trinity-1686a
e55fa38c99
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fix #96 fix #162 by returning Forbidden instead Bad Request Co-authored-by: Trinity Pointard <trinity.pointard@gmail.com> Reviewed-on: #196 Co-authored-by: trinity-1686a <trinity.pointard@gmail.com> Co-committed-by: trinity-1686a <trinity.pointard@gmail.com>
615 lines
18 KiB
Rust
615 lines
18 KiB
Rust
use std::sync::Arc;
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use std::time::{Duration, SystemTime, UNIX_EPOCH};
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use futures::TryFutureExt;
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use md5::{Digest as Md5Digest, Md5};
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use hyper::{Body, Request, Response};
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use serde::Serialize;
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use garage_table::*;
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use garage_util::data::*;
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use garage_util::time::*;
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use garage_model::block_ref_table::*;
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use garage_model::garage::Garage;
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use garage_model::key_table::Key;
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use garage_model::object_table::*;
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use garage_model::version_table::*;
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use crate::api_server::{parse_bucket_key, resolve_bucket};
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use crate::error::*;
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use crate::s3_put::{decode_upload_id, get_headers};
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use crate::s3_xml::{self, xmlns_tag};
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pub async fn handle_copy(
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garage: Arc<Garage>,
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api_key: &Key,
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req: &Request<Body>,
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dest_bucket_id: Uuid,
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dest_key: &str,
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) -> Result<Response<Body>, Error> {
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let copy_precondition = CopyPreconditionHeaders::parse(req)?;
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let source_object = get_copy_source(&garage, api_key, req).await?;
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let (source_version, source_version_data, source_version_meta) =
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extract_source_info(&source_object)?;
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// Check precondition, e.g. x-amz-copy-source-if-match
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copy_precondition.check(source_version, &source_version_meta.etag)?;
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// Generate parameters for copied object
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let new_uuid = gen_uuid();
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let new_timestamp = now_msec();
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// Implement x-amz-metadata-directive: REPLACE
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let new_meta = match req.headers().get("x-amz-metadata-directive") {
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Some(v) if v == hyper::header::HeaderValue::from_static("REPLACE") => ObjectVersionMeta {
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headers: get_headers(req)?,
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size: source_version_meta.size,
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etag: source_version_meta.etag.clone(),
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},
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_ => source_version_meta.clone(),
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};
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let etag = new_meta.etag.to_string();
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// Save object copy
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match source_version_data {
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ObjectVersionData::DeleteMarker => unreachable!(),
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ObjectVersionData::Inline(_meta, bytes) => {
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let dest_object_version = ObjectVersion {
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uuid: new_uuid,
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timestamp: new_timestamp,
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state: ObjectVersionState::Complete(ObjectVersionData::Inline(
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new_meta,
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bytes.clone(),
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)),
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};
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let dest_object = Object::new(
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dest_bucket_id,
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dest_key.to_string(),
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vec![dest_object_version],
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);
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garage.object_table.insert(&dest_object).await?;
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}
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ObjectVersionData::FirstBlock(_meta, first_block_hash) => {
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// Get block list from source version
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let source_version = garage
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.version_table
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.get(&source_version.uuid, &EmptyKey)
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.await?;
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let source_version = source_version.ok_or(Error::NoSuchKey)?;
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// Write an "uploading" marker in Object table
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// This holds a reference to the object in the Version table
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// so that it won't be deleted, e.g. by repair_versions.
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let tmp_dest_object_version = ObjectVersion {
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uuid: new_uuid,
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timestamp: new_timestamp,
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state: ObjectVersionState::Uploading(new_meta.headers.clone()),
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};
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let tmp_dest_object = Object::new(
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dest_bucket_id,
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dest_key.to_string(),
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vec![tmp_dest_object_version],
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);
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garage.object_table.insert(&tmp_dest_object).await?;
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// Write version in the version table. Even with empty block list,
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// this means that the BlockRef entries linked to this version cannot be
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// marked as deleted (they are marked as deleted only if the Version
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// doesn't exist or is marked as deleted).
