Rename cookies::CookiesExt to ContextExt

As discussed in http-rs#187, context extension traits should have an import
path that explains their functionality, while being named after the
traits they extend.

Signed-off-by: Nicholas Young <nyoung@uptime.ventures>

src/cookies.rs

@@ -28,7 +28,7 @@ impl CookieData {
 }
 
 /// An extension to `Context` that provides cached access to cookies
-pub trait CookiesExt {
+pub trait ContextExt {
     /// returns a `Cookie` by name of the cookie
     fn get_cookie(&mut self, name: &str) -> Result<Option<Cookie<'static>>, StringError>;
 
@@ -40,7 +40,7 @@ pub trait CookiesExt {
     fn remove_cookie(&mut self, cookie: Cookie<'static>) -> Result<(), StringError>;
 }
 
-impl<State> CookiesExt for Context<State> {
+impl<State> ContextExt for Context<State> {
     fn get_cookie(&mut self, name: &str) -> Result<Option<Cookie<'static>>, StringError> {
         let cookie_data = self
             .extensions()

src/middleware/cookies.rs

@@ -9,7 +9,7 @@ use crate::{
 
 /// Middleware to work with cookies.
 ///
-/// [`CookiesMiddleware`] along with [`CookiesExt`](crate::cookies::CookiesExt) provide smooth
+/// [`CookiesMiddleware`] along with [`ContextExt`](crate::cookies::ContextExt) provide smooth
 /// access to request cookies and setting/removing cookies from response. This leverages the
 /// [cookie](https://crates.io/crates/cookie) crate.
 /// This middleware parses cookies from request and caches them in the extension. Once the request
@@ -63,7 +63,7 @@ impl<Data: Send + Sync + 'static> Middleware<Data> for CookiesMiddleware {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::{cookies::CookiesExt, Context};
+    use crate::{cookies::ContextExt, Context};
     use cookie::Cookie;
     use futures::executor::block_on;
     use http_service::Body;