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use std::collections::HashMap;
use std::net::SocketAddr;
use std::sync::Arc;
use futures::future::Future;
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 as GarageError;
use garage_model::garage::Garage;
use crate::error::*;
use crate::signature::check_signature;
use crate::s3_copy::*;
use crate::s3_delete::*;
use crate::s3_get::*;
use crate::s3_list::*;
use crate::s3_put::*;
/// Run the S3 API server
pub async fn run_api_server(
garage: Arc<Garage>,
shutdown_signal: impl Future<Output = ()>,
) -> Result<(), GarageError> {
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::<_, GarageError>(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<Body>, GarageError> {
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: Body = Body::from(format!("{}\n", e));
let mut http_error = Response::new(body);
*http_error.status_mut() = e.http_status_code();
if e.http_status_code().is_server_error() {
warn!("Response: error {}, {}", e.http_status_code(), e);
} else {
info!("Response: error {}, {}", e.http_status_code(), e);
}
Ok(http_error)
}
}
}
async fn handler_inner(garage: Arc<Garage>, req: Request<Body>) -> Result<Response<Body>, Error> {
let path = req.uri().path().to_string();
let path = percent_encoding::percent_decode_str(&path).decode_utf8()?;
let (bucket, key) = parse_bucket_key(&path)?;
let (api_key, content_sha256) = 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."
)));
}
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 let Some(key) = key {
match req.method() {
&Method::HEAD => {
// HeadObject query
Ok(handle_head(garage, &req, &bucket, &key).await?)
}
&Method::GET => {
// GetObject query
Ok(handle_get(garage, &req, &bucket, &key).await?)
}
&Method::PUT => {
if params.contains_key(&"partnumber".to_string())
&& params.contains_key(&"uploadid".to_string())
{
// UploadPart query
let part_number = params.get("partnumber").unwrap();
let upload_id = params.get("uploadid").unwrap();
Ok(handle_put_part(
garage,
req,
&bucket,
&key,
part_number,
upload_id,
content_sha256,
)
.await?)
} else if req.headers().contains_key("x-amz-copy-source") {
// CopyObject query
let copy_source = req.headers().get("x-amz-copy-source").unwrap().to_str()?;
let copy_source =
percent_encoding::percent_decode_str(©_source).decode_utf8()?;
let (source_bucket, source_key) = parse_bucket_key(©_source)?;
if !api_key.allow_read(&source_bucket) {
return Err(Error::Forbidden(format!(
"Reading from bucket {} not allowed for this key",
source_bucket
)));
}
let source_key = source_key.ok_or_bad_request("No source key specified")?;
Ok(
handle_copy(garage, &req, &bucket, &key, &source_bucket, &source_key)
.await?,
)
} else {
// PutObject query
Ok(handle_put(garage, req, &bucket, &key, content_sha256).await?)
}
}
&Method::DELETE => {
if params.contains_key(&"uploadid".to_string()) {
// AbortMultipartUpload query
let upload_id = params.get("uploadid").unwrap();
Ok(handle_abort_multipart_upload(garage, &bucket, &key, upload_id).await?)
} else {
// DeleteObject query
Ok(handle_delete(garage, &bucket, &key).await?)
}
}
&Method::POST => {
if params.contains_key(&"uploads".to_string()) {
// CreateMultipartUpload call
Ok(handle_create_multipart_upload(garage, &req, &bucket, &key).await?)
} else if params.contains_key(&"uploadid".to_string()) {
// CompleteMultipartUpload call
let upload_id = params.get("uploadid").unwrap();
Ok(handle_complete_multipart_upload(
garage,
req,
&bucket,
&key,
upload_id,
content_sha256,
)
.await?)
} else {
Err(Error::BadRequest(format!(
"Not a CreateMultipartUpload call, what is it?"
)))
}
}
_ => Err(Error::BadRequest(format!("Invalid method"))),
}
} else {
match req.method() {
&Method::PUT => {
// CreateBucket
// If we're here, the bucket already exists, so just answer ok
debug!(
"Body: {}",
std::str::from_utf8(&hyper::body::to_bytes(req.into_body()).await?)
.unwrap_or("<invalid utf8>")
);
let empty_body: Body = Body::from(vec![]);
let response = Response::builder()
.header("Location", format!("/{}", bucket))
.body(empty_body)
.unwrap();
Ok(response)
}
&Method::HEAD => {
// HeadBucket
let empty_body: Body = Body::from(vec![]);
let response = Response::builder().body(empty_body).unwrap();
Ok(response)
}
&Method::DELETE => {
// DeleteBucket query
Err(Error::Forbidden(
"Cannot delete buckets using S3 api, please talk to Garage directly".into(),
))
}
&Method::GET => {
// ListObjects or ListObjectsV2 query
let q = parse_list_objects_query(bucket, ¶ms)?;
Ok(handle_list(garage, &q).await?)
}
&Method::POST => {
if params.contains_key(&"delete".to_string()) {
// DeleteObjects
Ok(handle_delete_objects(garage, bucket, req, content_sha256).await?)
} else {
debug!(
"Body: {}",
std::str::from_utf8(&hyper::body::to_bytes(req.into_body()).await?)
.unwrap_or("<invalid utf8>")
);
Err(Error::BadRequest(format!("Unsupported call")))
}
}
_ => Err(Error::BadRequest(format!("Invalid method"))),
}
}
}
/// Extract the bucket name and the key name from an HTTP path
///
/// S3 internally manages only buckets and keys. This function splits
/// an HTTP path to get the corresponding bucket name and key.
fn parse_bucket_key(path: &str) -> Result<(&str, Option<&str>), Error> {
let path = path.trim_start_matches('/');
let (bucket, key) = match path.find('/') {
Some(i) => {
let key = &path[i + 1..];
if key.len() > 0 {
(&path[..i], Some(key))
} else {
(&path[..i], None)
}
}
None => (path, None),
};
if bucket.len() == 0 {
return Err(Error::BadRequest(format!("No bucket specified")));
}
Ok((bucket, key))
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn parse_bucket_containing_a_key() -> Result<(), Error> {
let (bucket, key) = parse_bucket_key("/my_bucket/a/super/file.jpg")?;
assert_eq!(bucket, "my_bucket");
assert_eq!(key.expect("key must be set"), "a/super/file.jpg");
Ok(())
}
#[test]
fn parse_bucket_containing_no_key() -> Result<(), Error> {
let (bucket, key) = parse_bucket_key("/my_bucket/")?;
assert_eq!(bucket, "my_bucket");
assert!(key.is_none());
let (bucket, key) = parse_bucket_key("/my_bucket")?;
assert_eq!(bucket, "my_bucket");
assert!(key.is_none());
Ok(())
}
#[test]
fn parse_bucket_containing_no_bucket() {
let parsed = parse_bucket_key("");
assert!(parsed.is_err());
let parsed = parse_bucket_key("/");
assert!(parsed.is_err());
let parsed = parse_bucket_key("////");
assert!(parsed.is_err());
}
}
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