rust actix + reqwest

main.rs

use actix_web::{web, App, HttpResponse, HttpServer};
use reqwest::Client;
use serde_json::Value;

async fn test(data: web::Data<AppState>) -> HttpResponse {
    let client = &data.client;

    let result = async {
        client
            .get("https://httpbin.org/json")
            .send()
            .await?
            .error_for_status()?
            .json::<Value>()
            .await
    }
    .await;

    match result {
        Ok(v) => HttpResponse::Ok().content_type("application/json").body(v),
        Err(e) => HttpResponse::InternalServerError().body(e.to_string()),
    }
}

struct AppState {
    client: Client,
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    let app_state = web::Data::new(AppState {
        client: Client::new(),
    });

    HttpServer::new(move || {
        App::new()
            .app_data(app_state.clone()) // <- register the created data
            .route("/", web::get().to(test))
    })
    .bind(("127.0.0.1", 8080))?
    .run()
    .await
}