Rust actix web example to call a mssql server 01.03.21

Cargo.toml: 
[package]
name = "sapir"
version = "0.1.0"
authors = ["veto"]
edition = "2018"

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

[dependencies]
actix-web = "3"
typename = "0.1.1"
serde = { version = "1.0", features = ["derive"] }
tiberius = {version ="0.5.9"}
anyhow = {version='1.0.34'}
async-std = {version = "1.9.0", features = ["attributes"]}
futures = {versions="0.3.12"}

src/main.rs:

use actix_web::{get, web, App, HttpServer, Responder};
use serde::{Serialize, Deserialize};
use tiberius::{Client, Config, AuthMethod};
use async_std::net::TcpStream;

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(|| {
        App::new()
            .service(test)
    })
    .bind("127.0.0.1:8089")?
    .run()
    .await
}

#[get("/")]
async fn test() -> impl Responder {
  let r = mssql().await.unwrap();
  //println!("{:?}", r);
  return web::Json(r)
}
rust actix web example to call a mssql server
and return an API json:

async fn mssql() ->anyhow::Result<Vec<Stock>> {
    let mut _config = Config::new();
    _config.host("8.8.8.8");
    _config.port(1433);
    _config.authentication(AuthMethod::sql_server("USERNAME", "PASSWORD"));
    _config.trust_cert();

let _tcp = TcpStream::connect(_config.get_addr()).await?;
    _tcp.set_nodelay(true)?;
    let mut client = Client::connect(_config, _tcp).await?;
    let  stream = client.query("SELECT top 5 s.yz3_qty AS qty,s.yz3_style AS style  FROM SL.dbo.yz3_stock AS s WHERE s.yz3_location = 1 AND s.yz3_style NOT IN ('','**')", &[&"B%"]).await.unwrap();

let mut _vec = stream.into_results().await?;
    let mut stock:Vec<Stock> = Vec::new();
    for i in _vec.into_iter()
    {
      for row in i.into_iter()
      {
        let _cols = row.columns();
        let _qty: Option<i32> = row.get("qty");
        let _style: Option<&str> = row.get("style");
        stock.push(Stock{style:_style.unwrap().to_string(), qty:_qty.unwrap()});
      }
    }
    Ok(stock)
}

// Helper Functions
//fn print_type_of<T>(_: &T) {
//    println!("{}", std::any::type_name::<T>())
//}

#[derive(Serialize, Deserialize, Debug)]
struct Stock {
  style: String,
  qty: i32,
}

source: 
* https://docs.rs/tiberius/0.5.9/tiberius/index.html
* https://actix.rs/

https://actix.rs/

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Rust actix web example to call a mssql server 01.03.21

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