add extractors info to guide

src/json.rs

@@ -47,9 +47,7 @@ use httpresponse::HttpResponse;
 /// ## Example
 ///
 /// ```rust
-/// # extern crate bytes;
 /// # extern crate actix_web;
-/// # extern crate futures;
 /// #[macro_use] extern crate serde_derive;
 /// use actix_web::{App, Json, Result, http};
 ///

src/pred.rs

@@ -8,7 +8,8 @@ use httprequest::HttpRequest;
 
 /// Trait defines resource route predicate.
 /// Predicate can modify request object. It is also possible to
-/// to store extra attributes on request by using `.extensions()` method.
+/// to store extra attributes on request by using `Extensions` container,
+/// Extensions container available via `HttpRequest::extensions()` method.
 pub trait Predicate<S> {
 
     /// Check if request matches predicate

src/server/mod.rs

@@ -126,12 +126,16 @@ impl HttpHandler for Box<HttpHandler> {
     }
 }
 
+#[doc(hidden)]
 pub trait HttpHandlerTask {
 
+    /// Poll task, this method is used before or after *io* object is available
     fn poll(&mut self) -> Poll<(), Error>;
 
+    /// Poll task when *io* object is available
     fn poll_io(&mut self, io: &mut Writer) -> Poll<bool, Error>;
 
+    /// Connection is disconnected
     fn disconnected(&mut self);
 }
 
@@ -152,12 +156,14 @@ impl<T: HttpHandler> IntoHttpHandler for T {
     }
 }
 
+#[doc(hidden)]
 #[derive(Debug)]
 pub enum WriterState {
     Done,
     Pause,
 }
 
+#[doc(hidden)]
 /// Stream writer
 pub trait Writer {
     fn written(&self) -> u64;
@@ -172,6 +178,7 @@ pub trait Writer {
     fn poll_completed(&mut self, shutdown: bool) -> Poll<(), io::Error>;
 }
 
+#[doc(hidden)]
 /// Low-level io stream operations
 pub trait IoStream: AsyncRead + AsyncWrite + 'static {
     fn shutdown(&mut self, how: Shutdown) -> io::Result<()>;

src/ws/mod.rs

@@ -10,7 +10,7 @@
 //! # extern crate actix_web;
 //! # use actix::*;
 //! # use actix_web::*;
-//! use actix_web::ws;
+//! use actix_web::{ws, HttpRequest, HttpResponse};
 //!
 //! // do websocket handshake and start actor
 //! fn ws_index(req: HttpRequest) -> Result<HttpResponse> {