139 lines
4.1 KiB
Rust
139 lines
4.1 KiB
Rust
use std::fmt::Write;
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use std::sync::Arc;
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use chrono::{SecondsFormat, Utc};
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use hyper::{Body, Response};
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use garage_table::*;
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use garage_util::data::*;
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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::object_table::*;
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use garage_model::version_table::*;
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use crate::error::*;
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pub async fn handle_copy(
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garage: Arc<Garage>,
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dest_bucket: &str,
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dest_key: &str,
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source_bucket: &str,
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source_key: &str,
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) -> Result<Response<Body>, Error> {
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let source_object = garage
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.object_table
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.get(&source_bucket.to_string(), &source_key.to_string())
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.await?
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.ok_or(Error::NotFound)?;
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let source_last_v = source_object
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.versions()
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.iter()
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.rev()
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.filter(|v| v.is_complete())
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.next()
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.ok_or(Error::NotFound)?;
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let source_last_state = match &source_last_v.state {
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ObjectVersionState::Complete(x) => x,
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_ => unreachable!(),
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};
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let new_uuid = gen_uuid();
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let new_timestamp = now_msec();
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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(source_last_state.clone()),
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};
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let dest_object = Object::new(
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dest_bucket.to_string(),
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dest_key.to_string(),
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vec![dest_object_version],
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);
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match source_last_state {
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ObjectVersionData::DeleteMarker => {
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return Err(Error::NotFound);
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}
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ObjectVersionData::Inline(_meta, _bytes) => {
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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_last_v.uuid, &EmptyKey)
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.await?;
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let source_version = source_version.ok_or(Error::NotFound)?;
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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(meta.headers.clone()),
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};
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let tmp_dest_object = Object::new(
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dest_bucket.to_string(),
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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 = Version::new(
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new_uuid,
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dest_bucket.to_string(),
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dest_key.to_string(),
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false,
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);
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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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garage.object_table.insert(&dest_object).await?;
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}
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}
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let now = Utc::now(); // FIXME use the unix timestamp from above
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let last_modified = now.to_rfc3339_opts(SecondsFormat::Secs, true);
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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!(&mut xml, r#"<CopyObjectResult>"#).unwrap();
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writeln!(&mut xml, "\t<LastModified>{}</LastModified>", last_modified).unwrap();
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writeln!(&mut xml, "</CopyObjectResult>").unwrap();
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Ok(Response::builder()
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.header("Content-Type", "application/xml")
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.body(Body::from(xml.into_bytes()))?)
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}
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