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use std::collections::{BTreeMap, BTreeSet};
use std::fmt::Write;
use std::sync::Arc;
use chrono::{DateTime, NaiveDateTime, SecondsFormat, Utc};
use hyper::Response;
use garage_util::error::Error;
use garage_core::garage::Garage;
use garage_core::object_table::*;
use crate::api_server::BodyType;
use crate::http_util::*;
#[derive(Debug)]
struct ListResultInfo {
last_modified: u64,
size: u64,
}
pub async fn handle_list(
garage: Arc<Garage>,
bucket: &str,
delimiter: &str,
max_keys: usize,
prefix: &str,
) -> Result<Response<BodyType>, Error> {
let mut result_keys = BTreeMap::<String, ListResultInfo>::new();
let mut result_common_prefixes = BTreeSet::<String>::new();
let mut truncated = true;
let mut next_chunk_start = prefix.to_string();
debug!("List request: `{}` {} `{}`", delimiter, max_keys, prefix);
while result_keys.len() + result_common_prefixes.len() < max_keys && truncated {
let objects = garage
.object_table
.get_range(
&bucket.to_string(),
Some(next_chunk_start.clone()),
Some(()),
max_keys,
)
.await?;
for object in objects.iter() {
if let Some(version) = object
.versions()
.iter()
.find(|x| x.is_complete && x.data != ObjectVersionData::DeleteMarker)
{
if !object.key.starts_with(prefix) {
truncated = false;
break;
}
let common_prefix = if delimiter.len() > 0 {
let relative_key = &object.key[prefix.len()..];
match relative_key.find(delimiter) {
Some(i) => Some(&object.key[..prefix.len()+i+delimiter.len()]),
None => None,
}
} else {
None
};
if let Some(pfx) = common_prefix {
result_common_prefixes.insert(pfx.to_string());
} else {
let info = match result_keys.get(&object.key) {
None => ListResultInfo {
last_modified: version.timestamp,
size: version.size,
},
Some(_lri) => return Err(Error::Message(format!("Duplicate key?? {}", object.key))),
};
result_keys.insert(object.key.clone(), info);
};
}
}
if objects.len() < max_keys {
truncated = false;
}
if objects.len() > 0 {
next_chunk_start = objects[objects.len() - 1].key.clone();
}
}
let mut xml = String::new();
writeln!(&mut xml, r#"<?xml version="1.0" encoding="UTF-8"?>"#).unwrap();
writeln!(
&mut xml,
r#"<ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">"#
)
.unwrap();
writeln!(&mut xml, "\t<Bucket>{}</Bucket>", bucket).unwrap();
writeln!(&mut xml, "\t<Prefix>{}</Prefix>", prefix).unwrap();
writeln!(&mut xml, "\t<KeyCount>{}</KeyCount>", result_keys.len()).unwrap();
writeln!(&mut xml, "\t<MaxKeys>{}</MaxKeys>", max_keys).unwrap();
writeln!(&mut xml, "\t<IsTruncated>{}</IsTruncated>", truncated).unwrap();
for (key, info) in result_keys.iter() {
let last_modif = NaiveDateTime::from_timestamp(info.last_modified as i64 / 1000, 0);
let last_modif = DateTime::<Utc>::from_utc(last_modif, Utc);
let last_modif = last_modif.to_rfc3339_opts(SecondsFormat::Millis, true);
writeln!(&mut xml, "\t<Contents>").unwrap();
writeln!(&mut xml, "\t\t<Key>{}</Key>", xml_escape(key)).unwrap();
writeln!(&mut xml, "\t\t<LastModified>{}</LastModified>", last_modif).unwrap();
writeln!(&mut xml, "\t\t<Size>{}</Size>", info.size).unwrap();
writeln!(&mut xml, "\t\t<StorageClass>STANDARD</StorageClass>").unwrap();
writeln!(&mut xml, "\t</Contents>").unwrap();
}
if result_common_prefixes.len() > 0 {
writeln!(&mut xml, "\t<CommonPrefixes>").unwrap();
for pfx in result_common_prefixes.iter() {
writeln!(&mut xml, "\t<Prefix>{}</Prefix>", xml_escape(pfx)).unwrap();
}
writeln!(&mut xml, "\t</CommonPrefixes>").unwrap();
}
writeln!(&mut xml, "</ListBucketResult>").unwrap();
Ok(Response::new(Box::new(BytesBody::from(xml.into_bytes()))))
}
fn xml_escape(s: &str) -> String {
s.replace("<", "<")
.replace(">", ">")
.replace("\"", """)
}
|
