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|
use std::collections::HashMap;
use std::net::SocketAddr;
use std::sync::Arc;
use futures::future::Future;
use hyper::body::{Bytes, HttpBody};
use hyper::server::conn::AddrStream;
use hyper::service::{make_service_fn, service_fn};
use hyper::{Body, Method, Request, Response, Server};
use garage_util::error::Error;
use garage_core::garage::Garage;
use crate::http_util::*;
use crate::signature::check_signature;
use crate::s3_get::{handle_get, handle_head};
use crate::s3_list::handle_list;
use crate::s3_put::{handle_delete, handle_put};
pub type BodyType = Box<dyn HttpBody<Data = Bytes, Error = Error> + Send + Unpin>;
pub async fn run_api_server(
garage: Arc<Garage>,
shutdown_signal: impl Future<Output = ()>,
) -> Result<(), Error> {
let addr = &garage.config.s3_api.api_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<Body>| {
let garage = garage.clone();
handler(garage, req, client_addr)
}))
}
});
let server = Server::bind(&addr).serve(service);
let graceful = server.with_graceful_shutdown(shutdown_signal);
info!("API server listening on http://{}", addr);
graceful.await?;
Ok(())
}
async fn handler(
garage: Arc<Garage>,
req: Request<Body>,
addr: SocketAddr,
) -> Result<Response<BodyType>, Error> {
info!("{} {} {}", addr, req.method(), req.uri());
debug!("{:?}", req);
match handler_inner(garage, req).await {
Ok(x) => {
debug!("{} {:?}", x.status(), x.headers());
Ok(x)
}
Err(e) => {
let body: BodyType = Box::new(BytesBody::from(format!("{}\n", e)));
let mut http_error = Response::new(body);
*http_error.status_mut() = e.http_status_code();
warn!("Response: error {}, {}", e.http_status_code(), e);
Ok(http_error)
}
}
}
async fn handler_inner(
garage: Arc<Garage>,
req: Request<Body>,
) -> Result<Response<BodyType>, Error> {
let path = req.uri().path().to_string();
let path = path.trim_start_matches('/');
let (bucket, key) = match path.find('/') {
Some(i) => {
let (bucket, key) = path.split_at(i);
let key = key.trim_start_matches('/');
(bucket, Some(key))
}
None => (path, None),
};
if bucket.len() == 0 {
return Err(Error::Forbidden(format!(
"Operations on buckets not allowed"
)));
}
let api_key = check_signature(&garage, &req).await?;
let allowed = match req.method() {
&Method::HEAD | &Method::GET => api_key.allow_read(&bucket),
_ => api_key.allow_write(&bucket),
};
if !allowed {
return Err(Error::Forbidden(format!(
"Operation is not allowed for this key."
)));
}
if let Some(key) = key {
match req.method() {
&Method::HEAD => Ok(handle_head(garage, &bucket, &key).await?),
&Method::GET => Ok(handle_get(garage, &bucket, &key).await?),
&Method::PUT => {
let mime_type = req
.headers()
.get(hyper::header::CONTENT_TYPE)
.map(|x| x.to_str())
.unwrap_or(Ok("blob"))?
.to_string();
let version_uuid =
handle_put(garage, &mime_type, &bucket, &key, req.into_body()).await?;
let response = format!("{}\n", hex::encode(version_uuid,));
Ok(Response::new(Box::new(BytesBody::from(response))))
}
&Method::DELETE => {
let version_uuid = handle_delete(garage, &bucket, &key).await?;
let response = format!("{}\n", hex::encode(version_uuid,));
Ok(Response::new(Box::new(BytesBody::from(response))))
}
_ => Err(Error::BadRequest(format!("Invalid method"))),
}
} else {
match req.method() {
&Method::PUT | &Method::HEAD => {
// If PUT: corresponds to a bucket creation call
// If we're here, the bucket already exists, so just answer ok
let empty_body: BodyType = Box::new(BytesBody::from(vec![]));
let response = Response::builder()
.header("Location", format!("/{}", bucket))
.body(empty_body)
.unwrap();
Ok(response)
},
&Method::DELETE => Err(Error::Forbidden(
"Cannot delete buckets using S3 api, please talk to Garage directly"
.into(),
)),
&Method::GET => {
let mut params = HashMap::new();
if let Some(query) = req.uri().query() {
let query_pairs = url::form_urlencoded::parse(query.as_bytes());
for (key, val) in query_pairs {
params.insert(key.to_lowercase(), val.to_string());
}
}
if ["delimiter", "prefix"]
.iter()
.all(|x| params.contains_key(&x.to_string()))
{
let delimiter = params.get("delimiter").unwrap();
let max_keys = params
.get("max-keys")
.map(|x| {
x.parse::<usize>().map_err(|e| {
Error::BadRequest(format!("Invalid value for max-keys: {}", e))
})
})
.unwrap_or(Ok(1000))?;
let prefix = params.get("prefix").unwrap();
Ok(handle_list(garage, bucket, delimiter, max_keys, prefix).await?)
} else {
Err(Error::BadRequest(format!(
"Not a list call, so what is it?"
)))
}
}
_ => Err(Error::BadRequest(format!("Invalid method"))),
}
}
}
|
