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authorAlex Auvolat <alex@adnab.me>2020-04-23 17:05:46 +0000
committerAlex Auvolat <alex@adnab.me>2020-04-23 17:05:46 +0000
commitc9c6b0dbd41e20d19b91c6615c46da6f45925bca (patch)
treebd299a3c5fbbd567250f6314462bc0998555589a /src/api_server.rs
parent01a8acdeecfcacafb61809f9e135709148e842ce (diff)
downloadgarage-c9c6b0dbd41e20d19b91c6615c46da6f45925bca.tar.gz
garage-c9c6b0dbd41e20d19b91c6615c46da6f45925bca.zip
Reorganize code
Diffstat (limited to 'src/api_server.rs')
-rw-r--r--src/api_server.rs358
1 files changed, 0 insertions, 358 deletions
diff --git a/src/api_server.rs b/src/api_server.rs
deleted file mode 100644
index f4bb4177..00000000
--- a/src/api_server.rs
+++ /dev/null
@@ -1,358 +0,0 @@
-use std::collections::VecDeque;
-use std::net::SocketAddr;
-use std::sync::Arc;
-
-use futures::future::Future;
-use futures::stream::*;
-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, StatusCode};
-
-use crate::data::*;
-use crate::error::Error;
-use crate::http_util::*;
-use crate::table::EmptyKey;
-
-use crate::block::INLINE_THRESHOLD;
-use crate::block_ref_table::*;
-use crate::object_table::*;
-use crate::server::Garage;
-use crate::version_table::*;
-
-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.system.config.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> {
- match handler_inner(garage, req, addr).await {
- Ok(x) => 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();
- Ok(http_error)
- }
- }
-}
-
-async fn handler_inner(
- garage: Arc<Garage>,
- req: Request<Body>,
- addr: SocketAddr,
-) -> Result<Response<BodyType>, Error> {
- info!("{} {} {}", 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?;
- 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"))),
- }
-}
-
-async fn handle_put(
- garage: Arc<Garage>,
- mime_type: &str,
- bucket: &str,
- key: &str,
- body: Body,
-) -> Result<UUID, Error> {
- 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(ObjectVersion {
- uuid: version_uuid,
- timestamp: now_msec(),
- mime_type: mime_type.to_string(),
- size: first_block.len() as u64,
- is_complete: false,
- data: ObjectVersionData::DeleteMarker,
- }));
-
- if first_block.len() < INLINE_THRESHOLD {
- object.versions[0].data = ObjectVersionData::Inline(first_block);
- object.versions[0].is_complete = true;
- garage.object_table.insert(&object).await?;
- return Ok(version_uuid);
- }
-
- let version = Version {
- uuid: version_uuid,
- deleted: false,
- blocks: Vec::new(),
- bucket: bucket.into(),
- key: key.into(),
- };
-
- let first_block_hash = hash(&first_block[..]);
- object.versions[0].data = ObjectVersionData::FirstBlock(first_block_hash);
- garage.object_table.insert(&object).await?;
-
- let mut next_offset = first_block.len();
- let mut put_curr_version_block = put_block_meta(garage.clone(), &version, 0, first_block_hash);
- let mut put_curr_block = garage
- .block_manager
- .rpc_put_block(first_block_hash, first_block);
-
- loop {
- let (_, _, next_block) =
- futures::try_join!(put_curr_block, put_curr_version_block, chunker.next())?;
- if let Some(block) = next_block {
- let block_hash = hash(&block[..]);
- let block_len = block.len();
- put_curr_version_block =
- put_block_meta(garage.clone(), &version, next_offset as u64, block_hash);
- put_curr_block = garage.block_manager.rpc_put_block(block_hash, block);
- next_offset += block_len;
- } 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_meta(
- garage: Arc<Garage>,
- version: &Version,
- offset: u64,
