forked from Deuxfleurs/garage
434 lines
11 KiB
Rust
434 lines
11 KiB
Rust
use std::collections::VecDeque;
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use std::fmt::Write;
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use std::sync::Arc;
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use futures::stream::*;
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use hyper::{Body, Request, Response};
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use garage_table::*;
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use garage_util::data::*;
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use garage_util::error::Error;
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use garage_core::block::INLINE_THRESHOLD;
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use garage_core::block_ref_table::*;
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use garage_core::garage::Garage;
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use garage_core::object_table::*;
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use garage_core::version_table::*;
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use crate::encoding::*;
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use crate::http_util::*;
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pub async fn handle_put(
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garage: Arc<Garage>,
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req: Request<Body>,
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bucket: &str,
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key: &str,
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) -> Result<Response<BodyType>, Error> {
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let version_uuid = gen_uuid();
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let mime_type = get_mime_type(&req)?;
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let body = req.into_body();
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let mut chunker = BodyChunker::new(body, garage.config.block_size);
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let first_block = match chunker.next().await? {
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Some(x) => x,
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None => vec![],
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};
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let mut object_version = ObjectVersion {
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uuid: version_uuid,
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timestamp: now_msec(),
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mime_type,
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size: first_block.len() as u64,
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state: ObjectVersionState::Uploading,
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data: ObjectVersionData::Uploading,
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};
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if first_block.len() < INLINE_THRESHOLD {
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object_version.data = ObjectVersionData::Inline(first_block);
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object_version.state = ObjectVersionState::Complete;
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let object = Object::new(bucket.into(), key.into(), vec![object_version]);
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garage.object_table.insert(&object).await?;
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return Ok(put_response(version_uuid));
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}
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let version = Version::new(version_uuid, bucket.into(), key.into(), false, vec![]);
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let first_block_hash = hash(&first_block[..]);
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object_version.data = ObjectVersionData::FirstBlock(first_block_hash);
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let object = Object::new(bucket.into(), key.into(), vec![object_version.clone()]);
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garage.object_table.insert(&object).await?;
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let total_size = read_and_put_blocks(
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&garage,
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version,
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1,
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first_block,
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first_block_hash,
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&mut chunker,
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)
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.await?;
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// TODO: if at any step we have an error, we should undo everything we did
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object_version.state = ObjectVersionState::Complete;
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object_version.size = total_size;
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let object = Object::new(bucket.into(), key.into(), vec![object_version]);
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garage.object_table.insert(&object).await?;
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Ok(put_response(version_uuid))
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}
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async fn read_and_put_blocks(
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garage: &Arc<Garage>,
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version: Version,
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part_number: u64,
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first_block: Vec<u8>,
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first_block_hash: Hash,
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chunker: &mut BodyChunker,
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) -> Result<u64, Error> {
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let mut next_offset = first_block.len();
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let mut put_curr_version_block = put_block_meta(
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garage.clone(),
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&version,
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part_number,
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0,
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first_block_hash,
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first_block.len() as u64,
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);
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let mut put_curr_block = garage
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.block_manager
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.rpc_put_block(first_block_hash, first_block);
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loop {
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let (_, _, next_block) =
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futures::try_join!(put_curr_block, put_curr_version_block, chunker.next())?;
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if let Some(block) = next_block {
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let block_hash = hash(&block[..]);
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let block_len = block.len();
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put_curr_version_block = put_block_meta(
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garage.clone(),
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&version,
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part_number,
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next_offset as u64,
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block_hash,
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block_len as u64,
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);
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put_curr_block = garage.block_manager.rpc_put_block(block_hash, block);
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next_offset += block_len;
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} else {
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break;
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}
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}
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Ok(next_offset as u64)
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}
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async fn put_block_meta(
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garage: Arc<Garage>,
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version: &Version,
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part_number: u64,
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offset: u64,
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hash: Hash,
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size: u64,
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) -> Result<(), Error> {
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// TODO: don't clone, restart from empty block list ??
