244 lines
6.5 KiB
Rust
244 lines
6.5 KiB
Rust
use std::collections::{BTreeMap, BTreeSet, HashMap};
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use std::sync::Arc;
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use hyper::{Body, Response};
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use garage_util::error::Error as GarageError;
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use garage_util::time::*;
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use garage_model::garage::Garage;
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use garage_model::object_table::*;
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use garage_table::DeletedFilter;
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use crate::encoding::*;
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use crate::error::*;
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use crate::s3_xml;
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#[derive(Debug)]
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pub struct ListObjectsQuery {
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pub is_v2: bool,
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pub bucket: String,
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pub delimiter: Option<String>,
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pub max_keys: usize,
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pub prefix: String,
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pub marker: Option<String>,
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pub continuation_token: Option<String>,
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pub start_after: Option<String>,
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pub urlencode_resp: bool,
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}
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#[derive(Debug)]
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struct ListResultInfo {
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last_modified: u64,
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size: u64,
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etag: String,
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}
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pub fn parse_list_objects_query(
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bucket: &str,
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params: &HashMap<String, String>,
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) -> Result<ListObjectsQuery, Error> {
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Ok(ListObjectsQuery {
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is_v2: params.get("list-type").map(|x| x == "2").unwrap_or(false),
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bucket: bucket.to_string(),
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delimiter: params.get("delimiter").filter(|x| !x.is_empty()).cloned(),
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max_keys: params
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.get("max-keys")
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.map(|x| {
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x.parse::<usize>()
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.ok_or_bad_request("Invalid value for max-keys")
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})
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.unwrap_or(Ok(1000))?,
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prefix: params.get("prefix").cloned().unwrap_or_default(),
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marker: params.get("marker").cloned(),
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continuation_token: params.get("continuation-token").cloned(),
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start_after: params.get("start-after").cloned(),
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urlencode_resp: params
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.get("encoding-type")
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.map(|x| x == "url")
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.unwrap_or(false),
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})
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}
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pub async fn handle_list(
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garage: Arc<Garage>,
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query: &ListObjectsQuery,
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) -> Result<Response<Body>, Error> {
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let mut result_keys = BTreeMap::<String, ListResultInfo>::new();
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let mut result_common_prefixes = BTreeSet::<String>::new();
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let mut next_chunk_start = if query.is_v2 {
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if let Some(ct) = &query.continuation_token {
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String::from_utf8(base64::decode(ct.as_bytes())?)?
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} else {
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query
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.start_after
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.clone()
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.unwrap_or_else(|| query.prefix.clone())
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}
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} else {
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query.marker.clone().unwrap_or_else(|| query.prefix.clone())
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};
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debug!(
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"List request: `{:?}` {} `{}`",
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query.delimiter, query.max_keys, query.prefix
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);
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let truncated;
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'query_loop: loop {
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let objects = garage
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.object_table
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.get_range(
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&query.bucket,
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Some(next_chunk_start.clone()),
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Some(DeletedFilter::NotDeleted),
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query.max_keys + 1,
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)
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.await?;
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debug!(
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"List: get range {} (max {}), results: {}",
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next_chunk_start,
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query.max_keys + 1,
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objects.len()
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);
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for object in objects.iter() {
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if !object.key.starts_with(&query.prefix) {
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truncated = None;
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break 'query_loop;
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}
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if query.is_v2 && query.start_after.as_ref() == Some(&object.key) {
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continue;
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}
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if let Some(version) = object.versions().iter().find(|x| x.is_data()) {
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if result_keys.len() + result_common_prefixes.len() >= query.max_keys {
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truncated = Some(object.key.to_string());
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break 'query_loop;
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}
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let common_prefix = if let Some(delimiter) = &query.delimiter {
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let relative_key = &object.key[query.prefix.len()..];
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relative_key
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.find(delimiter)
