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use std::collections::HashMap;
use std::convert::Infallible;
use std::fs;
use std::net::{Ipv4Addr, SocketAddr};
use std::path::PathBuf;
use std::sync::Arc;
use hyper::service::{make_service_fn, service_fn};
use hyper::{header, Body, Request, Response, Server, StatusCode};
use miette::IntoDiagnostic;
use structopt::StructOpt;
mod utils;
use utils::HttpHandler;
#[derive(Debug, StructOpt)]
struct Opt {
#[structopt(long, parse(from_os_str), default_value = "narchttpd.kdl")]
config_file: PathBuf,
}
#[derive(Debug, knuffel::Decode)]
struct HttpConfig {
#[knuffel(argument)]
enabled: bool,
#[knuffel(property(name = "port"))]
port: u16,
}
#[derive(Debug, knuffel::Decode)]
struct StaticDomain {
#[knuffel(child, unwrap(argument))]
root: PathBuf,
}
impl StaticDomain {
fn handler(self) -> Box<dyn HttpHandler> {
let Self { root } = self;
Box::new(utils::serve_static::Params::new(root))
}
}
#[derive(Debug, knuffel::Decode)]
struct ProxyChildDomain {
#[knuffel(child, unwrap(argument))]
command: String,
#[knuffel(child, unwrap(argument))]
in_dir: Option<PathBuf>,
#[knuffel(child, unwrap(argument))]
port: u16,
}
impl ProxyChildDomain {
fn handler(self) -> Box<dyn HttpHandler> {
let Self {
command,
in_dir,
port,
} = self;
Box::new(utils::proxy_child::ProxyChild::new(command, in_dir, port))
}
}
#[derive(Debug, knuffel::Decode)]
enum DomainType {
Static(StaticDomain),
ProxyChild(ProxyChildDomain),
}
impl DomainType {
fn handler(self) -> Box<dyn HttpHandler> {
match self {
Self::Static(domain) => domain.handler(),
Self::ProxyChild(domain) => domain.handler(),
}
}
}
#[derive(Debug, knuffel::Decode)]
struct DomainConfig {
#[knuffel(arguments)]
domains: Vec<String>,
#[knuffel(children)]
config: Vec<DomainType>,
}
#[derive(Debug, knuffel::Decode)]
struct Config {
#[knuffel(child)]
http: HttpConfig,
#[knuffel(children(name = "domain"))]
domains: Vec<DomainConfig>,
}
#[tokio::main]
async fn main() -> miette::Result<()> {
let opt: Opt = Opt::from_args();
let config_data = fs::read_to_string(&opt.config_file).into_diagnostic()?;
let Config { http, domains } =
knuffel::parse(&opt.config_file.to_string_lossy(), &config_data)?;
let http_port = http.port;
let domains: HashMap<_, _> = domains
.into_iter()
.map(|DomainConfig { domains, config }| {
let [config]: [DomainType; 1] = config.try_into().unwrap();
(domains, Arc::new(config.handler()))
})
.flat_map(|(domains, handler)| {
domains
.into_iter()
.map(move |domain| (domain, Arc::clone(&handler)))
})
.collect();
let domains = Arc::new(domains);
// TODO learn hyper
let addr = SocketAddr::new(Ipv4Addr::LOCALHOST.into(), http_port);
let make_svc = make_service_fn(move |_conn| {
let domains = domains.clone();
async move {
let domains = domains.clone();
Ok::<_, Infallible>(service_fn(move |req: Request<Body>| {
let domains = domains.clone();
async move {
let domains = domains.clone();
let req_domain = req.headers().get(header::HOST).unwrap();
let req_domain = req_domain.to_str().unwrap();
match domains.get(req_domain) {
Some(handler) => {
eprintln!("request {:?} matched domain {}", req, req_domain);
Ok::<_, Infallible>(handler.handle(req).await)
}
None => Ok::<_, Infallible>(
Response::builder()
.status(StatusCode::NOT_FOUND)
.body(Body::from("Not Found"))
.unwrap(),
),
}
}
}))
}
});
let server = Server::bind(&addr).serve(make_svc);
server.await.into_diagnostic()
}
|
