Rust语言Actix-web框架连接Redis数据库

Rust语言Actix-web框架连接Redis数据库

actix-web2.0终于发布了，不再是测试版本，基于actor系统再加上异步支持，使得actix-web成为了目前响应速度最快的服务器框架，本来计划使用deadpool-redis来写这篇博客，更新了一下actix-web的官方例子，发现actix团队新增加了一个actix-redis库，暂且尝鲜。

准备工作

框架	描述	版本号
actix-web	rust 基于actor的异步网络库	2.0
actix-rt	actix运行时	1.0
redis-async	redis异步连接库,通过Tokio框架和Rustfuture语法编写	0.6.1
actix-redis	redis连接管理工具	0.8.0
actix	actix核心库	0.9.0

Cargo.toml

[package]
name = "cloud_test"
version = "0.1.0"
authors = ["yuxq"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
actix = "0.9.0"
actix-web = "2.0"
actix-rt = "1.0"
actix-redis = "0.8.0"
redis-async = "0.6.1"

## 连接Redis

导入需要的包

#[macro_use]
extern crate redis_async;
//use serde::Deserialize;
use actix::prelude::*;
use actix_redis::{Command, RedisActor, Error};
use actix_web::{middleware, web, App, Error as AWError, HttpResponse, HttpServer, Responder};
use redis_async::resp::RespValue;

准备连接

        let redis_addr = RedisActor::start("localhost:6379");

绑定到actix-web中

    HttpServer::new(|| {
        let redis_addr = RedisActor::start("localhost:6379");
        App::new().data(redis_addr)
            .route("/set", web::get().to(set))
            .route("/get", web::get().to(get))
//            .route("/again", web::get().to(index2))
    })
        .bind("127.0.0.1:8088")?
        .run()
        .await

准备两个测试接口，一个设置redis值，一个获取Redis值

async fn set(redis: web::Data<Addr<RedisActor>>) -> Result<HttpResponse, AWError> {
//    let result:Result<RespValue,Error> = redis.send(Command(resp_array!["SET","myname","myvalue"])).await?;
    let result=redis.send(Command(resp_array!["set","name","myvalue"])).await?;

    match result {
        Ok(RespValue::SimpleString(s)) if s == "OK" => {
            Ok(HttpResponse::Ok().body("Set values success!"))
        }
        _ => {
            println!("---->{:?}", result);
            Ok(HttpResponse::InternalServerError().finish())
        }
    }
}

async fn get(redis:web::Data<Addr<RedisActor>>)-> Result<HttpResponse, AWError> {
    let result=redis.send(Command(resp_array!["get","name"])).await?;
    match result{
        Ok(RespValue::BulkString(s)) =>{
            Ok(HttpResponse::Ok().body(s))
        }
        _ => {
            println!("---->{:?}", result);
            Ok(HttpResponse::InternalServerError().finish())
        }
    }

}

访问 localhost:8088/set

之后在访问 localhost:8088/get

由于rust是强类型，所以需要注意返回值类型，设置时返回的类型是SimpleString,获取时返回的是BulkString,关注一下失败的log，会显示返回的类型。