- hash: Hash,
-) -> Result<(), Error> {
- let mut version = version.clone();
- version.blocks.push(VersionBlock { offset, hash: hash });
-
- let block_ref = BlockRef {
- block: hash,
- version: version.uuid,
- deleted: false,
- };
-
- futures::try_join!(
- garage.version_table.insert(&version),
- garage.block_ref_table.insert(&block_ref),
- )?;
- Ok(())
-}
-
-struct BodyChunker {
- body: Body,
- read_all: bool,
- block_size: usize,
- buf: VecDeque<u8>,
-}
-
-impl BodyChunker {
- fn new(body: Body, block_size: usize) -> Self {
- Self {
- body,
- read_all: false,
- block_size,
- buf: VecDeque::new(),
- }
- }
- async fn next(&mut self) -> Result<Option<Vec<u8>>, Error> {
- while !self.read_all && self.buf.len() < self.block_size {
- if let Some(block) = self.body.next().await {
- let bytes = block?;
- trace!("Body next: {} bytes", bytes.len());
- self.buf.extend(&bytes[..]);
- } else {
- self.read_all = true;
- }
- }
- if self.buf.len() == 0 {
- Ok(None)
- } else if self.buf.len() <= self.block_size {
- let block = self.buf.drain(..).collect::<Vec<u8>>();
- Ok(Some(block))
- } else {
- let block = self.buf.drain(..self.block_size).collect::<Vec<u8>>();
- Ok(Some(block))
- }
- }
-}
-
-async fn handle_delete(garage: Arc<Garage>, bucket: &str, key: &str) -> Result<UUID, Error> {
- let exists = match garage
- .object_table
- .get(&bucket.to_string(), &key.to_string())
- .await?
- {
- None => false,
- Some(o) => {
- let mut has_active_version = false;
- for v in o.versions.iter() {
- if v.data != ObjectVersionData::DeleteMarker {
- has_active_version = true;
- break;
- }
- }
- has_active_version
- }
- };
-
- if !exists {
- // No need to delete
- return Ok([0u8; 32].into());
- }
-
- let version_uuid = gen_uuid();
-
- let mut object = Object {
- bucket: bucket.into(),
- key: key.into(),
- versions: Vec::new(),
- };
- object.versions.push(Box::new(ObjectVersion {
- uuid: version_uuid,
- timestamp: now_msec(),
- mime_type: "application/x-delete-marker".into(),
- size: 0,
- is_complete: true,
- data: ObjectVersionData::DeleteMarker,
- }));
-
- garage.object_table.insert(&object).await?;
- return Ok(version_uuid);
-}
-
-async fn handle_get(
- garage: Arc<Garage>,
- bucket: &str,
- key: &str,
-) -> Result<Response<BodyType>, 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 {
- ObjectVersionData::DeleteMarker => Err(Error::NotFound),
- ObjectVersionData::Inline(bytes) => {
- let body: BodyType = Box::new(BytesBody::from(bytes));
- Ok(resp_builder.body(body)?)
- }
- ObjectVersionData::FirstBlock(first_block_hash) => {
- let read_first_block = garage.block_manager.rpc_get_block(&first_block_hash);
- let get_next_blocks = garage.version_table.get(&last_v.uuid, &EmptyKey);
-
- let (first_block, version) = futures::try_join!(read_first_block, get_next_blocks)?;
- let version = match version {
- Some(v) => v,
- None => return Err(Error::NotFound),
- };
-
- let mut blocks = version
- .blocks
- .iter()
- .map(|vb| (vb.hash, None))
- .collect::<Vec<_>>();
- blocks[0].1 = Some(first_block);
-
- let body_stream = futures::stream::iter(blocks)
- .map(move |(hash, data_opt)| {
- let garage = garage.clone();
- async move {
- if let Some(data) = data_opt {
- Ok(Bytes::from(data))
- } else {
- garage
- .block_manager
- .rpc_get_block(&hash)
- .await
- .map(Bytes::from)
- }
- }
- })
- .buffered(2);
- let body: BodyType = Box::new(StreamBody::new(Box::pin(body_stream)));
- Ok(resp_builder.body(body)?)
- }
- }
-}
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