Struct ResponseMutations 

pub struct ResponseMutations {
    pub headers: Vec<(String, Vec<u8>)>,
    pub cookies: Vec<Cookie>,
    pub delete_cookies: Vec<String>,
}

Mutable response container for setting response headers and cookies.

This extractor allows handlers to set additional response headers and cookies that will be merged into the final response. The handler’s return value determines the status code and body; ResponseMut adds headers on top.

Example

use fastapi_core::extract::ResponseMut;
use fastapi_core::response::Json;

async fn handler(mut resp: ResponseMut) -> Json<Data> {
    resp.header("X-Custom-Header", "custom-value");
    resp.cookie("session", "abc123");
    Json(data)
}

Fields

headers: Vec<(String, Vec<u8>)>

Headers to add to the response.

cookies: Vec<Cookie>

Cookies to set (name, value, attributes).

delete_cookies: Vec<String>

Cookies to delete.

Implementations

impl ResponseMutations

pub fn new() -> Self

Create empty response mutations.

pub fn add_header(&mut self, name: impl Into<String>, value: impl Into<Vec<u8>>)

Add a header.

pub fn add_cookie(&mut self, cookie: Cookie)

Set a cookie.

pub fn remove_cookie(&mut self, name: impl Into<String>)

Delete a cookie by name.

pub fn apply(self, response: Response) -> Response

Apply mutations to a response.

Trait Implementations

impl Clone for ResponseMutations

fn clone(&self) -> ResponseMutations

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ResponseMutations

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

Formats the value using the given formatter.

impl Default for ResponseMutations

fn default() -> ResponseMutations

Returns the “default value” for a type.

impl FromRequest for ResponseMutations

type Error = Infallible

Error type when extraction fails.

async fn from_request( _ctx: &RequestContext, req: &mut Request, ) -> Result<Self, Self::Error>

Extract a value from the request.