use std::{borrow::Cow, convert::Infallible, net::SocketAddr, sync::Arc}; use futures::future::Future; use hyper::{ header::HOST, server::conn::AddrStream, service::{make_service_fn, service_fn}, Body, Method, Request, Response, Server, }; use crate::error::*; use garage_api::helpers::{authority_to_host, host_to_bucket}; use garage_api::s3_get::{handle_get, handle_head}; use garage_model::bucket_table::*; use garage_model::garage::Garage; use garage_table::*; use garage_util::error::Error as GarageError; /// Run a web server pub async fn run_web_server( garage: Arc, shutdown_signal: impl Future, ) -> Result<(), GarageError> { let addr = &garage.config.s3_web.bind_addr; let service = make_service_fn(|conn: &AddrStream| { let garage = garage.clone(); let client_addr = conn.remote_addr(); async move { Ok::<_, Error>(service_fn(move |req: Request| { let garage = garage.clone(); handle_request(garage, req, client_addr) })) } }); let server = Server::bind(addr).serve(service); let graceful = server.with_graceful_shutdown(shutdown_signal); info!("Web server listening on http://{}", addr); graceful.await?; Ok(()) } async fn handle_request( garage: Arc, req: Request, addr: SocketAddr, ) -> Result, Infallible> { info!("{} {} {}", addr, req.method(), req.uri()); let res = serve_file(garage, req).await; match &res { Ok(r) => debug!("{} {:?}", r.status(), r.headers()), Err(e) => warn!("Response: error {}, {}", e.http_status_code(), e), } Ok(res.unwrap_or_else(error_to_res)) } fn error_to_res(e: Error) -> Response { let body: Body = Body::from(format!("{}\n", e)); let mut http_error = Response::new(body); *http_error.status_mut() = e.http_status_code(); e.add_headers(http_error.headers_mut()); http_error } async fn serve_file(garage: Arc, req: Request) -> Result, Error> { // Get http authority string (eg. [::1]:3902 or garage.tld:80) let authority = req .headers() .get(HOST) .ok_or_else(|| Error::BadRequest("HOST header required".to_owned()))? .to_str()?; // Get bucket let host = authority_to_host(authority)?; let root = &garage.config.s3_web.root_domain; let bucket = host_to_bucket(&host, root).unwrap_or(&host); // Check bucket is exposed as a website let bucket_desc = garage .bucket_table .get(&EmptyKey, &bucket.to_string()) .await? .filter(|b| !b.is_deleted()) .ok_or(Error::NotFound)?; match bucket_desc.state.get() { BucketState::Present(params) if *params.website.get() => Ok(()), _ => Err(Error::NotFound), }?; // Get path let path = req.uri().path().to_string(); let index = &garage.config.s3_web.index; let key = path_to_key(&path, index)?; info!("Selected bucket: \"{}\", selected key: \"{}\"", bucket, key); let res = match *req.method() { Method::HEAD => handle_head(garage, &req, bucket, &key).await?, Method::GET => handle_get(garage, &req, bucket, &key).await?, _ => return Err(Error::BadRequest("HTTP method not supported".to_string())), }; Ok(res) } /// Path to key /// /// Convert the provided path to the internal key /// When a path ends with "/", we append the index name to match traditional web server behavior /// which is also AWS S3 behavior. fn path_to_key<'a>(path: &'a str, index: &str) -> Result, Error> { let path_utf8 = percent_encoding::percent_decode_str(path).decode_utf8()?; if !path_utf8.starts_with('/') { return Err(Error::BadRequest( "Path must start with a / (slash)".to_string(), )); } match path_utf8.chars().last() { None => unreachable!(), Some('/') => { let mut key = String::with_capacity(path_utf8.len() + index.len()); key.push_str(&path_utf8[1..]); key.push_str(index); Ok(key.into()) } Some(_) => match path_utf8 { Cow::Borrowed(pu8) => Ok((&pu8[1..]).into()), Cow::Owned(pu8) => Ok((&pu8[1..]).to_string().into()), }, } } #[cfg(test)] mod tests { use super::*; #[test] fn path_to_key_test() -> Result<(), Error> { assert_eq!(path_to_key("/file%20.jpg", "index.html")?, "file .jpg"); assert_eq!(path_to_key("/%20t/", "index.html")?, " t/index.html"); assert_eq!(path_to_key("/", "index.html")?, "index.html"); assert_eq!(path_to_key("/hello", "index.html")?, "hello"); assert!(path_to_key("", "index.html").is_err()); assert!(path_to_key("i/am/relative", "index.html").is_err()); Ok(()) } }