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