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let mut dest_version =
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Version::new(new_uuid, dest_bucket_id, dest_key.to_string(), false);
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garage.version_table.insert(&dest_version).await?;
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// Fill in block list for version and insert block refs
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for (bk, bv) in source_version.blocks.items().iter() {
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dest_version.blocks.put(*bk, *bv);
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}
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let dest_block_refs = dest_version
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.blocks
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.items()
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.iter()
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.map(|b| BlockRef {
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block: b.1.hash,
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version: new_uuid,
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deleted: false.into(),
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})
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.collect::<Vec<_>>();
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futures::try_join!(
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garage.version_table.insert(&dest_version),
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garage.block_ref_table.insert_many(&dest_block_refs[..]),
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)?;
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// Insert final object
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// We do this last because otherwise there is a race condition in the case where
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// the copy call has the same source and destination (this happens, rclone does
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// it to update the modification timestamp for instance). If we did this concurrently
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// with the stuff before, the block's reference counts could be decremented before
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// they are incremented again for the new version, leading to data being deleted.
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let dest_object_version = ObjectVersion {
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uuid: new_uuid,
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timestamp: new_timestamp,
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state: ObjectVersionState::Complete(ObjectVersionData::FirstBlock(
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new_meta,
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*first_block_hash,
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)),
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};
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let dest_object = Object::new(
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dest_bucket_id,
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dest_key.to_string(),
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vec![dest_object_version],
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);
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garage.object_table.insert(&dest_object).await?;
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}
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}
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let last_modified = msec_to_rfc3339(new_timestamp);
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let result = CopyObjectResult {
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last_modified: s3_xml::Value(last_modified),
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etag: s3_xml::Value(format!("\"{}\"", etag)),
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};
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let xml = s3_xml::to_xml_with_header(&result)?;
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Ok(Response::builder()
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.header("Content-Type", "application/xml")
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.header("x-amz-version-id", hex::encode(new_uuid))
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.header(
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"x-amz-copy-source-version-id",
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hex::encode(source_version.uuid),
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)
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.body(Body::from(xml))?)
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}
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pub async fn handle_upload_part_copy(
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garage: Arc<Garage>,
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api_key: &Key,
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req: &Request<Body>,
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dest_bucket_id: Uuid,
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dest_key: &str,
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part_number: u64,
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upload_id: &str,
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) -> Result<Response<Body>, Error> {
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let copy_precondition = CopyPreconditionHeaders::parse(req)?;
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let dest_version_uuid = decode_upload_id(upload_id)?;
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let dest_key = dest_key.to_string();
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let (source_object, dest_object) = futures::try_join!(
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get_copy_source(&garage, api_key, req),
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garage
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.object_table
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.get(&dest_bucket_id, &dest_key)
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.map_err(Error::from),
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)?;
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let dest_object = dest_object.ok_or(Error::NoSuchKey)?;
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let (source_object_version, source_version_data, source_version_meta) =
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extract_source_info(&source_object)?;
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// Check precondition on source, e.g. x-amz-copy-source-if-match
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copy_precondition.check(source_object_version, &source_version_meta.etag)?;
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// Check source range is valid
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let source_range = match req.headers().get("x-amz-copy-source-range") {
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Some(range) => {
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let range_str = range.to_str()?;
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let mut ranges = http_range::HttpRange::parse(range_str, source_version_meta.size)
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.map_err(|e| (e, source_version_meta.size))?;
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if ranges.len() != 1 {
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return Err(Error::BadRequest(
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"Invalid x-amz-copy-source-range header: exactly 1 range must be given".into(),
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));
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} else {
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ranges.pop().unwrap()
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}
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}
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None => http_range::HttpRange {
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start: 0,
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length: source_version_meta.size,
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},
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};
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// Check destination version is indeed in uploading state
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if !dest_object
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.versions()
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.iter()
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.any(|v| v.uuid == dest_version_uuid && v.is_uploading())
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{
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return Err(Error::NoSuchUpload);
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}
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// Check source version is not inlined
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match source_version_data {
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ObjectVersionData::DeleteMarker => unreachable!(),
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ObjectVersionData::Inline(_meta, _bytes) => {
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// This is only for small files, we don't bother handling this.
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// (in AWS UploadPartCopy works for parts at least 5MB which
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// is never the case of an inline object)
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return Err(Error::BadRequest(
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"Source object is too small (minimum part size is 5Mb)".into(),
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));
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}
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ObjectVersionData::FirstBlock(_meta, _first_block_hash) => (),
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};
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// Fetch source versin with its block list,
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// and destination version to check part hasn't yet been uploaded
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let (source_version, dest_version) = futures::try_join!(
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garage
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.version_table
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.get(&source_object_version.uuid, &EmptyKey),
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garage.version_table.get(&dest_version_uuid, &EmptyKey),
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)?;
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let source_version = source_version.ok_or(Error::NoSuchKey)?;
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// Check this part number hasn't yet been uploaded
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if let Some(dv) = dest_version {
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if dv.has_part_number(part_number) {
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return Err(Error::BadRequest(format!(
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"Part number {} has already been uploaded",
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part_number
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)));
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}
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}
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// We want to reuse blocks from the source version as much as possible.
