The LINE Messaging API SDK for Rust makes it easy to develop bots using LINE Messaging API, and you can create a sample bot within minutes.
See the official API documentation for more information.
- English: https://developers.line.biz/en/docs/messaging-api/overview/
- Japanese: https://developers.line.biz/ja/docs/messaging-api/overview/
- Rust 1.75.0 or later (stable)
$ cargo add line-bot-sdk-rustExtract x-line-signature from the request header.
[dependencies.line-bot-sdk-rust]
version = "3.0.0"
features = ["rocket_support"]use line_bot_sdk_rust::support::rocket::Signature;
use rocket::{http::Status, post};
#[post("/callback", data = "<body>")]
async fn world(signature: Signature, body: String) -> (Status, &'static str) {
...
}[dependencies.line-bot-sdk-rust]
version = "3.0.0"
features = ["actix_support"]use actix_web::{post, web, Error, HttpResponse};
use line_bot_sdk_rust::support::actix::Signature;
#[post("/callback")]
async fn callback(signature: Signature, bytes: web::Bytes) -> Result<HttpResponse, Error> {
...
}[dependencies.line-bot-sdk-rust]
version = "3.0.0"
features = ["axum_support"]use line_bot_sdk_rust::support::axum::Signature;
async fn callback(
signature: Signature,
body: String,
) -> Result<&'static str, (axum::http::StatusCode, String)> {
...
}use line_bot_sdk_rust::client::LINE;
use std::env;
fn main() {
let access_token: &str =
&env::var("LINE_CHANNEL_ACCESS_TOKEN").expect("Failed to get LINE_CHANNEL_ACCESS_TOKEN");
let line = LINE::new(access_token.to_string());
}use line_bot_sdk_rust::client::LINE;
use std::time::Duration;
fn main() {
let line = LINE::builder(access_token.to_string())
.timeout(Duration::from_secs(30))
.build();
}The LINE Messaging API uses the JSON data format.
Example. Parse body (&str) into Result<CallbackRequest, serde_json::Error>.
let request: Result<CallbackRequest, serde_json::Error> = serde_json::from_str(body);match request {
Err(err) => {
// error handling
},
Ok(req) => {
for e in req.events {
// Processing for various events
}
}
}All examples require LINE_CHANNEL_SECRET and LINE_CHANNEL_ACCESS_TOKEN environment variables.
Create an .env file inside the examples/ directory:
LINE_CHANNEL_SECRET=your_channel_secret
LINE_CHANNEL_ACCESS_TOKEN=your_channel_access_token$ cd examples
$ cargo run --bin rocketsource: rocket example
$ cd examples
$ cargo run --bin actix_websource: actix-web example
A comprehensive example demonstrating multiple event handlers and slash commands (/help, /profile, /botinfo, /ginfo, /flex, /leave).
The /flex command loads a Flex Message from an external JSON file (static/flex_sample.json), so you can customize the message design without recompiling.
$ cd examples
$ cargo run --bin axumsource: axum example
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