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# 0.7.15
- The `' '` character is not percent decoded anymore before matching routes. If you need to use it in
your routes, you should use `%20`.
instead of
```rust
fn main() {
let app = App::new().resource("/my index", |r| {
r.method(http::Method::GET)
.with(index);
});
}
```
use
```rust
fn main() {
let app = App::new().resource("/my%20index", |r| {
r.method(http::Method::GET)
.with(index);
});
}
```
- If you used `AsyncResult::async` you need to replace it with `AsyncResult::future`
# 0.7.4
- `Route::with_config()`/`Route::with_async_config()` always passes configuration objects as tuple
even for handler with one parameter.
# 0.7
- `HttpRequest` does not implement `Stream` anymore. If you need to read request payload
use `HttpMessage::payload()` method.
instead of
```rust
fn index(req: HttpRequest) -> impl Responder {
req
.from_err()
.fold(...)
....
}
```
use `.payload()`
```rust
fn index(req: HttpRequest) -> impl Responder {
req
.payload() // <- get request payload stream
.from_err()
.fold(...)
....
}
```
- [Middleware](https://actix.rs/actix-web/actix_web/middleware/trait.Middleware.html)
trait uses `&HttpRequest` instead of `&mut HttpRequest`.
- Removed `Route::with2()` and `Route::with3()` use tuple of extractors instead.
instead of
```rust
fn index(query: Query<..>, info: Json<MyStruct) -> impl Responder {}
```
use tuple of extractors and use `.with()` for registration:
```rust
fn index((query, json): (Query<..>, Json<MyStruct)) -> impl Responder {}
```
- `Handler::handle()` uses `&self` instead of `&mut self`
- `Handler::handle()` accepts reference to `HttpRequest<_>` instead of value
- Removed deprecated `HttpServer::threads()`, use
[HttpServer::workers()](https://actix.rs/actix-web/actix_web/server/struct.HttpServer.html#method.workers) instead.
- Renamed `client::ClientConnectorError::Connector` to
`client::ClientConnectorError::Resolver`
- `Route::with()` does not return `ExtractorConfig`, to configure
extractor use `Route::with_config()`
instead of
```rust
fn main() {
let app = App::new().resource("/index.html", |r| {
r.method(http::Method::GET)
.with(index)
.limit(4096); // <- limit size of the payload
});
}
```
use
```rust
fn main() {
let app = App::new().resource("/index.html", |r| {
r.method(http::Method::GET)
.with_config(index, |cfg| { // <- register handler
cfg.limit(4096); // <- limit size of the payload
})
});
}
```
- `Route::with_async()` does not return `ExtractorConfig`, to configure
extractor use `Route::with_async_config()`
# 0.6
- `Path<T>` extractor return `ErrorNotFound` on failure instead of `ErrorBadRequest`
- `ws::Message::Close` now includes optional close reason.
`ws::CloseCode::Status` and `ws::CloseCode::Empty` have been removed.
- `HttpServer::threads()` renamed to `HttpServer::workers()`.
- `HttpServer::start_ssl()` and `HttpServer::start_tls()` deprecated.
Use `HttpServer::bind_ssl()` and `HttpServer::bind_tls()` instead.
- `HttpRequest::extensions()` returns read only reference to the request's Extension
`HttpRequest::extensions_mut()` returns mutable reference.
- Instead of
`use actix_web::middleware::{ CookieSessionBackend, CookieSessionError, RequestSession, Session, SessionBackend, SessionImpl, SessionStorage};`
use `actix_web::middleware::session`
`use actix_web::middleware::session{CookieSessionBackend, CookieSessionError, RequestSession, Session, SessionBackend, SessionImpl, SessionStorage};`
- `FromRequest::from_request()` accepts mutable reference to a request
- `FromRequest::Result` has to implement `Into<Reply<Self>>`
- [`Responder::respond_to()`](https://actix.rs/actix-web/actix_web/trait.Responder.html#tymethod.respond_to)
is generic over `S`
- Use `Query` extractor instead of HttpRequest::query()`.
```rust
fn index(q: Query<HashMap<String, String>>) -> Result<..> {
...
