forked from Deuxfleurs/garage
345 lines
8.5 KiB
Rust
345 lines
8.5 KiB
Rust
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?;
|
|
Ok(Response::new(Box::new(BytesBody::from(hex::encode(
|
|
version_uuid,
|
|
)))))
|
|
}
|
|
&Method::DELETE => {
|
|
let version_uuid = handle_delete(garage, &bucket, &key).await?;
|
|
Ok(Response::new(Box::new(BytesBody::from(hex::encode(
|
|
version_uuid,
|
|
)))))
|
|
}
|
|
_ => 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.clone(),
|
|
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.clone(),
|
|
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.clone());
|
|
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.clone());
|
|
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.clone(),
|
|
);
|
|
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.clone(),
|
|
});
|
|
|
|
let block_ref = BlockRef {
|
|
block: hash,
|
|
version: version.uuid.clone(),
|
|
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 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.clone(),
|
|
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.clone(), 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)?)
|
|
}
|
|
}
|
|
}
|