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Fix partNumber issues (fixes #201) #202

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lx merged 2 commits from get-head-part-number into main 2022-01-25 12:05:47 +00:00
Conversation 0 Commits 2 Files changed 3 +117 -91
1 changed files with 117 additions and 91 deletions
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208
src/api/s3_get.rs
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@ -19,6 +19,8 @@ use garage_model::version_table::*;
use crate::error::*;
const X_AMZ_MP_PARTS_COUNT: &str = "x-amz-mp-parts-count";
fn object_headers(
version: &ObjectVersion,
version_meta: &ObjectVersionMeta,
@ -120,39 +122,49 @@ pub async fn handle_head(
}
if let Some(pn) = part_number {
if let ObjectVersionData::Inline(_, _) = version_data {
// Not a multipart upload
return Err(Error::BadRequest(
"Cannot process part_number argument: not a multipart upload".into(),
));
match version_data {
ObjectVersionData::Inline(_, bytes) => {
if pn != 1 {
return Err(Error::InvalidPart);
}
Ok(object_headers(object_version, version_meta)
.header(CONTENT_LENGTH, format!("{}", bytes.len()))
.header(
CONTENT_RANGE,
format!("bytes 0-{}/{}", bytes.len() - 1, bytes.len()),
)
.header(X_AMZ_MP_PARTS_COUNT, "1")
.status(StatusCode::PARTIAL_CONTENT)
.body(Body::empty())?)
}
ObjectVersionData::FirstBlock(_, _) => {
let version = garage
.version_table
.get(&object_version.uuid, &EmptyKey)
.await?
.ok_or(Error::NoSuchKey)?;
let (part_offset, part_end) =
calculate_part_bounds(&version, pn).ok_or(Error::InvalidPart)?;
let n_parts = version.parts_etags.items().len();
Ok(object_headers(object_version, version_meta)
.header(CONTENT_LENGTH, format!("{}", part_end - part_offset))
.header(
CONTENT_RANGE,
format!(
"bytes {}-{}/{}",
part_offset,
part_end - 1,
version_meta.size
),
)
.header(X_AMZ_MP_PARTS_COUNT, format!("{}", n_parts))
.status(StatusCode::PARTIAL_CONTENT)
.body(Body::empty())?)
}
_ => unreachable!(),
}
let version = garage
.version_table
.get(&object_version.uuid, &EmptyKey)
.await?
.ok_or(Error::NoSuchKey)?;
if !version.has_part_number(pn) {
return Err(Error::BadRequest(format!(
"Part number {} does not exist",
pn
)));
}
let part_size: u64 = version
.blocks
.items()
.iter()
.filter(|(k, _)| k.part_number == pn)
.map(|(_, b)| b.size)
.sum();
let n_parts = version.parts_etags.items().len();
Ok(object_headers(object_version, version_meta)
.header(CONTENT_LENGTH, format!("{}", part_size))
.header("x-amz-mp-parts-count", format!("{}", n_parts))
.status(StatusCode::OK)
.body(Body::empty())?)
} else {
Ok(object_headers(object_version, version_meta)
.header(CONTENT_LENGTH, format!("{}", version_meta.size))
@ -196,22 +208,27 @@ pub async fn handle_get(
return Ok(cached);
}
if let Some(pn) = part_number {
return handle_get_part(garage, req, last_v, last_v_data, last_v_meta, pn).await;
}
// No part_number specified, it's a normal get object
if let Some(range) = parse_range_header(req, last_v_meta.size)? {
return handle_get_range(
garage,
last_v,
last_v_data,
last_v_meta,
range.start,
range.start + range.length,
)
.await;
match (part_number, parse_range_header(req, last_v_meta.size)?) {
(Some(_), Some(_)) => {
return Err(Error::BadRequest(
"Cannot specify both partNumber and Range header".into(),
));
}
(Some(pn), None) => {
return handle_get_part(garage, last_v, last_v_data, last_v_meta, pn).await;
}
(None, Some(range)) => {
return handle_get_range(
garage,
last_v,
last_v_data,
last_v_meta,
range.start,
range.start + range.length,
)
.await;
}
(None, None) => (),
}
let resp_builder = object_headers(last_v, last_v_meta)
@ -305,58 +322,51 @@ async fn handle_get_range(
async fn handle_get_part(
garage: Arc<Garage>,
req: &Request<Body>,
object_version: &ObjectVersion,
version_data: &ObjectVersionData,
version_meta: &ObjectVersionMeta,
part_number: u64,
) -> Result<Response<Body>, Error> {
let version = if let ObjectVersionData::FirstBlock(_, _) = version_data {
garage
.version_table
.get(&object_version.uuid, &EmptyKey)
.await?