}
```
or
```rust
let q = Query::<HashMap<String, String>>::extract(req);
```
- Websocket operations are implemented as `WsWriter` trait.
you need to use `use actix_web::ws::WsWriter`
# 0.5
- `HttpResponseBuilder::body()`, `.finish()`, `.json()`
methods return `HttpResponse` instead of `Result<HttpResponse>`
- `actix_web::Method`, `actix_web::StatusCode`, `actix_web::Version`
moved to `actix_web::http` module
- `actix_web::header` moved to `actix_web::http::header`
- `NormalizePath` moved to `actix_web::http` module
- `HttpServer` moved to `actix_web::server`, added new `actix_web::server::new()` function,
shortcut for `actix_web::server::HttpServer::new()`
- `DefaultHeaders` middleware does not use separate builder, all builder methods moved to type itself
- `StaticFiles::new()`'s show_index parameter removed, use `show_files_listing()` method instead.
- `CookieSessionBackendBuilder` removed, all methods moved to `CookieSessionBackend` type
- `actix_web::httpcodes` module is deprecated, `HttpResponse::Ok()`, `HttpResponse::Found()` and other `HttpResponse::XXX()`
functions should be used instead
- `ClientRequestBuilder::body()` returns `Result<_, actix_web::Error>`
instead of `Result<_, http::Error>`
- `Application` renamed to a `App`
- `actix_web::Reply`, `actix_web::Resource` moved to `actix_web::dev`

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## 1.0.1
- Cors middleware has been moved to `actix-cors` crate
instead of
```rust
use actix_web::middleware::cors::Cors;
```
use
```rust
use actix_cors::Cors;
```
- Identity middleware has been moved to `actix-identity` crate
instead of
```rust
use actix_web::middleware::identity::{Identity, CookieIdentityPolicy, IdentityService};
```
use
```rust
use actix_identity::{Identity, CookieIdentityPolicy, IdentityService};
```
## 1.0.0
- Extractor configuration. In version 1.0 this is handled with the new `Data` mechanism for both setting and retrieving the configuration
instead of
```rust
#[derive(Default)]
struct ExtractorConfig {
config: String,
}
impl FromRequest for YourExtractor {
type Config = ExtractorConfig;
type Result = Result<YourExtractor, Error>;
fn from_request(req: &HttpRequest, cfg: &Self::Config) -> Self::Result {
println!("use the config: {:?}", cfg.config);
...
}
}
App::new().resource("/route_with_config", |r| {
r.post().with_config(handler_fn, |cfg| {
cfg.0.config = "test".to_string();
})
})
```
use the HttpRequest to get the configuration like any other `Data` with `req.app_data::<C>()` and set it with the `data()` method on the `resource`
```rust
#[derive(Default)]
struct ExtractorConfig {
config: String,
}
impl FromRequest for YourExtractor {
type Error = Error;
type Future = Result<Self, Self::Error>;
type Config = ExtractorConfig;
fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future {
let cfg = req.app_data::<ExtractorConfig>();
println!("config data?: {:?}", cfg.unwrap().role);
...
}
}
App::new().service(
resource("/route_with_config")
.data(ExtractorConfig {
config: "test".to_string(),
})
.route(post().to(handler_fn)),
)
```
- Resource registration. 1.0 version uses generalized resource
registration via `.service()` method.
instead of
```rust
App.new().resource("/welcome", |r| r.f(welcome))
```
use App's or Scope's `.service()` method. `.service()` method accepts
object that implements `HttpServiceFactory` trait. By default
actix-web provides `Resource` and `Scope` services.
```rust
App.new().service(
web::resource("/welcome")
.route(web::get().to(welcome))
.route(web::post().to(post_handler))
```
- Scope registration.
instead of
```rust
let app = App::new().scope("/{project_id}", |scope| {
scope
.resource("/path1", |r| r.f(|_| HttpResponse::Ok()))
.resource("/path2", |r| r.f(|_| HttpResponse::Ok()))
.resource("/path3", |r| r.f(|_| HttpResponse::MethodNotAllowed()))
});
```
use `.service()` for registration and `web::scope()` as scope object factory.
```rust
let app = App::new().service(
web::scope("/{project_id}")
.service(web::resource("/path1").to(|| HttpResponse::Ok()))
.service(web::resource("/path2").to(|| HttpResponse::Ok()))
.service(web::resource("/path3").to(|| HttpResponse::MethodNotAllowed()))
);
```
- `.with()`, `.with_async()` registration methods have been renamed to `.to()` and `.to_async()`.
instead of
```rust
App.new().resource("/welcome", |r| r.with(welcome))
```
use `.to()` or `.to_async()` methods
```rust
App.new().service(web::resource("/welcome").to(welcome))
```
- Passing arguments to handler with extractors, multiple arguments are allowed
instead of
```rust
fn welcome((body, req): (Bytes, HttpRequest)) -> ... {
...
