handlebars_template.rs

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#![deny(warnings)]

use std::sync::Arc;

use handlebars::Handlebars;

use serde::Serialize;

use serde_json::json;

use warp::Filter;

struct WithTemplate<T: Serialize> {

    name: &'static str,

    value: T,

fn render<T>(template: WithTemplate<T>, hbs: Arc<Handlebars<'_>>) -> impl warp::Reply

where

    T: Serialize,

    let render = hbs

        .render(template.name, &template.value)

        .unwrap_or_else(|err| err.to_string());

    warp::reply::html(render)

#[tokio::main]

async fn main() {

    let template = "<!DOCTYPE html>

                    <html>

                      <head>

                        <title>Warp Handlebars template example</title>

                      </head>

                      <body>

                        <h1>Hello {{user}}!</h1>

                      </body>

                    </html>";

    let mut hb = Handlebars::new();

    // register the template

    hb.register_template_string("template.html", template)

        .unwrap();

    // Turn Handlebars instance into a Filter so we can combine it

    // easily with others...

    let hb = Arc::new(hb);

    // Create a reusable closure to render template

    let handlebars = move |with_template| render(with_template, hb.clone());

    //GET /

    let route = warp::get()

        .and(warp::path::end())

        .map(|| WithTemplate {

            name: "template.html",

            value: json!({"user" : "Warp"}),

})

        .map(handlebars);

    warp::serve(route).run(([127, 0, 0, 1], 3030)).await;