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// However, we still need to get the data from these blocks
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// because we need to know it to calculate the MD5sum of the part
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// which is used as its ETag.
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// First, calculate what blocks we want to keep,
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// and the subrange of the block to take, if the bounds of the
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// requested range are in the middle.
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let (range_begin, range_end) = (source_range.start, source_range.start + source_range.length);
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let mut blocks_to_copy = vec![];
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let mut current_offset = 0;
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let mut size_to_copy = 0;
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for (_bk, block) in source_version.blocks.items().iter() {
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let (block_begin, block_end) = (current_offset, current_offset + block.size);
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if block_begin < range_end && block_end > range_begin {
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let subrange_begin = if block_begin < range_begin {
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Some(range_begin - block_begin)
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} else {
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None
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};
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let subrange_end = if block_end > range_end {
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Some(range_end - block_begin)
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} else {
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None
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};
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let range_to_copy = match (subrange_begin, subrange_end) {
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(Some(b), Some(e)) => Some(b as usize..e as usize),
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(None, Some(e)) => Some(0..e as usize),
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(Some(b), None) => Some(b as usize..block.size as usize),
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(None, None) => None,
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};
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size_to_copy += range_to_copy
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.as_ref()
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.map(|x| x.len() as u64)
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.unwrap_or(block.size);
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blocks_to_copy.push((block.hash, range_to_copy));
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}
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current_offset = block_end;
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}
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if size_to_copy < 1024 * 1024 {
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return Err(Error::BadRequest(format!(
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"Not enough data to copy: {} bytes (minimum: 1MB)",
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size_to_copy
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)));
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}
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// Now, actually copy the blocks
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let mut md5hasher = Md5::new();
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let mut block = Some(
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garage
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.block_manager
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.rpc_get_block(&blocks_to_copy[0].0)
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.await?,
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);
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let mut current_offset = 0;
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for (i, (block_hash, range_to_copy)) in blocks_to_copy.iter().enumerate() {
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let (current_block, subrange_hash) = match range_to_copy.clone() {
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Some(r) => {
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let subrange = block.take().unwrap()[r].to_vec();
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let hash = blake2sum(&subrange);
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(subrange, hash)
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}
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None => (block.take().unwrap(), *block_hash),
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};
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md5hasher.update(¤t_block[..]);
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let mut version = Version::new(dest_version_uuid, dest_bucket_id, dest_key.clone(), false);
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version.blocks.put(
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VersionBlockKey {
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part_number,
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offset: current_offset,
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},
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VersionBlock {
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hash: subrange_hash,
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size: current_block.len() as u64,
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},
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);
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current_offset += current_block.len() as u64;
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let block_ref = BlockRef {
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block: subrange_hash,
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version: dest_version_uuid,
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deleted: false.into(),
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};
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let next_block_hash = blocks_to_copy.get(i + 1).map(|(h, _)| *h);
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let garage2 = garage.clone();
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let garage3 = garage.clone();
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let is_subrange = range_to_copy.is_some();
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let (_, _, _, next_block) = futures::try_join!(
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// Thing 1: if we are taking a subrange of the source block,
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// we need to insert that subrange as a new block.