}
```
use multiple arguments
```rust
fn welcome(body: Bytes, req: HttpRequest) -> ... {
...
}
```
- `.f()`, `.a()` and `.h()` handler registration methods have been removed.
Use `.to()` for handlers and `.to_async()` for async handlers. Handler function
must use extractors.
instead of
```rust
App.new().resource("/welcome", |r| r.f(welcome))
```
use App's `to()` or `to_async()` methods
```rust
App.new().service(web::resource("/welcome").to(welcome))
```
- `HttpRequest` does not provide access to request's payload stream.
instead of
```rust
fn index(req: &HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
req
.payload()
.from_err()
.fold((), |_, chunk| {
...
})
.map(|_| HttpResponse::Ok().finish())
.responder()
}
```
use `Payload` extractor
```rust
fn index(stream: web::Payload) -> impl Future<Item=HttpResponse, Error=Error> {
stream
.from_err()
.fold((), |_, chunk| {
...
})
.map(|_| HttpResponse::Ok().finish())
}
```
- `State` is now `Data`. You register Data during the App initialization process
and then access it from handlers either using a Data extractor or using
HttpRequest's api.
instead of
```rust
App.with_state(T)
```
use App's `data` method
```rust
App.new()
.data(T)
```
and either use the Data extractor within your handler
```rust
use actix_web::web::Data;
fn endpoint_handler(Data<T>)){
...
}
```
.. or access your Data element from the HttpRequest
```rust
fn endpoint_handler(req: HttpRequest) {
let data: Option<Data<T>> = req.app_data::<T>();
}
```
- AsyncResponder is removed, use `.to_async()` registration method and `impl Future<>` as result type.
instead of
```rust
use actix_web::AsyncResponder;
fn endpoint_handler(...) -> impl Future<Item=HttpResponse, Error=Error>{
...
.responder()
}
```
.. simply omit AsyncResponder and the corresponding responder() finish method
- Middleware
instead of
```rust
let app = App::new()
.middleware(middleware::Logger::default())
```
use `.wrap()` method
```rust
let app = App::new()
.wrap(middleware::Logger::default())
.route("/index.html", web::get().to(index));
```
- `HttpRequest::body()`, `HttpRequest::urlencoded()`, `HttpRequest::json()`, `HttpRequest::multipart()`
method have been removed. Use `Bytes`, `String`, `Form`, `Json`, `Multipart` extractors instead.
instead of
```rust
fn index(req: &HttpRequest) -> Responder {
req.body()
.and_then(|body| {
...
})
}
```
use
```rust
fn index(body: Bytes) -> Responder {
...
}
```
- `actix_web::server` module has been removed. To start http server use `actix_web::HttpServer` type
- StaticFiles and NamedFile have been moved to a separate crate.
instead of `use actix_web::fs::StaticFile`
use `use actix_files::Files`
instead of `use actix_web::fs::Namedfile`
use `use actix_files::NamedFile`
- Multipart has been moved to a separate crate.
instead of `use actix_web::multipart::Multipart`
use `use actix_multipart::Multipart`
- Response compression is not enabled by default.
To enable, use `Compress` middleware, `App::new().wrap(Compress::default())`.
- Session middleware moved to actix-session crate
- Actors support have been moved to `actix-web-actors` crate
- Custom Error
Instead of error_response method alone, ResponseError now provides two methods: error_response and render_response respectively. Where, error_response creates the error response and render_response returns the error response to the caller.
Simplest migration from 0.7 to 1.0 shall include below method to the custom implementation of ResponseError:
```rust
fn render_response(&self) -> HttpResponse {
self.error_response()
}
```

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# Migrating to 2.0.0
- `HttpServer::start()` renamed to `HttpServer::run()`. It also possible to
`.await` on `run` method result, in that case it awaits server exit.
- `App::register_data()` renamed to `App::app_data()` and accepts any type `T: 'static`.
Stored data is available via `HttpRequest::app_data()` method at runtime.
