91 lines
2.3 KiB
Rust
91 lines
2.3 KiB
Rust
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use std::iter::FromIterator;
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use http::{HeaderValue, Method};
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use crate::util::FlatCsv;
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/// `Access-Control-Allow-Methods` header, part of
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/// [CORS](http://www.w3.org/TR/cors/#access-control-allow-methods-response-header)
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///
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/// The `Access-Control-Allow-Methods` header indicates, as part of the
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/// response to a preflight request, which methods can be used during the
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/// actual request.
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///
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/// # ABNF
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///
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/// ```text
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/// Access-Control-Allow-Methods: "Access-Control-Allow-Methods" ":" #Method
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/// ```
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///
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/// # Example values
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/// * `PUT, DELETE, XMODIFY`
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///
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/// # Examples
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///
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/// ```
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/// extern crate http;
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/// use http::Method;
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/// use headers::AccessControlAllowMethods;
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///
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/// let allow_methods = vec![Method::GET, Method::PUT]
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/// .into_iter()
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/// .collect::<AccessControlAllowMethods>();
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/// ```
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#[derive(Clone, Debug, PartialEq)]
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pub struct AccessControlAllowMethods(FlatCsv);
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derive_header! {
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AccessControlAllowMethods(_),
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name: ACCESS_CONTROL_ALLOW_METHODS
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}
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impl AccessControlAllowMethods {
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/// Returns an iterator over `Method`s contained within.
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pub fn iter(&self) -> impl Iterator<Item = Method> + '_ {
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self.0.iter().filter_map(|s| s.parse().ok())
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}
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}
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impl FromIterator<Method> for AccessControlAllowMethods {
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fn from_iter<I>(iter: I) -> Self
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where
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I: IntoIterator<Item = Method>,
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{
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let methods = iter
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.into_iter()
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.map(|method| {
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method
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.as_str()
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.parse::<HeaderValue>()
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.expect("Method is a valid HeaderValue")
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})
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.collect();
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AccessControlAllowMethods(methods)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::super::{test_decode, test_encode};
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use super::*;
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#[test]
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fn iter() {
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let allowed = test_decode::<AccessControlAllowMethods>(&["GET, PUT"]).unwrap();
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let as_vec = allowed.iter().collect::<Vec<_>>();
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assert_eq!(as_vec.len(), 2);
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assert_eq!(as_vec[0], Method::GET);
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assert_eq!(as_vec[1], Method::PUT);
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}
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#[test]
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fn from_iter() {
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let allow: AccessControlAllowMethods = vec![Method::GET, Method::PUT].into_iter().collect();
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let headers = test_encode(allow);
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assert_eq!(headers["access-control-allow-methods"], "GET, PUT");
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}
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}
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