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use std::collections::VecDeque;
use std::sync::Arc;
use futures::stream::*;
use hyper::Body;
use garage_util::data::*;
use garage_util::error::Error;
use garage_core::block::INLINE_THRESHOLD;
use garage_core::block_ref_table::*;
use garage_core::garage::Garage;
use garage_core::object_table::*;
use garage_core::version_table::*;
pub 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.config.block_size);
let first_block = match chunker.next().await? {
Some(x) => x,
None => return Err(Error::BadRequest(format!("Empty body"))),
};
let mut object_version = ObjectVersion {
uuid: version_uuid,
timestamp: now_msec(),
mime_type: mime_type.to_string(),
size: first_block.len() as u64,
state: ObjectVersionState::Uploading,
data: ObjectVersionData::DeleteMarker,
};
if first_block.len() < INLINE_THRESHOLD {
object_version.data = ObjectVersionData::Inline(first_block);
object_version.state = ObjectVersionState::Complete;
let object = Object::new(bucket.into(), key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
return Ok(version_uuid);
}
let version = Version::new(version_uuid, bucket.into(), key.into(), false, vec![]);
let first_block_hash = hash(&first_block[..]);
object_version.data = ObjectVersionData::FirstBlock(first_block_hash);
let object = Object::new(bucket.into(), key.into(), vec![object_version.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, 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, 0, 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_version.state = ObjectVersionState::Complete;
object_version.size = next_offset as u64;
let object = Object::new(bucket.into(), key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
Ok(version_uuid)
}
async fn put_block_meta(
garage: Arc<Garage>,
version: &Version,
part_number: u64,
offset: u64,
hash: Hash,
) -> Result<(), Error> {
// TODO: don't clone, restart from empty block list ??
let mut version = version.clone();
version
.add_block(VersionBlock {
part_number,
offset,
hash,
})
.unwrap();
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))
}
}
}
pub 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 object = Object::new(
bucket.into(),
key.into(),
vec![ObjectVersion {
uuid: version_uuid,
timestamp: now_msec(),
mime_type: "application/x-delete-marker".into(),
size: 0,
state: ObjectVersionState::Complete,
data: ObjectVersionData::DeleteMarker,
}],
);
garage.object_table.insert(&object).await?;
return Ok(version_uuid);
}
|