- Extractor configuration must be registered with `App::app_data()` instead of `App::data()`
- Sync handlers has been removed. `.to_async()` method has been renamed to `.to()`
replace `fn` with `async fn` to convert sync handler to async
- `actix_http_test::TestServer` moved to `actix_web::test` module. To start
test server use `test::start()` or `test_start_with_config()` methods
- `ResponseError` trait has been reafctored. `ResponseError::error_response()` renders
http response.
- Feature `rust-tls` renamed to `rustls`
instead of
```rust
actix-web = { version = "2.0.0", features = ["rust-tls"] }
```
use
```rust
actix-web = { version = "2.0.0", features = ["rustls"] }
```
- Feature `ssl` renamed to `openssl`
instead of
```rust
actix-web = { version = "2.0.0", features = ["ssl"] }
```
use
```rust
actix-web = { version = "2.0.0", features = ["openssl"] }
```
- `Cors` builder now requires that you call `.finish()` to construct the middleware

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# Migrating to 3.0.0
- The return type for `ServiceRequest::app_data::<T>()` was changed from returning a `Data<T>` to
simply a `T`. To access a `Data<T>` use `ServiceRequest::app_data::<Data<T>>()`.
- Cookie handling has been offloaded to the `cookie` crate:
- `USERINFO_ENCODE_SET` is no longer exposed. Percent-encoding is still supported; check docs.
- Some types now require lifetime parameters.
- The time crate was updated to `v0.2`, a major breaking change to the time crate, which affects
any `actix-web` method previously expecting a time v0.1 input.
- Setting a cookie's SameSite property, explicitly, to `SameSite::None` will now
result in `SameSite=None` being sent with the response Set-Cookie header.
To create a cookie without a SameSite attribute, remove any calls setting same_site.
- actix-http support for Actors messages was moved to actix-http crate and is enabled
with feature `actors`
- content_length function is removed from actix-http.
You can set Content-Length by normally setting the response body or calling no_chunking function.
- `BodySize::Sized64` variant has been removed. `BodySize::Sized` now receives a
`u64` instead of a `usize`.
- Code that was using `path.<index>` to access a `web::Path<(A, B, C)>`s elements now needs to use
destructuring or `.into_inner()`. For example:
```rust
// Previously:
async fn some_route(path: web::Path<(String, String)>) -> String {
format!("Hello, {} {}", path.0, path.1)
}
// Now (this also worked before):
async fn some_route(path: web::Path<(String, String)>) -> String {
let (first_name, last_name) = path.into_inner();
format!("Hello, {} {}", first_name, last_name)
}
// Or (this wasn't previously supported):
async fn some_route(web::Path((first_name, last_name)): web::Path<(String, String)>) -> String {
format!("Hello, {} {}", first_name, last_name)
}
```
- `middleware::NormalizePath` can now also be configured to trim trailing slashes instead of always keeping one.
It will need `middleware::normalize::TrailingSlash` when being constructed with `NormalizePath::new(...)`,
or for an easier migration you can replace `wrap(middleware::NormalizePath)` with `wrap(middleware::NormalizePath::new(TrailingSlash::MergeOnly))`.
- `HttpServer::maxconn` is renamed to the more expressive `HttpServer::max_connections`.
- `HttpServer::maxconnrate` is renamed to the more expressive `HttpServer::max_connection_rate`.

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# Migrating to 4.0.0
> It is assumed that migration is happening _from_ v3.x. If migration from older version of Actix Web, see [the historical migration notes](./MIGRATION-3.0.md).
## Rustls Upgrade
Required version of Rustls dependency was bumped to the latest version 0.20. As a result, the new server config builder has changed. [See the updated example project &rarr;.](https://github.com/actix/examples/tree/HEAD/security/rustls/)
### `NormalizePath` middleware
The default `NormalizePath` behavior now strips trailing slashes by default. This was previously documented to be the case in v3 but the behavior now matches. The effect is that routes defined with trailing slashes will become inaccessible when using `NormalizePath::default()`. As such, calling `NormalizePath::default()` will log a warning. It is advised that the `new` or `trim` methods be used instead.
#### Migration Diff
```diff
- #[get("/test/")]`
+ #[get("/test")]`
- .wrap(NormalizePath::default())`
+ .wrap(NormalizePath::trim())`
```
Alternatively, explicitly require trailing slashes: `NormalizePath::new(TrailingSlash::Always)`.
### `FromRequest` trait
The associated type `Config` of `FromRequest` was removed.
