Getting 400 for post request that receives JSON

[KisaragiEffective]

Given the code:

async fn post<'de, D: Deserialize<'de>, S: Serialize, F: 'static + Copy + FnOnce(D) -> S>(this: Arc<JsonHandler<'de, D, S, F>>, Json(request): actix_web::web::Json<D>) -> impl Responder {
    dbg!("enter");
    let client = reqwest::Client::new();
    let x = &(this.f)(request);
    let result = client.post(this.to).json(x).send().await.map(|_| ()).map_err(|x| anyhow!(x));
    match result {
        Ok(_) => {
            HttpResponse::NoContent()
        }
        Err(e) => {
            eprintln!("ERROR!!!: {:?}", e);
            HttpResponse::NotModified()
        }
    }
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    dbg!("start");
    HttpServer::new(|| {
        App::new()
            .service(
                web::resource("/foobar")
                    .route(
                        web::post()
                            .guard(guard::Header("content-type", "application/json"))
                            .to(|a| h::<'static, TodoistPayload, DiscordWebhookPayload, _>( Arc::new(JsonHandler::new(
                                "https://discord.com/api/webhooks/xxxxxr",
                                |a: TodoistPayload| {
                                    DiscordWebhookPayload {
                                        content: "Yeah!".to_string(),
                                        username: None,
                                        avatar_url: None,
                                        tts: false,
                                        embeds: Default::default(),
                                        components: Default::default()
                                    }
                                }
                            )), a))
                    )
            )
    })
        .bind("127.0.0.1:8080")?
        .run()
        .await;

    dbg!("stop");
    Ok(())
}

When I try POST by curl -v -X POST -H "content-type: application/json" -d "{}" http://127.0.0.1:8080/foobar, I get always the 400.

I thought that was caused by serialization error: it does not have any required properties.
Could I get 203 if I give valid JSON?

[aliemjay]

You can take a look at error::JsonPayloadError for the several reasons why Json extractor could fail.

JsonConfig can be used to customize error handling. Alternatively, You can handle errors manually in the handler by using Result<Json<D>, Error> as extractor instead of Json<D>.

[KisaragiEffective]

Hi, the thing that I wanted contained at https://github.com/actix/examples/blob/master/json/json_decode_error/src/main.rs! Thanks for answer :)