use std::sync::Arc; use std::net::SocketAddr; use std::collections::VecDeque; use futures::stream::StreamExt; use hyper::service::{make_service_fn, service_fn}; use hyper::server::conn::AddrStream; use hyper::{Body, Method, Request, Response, Server, StatusCode}; use futures::future::Future; use crate::error::Error; use crate::data::*; use crate::proto::*; use crate::rpc_client::*; use crate::server::Garage; pub async fn run_api_server(garage: Arc, shutdown_signal: impl Future) -> Result<(), hyper::Error> { let addr = ([0, 0, 0, 0], garage.system.config.api_port).into(); 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| { let garage = garage.clone(); handler(garage, req, client_addr) })) } }); let server = Server::bind(&addr).serve(service); let graceful = server.with_graceful_shutdown(shutdown_signal); println!("API server listening on http://{}", addr); graceful.await } async fn handler(garage: Arc, req: Request, addr: SocketAddr) -> Result, Error> { match handler_inner(garage, req, addr).await { Ok(x) => Ok(x), Err(e) => { let mut http_error = Response::new(Body::from(format!("{}\n", e))); *http_error.status_mut() = e.http_status_code(); Ok(http_error) } } } async fn handler_inner(garage: Arc, req: Request, addr: SocketAddr) -> Result, Error> { eprintln!("{} {} {}", addr, req.method(), req.uri()); let bucket = req.headers() .get(hyper::header::HOST) .map(|x| x.to_str().map_err(Error::from)) .unwrap_or(Err(Error::BadRequest(format!("Host: header missing"))))? .to_lowercase(); let key = req.uri().path().to_string(); match req.method() { &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?; Ok(Response::new(Body::from( format!("Version UUID: {:?}", version_uuid), ))) } _ => Err(Error::BadRequest(format!("Invalid method"))), } } async fn handle_put(garage: Arc, mime_type: &str, bucket: &str, key: &str, body: Body) -> Result { let version_uuid = gen_uuid(); let mut chunker = BodyChunker::new(body, garage.system.config.block_size); let first_block = match chunker.next().await? { Some(x) => x, None => return Err(Error::BadRequest(format!("Empty body"))), }; let mut object = Object { bucket: bucket.into(), key: key.into(), versions: Vec::new(), }; object.versions.push(Box::new(Version{ uuid: version_uuid.clone(), timestamp: now_msec(), mime_type: mime_type.to_string(), size: first_block.len() as u64, is_complete: false, data: VersionData::DeleteMarker, })); if first_block.len() < INLINE_THRESHOLD { object.versions[0].data = VersionData::Inline(first_block); object.versions[0].is_complete = true; garage.object_table.insert(&object).await?; return Ok(version_uuid) } let first_block_hash = hash(&first_block[..]); object.versions[0].data = VersionData::FirstBlock(first_block_hash); garage.object_table.insert(&object).await?; let block_meta = BlockMeta{ version_uuid: version_uuid.clone(), offset: 0, hash: hash(&first_block[..]), }; let mut next_offset = first_block.len(); let mut put_curr_block = put_block(garage.clone(), block_meta, first_block); loop { let (_, next_block) = futures::try_join!(put_curr_block, chunker.next())?; if let Some(block) = next_block { let block_meta = BlockMeta{ version_uuid: version_uuid.clone(), offset: next_offset as u64, hash: hash(&block[..]), }; next_offset += block.len(); put_curr_block = put_block(garage.clone(), block_meta, block); } else { break; } } // TODO: if at any step we have an error, we should undo everything we did object.versions[0].is_complete = true; object.versions[0].size = next_offset as u64; garage.object_table.insert(&object).await?; Ok(version_uuid) } async fn put_block(garage: Arc, meta: BlockMeta, data: Vec) -> Result<(), Error> { let who = garage.system.members.read().await .walk_ring(&meta.hash, garage.system.config.meta_replication_factor); rpc_try_call_many(garage.system.clone(), &who[..], &Message::PutBlock(PutBlockMessage{ meta, data, }), (garage.system.config.meta_replication_factor+1)/2, DEFAULT_TIMEOUT).await?; Ok(()) } struct BodyChunker { body: Body, block_size: usize, buf: VecDeque, } impl BodyChunker { fn new(body: Body, block_size: usize) -> Self { Self{ body, block_size, buf: VecDeque::new(), } } async fn next(&mut self) -> Result>, Error> { while self.buf.len() < self.block_size { if let Some(block) = self.body.next().await { let bytes = block?; self.buf.extend(&bytes[..]); } else { break; } } if self.buf.len() == 0 { Ok(None) } else if self.buf.len() <= self.block_size { let block = self.buf.drain(..) .collect::>(); Ok(Some(block)) } else { let block = self.buf.drain(..self.block_size) .collect::>(); Ok(Some(block)) } } } async fn handle_get(garage: Arc, bucket: &str, key: &str) -> Result, Error> { let mut object = match garage.object_table.get(&bucket.to_string(), &key.to_string()).await? { None => return Err(Error::NotFound), Some(o) => o }; let last_v = match object.versions.drain(..) .rev().filter(|v| v.is_complete) .next() { Some(v) => v, None => return Err(Error::NotFound), }; let resp_builder = Response::builder() .header("Content-Type", last_v.mime_type) .status(StatusCode::OK); match last_v.data { VersionData::DeleteMarker => Err(Error::NotFound), VersionData::Inline(bytes) => { Ok(resp_builder.body(bytes.into())?) } VersionData::FirstBlock(hash) => { // TODO unimplemented!() } } }