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.map(|i| &object.key[..query.prefix.len() + i + delimiter.len()])
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} else {
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None
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};
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if let Some(pfx) = common_prefix {
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result_common_prefixes.insert(pfx.to_string());
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} else {
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let meta = match &version.state {
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ObjectVersionState::Complete(ObjectVersionData::Inline(meta, _)) => meta,
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ObjectVersionState::Complete(ObjectVersionData::FirstBlock(meta, _)) => {
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meta
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}
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_ => unreachable!(),
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};
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let info = match result_keys.get(&object.key) {
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None => ListResultInfo {
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last_modified: version.timestamp,
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size: meta.size,
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etag: meta.etag.to_string(),
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},
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Some(_lri) => {
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return Err(Error::InternalError(GarageError::Message(format!(
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"Duplicate key?? {}",
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object.key
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))))
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}
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};
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result_keys.insert(object.key.clone(), info);
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};
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}
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}
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if objects.len() < query.max_keys + 1 {
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truncated = None;
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break 'query_loop;
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}
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if !objects.is_empty() {
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next_chunk_start = objects[objects.len() - 1].key.clone();
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}
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}
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let mut result = s3_xml::ListBucketResult {
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xmlns: (),
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name: s3_xml::Value(query.bucket.to_string()),
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prefix: uriencode_maybe(&query.prefix, query.urlencode_resp),
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marker: None,
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next_marker: None,
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start_after: None,
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continuation_token: None,
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next_continuation_token: None,
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max_keys: s3_xml::IntValue(query.max_keys as i64),
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delimiter: query
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.delimiter
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.as_ref()
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.map(|x| uriencode_maybe(x, query.urlencode_resp)),
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encoding_type: match query.urlencode_resp {
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true => Some(s3_xml::Value("url".to_string())),
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false => None,
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},
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key_count: Some(s3_xml::IntValue(
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result_keys.len() as i64 + result_common_prefixes.len() as i64,
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)),
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is_truncated: s3_xml::Value(format!("{}", truncated.is_some())),
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contents: vec![],
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common_prefixes: vec![],
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};
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if query.is_v2 {
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if let Some(ct) = &query.continuation_token {
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result.continuation_token = Some(s3_xml::Value(ct.to_string()));
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}
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if let Some(sa) = &query.start_after {
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result.start_after = Some(uriencode_maybe(sa, query.urlencode_resp));
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}
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if let Some(nct) = truncated {
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result.next_continuation_token = Some(s3_xml::Value(base64::encode(nct.as_bytes())));
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}
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} else {
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// TODO: are these supposed to be urlencoded when encoding-type is URL??
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if let Some(mkr) = &query.marker {
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result.marker = Some(uriencode_maybe(mkr, query.urlencode_resp));
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}
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if let Some(next_marker) = truncated {
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result.next_marker = Some(uriencode_maybe(&next_marker, query.urlencode_resp));
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}
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}
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for (key, info) in result_keys.iter() {
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result.contents.push(s3_xml::ListBucketItem {
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key: uriencode_maybe(key, query.urlencode_resp),
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last_modified: s3_xml::Value(msec_to_rfc3339(info.last_modified)),
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size: s3_xml::IntValue(info.size as i64),
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etag: s3_xml::Value(info.etag.to_string()),
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storage_class: s3_xml::Value("STANDARD".to_string()),
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});
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}
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for pfx in result_common_prefixes.iter() {
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//TODO: in V1, are these urlencoded when urlencode_resp is true ?? (proably)
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result.common_prefixes.push(s3_xml::CommonPrefix {
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prefix: uriencode_maybe(pfx, query.urlencode_resp),
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});
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}
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let xml = s3_xml::to_xml_with_header(&result)?;
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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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fn uriencode_maybe(s: &str, yes: bool) -> s3_xml::Value {
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if yes {
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s3_xml::Value(uri_encode(s, true))
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} else {
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s3_xml::Value(s.to_string())
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}
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}
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