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let mut version = version.clone();
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version
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.add_block(VersionBlock {
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part_number,
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offset,
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hash,
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size,
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})
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.unwrap();
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let block_ref = BlockRef {
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block: hash,
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version: version.uuid,
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deleted: false,
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};
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futures::try_join!(
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garage.version_table.insert(&version),
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garage.block_ref_table.insert(&block_ref),
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)?;
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Ok(())
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}
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struct BodyChunker {
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body: Body,
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read_all: bool,
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block_size: usize,
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buf: VecDeque<u8>,
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}
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impl BodyChunker {
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fn new(body: Body, block_size: usize) -> Self {
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Self {
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body,
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read_all: false,
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block_size,
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buf: VecDeque::new(),
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}
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}
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async fn next(&mut self) -> Result<Option<Vec<u8>>, Error> {
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while !self.read_all && self.buf.len() < self.block_size {
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if let Some(block) = self.body.next().await {
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let bytes = block?;
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trace!("Body next: {} bytes", bytes.len());
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self.buf.extend(&bytes[..]);
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} else {
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self.read_all = true;
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}
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}
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if self.buf.len() == 0 {
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Ok(None)
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} else if self.buf.len() <= self.block_size {
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let block = self.buf.drain(..).collect::<Vec<u8>>();
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Ok(Some(block))
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} else {
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let block = self.buf.drain(..self.block_size).collect::<Vec<u8>>();
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Ok(Some(block))
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}
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}
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}
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fn put_response(version_uuid: UUID) -> Response<BodyType> {
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let resp_bytes = format!("{}\n", hex::encode(version_uuid));
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Response::new(Box::new(BytesBody::from(resp_bytes)))
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}
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pub async fn handle_create_multipart_upload(
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garage: Arc<Garage>,
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req: &Request<Body>,
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bucket: &str,
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key: &str,
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) -> Result<Response<BodyType>, Error> {
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let version_uuid = gen_uuid();
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let mime_type = get_mime_type(req)?;
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let object_version = ObjectVersion {
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uuid: version_uuid,
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timestamp: now_msec(),
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mime_type,
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size: 0,
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state: ObjectVersionState::Uploading,
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data: ObjectVersionData::Uploading,
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};
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let object = Object::new(bucket.to_string(), key.to_string(), vec![object_version]);
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garage.object_table.insert(&object).await?;
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let mut xml = String::new();
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writeln!(&mut xml, r#"<?xml version="1.0" encoding="UTF-8"?>"#).unwrap();
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writeln!(
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&mut xml,
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r#"<InitiateMultipartUploadResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">"#
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)
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.unwrap();
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writeln!(&mut xml, "\t<Bucket>{}</Bucket>", bucket).unwrap();
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writeln!(&mut xml, "\t<Key>{}</Key>", xml_escape(key)).unwrap();
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writeln!(
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&mut xml,
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"\t<UploadId>{}</UploadId>",
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hex::encode(version_uuid)
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)
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.unwrap();
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writeln!(&mut xml, "</InitiateMultipartUploadResult>").unwrap();
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Ok(Response::new(Box::new(BytesBody::from(xml.into_bytes()))))
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}
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pub async fn handle_put_part(
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garage: Arc<Garage>,
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req: Request<Body>,
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bucket: &str,
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key: &str,
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part_number_str: &str,
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upload_id: &str,
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) -> Result<Response<BodyType>, Error> {
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// Check parameters
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let part_number = part_number_str
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.parse::<u64>()
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.map_err(|e| Error::BadRequest(format!("Invalid part number: {}", e)))?;
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let version_uuid =
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uuid_from_str(upload_id).map_err(|_| Error::BadRequest(format!("Invalid upload ID")))?;
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// Read first chuck, and at the same time try to get object to see if it exists
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let mut chunker = BodyChunker::new(req.into_body(), garage.config.block_size);
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let bucket = bucket.to_string();
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let key = key.to_string();
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let get_object_fut = garage.object_table.get(&bucket, &key);
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let get_first_block_fut = chunker.next();
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let (object, first_block) = futures::try_join!(get_object_fut, get_first_block_fut)?;
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// Check object is valid and multipart block can be accepted
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let first_block = match first_block {
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None => return Err(Error::BadRequest(format!("Empty body"))),
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Some(x) => x,
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};
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let object = match object {
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None => return Err(Error::BadRequest(format!("Object not found"))),
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Some(x) => x,
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};
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if !object.versions().iter().any(|v| {
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v.uuid == version_uuid
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&& v.state == ObjectVersionState::Uploading
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&& v.data == ObjectVersionData::Uploading
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}) {
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return Err(Error::BadRequest(format!(
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"Multipart upload does not exist or is otherwise invalid"
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)));
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}
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// Copy block to store
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let version = Version::new(version_uuid, bucket.into(), key.into(), false, vec![]);
