actix-website/examples/extractors/src/form.rs

// <form>
use actix_web::{web, App, HttpServer, Result};
use serde::Deserialize;

#[derive(Deserialize)]
struct FormData {
    username: String,
}

/// extract form data using serde
/// this handler gets called only if the content type is *x-www-form-urlencoded*
/// and the content of the request could be deserialized to a `FormData` struct
fn index(form: web::Form<FormData>) -> Result<String> {
    Ok(format!("Welcome {}!", form.username))
}
// </form>

pub fn main() {
    HttpServer::new(|| App::new().route("/", web::post().to(index)))
        .bind("127.0.0.1:8088")
        .unwrap()
        .run()
        .unwrap();
}