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app data doc improvements

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Rob Ede 2021-06-24 15:10:51 +01:00
parent 083ee05d50
commit 2d8d2f5ab0
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8 changed files with 181 additions and 137 deletions
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85
src/app.rs
View file

@ -68,36 +68,71 @@ where
InitError = (),
>,
{
/// Set application data. Application data could be accessed
/// by using `Data<T>` extractor where `T` is data type.
/// Set application (root level) data.
///
/// **Note**: HTTP server accepts an application factory rather than
/// an application instance. Http server constructs an application
/// instance for each thread, thus application data must be constructed
/// multiple times. If you want to share data between different
/// threads, a shared object should be used, e.g. `Arc`. Internally `Data` type
/// uses `Arc` so data could be created outside of app factory and clones could
/// be stored via `App::app_data()` method.
/// Application data stored with `App::app_data()` method is available through the
/// [`HttpRequest::app_data`](crate::HttpRequest::app_data) method at runtime.
///
/// # [`Data<T>`]
/// Any [`Data<T>`] type added here can utilize it's extractor implementation in handlers.
/// Types not wrapped in `Data<T>` cannot use this extractor. See [its docs](Data<T>) for more
/// about its usage and patterns.
///
/// ```
/// use std::cell::Cell;
/// use actix_web::{web, App, HttpResponse, Responder};
/// use actix_web::{web, App, HttpRequest, HttpResponse, Responder};
///
/// struct MyData {
/// counter: Cell<usize>,
/// count: std::cell::Cell<usize>,
/// }
///
/// async fn index(data: web::Data<MyData>) -> impl Responder {
/// data.counter.set(data.counter.get() + 1);
/// HttpResponse::Ok()
/// async fn handler(req: HttpRequest, counter: web::Data<MyData>) -> impl Responder {
/// // note this cannot use the Data<T> extractor because it was not added with it
/// let incr = *req.app_data::<usize>().unwrap();
/// assert_eq!(incr, 3);
///
/// // update counter using other value from app data
/// counter.count.set(counter.count.get() + incr);
///
/// HttpResponse::Ok().body(counter.count.get().to_string())
/// }
///
/// let app = App::new()
/// .data(MyData{ counter: Cell::new(0) })
/// .service(
/// web::resource("/index.html").route(
/// web::get().to(index)));
/// let app = App::new().service(
/// web::resource("/")
/// .app_data(3usize)
/// .app_data(web::Data::new(MyData { count: Default::default() }))
/// .route(web::get().to(handler))
/// );
/// ```
///
/// # Shared Mutable State
/// [`HttpServer::new`](crate::HttpServer::new) accepts an application factory rather than an
/// application instance; the factory closure is called on each worker thread independently.
/// Therefore, if you want to share a data object between different workers, a shareable object
/// needs to be created first, outside the `HttpServer::new` closure and cloned into it.
/// [`Data<T>`] is an example of such a sharable object.
///
/// ```ignore
/// let counter = web::Data::new(AppStateWithCounter {
/// counter: Mutex::new(0),
/// });
///
/// HttpServer::new(move || {
/// // move counter object into the closure and clone for each worker
///
/// App::new()
/// .app_data(counter.clone())
/// .route("/", web::get().to(handler))
/// })
/// ```
pub fn app_data<U: 'static>(mut self, ext: U) -> Self {
self.extensions.insert(ext);
self
}
/// Add application (root) data after wrapping in `Data<T>`.
///
/// Deprecated in favor of [`app_data`](Self::app_data).
#[deprecated(since = "4.0.0", note = "Use `.app_data(Data::new(val))` instead.")]
pub fn data<U: 'static>(self, data: U) -> Self {
self.app_data(Data::new(data))
@ -138,18 +173,6 @@ where
self
}
/// Set application level arbitrary data item.
///
/// Application data stored with `App::app_data()` method is available
/// via `HttpRequest::app_data()` method at runtime.
///
/// This method could be used for storing `Data<T>` as well, in that case
/// data could be accessed by using `Data<T>` extractor.
pub fn app_data<U: 'static>(mut self, ext: U) -> Self {
self.extensions.insert(ext);
self
}
/// Run external configuration as part of the application building
/// process
///

