2022-10-16 21:36:23 +01:00
|
|
|
use actix_utils::future::{ready, Ready};
|
2022-10-16 21:20:01 +01:00
|
|
|
use std::collections::HashMap;
|
|
|
|
|
|
|
|
|
|
use actix_web::{
|
2022-10-16 21:36:23 +01:00
|
|
|
dev::{self, ServiceResponse},
|
2022-10-16 21:20:01 +01:00
|
|
|
error,
|
|
|
|
|
http::{header::ContentType, StatusCode},
|
|
|
|
|
middleware::{ErrorHandlerResponse, ErrorHandlers, Logger},
|
2022-10-16 21:36:23 +01:00
|
|
|
web, App, FromRequest, HttpRequest, HttpResponse, HttpServer, Responder, Result,
|
2022-10-16 21:20:01 +01:00
|
|
|
};
|
|
|
|
|
use actix_web_lab::respond::Html;
|
|
|
|
|
|
2022-10-16 21:36:23 +01:00
|
|
|
#[derive(Debug)]
|
|
|
|
|
struct MiniJinjaRenderer {
|
2022-10-16 21:20:01 +01:00
|
|
|
tmpl_env: web::Data<minijinja::Environment<'static>>,
|
2022-10-16 21:36:23 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
impl MiniJinjaRenderer {
|
|
|
|
|
fn render(
|
|
|
|
|
&self,
|
|
|
|
|
tmpl: &str,
|
|
|
|
|
ctx: impl Into<minijinja::value::Value>,
|
|
|
|
|
) -> actix_web::Result<Html> {
|
|
|
|
|
self.tmpl_env
|
|
|
|
|
.get_template(tmpl)
|
|
|
|
|
.map_err(|_| error::ErrorInternalServerError("could not find template"))?
|
|
|
|
|
.render(ctx.into())
|
|
|
|
|
.map(Html)
|
|
|
|
|
.map_err(|err| {
|
|
|
|
|
log::error!("{err}");
|
|
|
|
|
error::ErrorInternalServerError("template error")
|
|
|
|
|
})
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
impl FromRequest for MiniJinjaRenderer {
|
|
|
|
|
type Error = actix_web::Error;
|
|
|
|
|
type Future = Ready<Result<Self, Self::Error>>;
|
|
|
|
|
|
|
|
|
|
fn from_request(req: &HttpRequest, payload: &mut dev::Payload) -> Self::Future {
|
|
|
|
|
let tmpl_env = <web::Data<minijinja::Environment<'static>>>::from_request(req, payload)
|
|
|
|
|
.into_inner()
|
|
|
|
|
.unwrap();
|
|
|
|
|
|
|
|
|
|
ready(Ok(Self { tmpl_env }))
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
async fn index(
|
|
|
|
|
tmpl_env: MiniJinjaRenderer,
|
2022-10-16 21:20:01 +01:00
|
|
|
query: web::Query<HashMap<String, String>>,
|
2022-10-16 21:36:23 +01:00
|
|
|
) -> actix_web::Result<impl Responder> {
|
|
|
|
|
if let Some(name) = query.get("name") {
|
|
|
|
|
tmpl_env.render(
|
|
|
|
|
"user.html",
|
|
|
|
|
minijinja::context! {
|
|
|
|
|
name,
|
|
|
|
|
text => "Welcome!",
|
|
|
|
|
},
|
|
|
|
|
)
|
2022-10-16 21:20:01 +01:00
|
|
|
} else {
|
2022-10-16 21:36:23 +01:00
|
|
|
tmpl_env.render("index.html", ())
|
|
|
|
|
}
|
2022-10-16 21:20:01 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#[actix_web::main]
|
|
|
|
|
async fn main() -> std::io::Result<()> {
|
|
|
|
|
env_logger::init_from_env(env_logger::Env::new().default_filter_or("info"));
|
|
|
|
|
|
|
|
|
|
log::info!("starting HTTP server at http://localhost:8080");
|
|
|
|
|
|
|
|
|
|
let mut env: minijinja::Environment<'static> = minijinja::Environment::new();
|
|
|
|
|
env.set_source(minijinja::Source::from_path(concat!(
|
|
|
|
|
env!("CARGO_MANIFEST_DIR"),
|
|
|
|
|
"/templates"
|
|
|
|
|
)));
|
|
|
|
|
|
|
|
|
|
HttpServer::new(move || {
|
|
|
|
|
App::new()
|
|
|
|
|
.app_data(web::Data::new(env.clone()))
|
|
|
|
|
.service(web::resource("/").route(web::get().to(index)))
|
|
|
|
|
.wrap(ErrorHandlers::new().handler(StatusCode::NOT_FOUND, not_found))
|
|
|
|
|
.wrap(Logger::default())
|
|
|
|
|
})
|
|
|
|
|
.workers(2)
|
|
|
|
|
.bind(("127.0.0.1", 8080))?
|
|
|
|
|
.run()
|
|
|
|
|
.await
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// Error handler for a 404 Page not found error.
|
|
|
|
|
fn not_found<B>(svc_res: ServiceResponse<B>) -> Result<ErrorHandlerResponse<B>> {
|
|
|
|
|
let res = get_error_response(&svc_res, "Page not found");
|
|
|
|
|
|
|
|
|
|
Ok(ErrorHandlerResponse::Response(ServiceResponse::new(
|
|
|
|
|
svc_res.into_parts().0,
|
|
|
|
|
res.map_into_right_body(),
|
|
|
|
|
)))
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// Generic error handler.
|
|
|
|
|
fn get_error_response<B>(res: &ServiceResponse<B>, error: &str) -> HttpResponse {
|
|
|
|
|
let req = res.request();
|
|
|
|
|
|
2022-10-16 21:36:23 +01:00
|
|
|
let tmpl_env = MiniJinjaRenderer::extract(req).into_inner().unwrap();
|
|
|
|
|
|
2022-10-16 21:20:01 +01:00
|
|
|
// Provide a fallback to a simple plain text response in case an error occurs during the
|
|
|
|
|
// rendering of the error page.
|
|
|
|
|
let fallback = |err: &str| {
|
|
|
|
|
HttpResponse::build(res.status())
|
|
|
|
|
.content_type(ContentType::plaintext())
|
|
|
|
|
.body(err.to_string())
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
let ctx = minijinja::context! {
|
|
|
|
|
error => error,
|
|
|
|
|
status_code => res.status().as_str(),
|
|
|
|
|
};
|
|
|
|
|
|
2022-10-16 21:36:23 +01:00
|
|
|
match tmpl_env.render("error.html", ctx) {
|
|
|
|
|
Ok(body) => body
|
2022-10-16 21:20:01 +01:00
|
|
|
.customize()
|
|
|
|
|
.with_status(res.status())
|
2022-10-16 21:36:23 +01:00
|
|
|
.respond_to(req)
|
2022-10-16 21:20:01 +01:00
|
|
|
.map_into_boxed_body(),
|
|
|
|
|
|
2022-10-16 21:36:23 +01:00
|
|
|
Err(_) => fallback(error),
|
2022-10-16 21:20:01 +01:00
|
|
|
}
|
|
|
|
|
}
|
