Struct kvarn::prelude::Request

source ·
pub struct Request<T> { /* private fields */ }
Expand description

Represents an HTTP request.

An HTTP request consists of a head and a potentially optional body. The body component is generic, enabling arbitrary types to represent the HTTP body. For example, the body could be Vec<u8>, a Stream of byte chunks, or a value that has been deserialized.

Examples

Creating a Request to send

use http::{Request, Response};

let mut request = Request::builder()
    .uri("https://www.rust-lang.org/")
    .header("User-Agent", "my-awesome-agent/1.0");

if needs_awesome_header() {
    request = request.header("Awesome", "yes");
}

let response = send(request.body(()).unwrap());

fn send(req: Request<()>) -> Response<()> {
    // ...
}

Inspecting a request to see what was sent.

use http::{Request, Response, StatusCode};

fn respond_to(req: Request<()>) -> http::Result<Response<()>> {
    if req.uri() != "/awesome-url" {
        return Response::builder()
            .status(StatusCode::NOT_FOUND)
            .body(())
    }

    let has_awesome_header = req.headers().contains_key("Awesome");
    let body = req.body();

    // ...
}

Deserialize a request of bytes via json:

use http::Request;
use serde::de;

fn deserialize<T>(req: Request<Vec<u8>>) -> serde_json::Result<Request<T>>
    where for<'de> T: de::Deserialize<'de>,
{
    let (parts, body) = req.into_parts();
    let body = serde_json::from_slice(&body)?;
    Ok(Request::from_parts(parts, body))
}

Or alternatively, serialize the body of a request to json

use http::Request;
use serde::ser;

fn serialize<T>(req: Request<T>) -> serde_json::Result<Request<Vec<u8>>>
    where T: ser::Serialize,
{
    let (parts, body) = req.into_parts();
    let body = serde_json::to_vec(&body)?;
    Ok(Request::from_parts(parts, body))
}

Implementations

Creates a new builder-style object to manufacture a Request

This method returns an instance of Builder which can be used to create a Request.

Examples
let request = Request::builder()
    .method("GET")
    .uri("https://www.rust-lang.org/")
    .header("X-Custom-Foo", "Bar")
    .body(())
    .unwrap();

Creates a new Builder initialized with a GET method and the given URI.

This method returns an instance of Builder which can be used to create a Request.

Example

let request = Request::get("https://www.rust-lang.org/")
    .body(())
    .unwrap();

Creates a new Builder initialized with a PUT method and the given URI.

This method returns an instance of Builder which can be used to create a Request.

Example

let request = Request::put("https://www.rust-lang.org/")
    .body(())
    .unwrap();

Creates a new Builder initialized with a POST method and the given URI.

This method returns an instance of Builder which can be used to create a Request.

Example

let request = Request::post("https://www.rust-lang.org/")
    .body(())
    .unwrap();

Creates a new Builder initialized with a DELETE method and the given URI.

This method returns an instance of Builder which can be used to create a Request.

Example

let request = Request::delete("https://www.rust-lang.org/")
    .body(())
    .unwrap();

Creates a new Builder initialized with an OPTIONS method and the given URI.

This method returns an instance of Builder which can be used to create a Request.

Example

let request = Request::options("https://www.rust-lang.org/")
    .body(())
    .unwrap();

Creates a new Builder initialized with a HEAD method and the given URI.

This method returns an instance of Builder which can be used to create a Request.

Example

let request = Request::head("https://www.rust-lang.org/")
    .body(())
    .unwrap();

Creates a new Builder initialized with a CONNECT method and the given URI.

This method returns an instance of Builder which can be used to create a Request.

Example

let request = Request::connect("https://www.rust-lang.org/")
    .body(())
    .unwrap();

Creates a new Builder initialized with a PATCH method and the given URI.

This method returns an instance of Builder which can be used to create a Request.

Example

let request = Request::patch("https://www.rust-lang.org/")
    .body(())
    .unwrap();

Creates a new Builder initialized with a TRACE method and the given URI.

This method returns an instance of Builder which can be used to create a Request.

Example

let request = Request::trace("https://www.rust-lang.org/")
    .body(())
    .unwrap();

Creates a new blank Request with the body

The component parts of this request will be set to their default, e.g. the GET method, no headers, etc.

Examples
let request = Request::new("hello world");

assert_eq!(*request.method(), Method::GET);
assert_eq!(*request.body(), "hello world");

Creates a new Request with the given components parts and body.

Examples
let request = Request::new("hello world");
let (mut parts, body) = request.into_parts();
parts.method = Method::POST;

let request = Request::from_parts(parts, body);

Returns a reference to the associated HTTP method.

Examples
let request: Request<()> = Request::default();
assert_eq!(*request.method(), Method::GET);

Returns a mutable reference to the associated HTTP method.

Examples
let mut request: Request<()> = Request::default();
*request.method_mut() = Method::PUT;
assert_eq!(*request.method(), Method::PUT);

Returns a reference to the associated URI.

Examples
let request: Request<()> = Request::default();
assert_eq!(*request.uri(), *"/");

Returns a mutable reference to the associated URI.

Examples
let mut request: Request<()> = Request::default();
*request.uri_mut() = "/hello".parse().unwrap();
assert_eq!(*request.uri(), *"/hello");

Returns the associated version.

Examples
let request: Request<()> = Request::default();
assert_eq!(request.version(), Version::HTTP_11);

Returns a mutable reference to the associated version.

Examples
let mut request: Request<()> = Request::default();
*request.version_mut() = Version::HTTP_2;
assert_eq!(request.version(), Version::HTTP_2);

Returns a reference to the associated header field map.

Examples
let request: Request<()> = Request::default();
assert!(request.headers().is_empty());

Returns a mutable reference to the associated header field map.

Examples
let mut request: Request<()> = Request::default();
request.headers_mut().insert(HOST, HeaderValue::from_static("world"));
assert!(!request.headers().is_empty());

Returns a reference to the associated extensions.

Examples
let request: Request<()> = Request::default();
assert!(request.extensions().get::<i32>().is_none());

Returns a mutable reference to the associated extensions.

Examples
let mut request: Request<()> = Request::default();
request.extensions_mut().insert("hello");
assert_eq!(request.extensions().get(), Some(&"hello"));

Returns a reference to the associated HTTP body.

Examples
let request: Request<String> = Request::default();
assert!(request.body().is_empty());

Returns a mutable reference to the associated HTTP body.

Examples
let mut request: Request<String> = Request::default();
request.body_mut().push_str("hello world");
assert!(!request.body().is_empty());

Consumes the request, returning just the body.

Examples
let request = Request::new(10);
let body = request.into_body();
assert_eq!(body, 10);

Consumes the request returning the head and body parts.

Examples
let request = Request::new(());
let (parts, body) = request.into_parts();
assert_eq!(parts.method, Method::GET);

Consumes the request returning a new request with body mapped to the return type of the passed in function.

Examples
let request = Request::builder().body("some string").unwrap();
let mapped_request: Request<&[u8]> = request.map(|b| {
  assert_eq!(b, "some string");
  b.as_bytes()
});
assert_eq!(mapped_request.body(), &"some string".as_bytes());

Trait Implementations

Formats the value using the given formatter. Read more
Returns the “default value” for a type. Read more

Auto Trait Implementations

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Returns the argument unchanged.

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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.
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