9
src/app_service.rs
View file

@ -144,7 +144,9 @@ where
}
}
/// Service that takes a [`Request`] and delegates to a service that take a [`ServiceRequest`].
/// The [`Service`] that is passed to `actix-http`'s server builder.
///
/// Wraps a service receiving a [`ServiceRequest`] into one receiving a [`Request`].
pub struct AppInitService<T, B>
where
T: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error>,
@ -275,6 +277,7 @@ impl ServiceFactory<ServiceRequest> for AppRoutingFactory {
}
}
/// The Actix Web router default entry point.
pub struct AppRouting {
router: Router<HttpService, Guards>,
default: HttpService,
@ -299,6 +302,10 @@ impl Service<ServiceRequest> for AppRouting {
true
});
// you might expect to find `req.add_data_container()` called here but `HttpRequest` objects
// are created with the root data already set (in `AppInitService::call`) and root data is
// retained when releasing requests back to the pool
if let Some((srv, _info)) = res {
srv.call(req)
} else {

11
src/config.rs
View file

@ -62,6 +62,8 @@ impl AppService {
(self.config, self.services)
}
/// Clones inner config and default service, returning new `AppService` with empty service list
/// marked as non-root.
pub(crate) fn clone_config(&self) -> Self {
AppService {
config: self.config.clone(),
@ -71,12 +73,12 @@ impl AppService {
}
}
/// Service configuration
/// Returns reference to configuration.
pub fn config(&self) -> &AppConfig {
&self.config
}
/// Default resource
/// Returns default handler factory.
pub fn default_service(&self) -> Rc<HttpNewService> {
self.default.clone()
}
@ -116,7 +118,7 @@ impl AppConfig {
AppConfig { secure, host, addr }
}
/// Needed in actix-test crate.
/// Needed in actix-test crate. Semver exempt.
#[doc(hidden)]
pub fn __priv_test_new(secure: bool, host: String, addr: SocketAddr) -> Self {
AppConfig::new(secure, host, addr)
@ -192,6 +194,7 @@ impl ServiceConfig {
/// Add shared app data item.
///
/// Counterpart to [`App::data()`](crate::App::data).
#[deprecated(since = "4.0.0", note = "Use `.app_data(Data::new(val))` instead.")]
pub fn data<U: 'static>(&mut self, data: U) -> &mut Self {
self.app_data(Data::new(data));
self
@ -257,6 +260,8 @@ mod tests {
use crate::test::{call_service, init_service, read_body, TestRequest};
use crate::{web, App, HttpRequest, HttpResponse};
// allow deprecated `ServiceConfig::data`
#[allow(deprecated)]
#[actix_rt::test]
async fn test_data() {
let cfg = |cfg: &mut ServiceConfig| {

5
src/data.rs
View file

@ -36,6 +36,11 @@ pub(crate) type FnDataFactory =
/// If route data is not set for a handler, using `Data<T>` extractor would cause *Internal
/// Server Error* response.
///
// TODO: document `dyn T` functionality through converting an Arc
// TODO: note equivalence of req.app_data<Data<T>> and Data<T> extractor
// TODO: note that data must be inserted using Data<T> in order to extract it
///
/// # Examples
/// ```
/// use std::sync::Mutex;
/// use actix_web::{web, App, HttpResponse, Responder};

