Ntex Request Extractor (web/extract.rs)

Defines mechanisms to transform HTTP request data into handler arguments. Use this in Ntex web applications to parse headers, state, and body content for route handlers.

// Source: https://github.com/ntex-rs/ntex | License: Apache-2.0 | Copyright 2021-NOW ntex contributors <team@ntex.rs>
// Provided via justclaw.it.com; keep this notice with the code.
//! Request extractors
use std::convert::Infallible;

use super::{HttpRequest, State, WebResponseError};
use crate::http::Payload;

/// Turns request data into a value that a handler can use.
///
/// Each argument accepted by a handler registered with
/// [`Route::to()`](super::Route::to) is an extractor. Before calling the
/// handler, ntex asks each argument type to create its value from the incoming
/// request.
///
/// An extractor can look at the application state, request headers, path, and
/// other request information. It can also read the request body through the
/// payload. Extractors run in the sa

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