### Compression Feature Flags
Feature flag `compress` has been split into its supported algorithm (brotli, gzip, zstd). By default, all compression algorithms are enabled. The new flags are:
- `compress-brotli`
- `compress-gzip`
- `compress-zstd`
If you have set in your `Cargo.toml` dedicated `actix-web` features and you still want to have compression enabled.

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## Unreleased
- The default `NormalizePath` behavior now strips trailing slashes by default. This was
previously documented to be the case in v3 but the behavior now matches. The effect is that
routes defined with trailing slashes will become inaccessible when
using `NormalizePath::default()`. As such, calling `NormalizePath::default()` will log a warning.
It is advised that the `new` method be used instead.
Before: `#[get("/test/")]`
After: `#[get("/test")]`
Alternatively, explicitly require trailing slashes: `NormalizePath::new(TrailingSlash::Always)`.
- The `type Config` of `FromRequest` was removed.
- Feature flag `compress` has been split into its supported algorithm (brotli, gzip, zstd).
By default all compression algorithms are enabled.
To select algorithm you want to include with `middleware::Compress` use following flags:
- `compress-brotli`
- `compress-gzip`
- `compress-zstd`
If you have set in your `Cargo.toml` dedicated `actix-web` features and you still want
to have compression enabled. Please change features selection like bellow:
Before: `"compress"`
After: `"compress-brotli", "compress-gzip", "compress-zstd"`
## 3.0.0
- The return type for `ServiceRequest::app_data::<T>()` was changed from returning a `Data<T>` to
simply a `T`. To access a `Data<T>` use `ServiceRequest::app_data::<Data<T>>()`.
- Cookie handling has been offloaded to the `cookie` crate:
* `USERINFO_ENCODE_SET` is no longer exposed. Percent-encoding is still supported; check docs.
* Some types now require lifetime parameters.
- The time crate was updated to `v0.2`, a major breaking change to the time crate, which affects
any `actix-web` method previously expecting a time v0.1 input.
- Setting a cookie's SameSite property, explicitly, to `SameSite::None` will now
result in `SameSite=None` being sent with the response Set-Cookie header.
To create a cookie without a SameSite attribute, remove any calls setting same_site.
- actix-http support for Actors messages was moved to actix-http crate and is enabled
with feature `actors`
- content_length function is removed from actix-http.
You can set Content-Length by normally setting the response body or calling no_chunking function.
- `BodySize::Sized64` variant has been removed. `BodySize::Sized` now receives a
`u64` instead of a `usize`.
- Code that was using `path.<index>` to access a `web::Path<(A, B, C)>`s elements now needs to use
destructuring or `.into_inner()`. For example:
```rust
// Previously:
async fn some_route(path: web::Path<(String, String)>) -> String {
format!("Hello, {} {}", path.0, path.1)
}
// Now (this also worked before):
async fn some_route(path: web::Path<(String, String)>) -> String {
let (first_name, last_name) = path.into_inner();
format!("Hello, {} {}", first_name, last_name)
}
// Or (this wasn't previously supported):
async fn some_route(web::Path((first_name, last_name)): web::Path<(String, String)>) -> String {
format!("Hello, {} {}", first_name, last_name)
}
```
- `middleware::NormalizePath` can now also be configured to trim trailing slashes instead of always keeping one.
It will need `middleware::normalize::TrailingSlash` when being constructed with `NormalizePath::new(...)`,
or for an easier migration you can replace `wrap(middleware::NormalizePath)` with `wrap(middleware::NormalizePath::new(TrailingSlash::MergeOnly))`.
- `HttpServer::maxconn` is renamed to the more expressive `HttpServer::max_connections`.
- `HttpServer::maxconnrate` is renamed to the more expressive `HttpServer::max_connection_rate`.
## 2.0.0
- `HttpServer::start()` renamed to `HttpServer::run()`. It also possible to
`.await` on `run` method result, in that case it awaits server exit.
- `App::register_data()` renamed to `App::app_data()` and accepts any type `T: 'static`.
Stored data is available via `HttpRequest::app_data()` method at runtime.
- Extractor configuration must be registered with `App::app_data()` instead of `App::data()`
- Sync handlers has been removed. `.to_async()` method has been renamed to `.to()`
replace `fn` with `async fn` to convert sync handler to async
- `actix_http_test::TestServer` moved to `actix_web::test` module. To start
test server use `test::start()` or `test_start_with_config()` methods
- `ResponseError` trait has been reafctored. `ResponseError::error_response()` renders
http response.
