Struct rocket::local::asynchronous::Client

pub struct Client { /* fields omitted */ }

An async client to construct and dispatch local requests.

For details, see the top-level documentation. For the blocking version, see blocking::Client.

Multithreaded Tracking Synchronization Pitfalls

Unlike its blocking variant, this async Client implements Sync. However, using it in a multithreaded environment while tracking cookies can result in surprising, non-deterministic behavior. This is because while cookie modifications are serialized, the ordering depends on the ordering of request dispatch.

If possible, refrain from sharing a single instance of a tracking Client across multiple threads. Instead, prefer to create a unique instance of Client per thread. If this is not possible, ensure that you are not depending on the ordering of cookie modifications or have arranged for request dispatch to occur in a deterministic manner.

Alternatively, use an untracked client, which does not suffer from these pitfalls.

Example

The following snippet creates a Client from a Rocket instance and dispatches a local POST / request with a body of Hello, world!.

use rocket::local::asynchronous::Client;

let rocket = rocket::build();
let client = Client::tracked(rocket).await.expect("valid rocket");
let response = client.post("/")
    .body("Hello, world!")
    .dispatch()
    .await;

Implementations

impl Client

pub async fn tracked<P: Phase>(rocket: Rocket<P>) -> Result<Self, Error>

Construct a new Client from an instance of Rocket with cookie tracking. This is typically the desired mode of operation for testing.

Cookie Tracking

With cookie tracking enabled, a Client propagates cookie changes made by responses to previously dispatched requests. In other words, succeeding requests reflect changes (additions and removals) made by any prior responses.

Cookie tracking requires synchronization between dispatches. As such, cookie tracking should not be enabled if a local client is being used to serve requests on multiple threads.

Errors

If launching the Rocket instance would fail, excepting network errors, the Error is returned.

use rocket::local::asynchronous::Client;

let rocket = rocket::build();
let client = Client::tracked(rocket);

pub async fn untracked<P: Phase>(rocket: Rocket<P>) -> Result<Self, Error>

Construct a new Client from an instance of Rocket without cookie tracking.

Cookie Tracking

Unlike the tracked() constructor, a Client returned from this method does not automatically propagate cookie changes and thus requires no synchronization between dispatches.

Errors

If launching the Rocket instance would fail, excepting network errors, the Error is returned.

use rocket::local::asynchronous::Client;

let rocket = rocket::build();
let client = Client::untracked(rocket);

pub async fn new<P: Phase>(rocket: Rocket<P>) -> Result<Self, Error>

👎 Deprecated since 0.5:

choose between Client::untracked() and Client::tracked()

Deprecated alias to Client::tracked().

pub fn rocket(&self) -> &Rocket<Orbit>

Returns a reference to the Rocket this client is creating requests for.

Example

use rocket::local::asynchronous::Client;

let client: &Client = client;
let rocket = client.rocket();

pub fn cookies(&self) -> CookieJar<'_>

Returns a cookie jar containing all of the cookies this client is currently tracking.

If cookie tracking is disabled, the returned jar will always be empty. Otherwise, it will contains all of the cookies collected from responses to requests dispatched by this client that have not expired.

Example

use rocket::local::asynchronous::Client;

let client: &Client = client;
let cookie = client.cookies();

pub fn get<'c, 'u: 'c, U>(&'c self, uri: U) -> LocalRequest<'c> where
    U: TryInto<Origin<'u>> + Display, 

Create a local GET request to the URI uri.

When dispatched, the request will be served by the instance of Rocket within self. The request is not dispatched automatically. To actually dispatch the request, call LocalRequest::dispatch() on the returned request.

Example

use rocket::local::asynchronous::Client;

let client: &Client = client;
let req = client.get("/hello");

pub fn put<'c, 'u: 'c, U>(&'c self, uri: U) -> LocalRequest<'c> where
    U: TryInto<Origin<'u>> + Display, 

Create a local PUT request to the URI uri.

When dispatched, the request will be served by the instance of Rocket within self. The request is not dispatched automatically. To actually dispatch the request, call LocalRequest::dispatch() on the returned request.

Example

use rocket::local::asynchronous::Client;

let client: &Client = client;
let req = client.put("/hello");

pub fn post<'c, 'u: 'c, U>(&'c self, uri: U) -> LocalRequest<'c> where
    U: TryInto<Origin<'u>> + Display, 

Create a local POST request to the URI uri.

When dispatched, the request will be served by the instance of Rocket within self. The request is not dispatched automatically. To actually dispatch the request, call LocalRequest::dispatch() on the returned request.

Example

use rocket::local::asynchronous::Client;

let client: &Client = client;
let req = client.post("/hello");

pub fn delete<'c, 'u: 'c, U>(&'c self, uri: U) -> LocalRequest<'c> where
    U: TryInto<Origin<'u>> + Display, 

Create a local DELETE request to the URI uri.

When dispatched, the request will be served by the instance of Rocket within self. The request is not dispatched automatically. To actually dispatch the request, call LocalRequest::dispatch() on the returned request.

Example

use rocket::local::asynchronous::Client;

let client: &Client = client;
let req = client.delete("/hello");

pub fn options<'c, 'u: 'c, U>(&'c self, uri: U) -> LocalRequest<'c> where
    U: TryInto<Origin<'u>> + Display, 

Create a local OPTIONS request to the URI uri.

When dispatched, the request will be served by the instance of Rocket within self. The request is not dispatched automatically. To actually dispatch the request, call LocalRequest::dispatch() on the returned request.

Example

use rocket::local::asynchronous::Client;

let client: &Client = client;
let req = client.options("/hello");

pub fn head<'c, 'u: 'c, U>(&'c self, uri: U) -> LocalRequest<'c> where
    U: TryInto<Origin<'u>> + Display, 

Create a local HEAD request to the URI uri.

When dispatched, the request will be served by the instance of Rocket within self. The request is not dispatched automatically. To actually dispatch the request, call LocalRequest::dispatch() on the returned request.

Example

use rocket::local::asynchronous::Client;

let client: &Client = client;
let req = client.head("/hello");

pub fn patch<'c, 'u: 'c, U>(&'c self, uri: U) -> LocalRequest<'c> where
    U: TryInto<Origin<'u>> + Display, 

Create a local PATCH request to the URI uri.

When dispatched, the request will be served by the instance of Rocket within self. The request is not dispatched automatically. To actually dispatch the request, call LocalRequest::dispatch() on the returned request.

Example

use rocket::local::asynchronous::Client;

let client: &Client = client;
let req = client.patch("/hello");

pub fn req<'c, 'u: 'c, U>(&'c self, method: Method, uri: U) -> LocalRequest<'c> where
    U: TryInto<Origin<'u>> + Display, 

Create a local GET request to the URI uri.

When dispatched, the request will be served by the instance of Rocket within self. The request is not dispatched automatically. To actually dispatch the request, call LocalRequest::dispatch() on the returned request.

Example

use rocket::local::asynchronous::Client;
use rocket::http::Method;

let client: &Client = client;
client.req(Method::Get, "/hello");

Trait Implementations

impl Debug for Client

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.