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async move {
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if is_subrange {
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garage2
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.block_manager
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.rpc_put_block(subrange_hash, current_block)
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.await
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} else {
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Ok(())
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}
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},
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// Thing 2: we need to insert the block in the version
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garage.version_table.insert(&version),
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// Thing 3: we need to add a block reference
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garage.block_ref_table.insert(&block_ref),
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// Thing 4: we need to prefetch the next block
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async move {
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match next_block_hash {
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Some(h) => Ok(Some(garage3.block_manager.rpc_get_block(&h).await?)),
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None => Ok(None),
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}
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},
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)?;
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block = next_block;
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}
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let data_md5sum = md5hasher.finalize();
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let etag = hex::encode(data_md5sum);
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// Put the part's ETag in the Versiontable
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let mut version = Version::new(dest_version_uuid, dest_bucket_id, dest_key.clone(), false);
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version.parts_etags.put(part_number, etag.clone());
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garage.version_table.insert(&version).await?;
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// LGTM
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let resp_xml = s3_xml::to_xml_with_header(&CopyPartResult {
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xmlns: (),
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etag: s3_xml::Value(format!("\"{}\"", etag)),
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last_modified: s3_xml::Value(msec_to_rfc3339(source_object_version.timestamp)),
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})?;
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Ok(Response::builder()
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.header("Content-Type", "application/xml")
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.header(
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"x-amz-copy-source-version-id",
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hex::encode(source_object_version.uuid),
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)
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.body(Body::from(resp_xml))?)
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}
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async fn get_copy_source(
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garage: &Garage,
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api_key: &Key,
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req: &Request<Body>,
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) -> Result<Object, Error> {
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let copy_source = req.headers().get("x-amz-copy-source").unwrap().to_str()?;
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let copy_source = percent_encoding::percent_decode_str(copy_source).decode_utf8()?;
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let (source_bucket, source_key) = parse_bucket_key(©_source, None)?;
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let source_bucket_id = resolve_bucket(garage, &source_bucket.to_string(), api_key).await?;
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if !api_key.allow_read(&source_bucket_id) {
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return Err(Error::Forbidden(format!(
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"Reading from bucket {} not allowed for this key",
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source_bucket
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)));
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}
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let source_key = source_key.ok_or_bad_request("No source key specified")?;
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let source_object = garage
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.object_table
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.get(&source_bucket_id, &source_key.to_string())
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.await?
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.ok_or(Error::NoSuchKey)?;
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Ok(source_object)
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}
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fn extract_source_info(
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source_object: &Object,
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) -> Result<(&ObjectVersion, &ObjectVersionData, &ObjectVersionMeta), Error> {
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let source_version = source_object
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.versions()
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.iter()
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.rev()
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.find(|v| v.is_complete())
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.ok_or(Error::NoSuchKey)?;
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let source_version_data = match &source_version.state {
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ObjectVersionState::Complete(x) => x,
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_ => unreachable!(),
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};
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let source_version_meta = match source_version_data {
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ObjectVersionData::DeleteMarker => {
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return Err(Error::NoSuchKey);
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}
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ObjectVersionData::Inline(meta, _bytes) => meta,
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ObjectVersionData::FirstBlock(meta, _fbh) => meta,
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};
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Ok((source_version, source_version_data, source_version_meta))
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}
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struct CopyPreconditionHeaders {
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copy_source_if_match: Option<Vec<String>>,
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copy_source_if_modified_since: Option<SystemTime>,
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copy_source_if_none_match: Option<Vec<String>>,
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copy_source_if_unmodified_since: Option<SystemTime>,
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}
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|
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impl CopyPreconditionHeaders {
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fn parse(req: &Request<Body>) -> Result<Self, Error> {
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Ok(Self {
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copy_source_if_match: req
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.headers()
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.get("x-amz-copy-source-if-match")
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.map(|x| x.to_str())
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.transpose()?
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.map(|x| {
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x.split(',')
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.map(|m| m.trim().trim_matches('"').to_string())
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.collect::<Vec<_>>()
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}),
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copy_source_if_modified_since: req
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.headers()
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.get("x-amz-copy-source-if-modified-since")
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.map(|x| x.to_str())
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.transpose()?
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.map(httpdate::parse_http_date)
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.transpose()
|
|
.ok_or_bad_request("Invalid date in x-amz-copy-source-if-modified-since")?,
|
|
copy_source_if_none_match: req
|
|
.headers()
|
|
.get("x-amz-copy-source-if-none-match")
|
|
.map(|x| x.to_str())
|
|
.transpose()?
|
|
.map(|x| {
|
|
x.split(',')
|
|
.map(|m| m.trim().trim_matches('"').to_string())
|
|
.collect::<Vec<_>>()
|
|
}),
|
|
copy_source_if_unmodified_since: req
|
|
.headers()
|
|
.get("x-amz-copy-source-if-unmodified-since")
|
|
.map(|x| x.to_str())
|
|
.transpose()?
