::invalid)
+    }
+
+    fn encode<E: Extend<::HeaderValue>>(&self, values: &mut E) {
+        let bytes = self.0.as_str().as_bytes();
+        let val = ::HeaderValue::from_bytes(bytes).expect("Authority is a valid HeaderValue");
+
+        values.extend(::std::iter::once(val));
+    }
+}
+
+impl From<Authority> for Host {
+    fn from(auth: Authority) -> Host {
+        Host(auth)
+    }
+}
+
+impl fmt::Display for Host {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Display::fmt(&self.0, f)
+    }
+}