From 3817ec811d76b91d3d4924003a4d48d0cd43a576 Mon Sep 17 00:00:00 2001 From: Melody Horn Date: Fri, 24 Dec 2021 16:25:51 -0700 Subject: rust is a myth. it doesn't exist --- src/main.rs | 121 +++++++++++++++++++++------------------------- src/utils.rs | 8 +++ src/utils/proxy_child.rs | 69 ++++++++++++-------------- src/utils/serve_static.rs | 102 +++++++++++++++++--------------------- 4 files changed, 137 insertions(+), 163 deletions(-) (limited to 'src') diff --git a/src/main.rs b/src/main.rs index 0951518..f284b75 100644 --- a/src/main.rs +++ b/src/main.rs @@ -1,86 +1,87 @@ +use std::collections::HashMap; use std::convert::Infallible; +use std::fs::read_to_string; use std::net::SocketAddr; use std::path::PathBuf; -use std::rc::Rc; use std::sync::Arc; use hyper::service::{make_service_fn, service_fn}; use hyper::{header, Body, Request, Response, Server, StatusCode}; -use rhai::{Dynamic, Engine, FnPtr, Map, NativeCallContext, Scope}; +use serde::Deserialize; use structopt::StructOpt; mod utils; +use utils::HttpHandler; #[derive(Debug, StructOpt)] struct Opt { - #[structopt(long, parse(from_os_str), default_value = "narchttpd.rhai")] - config_script: PathBuf, + #[structopt(long, parse(from_os_str), default_value = "narchttpd.toml")] + config_file: PathBuf, } -fn make_engine() -> Engine { - let mut engine = Engine::new(); - engine.register_type_with_name::>>("Request"); - engine.register_type::(); - engine.register_fn( - "handle_request_serve_static", - utils::serve_static::handle_request, - ); - engine.register_fn("serve_static", utils::serve_static::serve_static); - engine.register_fn( - "handle_request_proxy_child", - utils::proxy_child::handle_request, - ); - engine.register_fn("proxy_child", utils::proxy_child::proxy_child); - engine +#[derive(Deserialize)] +#[serde(tag = "mode", rename_all = "kebab-case")] +enum DomainConfig { + Static { + root: PathBuf, + }, + + ProxyChild { + command: String, + in_dir: Option, + port: u16, + }, +} + +impl DomainConfig { + fn handler(self) -> Box { + match self { + Self::Static { root } => Box::new(utils::serve_static::Params::new(root)), + Self::ProxyChild { + command, + in_dir, + port, + } => Box::new(utils::proxy_child::ProxyChild::new(command, in_dir, port)), + } + } } -fn get_config_scope(engine: &Engine, opt: &Opt) -> Scope<'static> { - let mut ast = engine.compile_file(opt.config_script.clone()).unwrap(); - - let mut scope = Scope::new(); - scope.push("http_ports", [80]); - scope.push("https_ports", [443]); - scope.push("domains", Map::new()); - let export_ast = engine - .compile("export http_ports, https_ports, domains;") - .unwrap(); - ast.combine(export_ast); - let _: () = engine.eval_ast_with_scope(&mut scope, &ast).unwrap(); - scope +#[derive(Deserialize)] +struct Config { + http_ports: Vec, + https_ports: Vec, + #[serde(flatten)] + domains: HashMap, } #[tokio::main] async fn main() { - let opt = Arc::new(Opt::from_args()); + let opt = Opt::from_args(); - let engine = make_engine(); - let scope = get_config_scope(&engine, &opt); + let config_data = read_to_string(&opt.config_file).expect("Config file not found"); - let http_ports: rhai::Array = scope.get_value("http_ports").unwrap(); - let http_ports: Vec = http_ports - .into_iter() - .map(|x| x.as_int().unwrap() as u16) - .collect(); - let https_ports: rhai::Array = scope.get_value("https_ports").unwrap(); - let https_ports: Vec = https_ports - .into_iter() - .map(|x| x.as_int().unwrap() as u16) - .collect(); + let Config { + http_ports, + https_ports, + domains, + } = toml::from_str(&config_data).expect("Config file not valid"); assert!(https_ports.is_empty(), "HTTPS is complicated oops"); + let domains: HashMap<_, _> = domains + .into_iter() + .map(|(domain, config)| (domain, Arc::new(config.handler()))) + .collect(); + let do_response_domains = domains.clone(); + // TODO learn hyper - let do_response = move |ctx: &NativeCallContext, domains: Map, req: Request| { - for (domain, handler) in &domains { + let do_response = move |req: Request| async move { + for (domain, handler) in do_response_domains.clone() { let req_domain = req.headers().get(header::HOST).unwrap(); - if domain.as_str() == req_domain { + if &domain == req_domain { eprintln!("request {:?} matched domain {}", req, domain); // matched! - let handler: FnPtr = handler.clone_cast(); - let args = [Dynamic::from(Rc::new(req))]; - let result = handler.call_dynamic(ctx, None, args).unwrap(); - let result: Rc> = result.cast(); - return Rc::try_unwrap(result).unwrap(); + return handler.handle(req).await; } } Response::builder() @@ -96,19 +97,7 @@ async fn main() { let make_svc = make_service_fn(move |_conn| async move { Ok::<_, Infallible>(service_fn(move |req| async move { - let handle = tokio::runtime::Handle::current(); - let response = handle - .spawn_blocking(move || { - let opt = Opt::from_args(); - let engine = make_engine(); - let scope = get_config_scope(&engine, &opt); - let request_handler_context = - NativeCallContext::new(&engine, "handle_request", &[]); - let