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use http::Method;
use {Header, HeaderName, HeaderValue};
/// `Access-Control-Request-Method` header, part of
///
/// The `Access-Control-Request-Method` header indicates which method will be
/// used in the actual request as part of the preflight request.
/// # ABNF
///
/// ```text
/// Access-Control-Request-Method: \"Access-Control-Request-Method\" \":\" Method
/// ```
///
/// # Example values
/// * `GET`
///
/// # Examples
///
/// ```
/// # extern crate headers;
/// extern crate http;
/// use headers::AccessControlRequestMethod;
/// use http::Method;
///
/// let req_method = AccessControlRequestMethod::from(Method::GET);
/// ```
#[derive(Clone, Debug, PartialEq, Eq, Hash)]
pub struct AccessControlRequestMethod(Method);
impl Header for AccessControlRequestMethod {
fn name() -> &'static HeaderName {
&::http::header::ACCESS_CONTROL_REQUEST_METHOD
}
fn decode<'i, I: Iterator<Item = &'i HeaderValue>>(values: &mut I) -> Result<Self, ::Error> {
values
.next()
.and_then(|value| Method::from_bytes(value.as_bytes()).ok())
.map(AccessControlRequestMethod)
.ok_or_else(::Error::invalid)
}
fn encode<E: Extend<::HeaderValue>>(&self, values: &mut E) {
// For the more common methods, try to use a static string.
let s = match self.0 {
Method::GET => "GET",
Method::POST => "POST",
Method::PUT => "PUT",
Method::DELETE => "DELETE",
_ => {
let val = HeaderValue::from_str(self.0.as_ref())
.expect("Methods are also valid HeaderValues");
values.extend(::std::iter::once(val));
return;
}
};
values.extend(::std::iter::once(HeaderValue::from_static(s)));
}
}
impl From<Method> for AccessControlRequestMethod {
fn from(method: Method) -> AccessControlRequestMethod {
AccessControlRequestMethod(method)
}
}
impl From<AccessControlRequestMethod> for Method {
fn from(method: AccessControlRequestMethod) -> Method {
method.0
}
}