line-bot-sdk-rust 3.0.0

LINE Messaging API SDK for Rust
Documentation 
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/*
* Copyright 2023 nanato12
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

//! Rocket framework integration for LINE webhook signature extraction.

use rocket::{
    http::Status,
    request::{FromRequest, Outcome, Request},
};

/// Extracts the `x-line-signature` header value from a Rocket request.
///
/// Implements [`FromRequest`] so it can be used as a request guard.
///
/// # Example
///
/// ```ignore
/// use line_bot_sdk_rust::support::rocket::Signature;
/// use rocket::{http::Status, post};
///
/// #[post("/callback", data = "<body>")]
/// async fn callback(signature: Signature, body: String) -> (Status, &'static str) {
///     // Use signature.key for validation
///     (Status::Ok, "OK")
/// }
/// ```
#[derive(Debug)]
pub struct Signature {
    /// The value of the `x-line-signature` header.
    pub key: String,
}

#[rocket::async_trait]
impl<'r> FromRequest<'r> for Signature {
    type Error = String;

    async fn from_request(request: &'r Request<'_>) -> Outcome<Self, Self::Error> {
        let token = request.headers().get_one("x-line-signature");
        match token {
            Some(token) => Outcome::Success(Signature {
                key: token.to_string(),
            }),
            None => Outcome::Error((
                Status::BadRequest,
                "x-line-signature is missing".to_string(),
            )),
        }
    }
}