305 lines
8.4 KiB
Rust
305 lines
8.4 KiB
Rust
use std::collections::HashMap;
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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::server::conn::AddrStream;
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use hyper::service::{make_service_fn, service_fn};
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use hyper::{Body, Method, Request, Response, Server};
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use garage_util::error::Error as GarageError;
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use garage_model::garage::Garage;
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use crate::error::*;
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use crate::signature::check_signature;
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use crate::s3_bucket::*;
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use crate::s3_copy::*;
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use crate::s3_delete::*;
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use crate::s3_get::*;
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use crate::s3_list::*;
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use crate::s3_put::*;
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/// Run the S3 API server
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pub async fn run_api_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_api.api_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::<_, GarageError>(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!("API 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>, GarageError> {
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let uri = req.uri().clone();
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info!("{} {} {}", addr, req.method(), uri);
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debug!("{:?}", req);
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match handler_inner(garage.clone(), req).await {
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Ok(x) => {
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debug!("{} {:?}", x.status(), x.headers());
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Ok(x)
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}
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Err(e) => {
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let body: Body = Body::from(e.aws_xml(&garage.config.s3_api.s3_region, uri.path()));
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let http_error = Response::builder()
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.status(e.http_status_code())
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.header("Content-Type", "application/xml")
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.body(body)?;
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if e.http_status_code().is_server_error() {
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warn!("Response: error {}, {}", e.http_status_code(), e);
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} else {
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info!("Response: error {}, {}", e.http_status_code(), e);
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}
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Ok(http_error)
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}
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}
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}
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async fn handler_inner(garage: Arc<Garage>, req: Request<Body>) -> Result<Response<Body>, Error> {
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let path = req.uri().path().to_string();
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let path = percent_encoding::percent_decode_str(&path).decode_utf8()?;
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let (api_key, content_sha256) = check_signature(&garage, &req).await?;
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if path == "/" {
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return handle_list_buckets(&api_key);
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}
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let (bucket, key) = parse_bucket_key(&path)?;
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let allowed = match req.method() {
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&Method::HEAD | &Method::GET => api_key.allow_read(&bucket),
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_ => api_key.allow_write(&bucket),
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};
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if !allowed {
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return Err(Error::Forbidden(format!(
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"Operation is not allowed for this key."
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)));
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}
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let mut params = HashMap::new();
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if let Some(query) = req.uri().query() {
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let query_pairs = url::form_urlencoded::parse(query.as_bytes());
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for (key, val) in query_pairs {
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params.insert(key.to_lowercase(), val.to_string());
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}
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}
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if let Some(key) = key {
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match req.method() {
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&Method::HEAD => {
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// HeadObject query
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Ok(handle_head(garage, &req, &bucket, &key).await?)
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}
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&Method::GET => {
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// GetObject query
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Ok(handle_get(garage, &req, &bucket, &key).await?)
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}
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&Method::PUT => {
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if params.contains_key(&"partnumber".to_string())
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&& params.contains_key(&"uploadid".to_string())
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{
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// UploadPart query
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let part_number = params.get("partnumber").unwrap();
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let upload_id = params.get("uploadid").unwrap();
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Ok(handle_put_part(
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garage,
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req,
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&bucket,
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&key,
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part_number,
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upload_id,
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content_sha256,
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)
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.await?)
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} else if req.headers().contains_key("x-amz-copy-source") {
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// CopyObject query
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let copy_source = req.headers().get("x-amz-copy-source").unwrap().to_str()?;
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let copy_source =
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percent_encoding::percent_decode_str(©_source).decode_utf8()?;
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let (source_bucket, source_key) = parse_bucket_key(©_source)?;
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if !api_key.allow_read(&source_bucket) {
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return Err(Error::Forbidden(format!(
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"Reading from bucket {} not allowed for this key",
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source_bucket
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)));
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}
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let source_key = source_key.ok_or_bad_request("No source key specified")?;
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Ok(
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handle_copy(garage, &req, &bucket, &key, &source_bucket, &source_key)
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.await?,
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)
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} else {
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// PutObject query
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Ok(handle_put(garage, req, &bucket, &key, content_sha256).await?)
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}
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}
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&Method::DELETE => {
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if params.contains_key(&"uploadid".to_string()) {
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// AbortMultipartUpload query
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let upload_id = params.get("uploadid").unwrap();
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Ok(handle_abort_multipart_upload(garage, &bucket, &key, upload_id).await?)
