Actix-Web reports “App data is not configured” when processing a file upload

Question

I\'m using the Actix framework to create a simple server and I\'ve implemented a file upload using a simple HTML frontend.

use actix_web::web::Data;
use acti         


        

Answer 1

I asked people in the rust-jp community to tell you the correct answer.

Use Arc outer HttpServer.

/*
~~~Cargo.toml
[package]
name = "actix-data-example"
version = "0.1.0"
authors = ["ncaq <ncaq@ncaq.net>"]
edition = "2018"

[dependencies]
actix-web = "1.0.0-rc"
env_logger = "0.6.0"
~~~
 */

use actix_web::*;
use std::sync::*;

fn main() -> std::io::Result<()> {
    std::env::set_var("RUST_LOG", "actix_web=trace");
    env_logger::init();

    let data = Arc::new(Mutex::new(ActixData::default()));
    HttpServer::new(move || {
        App::new()
            .wrap(middleware::Logger::default())
            .data(data.clone())
            .service(web::resource("/index/").route(web::get().to(index)))
            .service(web::resource("/create/").route(web::get().to(create)))
    })
    .bind("0.0.0.0:3000")?
    .run()
}

fn index(actix_data: web::Data<Arc<Mutex<ActixData>>>) -> HttpResponse {
    println!("actix_data: {:?}", actix_data);
    HttpResponse::Ok().body(format!("{:?}", actix_data))
}

fn create(actix_data: web::Data<Arc<Mutex<ActixData>>>) -> HttpResponse {
    println!("actix_data: {:?}", actix_data);
    actix_data.lock().unwrap().counter += 1;
    HttpResponse::Ok().body(format!("{:?}", actix_data))
}

/// actix-webが保持する状態
#[derive(Debug, Default)]
struct ActixData {
    counter: usize,
}

This post report to upstream. Official document data cause App data is not configured, to configure use App::data() · Issue #874 · actix/actix-web

Answer 2

You have to register your data before you can use it:

App::new().data(AppState::new())