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use std::fs::File;
use std::io::{ErrorKind, Read};
use std::path::PathBuf;
use std::rc::Rc;
use hyper::{Body, Request, Response, StatusCode};
use rhai::{Dynamic, FnPtr, Map};
#[derive(Clone, Debug)]
pub struct Params {
root: PathBuf,
}
#[derive(Debug)]
pub struct KeyError(&'static str);
impl TryFrom<Map> for Params {
type Error = KeyError;
fn try_from(mut value: Map) -> Result<Self, Self::Error> {
let root = value
.remove("root")
.and_then(|value| value.into_immutable_string().ok())
.ok_or(KeyError("root"))?;
let root: PathBuf = root.parse().unwrap();
let root = root.canonicalize().unwrap();
Ok(Self { root })
}
}
pub fn handle_request(params: &mut Params, request: Rc<Request<Body>>) -> Rc<Response<Body>> {
let Params { root } = params;
eprintln!("handling request {:?}", request);
let request_path = request.uri().path();
let request_path = request_path.trim_start_matches("/");
let target = root.join(request_path);
let target = if target.is_dir() {
target.join("index.html")
} else {
target
};
eprintln!("target is {}", target.display());
let response = if target.ancestors().all(|ancestor| ancestor != root) {
// oops! all directory traversal
Response::builder()
.status(StatusCode::BAD_REQUEST)
.body(Body::empty())
} else {
let file = File::open(target);
match file {
Ok(mut file) => {
let mut result = Vec::new();
file.read_to_end(&mut result).unwrap();
Response::builder().body(Body::from(result))
}
Err(err) => {
let status_code = match err.kind() {
ErrorKind::NotFound => StatusCode::NOT_FOUND,
_ => StatusCode::BAD_REQUEST,
};
Response::builder()
.status(status_code)
.body(Body::from(status_code.canonical_reason().unwrap_or("")))
}
}
};
Rc::new(response.unwrap())
}
pub fn serve_static(params: Map) -> FnPtr {
let params: Params = params.try_into().unwrap();
let mut result = FnPtr::new("handle_request_serve_static").unwrap();
result.add_curry(Dynamic::from(params));
result
}
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