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} else {
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// DeleteObject query
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Ok(handle_delete(garage, &bucket, &key).await?)
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}
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}
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&Method::POST => {
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if params.contains_key(&"uploads".to_string()) {
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// CreateMultipartUpload call
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Ok(handle_create_multipart_upload(garage, &req, &bucket, &key).await?)
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} else if params.contains_key(&"uploadid".to_string()) {
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// CompleteMultipartUpload call
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let upload_id = params.get("uploadid").unwrap();
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Ok(handle_complete_multipart_upload(
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garage,
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req,
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&bucket,
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&key,
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upload_id,
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content_sha256,
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)
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.await?)
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} else {
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Err(Error::BadRequest(format!(
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"Not a CreateMultipartUpload call, what is it?"
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)))
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}
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}
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_ => Err(Error::BadRequest(format!("Invalid method"))),
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}
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} else {
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match req.method() {
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&Method::PUT => {
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// CreateBucket
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// If we're here, the bucket already exists, so just answer ok
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debug!(
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"Body: {}",
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std::str::from_utf8(&hyper::body::to_bytes(req.into_body()).await?)
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.unwrap_or("<invalid utf8>")
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);
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let empty_body: Body = Body::from(vec![]);
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let response = Response::builder()
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.header("Location", format!("/{}", bucket))
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.body(empty_body)
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.unwrap();
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Ok(response)
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}
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&Method::HEAD => {
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// HeadBucket
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let empty_body: Body = Body::from(vec![]);
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let response = Response::builder().body(empty_body).unwrap();
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Ok(response)
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}
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&Method::DELETE => {
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// DeleteBucket query
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Err(Error::Forbidden(
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"Cannot delete buckets using S3 api, please talk to Garage directly".into(),
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))
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}
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&Method::GET => {
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if params.contains_key("location") {
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// GetBucketLocation call
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Ok(handle_get_bucket_location(garage)?)
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} else {
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// ListObjects or ListObjectsV2 query
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let q = parse_list_objects_query(bucket, ¶ms)?;
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Ok(handle_list(garage, &q).await?)
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}
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}
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&Method::POST => {
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if params.contains_key(&"delete".to_string()) {
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// DeleteObjects
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Ok(handle_delete_objects(garage, bucket, req, content_sha256).await?)
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} else {
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debug!(
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"Body: {}",
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std::str::from_utf8(&hyper::body::to_bytes(req.into_body()).await?)
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.unwrap_or("<invalid utf8>")
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);
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Err(Error::BadRequest(format!("Unsupported call")))
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}
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}
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_ => Err(Error::BadRequest(format!("Invalid method"))),
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}
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}
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}
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/// Extract the bucket name and the key name from an HTTP path
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///
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/// S3 internally manages only buckets and keys. This function splits
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/// an HTTP path to get the corresponding bucket name and key.
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fn parse_bucket_key(path: &str) -> Result<(&str, Option<&str>), Error> {
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let path = path.trim_start_matches('/');
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let (bucket, key) = match path.find('/') {
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Some(i) => {
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let key = &path[i + 1..];
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if key.len() > 0 {
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(&path[..i], Some(key))
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} else {
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(&path[..i], None)
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}
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}
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None => (path, None),
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};
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if bucket.len() == 0 {
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return Err(Error::BadRequest(format!("No bucket specified")));
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}
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Ok((bucket, key))
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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 parse_bucket_containing_a_key() -> Result<(), Error> {
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let (bucket, key) = parse_bucket_key("/my_bucket/a/super/file.jpg")?;
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assert_eq!(bucket, "my_bucket");
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assert_eq!(key.expect("key must be set"), "a/super/file.jpg");
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Ok(())
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}
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#[test]
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fn parse_bucket_containing_no_key() -> Result<(), Error> {
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let (bucket, key) = parse_bucket_key("/my_bucket/")?;
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assert_eq!(bucket, "my_bucket");
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assert!(key.is_none());
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let (bucket, key) = parse_bucket_key("/my_bucket")?;
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assert_eq!(bucket, "my_bucket");
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assert!(key.is_none());
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Ok(())
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}
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#[test]
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fn parse_bucket_containing_no_bucket() {
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let parsed = parse_bucket_key("");
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assert!(parsed.is_err());
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let parsed = parse_bucket_key("/");
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assert!(parsed.is_err());
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let parsed = parse_bucket_key("////");
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assert!(parsed.is_err());
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}
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}
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