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