.ok_or(Error::NoSuchKey)?
} else {
return Err(Error::BadRequest(
"Cannot handle part_number: not a multipart upload.".into(),
));
};
let resp_builder =
object_headers(object_version, version_meta).status(StatusCode::PARTIAL_CONTENT);
let blocks = version
.blocks
.items()
.iter()
.filter(|(k, _)| k.part_number == part_number)
.cloned()
.collect::<Vec<_>>();
match version_data {
ObjectVersionData::Inline(_, bytes) => {
if part_number != 1 {
return Err(Error::InvalidPart);
}
Ok(resp_builder
.header(CONTENT_LENGTH, format!("{}", bytes.len()))
.header(
CONTENT_RANGE,
format!("bytes {}-{}/{}", 0, bytes.len() - 1, bytes.len()),
)
.header(X_AMZ_MP_PARTS_COUNT, "1")
.body(Body::from(bytes.to_vec()))?)
}
ObjectVersionData::FirstBlock(_, _) => {
let version = garage
.version_table
.get(&object_version.uuid, &EmptyKey)
.await?
.ok_or(Error::NoSuchKey)?;
if blocks.is_empty() {
return Err(Error::BadRequest(format!("No such part: {}", part_number)));
}
let (begin, end) =
calculate_part_bounds(&version, part_number).ok_or(Error::InvalidPart)?;
let n_parts = version.parts_etags.items().len();
let part_size = blocks.iter().map(|(_, b)| b.size).sum();
let body = body_from_blocks_range(garage, version.blocks.items(), begin, end);
if let Some(r) = parse_range_header(req, part_size)? {
let range_begin = r.start;
let range_end = r.start + r.length;
let body = body_from_blocks_range(garage, &blocks[..], range_begin, range_end);
Ok(object_headers(object_version, version_meta)
.header(CONTENT_LENGTH, format!("{}", range_end - range_begin))
.header(
CONTENT_RANGE,
format!("bytes {}-{}/{}", range_begin, range_end - 1, part_size),
)
.status(StatusCode::PARTIAL_CONTENT)
.body(body)?)
} else {
let body = body_from_blocks_range(garage, &blocks[..], 0, part_size);
Ok(object_headers(object_version, version_meta)
.header(CONTENT_LENGTH, format!("{}", part_size))
.status(StatusCode::OK)
.body(body)?)
Ok(resp_builder
.header(CONTENT_LENGTH, format!("{}", end - begin))
.header(
CONTENT_RANGE,
format!("bytes {}-{}/{}", begin, end - 1, version_meta.size),
)
.header(X_AMZ_MP_PARTS_COUNT, format!("{}", n_parts))
.body(body)?)
}
_ => unreachable!(),
}
}
@ -382,6 +392,22 @@ fn parse_range_header(
Ok(range)
}
fn calculate_part_bounds(v: &Version, part_number: u64) -> Option<(u64, u64)> {
let mut offset = 0;
for (i, (bk, bv)) in v.blocks.items().iter().enumerate() {
if bk.part_number == part_number {
let size: u64 = v.blocks.items()[i..]
.iter()
.take_while(|(k, _)| k.part_number == part_number)
.map(|(_, v)| v.size)
.sum();
return Some((offset, offset + size));
}
offset += bv.size;
}
None
}
fn body_from_blocks_range(
garage: Arc<Garage>,
all_blocks: &[(VersionBlockKey, VersionBlock)],