ytb - 50 Rustlang Project

Actix Web, Rhai Script + Rust

cargo new actix-sim-yt

依赖

[dependencies]
actix-web = "4.0.1"
rhai = "1.6.1"

项目结构

rhai脚本

rust程序里使用rhai的engine来调用rhai脚本,实现某些操作

add.rhai

fn add(num1,num2){
    return num1 + num2;
}
let num1 = num1();
let num2 = num2();
add(num1,num2);

multiply.rhai

fn multiply(num1,num2){
    return num1 * num2;
}
let num1 = num1();
let num2 = num2();
multiply(num1,num2);

main.rs

use actix_web::{
    HttpServer,
    get,
    App,
    web::Path,
    Responder
};
use rhai::Engine;

#[get("/multiply/{num1}/{num2}")]
async fn multiply(path: Path<(i64,i64)>)->impl Responder{
    let (num1,num2) = path.into_inner();
    let mut engine = Engine::new();
    // 暴露变量给rhai
    engine.register_fn("num1",move || num1);
    engine.register_fn("num2",move || num2);
    let res = engine.eval_file::<i64>("src/multiply.rhai".into()).unwrap();
    format!("{res}")
}
#[get("/add/{num1}/{num2}")]
async fn add(path: Path<(i64,i64)>)->impl Responder{
    let (num1,num2) = path.into_inner();
    let mut engine = Engine::new();
    // 暴露变量给rhai
    engine.register_fn("num1",move || num1);
    engine.register_fn("num2",move || num2);
    let res = engine.eval_file::<i64>("src/add.rhai".into()).unwrap();
    format!("{res}")
}
#[actix_web::main]
async fn main()->std::io::Result<()> {
    HttpServer::new(|| {
        App::new() 
            // 注册服务
            .service(multiply)
            .service(add)
    })
    .bind(("127.0.0.1",8080))
    .unwrap()
    .run()
    .await
}

test

Extract Links

cargo new links-extrack

依赖

[dependencies]
error-chain = "0.12.4"
reqwest = "0.11.12"
select = "0.5.0"
tokio = { version = "1.21.2", features = ["full"] }

main.rs

use error_chain::error_chain;
use select::document::Document;
use select::predicate::Name;
// 错误处理
error_chain! {
    foreign_links{
        Reqerror(reqwest::Error);
        IoError(std::io::Error);
    }
}
#[tokio::main]
async fn main()->Result<()> {
    let res=reqwest::get("http://www.rust-lang.org/zh-CN/")
        .await?
        .text() // 获取文本
        .await?;
    Document::from(res.as_str())
        // 找到a标签
        .find(Name("a"))
        // 过滤得到带href属性的
        .filter_map(|n| n.attr("href"))
        .for_each(|x| println!("{}", x));
    Ok(())
}