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let first_block_hash = hash(&first_block[..]);
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read_and_put_blocks(
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&garage,
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version,
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part_number,
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first_block,
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first_block_hash,
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&mut chunker,
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)
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.await?;
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Ok(Response::new(Box::new(BytesBody::from(vec![]))))
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}
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pub async fn handle_complete_multipart_upload(
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garage: Arc<Garage>,
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_req: Request<Body>,
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bucket: &str,
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key: &str,
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upload_id: &str,
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) -> Result<Response<BodyType>, Error> {
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let version_uuid =
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uuid_from_str(upload_id).map_err(|_| Error::BadRequest(format!("Invalid upload ID")))?;
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let bucket = bucket.to_string();
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let key = key.to_string();
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let (object, version) = futures::try_join!(
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garage.object_table.get(&bucket, &key),
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garage.version_table.get(&version_uuid, &EmptyKey),
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)?;
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let object = match object {
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None => return Err(Error::BadRequest(format!("Object not found"))),
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Some(x) => x,
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};
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let object_version = object.versions().iter().find(|v| {
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v.uuid == version_uuid
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&& v.state == ObjectVersionState::Uploading
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&& v.data == ObjectVersionData::Uploading
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});
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let mut object_version = match object_version {
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None => {
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return Err(Error::BadRequest(format!(
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"Multipart upload does not exist or has already been completed"
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)))
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}
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Some(x) => x.clone(),
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};
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let version = match version {
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None => return Err(Error::BadRequest(format!("Version not found"))),
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Some(x) => x,
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};
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if version.blocks().len() == 0 {
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return Err(Error::BadRequest(format!("No data was uploaded")));
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}
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// TODO: check that all the parts that they pretend they gave us are indeed there
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// TODO: check MD5 sum of all uploaded parts? but that would mean we have to store them somewhere...
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let total_size = version
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.blocks()
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.iter()
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.map(|x| x.size)
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.fold(0, |x, y| x + y);
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object_version.size = total_size;
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object_version.state = ObjectVersionState::Complete;
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object_version.data = ObjectVersionData::FirstBlock(version.blocks()[0].hash);
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let final_object = Object::new(bucket.clone(), key.clone(), vec![object_version]);
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garage.object_table.insert(&final_object).await?;
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let mut xml = String::new();
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writeln!(&mut xml, r#"<?xml version="1.0" encoding="UTF-8"?>"#).unwrap();
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writeln!(
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&mut xml,
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r#"<CompleteMultipartUploadResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">"#
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)
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.unwrap();
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writeln!(
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&mut xml,
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"\t<Location>{}</Location>",
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garage.config.s3_api.s3_region
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)
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.unwrap();
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writeln!(&mut xml, "\t<Bucket>{}</Bucket>", bucket).unwrap();
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writeln!(&mut xml, "\t<Key>{}</Key>", xml_escape(&key)).unwrap();
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writeln!(&mut xml, "</CompleteMultipartUploadResult>").unwrap();
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Ok(Response::new(Box::new(BytesBody::from(xml.into_bytes()))))
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}
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pub async fn handle_abort_multipart_upload(
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garage: Arc<Garage>,
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bucket: &str,
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key: &str,
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upload_id: &str,
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) -> Result<Response<BodyType>, Error> {
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let version_uuid =
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uuid_from_str(upload_id).map_err(|_| Error::BadRequest(format!("Invalid upload ID")))?;
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let object = garage
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.object_table
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.get(&bucket.to_string(), &key.to_string())
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.await?;
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let object = match object {
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None => return Err(Error::BadRequest(format!("Object not found"))),
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Some(x) => x,
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};
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let object_version = object.versions().iter().find(|v| {
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v.uuid == version_uuid
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&& v.state == ObjectVersionState::Uploading
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&& v.data == ObjectVersionData::Uploading
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});
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let mut object_version = match object_version {
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None => {
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return Err(Error::BadRequest(format!(
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"Multipart upload does not exist or has already been completed"
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)))
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}
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Some(x) => x.clone(),
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};
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object_version.state = ObjectVersionState::Aborted;
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let final_object = Object::new(bucket.to_string(), key.to_string(), vec![object_version]);
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garage.object_table.insert(&final_object).await?;
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Ok(Response::new(Box::new(BytesBody::from(vec![]))))
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}
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fn get_mime_type(req: &Request<Body>) -> Result<String, Error> {
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Ok(req
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.headers()
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.get(hyper::header::CONTENT_TYPE)
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.map(|x| x.to_str())
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.unwrap_or(Ok("blob"))?
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.to_string())
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}
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fn uuid_from_str(id: &str) -> Result<UUID, ()> {
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let id_bin = hex::decode(id).map_err(|_| ())?;
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if id_bin.len() != 32 {
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return Err(());
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}
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let mut uuid = [0u8; 32];
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uuid.copy_from_slice(&id_bin[..]);
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Ok(UUID::from(uuid))
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}
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