forked from Deuxfleurs/garage
174 lines
4.6 KiB
Rust
174 lines
4.6 KiB
Rust
use std::net::SocketAddr;
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use std::sync::Arc;
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use futures::future::Future;
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use hyper::header::HOST;
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use hyper::server::conn::AddrStream;
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use hyper::service::{make_service_fn, service_fn};
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use hyper::{Body, Request, Response, Server};
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use garage_model::garage::Garage;
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use garage_util::error::Error;
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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<(), Error> {
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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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handler(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 handler(
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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>, 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(Error::BadRequest(format!("HOST header required")))?
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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);
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// Get path
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let path = req.uri().path().to_string();
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let key = percent_encoding::percent_decode_str(&path).decode_utf8()?;
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// Get bucket descriptor
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let object = garage
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.object_table
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.get(&bucket.to_string(), &key.to_string())
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.await?
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.ok_or(Error::NotFound)?;
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info!("Selected bucket: \"{}\", selected key: \"{}\"", bucket, key);
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Ok(Response::new(Body::from("hello world\n")))
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}
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/// Extract host from the authority section given by the HTTP host header
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///
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/// The HTTP host contains both a host and a port.
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/// Extracting the port is more complex than just finding the colon (:) symbol due to IPv6
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/// We do not use the collect pattern as there is no way in std rust to collect over a stack allocated value
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/// check here: https://docs.rs/collect_slice/1.2.0/collect_slice/
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fn authority_to_host(authority: &str) -> Result<&str, Error> {
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let mut iter = authority.chars().enumerate();
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let (_, first_char) = iter
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.next()
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.ok_or(Error::BadRequest(format!("Authority is empty")))?;
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let split = match first_char {
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'[' => {
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let mut iter = iter.skip_while(|(_, c)| c != &']');
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iter.next().expect("Authority parsing logic error");
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iter.next()
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}
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_ => iter.skip_while(|(_, c)| c != &':').next(),
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};
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match split {
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Some((i, ':')) => Ok(&authority[..i]),
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None => Ok(authority),
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Some((_, _)) => Err(Error::BadRequest(format!(
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"Authority {} has an illegal format",
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authority
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))),
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}
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}
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/// Host to bucket
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///
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/// Convert a host, like "bucket.garage-site.tld" or "john.doe.com"
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/// to the corresponding bucket, resp. "bucket" and "john.doe.com"
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/// considering that ".garage-site.tld" is the "root domain".
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/// This behavior has been chosen to follow AWS S3 semantic.
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fn host_to_bucket<'a>(host: &'a str, root: &str) -> &'a str {
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if root.len() >= host.len() || !host.ends_with(root) {
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return host;
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}
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let len_diff = host.len() - root.len();
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let missing_starting_dot = root.chars().next() != Some('.');
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let cursor = if missing_starting_dot {
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len_diff - 1
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} else {
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len_diff
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};
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&host[..cursor]
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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 authority_to_host_with_port() -> Result<(), Error> {
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let domain = authority_to_host("[::1]:3902")?;
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assert_eq!(domain, "[::1]");
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let domain2 = authority_to_host("garage.tld:65200")?;
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assert_eq!(domain2, "garage.tld");
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let domain3 = authority_to_host("127.0.0.1:80")?;
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assert_eq!(domain3, "127.0.0.1");
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Ok(())
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}
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#[test]
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fn authority_to_host_without_port() -> Result<(), Error> {
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let domain = authority_to_host("[::1]")?;
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assert_eq!(domain, "[::1]");
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let domain2 = authority_to_host("garage.tld")?;
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assert_eq!(domain2, "garage.tld");
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let domain3 = authority_to_host("127.0.0.1")?;
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assert_eq!(domain3, "127.0.0.1");
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Ok(())
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}
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#[test]
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fn host_to_bucket_test() {
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assert_eq!(
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host_to_bucket("john.doe.garage.tld", ".garage.tld"),
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"john.doe"
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);
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assert_eq!(
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host_to_bucket("john.doe.garage.tld", "garage.tld"),
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"john.doe"
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);
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assert_eq!(host_to_bucket("john.doe.com", "garage.tld"), "john.doe.com");
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assert_eq!(
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host_to_bucket("john.doe.com", ".garage.tld"),
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"john.doe.com"
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);
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assert_eq!(host_to_bucket("garage.tld", "garage.tld"), "garage.tld");
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assert_eq!(host_to_bucket("garage.tld", ".garage.tld"), "garage.tld");
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}
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}
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