make extractor config type explicit

src/types/form.rs

@@ -73,6 +73,7 @@ impl<T> FromRequest for Form<T>
 where
     T: DeserializeOwned + 'static,
 {
+    type Config = FormConfig;
     type Error = Error;
     type Future = Box<Future<Item = Self, Error = Error>>;
 
@@ -115,7 +116,7 @@ impl<T: fmt::Display> fmt::Display for Form<T> {
 ///
 /// ```rust
 /// #[macro_use] extern crate serde_derive;
-/// use actix_web::{web, App, Result};
+/// use actix_web::{web, App, FromRequest, Result};
 ///
 /// #[derive(Deserialize)]
 /// struct FormData {
@@ -133,7 +134,9 @@ impl<T: fmt::Display> fmt::Display for Form<T> {
 ///         web::resource("/index.html")
 ///             .route(web::get()
 ///                 // change `Form` extractor configuration
-///                 .data(web::FormConfig::default().limit(4097))
+///                 .data(
+///                     web::Form::<FormData>::configure(|cfg| cfg.limit(4097))
+///                 )
 ///                 .to(index))
 ///     );
 /// }

src/types/json.rs

@@ -168,6 +168,7 @@ impl<T> FromRequest for Json<T>
 where
     T: DeserializeOwned + 'static,
 {
+    type Config = JsonConfig;
     type Error = Error;
     type Future = Box<Future<Item = Self, Error = Error>>;
 
@@ -205,7 +206,7 @@ where
 ///
 /// ```rust
 /// #[macro_use] extern crate serde_derive;
-/// use actix_web::{error, web, App, HttpResponse};
+/// use actix_web::{error, web, App, FromRequest, HttpResponse};
 ///
 /// #[derive(Deserialize)]
 /// struct Info {
@@ -222,11 +223,13 @@ where
 ///         web::resource("/index.html").route(
 ///             web::post().data(
 ///                 // change json extractor configuration
-///                 web::JsonConfig::default().limit(4096)
-///                     .error_handler(|err, req| {  // <- create custom error response
-///                         error::InternalError::from_response(
-///                             err, HttpResponse::Conflict().finish()).into()
-///                     }))
+///                 web::Json::<Info>::configure(|cfg| {
+///                     cfg.limit(4096)
+///                        .error_handler(|err, req| {  // <- create custom error response
+///                             error::InternalError::from_response(
+///                                 err, HttpResponse::Conflict().finish()).into()
+///                        })
+///                 }))
 ///                 .to(index))
 ///     );
 /// }

src/types/path.rs

@@ -156,6 +156,7 @@ impl<T> FromRequest for Path<T>
 where
     T: de::DeserializeOwned,
 {
+    type Config = ();
     type Error = Error;
     type Future = Result<Self, Error>;
 

src/types/payload.rs

@@ -86,6 +86,7 @@ impl Stream for Payload {
 /// }
 /// ```
 impl FromRequest for Payload {
+    type Config = PayloadConfig;
     type Error = Error;
     type Future = Result<Payload, Error>;
 
@@ -121,6 +122,7 @@ impl FromRequest for Payload {
 /// }
 /// ```
 impl FromRequest for Bytes {
+    type Config = PayloadConfig;
     type Error = Error;
     type Future =
         Either<Box<Future<Item = Bytes, Error = Error>>, FutureResult<Bytes, Error>>;
@@ -156,7 +158,7 @@ impl FromRequest for Bytes {
 /// ## Example
 ///
 /// ```rust
-/// use actix_web::{web, App};
+/// use actix_web::{web, App, FromRequest};
 ///
 /// /// extract text data from request
 /// fn index(text: String) -> String {
@@ -167,12 +169,15 @@ impl FromRequest for Bytes {
 ///     let app = App::new().service(
 ///         web::resource("/index.html").route(
 ///             web::get()
-///                .data(web::PayloadConfig::new(4096)) // <- limit size of the payload
+///                .data(String::configure(|cfg| {  // <- limit size of the payload
+///                    cfg.limit(4096)
+///                 }))
 ///                .to(index))  // <- register handler with extractor params
 ///     );
 /// }
 /// ```
 impl FromRequest for String {
+    type Config = PayloadConfig;
     type Error = Error;
     type Future =
         Either<Box<Future<Item = String, Error = Error>>, FutureResult<String, Error>>;
@@ -228,7 +233,9 @@ pub struct PayloadConfig {
 impl PayloadConfig {
     /// Create `PayloadConfig` instance and set max size of payload.
     pub fn new(limit: usize) -> Self {
-        Self::default().limit(limit)
+        let mut cfg = Self::default();
+        cfg.limit = limit;
+        cfg
     }
 
     /// Change max size of payload. By default max size is 256Kb

src/types/query.rs

@@ -115,6 +115,7 @@ impl<T> FromRequest for Query<T>
 where
     T: de::DeserializeOwned,
 {
+    type Config = ();
     type Error = Error;
     type Future = Result<Self, Error>;