76
src/resource.rs
View file

@ -169,41 +169,38 @@ where
self
}
/// Provide resource specific data. This method allows to add extractor
/// configuration or specific state available via `Data<T>` extractor.
/// Provided data is available for all routes registered for the current resource.
/// Resource data overrides data registered by `App::data()` method.
///
/// ```
/// use actix_web::{web, App, FromRequest};
///
/// /// extract text data from request
/// async fn index(body: String) -> String {
/// format!("Body {}!", body)
/// }
///
/// fn main() {
/// let app = App::new().service(
/// web::resource("/index.html")
/// // limit size of the payload
/// .data(String::configure(|cfg| {
/// cfg.limit(4096)
/// }))
/// .route(
/// web::get()
/// // register handler
/// .to(index)
/// ));
/// }
/// ```
#[deprecated(since = "4.0.0", note = "Use `.app_data(Data::new(val))` instead.")]
pub fn data<U: 'static>(self, data: U) -> Self {
self.app_data(Data::new(data))
}
/// Add resource data.
///
/// Data of different types from parent contexts will still be accessible.
/// Data of different types from parent contexts will still be accessible. Any `Data<T>` types
/// set here can be extracted in handlers using the `Data<T>` extractor.
///
/// # Examples
/// ```
/// use std::cell::Cell;
/// use actix_web::{web, App, HttpRequest, HttpResponse, Responder};
///
/// struct MyData {
/// count: std::cell::Cell<usize>,
/// }
///
/// async fn handler(req: HttpRequest, counter: web::Data<MyData>) -> impl Responder {
/// // note this cannot use the Data<T> extractor because it was not added with it
/// let incr = *req.app_data::<usize>().unwrap();
/// assert_eq!(incr, 3);
///
/// // update counter using other value from app data
/// counter.count.set(counter.count.get() + incr);
///
/// HttpResponse::Ok().body(counter.count.get().to_string())
/// }
///
/// let app = App::new().service(
/// web::resource("/")
/// .app_data(3usize)
/// .app_data(web::Data::new(MyData { count: Default::default() }))
/// .route(web::get().to(handler))
/// );
/// ```
pub fn app_data<U: 'static>(mut self, data: U) -> Self {
self.app_data
.get_or_insert_with(Extensions::new)
@ -212,6 +209,14 @@ where
self
}
/// Add resource data after wrapping in `Data<T>`.
///
/// Deprecated in favor of [`app_data`](Self::app_data).
#[deprecated(since = "4.0.0", note = "Use `.app_data(Data::new(val))` instead.")]
pub fn data<U: 'static>(self, data: U) -> Self {
self.app_data(Data::new(data))
}
/// Register a new route and add handler. This route matches all requests.
///
/// ```
@ -227,7 +232,6 @@ where
/// This is shortcut for:
///
/// ```
/// # extern crate actix_web;
/// # use actix_web::*;
/// # fn index(req: HttpRequest) -> HttpResponse { unimplemented!() }
/// App::new().service(web::resource("/").route(web::route().to(index)));
@ -695,7 +699,7 @@ mod tests {
assert_eq!(resp.status(), StatusCode::NO_CONTENT);
}
// allow deprecated App::data
// allow deprecated `{App, Resource}::data`
#[allow(deprecated)]
#[actix_rt::test]
async fn test_data() {
@ -729,7 +733,7 @@ mod tests {
assert_eq!(resp.status(), StatusCode::OK);
}
// allow deprecated App::data
// allow deprecated `{App, Resource}::data`
#[allow(deprecated)]
#[actix_rt::test]
async fn test_data_default_service() {