- Feature `rust-tls` renamed to `rustls`
instead of
```rust
actix-web = { version = "2.0.0", features = ["rust-tls"] }
```
use
```rust
actix-web = { version = "2.0.0", features = ["rustls"] }
```
- Feature `ssl` renamed to `openssl`
instead of
```rust
actix-web = { version = "2.0.0", features = ["ssl"] }
```
use
```rust
actix-web = { version = "2.0.0", features = ["openssl"] }
```
- `Cors` builder now requires that you call `.finish()` to construct the middleware
## 1.0.1
- Cors middleware has been moved to `actix-cors` crate
instead of
```rust
use actix_web::middleware::cors::Cors;
```
use
```rust
use actix_cors::Cors;
```
- Identity middleware has been moved to `actix-identity` crate
instead of
```rust
use actix_web::middleware::identity::{Identity, CookieIdentityPolicy, IdentityService};
```
use
```rust
use actix_identity::{Identity, CookieIdentityPolicy, IdentityService};
```
## 1.0.0
- Extractor configuration. In version 1.0 this is handled with the new `Data` mechanism for both setting and retrieving the configuration
instead of
```rust
#[derive(Default)]
struct ExtractorConfig {
config: String,
}
impl FromRequest for YourExtractor {
type Config = ExtractorConfig;
type Result = Result<YourExtractor, Error>;
fn from_request(req: &HttpRequest, cfg: &Self::Config) -> Self::Result {
println!("use the config: {:?}", cfg.config);
...
}
}
App::new().resource("/route_with_config", |r| {
r.post().with_config(handler_fn, |cfg| {
cfg.0.config = "test".to_string();
})
})
```
use the HttpRequest to get the configuration like any other `Data` with `req.app_data::<C>()` and set it with the `data()` method on the `resource`
```rust
#[derive(Default)]
struct ExtractorConfig {
config: String,
}
impl FromRequest for YourExtractor {
type Error = Error;
type Future = Result<Self, Self::Error>;
type Config = ExtractorConfig;
fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future {
let cfg = req.app_data::<ExtractorConfig>();
println!("config data?: {:?}", cfg.unwrap().role);
...
}
}
App::new().service(
resource("/route_with_config")
.data(ExtractorConfig {
config: "test".to_string(),
})
.route(post().to(handler_fn)),
)
```
- Resource registration. 1.0 version uses generalized resource
registration via `.service()` method.
instead of
```rust
App.new().resource("/welcome", |r| r.f(welcome))
```
use App's or Scope's `.service()` method. `.service()` method accepts
object that implements `HttpServiceFactory` trait. By default
actix-web provides `Resource` and `Scope` services.
```rust
App.new().service(
web::resource("/welcome")
.route(web::get().to(welcome))
.route(web::post().to(post_handler))
```
- Scope registration.
instead of
```rust
let app = App::new().scope("/{project_id}", |scope| {
scope
.resource("/path1", |r| r.f(|_| HttpResponse::Ok()))
.resource("/path2", |r| r.f(|_| HttpResponse::Ok()))
.resource("/path3", |r| r.f(|_| HttpResponse::MethodNotAllowed()))
});
```
use `.service()` for registration and `web::scope()` as scope object factory.
```rust
let app = App::new().service(
web::scope("/{project_id}")
.service(web::resource("/path1").to(|| HttpResponse::Ok()))
.service(web::resource("/path2").to(|| HttpResponse::Ok()))
.service(web::resource("/path3").to(|| HttpResponse::MethodNotAllowed()))
);
```
- `.with()`, `.with_async()` registration methods have been renamed to `.to()` and `.to_async()`.
instead of
```rust
App.new().resource("/welcome", |r| r.with(welcome))
```
use `.to()` or `.to_async()` methods
```rust
App.new().service(web::resource("/welcome").to(welcome))
```
- Passing arguments to handler with extractors, multiple arguments are allowed
instead of
```rust
fn welcome((body, req): (Bytes, HttpRequest)) -> ... {
...
}
```
use multiple arguments
```rust
fn welcome(body: Bytes, req: HttpRequest) -> ... {
...
}
```
- `.f()`, `.a()` and `.h()` handler registration methods have been removed.
