actix-web-validation 0.8.0

#![cfg(not(test))]

use actix_web::{
    post, web::Json, App, HttpRequest, HttpResponse, HttpServer, Responder, ResponseError,
};
use actix_web_validation::{garde::GardeErrorHandlerExt, Validated};
use derive_more::Display;
use garde::Validate;
use serde::{Deserialize, Serialize};
use std::sync::Arc;

/// To run this example use `cargo r --example garde_custom_error_response --features garde`
///
/// Once the server is running you can test with
/// ```
/// curl -X POST localhost:8080/example --json '{"name": "foo"}'
/// ```
///
/// Changing the length of the name should result to more than 4 chars should result in HTTP 200

#[derive(Debug, Serialize, Deserialize, Validate)]
struct Example {
    #[garde(length(min = 5))]
    name: String,
}

#[post("/example")]
async fn example(Validated(Json(payload)): Validated<Json<Example>>) -> impl Responder {
    println!("Got validated payload {:#?}", payload);

    HttpResponse::Ok().body(format!("Hello {}", payload.name))
}

#[derive(Debug, Serialize, Display)]
#[display("My custom error. This is just an example from the derive_more crate")]
struct CustomErrorResponse {
    custom_message: String,
    errors: Vec<String>,
}

impl ResponseError for CustomErrorResponse {
    fn status_code(&self) -> actix_web::http::StatusCode {
        actix_web::http::StatusCode::BAD_REQUEST
    }

    fn error_response(&self) -> HttpResponse<actix_web::body::BoxBody> {
        HttpResponse::build(self.status_code()).body(serde_json::to_string(self).unwrap())
    }
}

fn error_handler(errors: ::garde::Report, _: &HttpRequest) -> actix_web::Error {
    CustomErrorResponse {
        custom_message: "My custom message".to_string(),
        errors: errors.iter().map(|(_, err)| err.to_string()).collect(),
    }
    .into()
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(|| {
        App::new()
            .service(example)
            .garde_error_handler(Arc::new(error_handler))
    })
    .bind(("127.0.0.1", 8080))?
    .run()
    .await
}