128
src/scope.rs
View file

@ -1,28 +1,23 @@
use std::cell::RefCell;
use std::fmt;
use std::future::Future;
use std::rc::Rc;
use std::{cell::RefCell, fmt, future::Future, mem, rc::Rc};
use actix_http::Extensions;
use actix_router::{ResourceDef, Router};
use actix_service::boxed::{self, BoxService, BoxServiceFactory};
use actix_service::{
apply, apply_fn_factory, IntoServiceFactory, Service, ServiceFactory, ServiceFactoryExt,
Transform,
apply, apply_fn_factory,
boxed::{self, BoxService, BoxServiceFactory},
IntoServiceFactory, Service, ServiceFactory, ServiceFactoryExt, Transform,
};
use futures_core::future::LocalBoxFuture;
use futures_util::future::join_all;
use crate::config::ServiceConfig;
use crate::data::Data;
use crate::dev::{AppService, HttpServiceFactory};
use crate::error::Error;
use crate::guard::Guard;
use crate::resource::Resource;
use crate::rmap::ResourceMap;
use crate::route::Route;
use crate::service::{
AppServiceFactory, ServiceFactoryWrapper, ServiceRequest, ServiceResponse,
use crate::{
config::ServiceConfig,
data::Data,
dev::{AppService, HttpServiceFactory},
guard::Guard,
rmap::ResourceMap,
service::{AppServiceFactory, ServiceFactoryWrapper, ServiceRequest, ServiceResponse},
Error, Resource, Route,
};
type Guards = Vec<Box<dyn Guard>>;
@ -71,16 +66,17 @@ pub struct Scope<T = ScopeEndpoint> {
impl Scope {
/// Create a new scope
pub fn new(path: &str) -> Scope {
let fref = Rc::new(RefCell::new(None));
let factory_ref = Rc::new(RefCell::new(None));
Scope {
endpoint: ScopeEndpoint::new(fref.clone()),
endpoint: ScopeEndpoint::new(Rc::clone(&factory_ref)),
rdef: path.to_string(),
app_data: None,
guards: Vec::new(),
services: Vec::new(),
default: None,
external: Vec::new(),
factory_ref: fref,
factory_ref,
}
}
}
@ -120,40 +116,38 @@ where
self
}
/// Set or override application data. Application data could be accessed
/// by using `Data<T>` extractor where `T` is data type.
///
/// ```
/// use std::cell::Cell;
/// use actix_web::{web, App, HttpResponse, Responder};
///
/// struct MyData {
/// counter: Cell<usize>,
/// }
///
/// async fn index(data: web::Data<MyData>) -> impl Responder {
/// data.counter.set(data.counter.get() + 1);
/// HttpResponse::Ok()
/// }
///
/// fn main() {
/// let app = App::new().service(
/// web::scope("/app")
/// .data(MyData{ counter: Cell::new(0) })
/// .service(
/// web::resource("/index.html").route(
/// web::get().to(index)))
/// );
/// }
/// ```
#[deprecated(since = "4.0.0", note = "Use `.app_data(Data::new(val))` instead.")]
pub fn data<U: 'static>(self, data: U) -> Self {
self.app_data(Data::new(data))
}
/// Add scope data.
///
/// Data of different types from parent contexts will still be accessible.
/// Data of different types from parent contexts will still be accessible. Any `Data<T>` types
/// set here can be extracted in handlers using the `Data<T>` extractor.
///
/// # Examples
/// ```
/// use std::cell::Cell;
/// use actix_web::{web, App, HttpRequest, HttpResponse, Responder};
///
/// struct MyData {
/// count: std::cell::Cell<usize>,
/// }
///
/// async fn handler(req: HttpRequest, counter: web::Data<MyData>) -> impl Responder {
/// // note this cannot use the Data<T> extractor because it was not added with it
/// let incr = *req.app_data::<usize>().unwrap();
/// assert_eq!(incr, 3);
///
/// // update counter using other value from app data
/// counter.count.set(counter.count.get() + incr);
///
/// HttpResponse::Ok().body(counter.count.get().to_string())
/// }
///
/// let app = App::new().service(
/// web::scope("/app")
/// .app_data(3usize)
/// .app_data(web::Data::new(MyData { count: Default::default() }))
/// .route("/", web::get().to(handler))
/// );
/// ```
pub fn app_data<U: 'static>(mut self, data: U) -> Self {
self.app_data
.get_or_insert_with(Extensions::new)
@ -162,15 +156,20 @@ where
self
}
/// Run external configuration as part of the scope building
/// process
/// Add scope data after wrapping in `Data<T>`.
///
/// This function is useful for moving parts of configuration to a
/// different module or even library. For example,
/// some of the resource's configuration could be moved to different module.
/// Deprecated in favor of [`app_data`](Self::app_data).
#[deprecated(since = "4.0.0", note = "Use `.app_data(Data::new(val))` instead.")]
pub fn data<U: 'static>(self, data: U) -> Self {
self.app_data(Data::new(data))
}
/// Run external configuration as part of the scope building process.
///
/// This function is useful for moving parts of configuration to a different module or library.
/// For example, some of the resource's configuration could be moved to different module.
///
/// ```
/// # extern crate actix_web;
/// use actix_web::{web, middleware, App, HttpResponse};
///
/// // this function could be located in different module
@ -191,18 +190,21 @@ where
/// .route("/index.html", web::get().to(|| HttpResponse::Ok()));
/// }
/// ```
pub fn configure<F>(mut self, f: F) -> Self
pub fn configure<F>(mut self, cfg_fn: F) -> Self
where
F: FnOnce(&mut ServiceConfig),
{
let mut cfg = ServiceConfig::new();
f(&mut cfg);
cfg_fn(&mut cfg);
self.services.extend(cfg.services);
self.external.extend(cfg.external);
// TODO: add Extensions::is_empty check and conditionally insert data
self.app_data
.get_or_insert_with(Extensions::new)
.extend(cfg.app_data);
self
}
@ -419,7 +421,7 @@ where
let mut rmap = ResourceMap::new(ResourceDef::root_prefix(&self.rdef));
// external resources
for mut rdef in std::mem::take(&mut self.external) {
for mut rdef in mem::take(&mut self.external) {
rmap.add(&mut rdef, None);
}
@ -991,7 +993,7 @@ mod tests {
);
}
// allow deprecated App::data
// allow deprecated {App, Scope}::data
#[allow(deprecated)]
#[actix_rt::test]
async fn test_override_data() {
@ -1011,7 +1013,7 @@ mod tests {
assert_eq!(resp.status(), StatusCode::OK);
}
// allow deprecated App::data
// allow deprecated `{App, Scope}::data`
#[allow(deprecated)]
#[actix_rt::test]
async fn test_override_data_default_service() {

3
src/service.rs
View file

@ -17,9 +17,8 @@ use crate::{
dev::insert_slash,
guard::Guard,
info::ConnectionInfo,
request::HttpRequest,
rmap::ResourceMap,
Error, HttpResponse,
Error, HttpRequest, HttpResponse,
};
pub trait HttpServiceFactory {

1
src/web.rs
View file

@ -43,7 +43,6 @@ pub use crate::types::*;
/// the exposed `Params` object:
///
/// ```
/// # extern crate actix_web;
/// use actix_web::{web, App, HttpResponse};
///
/// let app = App::new().service(