use std::fmt::Write;
use std::sync::Arc;
use hyper::{Body, Request, Response};
use garage_util::data::*;
use garage_util::time::*;
use garage_model::garage::Garage;
use garage_model::object_table::*;
use crate::encoding::*;
use crate::error::*;
use crate::signature::verify_signed_content;
async fn handle_delete_internal(
garage: &Garage,
bucket: &str,
key: &str,
) -> Result<(UUID, UUID), Error> {
let object = garage
.object_table
.get(&bucket.to_string(), &key.to_string())
.await?
.ok_or(Error::NotFound)?; // No need to delete
let interesting_versions = object.versions().iter().filter(|v| match v.state {
ObjectVersionState::Aborted => false,
ObjectVersionState::Complete(ObjectVersionData::DeleteMarker) => false,
_ => true,
});
let mut version_to_delete = None;
let mut timestamp = now_msec();
for v in interesting_versions {
if v.timestamp + 1 > timestamp || version_to_delete.is_none() {
version_to_delete = Some(v.uuid);
}
timestamp = std::cmp::max(timestamp, v.timestamp + 1);
}
let deleted_version = version_to_delete.ok_or(Error::NotFound)?;
let version_uuid = gen_uuid();
let object = Object::new(
bucket.into(),
key.into(),
vec![ObjectVersion {
uuid: version_uuid,
timestamp: now_msec(),
state: ObjectVersionState::Complete(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>,
content_sha256: Option<Hash>,
) -> Result<Response<Body>, Error> {
let body = hyper::body::to_bytes(req.into_body()).await?;
verify_signed_content(content_sha256, &body[..])?;
let cmd_xml = roxmltree::Document::parse(&std::str::from_utf8(&body)?)?;
let cmd = parse_delete_objects_xml(&cmd_xml).ok_or_bad_request("Invalid delete XML query")?;
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>", xml_escape(&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>", xml_escape(&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::builder()
.header("Content-Type", "application/xml")
.body(Body::from(retxml.into_bytes()))?)
}
struct DeleteRequest {
objects: Vec<DeleteObject>,
}
struct DeleteObject {
key: String,
}
fn parse_delete_objects_xml(xml: &roxmltree::Document) -> Option<DeleteRequest> {
let mut ret = DeleteRequest { objects: vec![] };
let root = xml.root();
let delete = root.first_child()?;
if !delete.has_tag_name("Delete") {
return None;
}
for item in delete.children() {
if item.has_tag_name("Object") {
let key = item.children().find(|e| e.has_tag_name("Key"))?;
let key_str = key.text()?;
ret.objects.push(DeleteObject {
key: key_str.to_string(),
});
} else {
return None;
}
}
Some(ret)
}