|
|
.map(httpdate::parse_http_date)
|
|
.transpose()
|
|
.ok_or_bad_request("Invalid date in x-amz-copy-source-if-unmodified-since")?,
|
|
})
|
|
}
|
|
|
|
fn check(&self, v: &ObjectVersion, etag: &str) -> Result<(), Error> {
|
|
let v_date = UNIX_EPOCH + Duration::from_millis(v.timestamp);
|
|
|
|
let ok = match (
|
|
&self.copy_source_if_match,
|
|
&self.copy_source_if_unmodified_since,
|
|
&self.copy_source_if_none_match,
|
|
&self.copy_source_if_modified_since,
|
|
) {
|
|
// TODO I'm not sure all of the conditions are evaluated correctly here
|
|
|
|
// If we have both if-match and if-unmodified-since,
|
|
// basically we don't care about if-unmodified-since,
|
|
// because in the spec it says that if if-match evaluates to
|
|
// true but if-unmodified-since evaluates to false,
|
|
// the copy is still done.
|
|
(Some(im), _, None, None) => im.iter().any(|x| x == etag || x == "*"),
|
|
(None, Some(ius), None, None) => v_date <= *ius,
|
|
|
|
// If we have both if-none-match and if-modified-since,
|
|
// then both of the two conditions must evaluate to true
|
|
(None, None, Some(inm), Some(ims)) => {
|
|
!inm.iter().any(|x| x == etag || x == "*") && v_date > *ims
|
|
}
|
|
(None, None, Some(inm), None) => !inm.iter().any(|x| x == etag || x == "*"),
|
|
(None, None, None, Some(ims)) => v_date > *ims,
|
|
(None, None, None, None) => true,
|
|
_ => {
|
|
return Err(Error::BadRequest(
|
|
"Invalid combination of x-amz-copy-source-if-xxxxx headers".into(),
|
|
))
|
|
}
|
|
};
|
|
|
|
if ok {
|
|
Ok(())
|
|
} else {
|
|
Err(Error::PreconditionFailed)
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Serialize, PartialEq)]
|
|
pub struct CopyObjectResult {
|
|
#[serde(rename = "LastModified")]
|
|
pub last_modified: s3_xml::Value,
|
|
#[serde(rename = "ETag")]
|
|
pub etag: s3_xml::Value,
|
|
}
|
|
|
|
#[derive(Debug, Serialize, PartialEq)]
|
|
pub struct CopyPartResult {
|
|
#[serde(serialize_with = "xmlns_tag")]
|
|
pub xmlns: (),
|
|
#[serde(rename = "LastModified")]
|
|
pub last_modified: s3_xml::Value,
|
|
#[serde(rename = "ETag")]
|
|
pub etag: s3_xml::Value,
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use crate::s3_xml::to_xml_with_header;
|
|
|
|
#[test]
|
|
fn copy_object_result() -> Result<(), Error> {
|
|
let copy_result = CopyObjectResult {
|
|
last_modified: s3_xml::Value(msec_to_rfc3339(0)),
|
|
etag: s3_xml::Value("\"9b2cf535f27731c974343645a3985328\"".to_string()),
|
|
};
|
|
assert_eq!(
|
|
to_xml_with_header(©_result)?,
|
|
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\
|
|
<CopyObjectResult>\
|
|
<LastModified>1970-01-01T00:00:00.000Z</LastModified>\
|
|
<ETag>"9b2cf535f27731c974343645a3985328"</ETag>\
|
|
</CopyObjectResult>\
|
|
"
|
|
);
|
|
Ok(())
|
|
}
|
|
|
|
#[test]
|
|
fn serialize_copy_part_result() -> Result<(), Error> {
|
|
let expected_retval = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\
|
|
<CopyPartResult xmlns=\"http://s3.amazonaws.com/doc/2006-03-01/\">\
|
|
<LastModified>2011-04-11T20:34:56.000Z</LastModified>\
|
|
<ETag>"9b2cf535f27731c974343645a3985328"</ETag>\
|
|
</CopyPartResult>";
|
|
let v = CopyPartResult {
|
|
xmlns: (),
|
|
last_modified: s3_xml::Value("2011-04-11T20:34:56.000Z".into()),
|
|
etag: s3_xml::Value("\"9b2cf535f27731c974343645a3985328\"".into()),
|
|
};
|
|
println!("{}", to_xml_with_header(&v)?);
|
|
|
|
assert_eq!(to_xml_with_header(&v)?, expected_retval);
|
|
|
|
Ok(())
|
|
}
|
|
}
|