Use `.to()` for handlers and `.to_async()` for async handlers. Handler function
must use extractors.
instead of
```rust
App.new().resource("/welcome", |r| r.f(welcome))
```
use App's `to()` or `to_async()` methods
```rust
App.new().service(web::resource("/welcome").to(welcome))
```
- `HttpRequest` does not provide access to request's payload stream.
instead of
```rust
fn index(req: &HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
req
.payload()
.from_err()
.fold((), |_, chunk| {
...
})
.map(|_| HttpResponse::Ok().finish())
.responder()
}
```
use `Payload` extractor
```rust
fn index(stream: web::Payload) -> impl Future<Item=HttpResponse, Error=Error> {
stream
.from_err()
.fold((), |_, chunk| {
...
})
.map(|_| HttpResponse::Ok().finish())
}
```
- `State` is now `Data`. You register Data during the App initialization process
and then access it from handlers either using a Data extractor or using
HttpRequest's api.
instead of
```rust
App.with_state(T)
```
use App's `data` method
```rust
App.new()
.data(T)
```
and either use the Data extractor within your handler
```rust
use actix_web::web::Data;
fn endpoint_handler(Data<T>)){
...
}
```
.. or access your Data element from the HttpRequest
```rust
fn endpoint_handler(req: HttpRequest) {
let data: Option<Data<T>> = req.app_data::<T>();
}
```
- AsyncResponder is removed, use `.to_async()` registration method and `impl Future<>` as result type.
instead of
```rust
use actix_web::AsyncResponder;
fn endpoint_handler(...) -> impl Future<Item=HttpResponse, Error=Error>{
...
.responder()
}
```
.. simply omit AsyncResponder and the corresponding responder() finish method
- Middleware
instead of
```rust
let app = App::new()
.middleware(middleware::Logger::default())
```
use `.wrap()` method
```rust
let app = App::new()
.wrap(middleware::Logger::default())
.route("/index.html", web::get().to(index));
```
- `HttpRequest::body()`, `HttpRequest::urlencoded()`, `HttpRequest::json()`, `HttpRequest::multipart()`
method have been removed. Use `Bytes`, `String`, `Form`, `Json`, `Multipart` extractors instead.
instead of
```rust
fn index(req: &HttpRequest) -> Responder {
req.body()
.and_then(|body| {
...
})
}
```
use
```rust
fn index(body: Bytes) -> Responder {
...
}
```
- `actix_web::server` module has been removed. To start http server use `actix_web::HttpServer` type
- StaticFiles and NamedFile have been moved to a separate crate.
instead of `use actix_web::fs::StaticFile`
use `use actix_files::Files`
instead of `use actix_web::fs::Namedfile`
use `use actix_files::NamedFile`
- Multipart has been moved to a separate crate.
instead of `use actix_web::multipart::Multipart`
use `use actix_multipart::Multipart`
- Response compression is not enabled by default.
To enable, use `Compress` middleware, `App::new().wrap(Compress::default())`.
- Session middleware moved to actix-session crate
- Actors support have been moved to `actix-web-actors` crate
- Custom Error
Instead of error_response method alone, ResponseError now provides two methods: error_response and render_response respectively. Where, error_response creates the error response and render_response returns the error response to the caller.
Simplest migration from 0.7 to 1.0 shall include below method to the custom implementation of ResponseError:
```rust
fn render_response(&self) -> HttpResponse {
self.error_response()
}
```
## 0.7.15
- The `' '` character is not percent decoded anymore before matching routes. If you need to use it in
your routes, you should use `%20`.
instead of
```rust
fn main() {
let app = App::new().resource("/my index", |r| {
r.method(http::Method::GET)
.with(index);
});
}
```
use
```rust
fn main() {
let app = App::new().resource("/my%20index", |r| {
r.method(http::Method::GET)
.with(index);
});
}
```
- If you used `AsyncResult::async` you need to replace it with `AsyncResult::future`
## 0.7.4
- `Route::with_config()`/`Route::with_async_config()` always passes configuration objects as tuple
even for handler with one parameter.
## 0.7
- `HttpRequest` does not implement `Stream` anymore. If you need to read request payload
use `HttpMessage::payload()` method.
instead of
```rust
fn index(req: HttpRequest) -> impl Responder {
req
.from_err()
.fold(...)
....
}
```
use `.payload()`
```rust
fn index(req: HttpRequest) -> impl Responder {
req
.payload() // <- get request payload stream
.from_err()
.fold(...)
....
}
```
- [Middleware](https://actix.rs/actix-web/actix_web/middleware/trait.Middleware.html)
trait uses `&HttpRequest` instead of `&mut HttpRequest`.
