Rocket - process Query String of a GET request

Part of the Rocket series.

examples/rocket/query-string/Cargo.toml

[package]
name = "query-string"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
rocket = "0.5"
rocket_dyn_templates = { version = "0.1", features = ["tera"] }

examples/rocket/query-string/src/main.rs

#[macro_use]
extern crate rocket;

use rocket_dyn_templates::{context, Template};


#[get("/")]
fn index() -> Template {
    Template::render("index", context! {})
}

#[get("/show?<shape>&<color>")]
fn show(shape: String, color: String) -> Template {
    println!("shape: {} {}", shape, color);

    Template::render(
        "show",
        context! {
            shape: shape,
            color: color
        },
    )
}

#[launch]
fn rocket() -> _ {
    rocket::build()
        .mount("/", routes![index, show])
        .attach(Template::fairing())
}

#[cfg(test)]
mod tests;

examples/rocket/query-string/src/tests.rs

use rocket::http::Status;
use rocket::local::blocking::Client;

#[test]
fn main_page() {
    let client = Client::tracked(super::rocket()).unwrap();
    let response = client.get("/").dispatch();

    assert_eq!(response.status(), Status::Ok);
    assert_eq!(
        response.headers().get_one("Content-Type").unwrap(),
        "text/html; charset=utf-8"
    );
    assert!(response.into_string().unwrap().contains("<h1>Show</h1>"));
}

#[test]
fn show_page() {
    let client = Client::tracked(super::rocket()).unwrap();
    let response = client
        .get("/show?color=blue&shape=circle")
        .dispatch();

    assert_eq!(response.status(), Status::Ok);
    assert_eq!(
        response.headers().get_one("Content-Type").unwrap(),
        "text/html; charset=utf-8"
    );
    assert_eq!(
        response.into_string(),
        Some("You selected <b>circle</b> and <b>blue</b>".into())
    );
}

examples/rocket/query-string/templates/index.html.tera

<h1>Show</h1>
<form method="GET" action="/show">
<input name="shape" type="radio" value="square"> square
<input name="shape" type="radio" value="circle"> circle
<input name="shape" type="radio" value="triangle"> triangle
<input name="color" type="text">
<input type="submit" value="Show">
</form>

examples/rocket/query-string/templates/show.html.tera

You selected <b>{{ shape }}</b> and <b>{{ color }}</b>

TODO

• Add more data types to the form and how we handle it
• Add checkbox with multiple values.