domains: Map = scope.get_value("domains").unwrap(); - do_response(&request_handler_context, domains, req) - }) - .await - .unwrap(); + let response = do_response(req).await; Ok::<_, Infallible>(response) })) }); diff --git a/src/utils.rs b/src/utils.rs index 0bd5c2e..ebc21f2 100644 --- a/src/utils.rs +++ b/src/utils.rs @@ -1,2 +1,10 @@ +use async_trait::async_trait; +use hyper::{Body, Request, Response}; + pub mod proxy_child; pub mod serve_static; + +#[async_trait] +pub trait HttpHandler: Send + Sync { + async fn handle(&self, request: Request) -> Response; +} diff --git a/src/utils/proxy_child.rs b/src/utils/proxy_child.rs index d7a021d..cc35298 100644 --- a/src/utils/proxy_child.rs +++ b/src/utils/proxy_child.rs @@ -1,9 +1,12 @@ +use std::path::PathBuf; use std::process::{Child as ChildProcess, Command}; use std::rc::Rc; +use std::sync::Arc; use hyper::http::uri::Scheme; use hyper::{header, Body, Client, Request, Response}; -use rhai::{Dynamic, FnPtr, Map}; + +use super::{async_trait, HttpHandler}; pub struct KillOnDrop(ChildProcess); @@ -15,60 +18,48 @@ impl Drop for KillOnDrop { #[derive(Clone)] pub struct ProxyChild { - process: Rc, + process: Arc, port: u16, } impl ProxyChild { - fn new(params: Map) -> Self { - let command_line = params["command"].clone().into_immutable_string().unwrap(); - let port = params["port"].as_int().unwrap(); + pub fn new(command_line: String, in_dir: Option, port: u16) -> Self { let mut command_line = command_line.split(" "); let command = command_line.next().unwrap(); let mut child = Command::new(command); child.args(command_line); - if let Some(cwd) = params.get("in_dir") { - let cwd = cwd.clone().into_immutable_string().unwrap(); - let cwd: &str = cwd.as_ref(); + if let Some(cwd) = in_dir { child.current_dir(cwd); } let child = child.spawn().unwrap(); Self { - process: Rc::new(KillOnDrop(child)), + process: Arc::new(KillOnDrop(child)), port: port as u16, } } } -pub fn handle_request(child: &mut ProxyChild, request: Rc>) -> Rc> { - let ProxyChild { port, .. } = child; - let mut request_uri = request.uri().clone().into_parts(); - // TODO ipv6 loopback? - request_uri.authority = Some(format!("127.0.0.1:{}", port).parse().unwrap()); - request_uri.scheme = Some(Scheme::HTTP); - let mut proxy_request = Request::builder() - .method(request.method()) - .uri(request_uri) - .header(header::HOST, request.headers()[header::HOST].clone()); - proxy_request.headers_mut().unwrap().extend( - request - .headers() - .iter() - .map(|(x, y)| (x.clone(), y.clone())), - ); - // TODO handle nonempty body - let proxy_request = proxy_request.body(Body::empty()).unwrap(); - let response = async { +#[async_trait] +impl HttpHandler for ProxyChild { + async fn handle(&self, request: Request) -> Response { + let ProxyChild { port, .. } = self; + let mut request_uri = request.uri().clone().into_parts(); + // TODO ipv6 loopback? + request_uri.authority = Some(format!("127.0.0.1:{}", port).parse().unwrap()); + request_uri.scheme = Some(Scheme::HTTP); + let mut proxy_request = Request::builder() + .method(request.method()) + .uri(request_uri) + .header(header::HOST, request.headers()[header::HOST].clone()); + proxy_request.headers_mut().unwrap().extend( + request + .headers() + .iter() + .map(|(x, y)| (x.clone(), y.clone())), + ); + // TODO handle nonempty body + let proxy_request = proxy_request.body(Body::empty()).unwrap(); let client = Client::new(); - Rc::new(client.request(proxy_request).await.unwrap()) - }; - let runtime = tokio::runtime::Handle::current(); - runtime.block_on(response) -} - -pub fn proxy_child(params: Map) -> FnPtr { - let child = ProxyChild::new(params); - let mut result = FnPtr::new("handle_request_proxy_child").unwrap(); - result.add_curry(Dynamic::from(child)); - result + client.request(proxy_request).await.unwrap() + } } diff --git a/src/utils/serve_static.rs b/src/utils/serve_static.rs index 2ec0a90..c087c21 100644 --- a/src/utils/serve_static.rs +++ b/src/utils/serve_static.rs @@ -1,75 +1,61 @@ 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}; + +use super::{async_trait, HttpHandler}; #[derive(Clone, Debug)] pub struct Params { root: PathBuf, } -#[derive(Debug)] -pub struct KeyError(&'static str); - -impl TryFrom for Params { - type Error = KeyError; - - fn try_from(mut value: Map) -> Result { - let root = value - .remove("root") - .and_then(|value| value.into_immutable_string().ok()) - .ok_or(KeyError("root"))?; - let root: PathBuf = root.parse().unwrap(); +impl Params { + pub fn new(root: PathBuf) -> Self { let root = root.canonicalize().unwrap(); - Ok(Self { root }) + Self { root } } } -pub fn handle_request(params: &mut Params, request: Rc>) -> Rc> { - 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(""))) +#[async_trait] +impl HttpHandler for Params { + async fn handle(&self, request: Request) -> Response { + let Params { root } = self; + 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 + }; + response.unwrap() + } } -- cgit v1.2.3