- Removed `Route::with2()` and `Route::with3()` use tuple of extractors instead.
instead of
```rust
fn index(query: Query<..>, info: Json<MyStruct) -> impl Responder {}
```
use tuple of extractors and use `.with()` for registration:
```rust
fn index((query, json): (Query<..>, Json<MyStruct)) -> impl Responder {}
```
- `Handler::handle()` uses `&self` instead of `&mut self`
- `Handler::handle()` accepts reference to `HttpRequest<_>` instead of value
- Removed deprecated `HttpServer::threads()`, use
[HttpServer::workers()](https://actix.rs/actix-web/actix_web/server/struct.HttpServer.html#method.workers) instead.
- Renamed `client::ClientConnectorError::Connector` to
`client::ClientConnectorError::Resolver`
- `Route::with()` does not return `ExtractorConfig`, to configure
extractor use `Route::with_config()`
instead of
```rust
fn main() {
let app = App::new().resource("/index.html", |r| {
r.method(http::Method::GET)
.with(index)
.limit(4096); // <- limit size of the payload
});
}
```
use
```rust
fn main() {
let app = App::new().resource("/index.html", |r| {
r.method(http::Method::GET)
.with_config(index, |cfg| { // <- register handler
cfg.limit(4096); // <- limit size of the payload
})
});
}
```
- `Route::with_async()` does not return `ExtractorConfig`, to configure
extractor use `Route::with_async_config()`
## 0.6
- `Path<T>` extractor return `ErrorNotFound` on failure instead of `ErrorBadRequest`
- `ws::Message::Close` now includes optional close reason.
`ws::CloseCode::Status` and `ws::CloseCode::Empty` have been removed.
- `HttpServer::threads()` renamed to `HttpServer::workers()`.
- `HttpServer::start_ssl()` and `HttpServer::start_tls()` deprecated.
Use `HttpServer::bind_ssl()` and `HttpServer::bind_tls()` instead.
- `HttpRequest::extensions()` returns read only reference to the request's Extension
`HttpRequest::extensions_mut()` returns mutable reference.
- Instead of
`use actix_web::middleware::{
CookieSessionBackend, CookieSessionError, RequestSession,
Session, SessionBackend, SessionImpl, SessionStorage};`
use `actix_web::middleware::session`
`use actix_web::middleware::session{CookieSessionBackend, CookieSessionError,
RequestSession, Session, SessionBackend, SessionImpl, SessionStorage};`
- `FromRequest::from_request()` accepts mutable reference to a request
- `FromRequest::Result` has to implement `Into<Reply<Self>>`
- [`Responder::respond_to()`](
https://actix.rs/actix-web/actix_web/trait.Responder.html#tymethod.respond_to)
is generic over `S`
- Use `Query` extractor instead of HttpRequest::query()`.
```rust
fn index(q: Query<HashMap<String, String>>) -> Result<..> {
...
}
```
or
```rust
let q = Query::<HashMap<String, String>>::extract(req);
```
- Websocket operations are implemented as `WsWriter` trait.
you need to use `use actix_web::ws::WsWriter`
## 0.5
- `HttpResponseBuilder::body()`, `.finish()`, `.json()`
methods return `HttpResponse` instead of `Result<HttpResponse>`
- `actix_web::Method`, `actix_web::StatusCode`, `actix_web::Version`
moved to `actix_web::http` module
- `actix_web::header` moved to `actix_web::http::header`
- `NormalizePath` moved to `actix_web::http` module
- `HttpServer` moved to `actix_web::server`, added new `actix_web::server::new()` function,
shortcut for `actix_web::server::HttpServer::new()`
- `DefaultHeaders` middleware does not use separate builder, all builder methods moved to type itself
- `StaticFiles::new()`'s show_index parameter removed, use `show_files_listing()` method instead.
- `CookieSessionBackendBuilder` removed, all methods moved to `CookieSessionBackend` type
- `actix_web::httpcodes` module is deprecated, `HttpResponse::Ok()`, `HttpResponse::Found()` and other `HttpResponse::XXX()`
functions should be used instead
- `ClientRequestBuilder::body()` returns `Result<_, actix_web::Error>`
instead of `Result<_, http::Error>`
- `Application` renamed to a `App`
- `actix_web::Reply`, `actix_web::Resource` moved to `actix_web::dev`