2020-04-28 10:18:14 +00:00
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use std::sync::Arc;
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2020-05-01 15:52:35 +00:00
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use std::fmt::Write;
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use hyper::{Body, Request, Response};
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2020-04-28 10:18:14 +00:00
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use garage_util::data::*;
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use garage_util::error::Error;
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use garage_core::garage::Garage;
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use garage_core::object_table::*;
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2020-05-01 15:52:35 +00:00
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use crate::http_util::*;
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use crate::encoding::*;
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async fn handle_delete_internal(garage: &Garage, bucket: &str, key: &str) -> Result<(UUID, UUID), Error> {
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2020-04-28 10:18:14 +00:00
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let object = match 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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{
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None => {
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// No need to delete
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2020-05-01 15:52:35 +00:00
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return Err(Error::NotFound);
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2020-04-28 10:18:14 +00:00
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}
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Some(o) => o,
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};
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let interesting_versions = object.versions().iter().filter(|v| {
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v.data != ObjectVersionData::DeleteMarker && v.state != ObjectVersionState::Aborted
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});
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2020-05-01 15:52:35 +00:00
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let mut must_delete = None;
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2020-04-28 10:18:14 +00:00
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let mut timestamp = now_msec();
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for v in interesting_versions {
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2020-05-01 15:52:35 +00:00
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if v.timestamp + 1 > timestamp || must_delete.is_none() {
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must_delete = Some(v.uuid);
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}
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2020-04-28 10:18:14 +00:00
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timestamp = std::cmp::max(timestamp, v.timestamp + 1);
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}
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2020-05-01 15:52:35 +00:00
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let deleted_version = match must_delete {
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None => return Err(Error::NotFound),
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Some(v) => v,
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};
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2020-04-28 10:18:14 +00:00
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let version_uuid = gen_uuid();
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let object = Object::new(
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bucket.into(),
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key.into(),
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vec![ObjectVersion {
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uuid: version_uuid,
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timestamp: now_msec(),
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mime_type: "application/x-delete-marker".into(),
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size: 0,
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state: ObjectVersionState::Complete,
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data: ObjectVersionData::DeleteMarker,
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}],
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);
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garage.object_table.insert(&object).await?;
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2020-05-01 15:52:35 +00:00
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return Ok((deleted_version, version_uuid));
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}
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pub async fn handle_delete(garage: Arc<Garage>, bucket: &str, key: &str) -> Result<Response<BodyType>, Error> {
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let (_deleted_version, delete_marker_version) = handle_delete_internal(&garage, bucket, key).await?;
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Ok(Response::builder()
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.header("x-amz-version-id", hex::encode(delete_marker_version))
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.body(empty_body())
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.unwrap())
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}
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pub async fn handle_delete_objects(garage: Arc<Garage>, bucket: &str, req: Request<Body>) -> Result<Response<BodyType>, Error> {
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let body = hyper::body::to_bytes(req.into_body()).await?;
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let cmd_xml = roxmltree::Document::parse(&std::str::from_utf8(&body)?)?;
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let cmd = parse_delete_objects_xml(&cmd_xml)
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.map_err(|e| Error::BadRequest(format!("Invald delete XML query: {}", e)))?;
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let mut retxml = String::new();
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writeln!(&mut retxml, r#"<?xml version="1.0" encoding="UTF-8"?>"#).unwrap();
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writeln!(&mut retxml, "<DeleteObjectsOutput>").unwrap();
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for obj in cmd.objects.iter() {
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match handle_delete_internal(&garage, bucket, &obj.key).await {
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Ok((deleted_version, delete_marker_version)) => {
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writeln!(&mut retxml, "\t<Deleted>").unwrap();
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writeln!(&mut retxml, "\t\t<Key>{}</Key>", obj.key).unwrap();
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writeln!(&mut retxml, "\t\t<VersionId>{}</VersionId>", hex::encode(deleted_version)).unwrap();
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writeln!(&mut retxml, "\t\t<DeleteMarkerVersionId>{}</DeleteMarkerVersionId>", hex::encode(delete_marker_version)).unwrap();
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writeln!(&mut retxml, "\t</Deleted>").unwrap();
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}
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Err(e) => {
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writeln!(&mut retxml, "\t<Error>").unwrap();
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writeln!(&mut retxml, "\t\t<Code>{}</Code>", e.http_status_code()).unwrap();
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writeln!(&mut retxml, "\t\t<Key>{}</Key>", obj.key).unwrap();
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writeln!(&mut retxml, "\t\t<Message>{}</Message>", xml_escape(&format!("{}", e))).unwrap();
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writeln!(&mut retxml, "\t</Error>").unwrap();
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}
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}
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}
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writeln!(&mut retxml, "</DeleteObjectsOutput>").unwrap();
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Ok(Response::new(Box::new(BytesBody::from(retxml.into_bytes()))))
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}
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struct DeleteRequest {
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objects: Vec<DeleteObject>,
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2020-04-28 10:18:14 +00:00
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}
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2020-05-01 15:52:35 +00:00
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struct DeleteObject {
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key: String,
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}
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fn parse_delete_objects_xml(xml: &roxmltree::Document) -> Result<DeleteRequest, String> {
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let mut ret = DeleteRequest{objects: vec![]};
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let root = xml.root();
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let delete = match root.first_child() {
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Some(del) => del,
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None => return Err(format!("Delete tag not found")),
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};
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if !delete.has_tag_name("Delete") {
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return Err(format!("Invalid root tag: {:?}", root));
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}
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for item in delete.children() {
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if item.has_tag_name("Object") {
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if let Some(key) = item.children().find(|e| e.has_tag_name("Key")) {
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if let Some(key_str) = key.text() {
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ret.objects.push(DeleteObject{key: key_str.to_string()});
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} else {
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return Err(format!("No text for key: {:?}", key));
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}
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} else {
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return Err(format!("No delete key for item: {:?}", item));
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}
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} else {
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return Err(format!("Invalid delete item: {:?}", item));
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}
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}
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Ok(ret)
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}
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