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Implement ListObjectsV2

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This commit is contained in:
Alex Auvolat 2021-02-19 16:44:06 +01:00
parent 02d512f3fd
commit 55a2a636ca
3 changed files with 157 additions and 67 deletions
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26
src/api/api_server.rs
View file

@ -199,30 +199,8 @@ async fn handler_inner(garage: Arc<Garage>, req: Request<Body>) -> Result<Respon
}
&Method::GET => {
// ListObjects query
let delimiter = params.get("delimiter").map(|x| x.as_str()).unwrap_or(&"");
let max_keys = params
.get("max-keys")
.map(|x| {
x.parse::<usize>()
.ok_or_bad_request("Invalid value for max-keys")
})
.unwrap_or(Ok(1000))?;
let prefix = params.get("prefix").map(|x| x.as_str()).unwrap_or(&"");
let urlencode_resp = params
.get("encoding-type")
.map(|x| x == "url")
.unwrap_or(false);
let marker = params.get("marker").map(String::as_str);
Ok(handle_list(
garage,
bucket,
delimiter,
max_keys,
prefix,
marker,
urlencode_resp,
)
.await?)
let q = parse_list_objects_query(bucket, &params)?;
Ok(handle_list(garage, &q).await?)
}
&Method::POST => {
if params.contains_key(&"delete".to_string()) {

8
src/api/error.rs
View file

@ -24,7 +24,13 @@ pub enum Error {
// Category: bad request
#[error(display = "Invalid UTF-8: {}", _0)]
InvalidUTF8(#[error(source)] std::str::Utf8Error),
InvalidUTF8Str(#[error(source)] std::str::Utf8Error),
#[error(display = "Invalid UTF-8: {}", _0)]
InvalidUTF8String(#[error(source)] std::string::FromUtf8Error),
#[error(display = "Invalid base64: {}", _0)]
InvalidBase64(#[error(source)] base64::DecodeError),
#[error(display = "Invalid XML: {}", _0)]
InvalidXML(#[error(source)] roxmltree::Error),

190
src/api/s3_list.rs
View file

@ -1,11 +1,11 @@
use std::collections::{BTreeMap, BTreeSet};
use std::collections::{BTreeMap, BTreeSet, HashMap};
use std::fmt::Write;
use std::sync::Arc;
use chrono::{DateTime, NaiveDateTime, SecondsFormat, Utc};
use hyper::{Body, Response};
use garage_util::error::Error;
use garage_util::error::Error as GarageError;
use garage_model::garage::Garage;
use garage_model::object_table::*;
@ -13,6 +13,20 @@ use garage_model::object_table::*;
use garage_table::DeletedFilter;
use crate::encoding::*;
use crate::error::*;
#[derive(Debug)]
pub struct ListObjectsQuery {
pub is_v2: bool,
pub bucket: String,
pub delimiter: Option<String>,
pub max_keys: usize,
pub prefix: String,
pub marker: Option<String>,
pub continuation_token: Option<String>,
pub start_after: Option<String>,
pub urlencode_resp: bool,
}
#[derive(Debug)]
struct ListResultInfo {
@ -21,55 +35,92 @@ struct ListResultInfo {
etag: String,
}
pub fn parse_list_objects_query(
bucket: &str,
params: &HashMap<String, String>,
) -> Result<ListObjectsQuery, Error> {
Ok(ListObjectsQuery {
is_v2: params.get("list-type").map(|x| x == "2").unwrap_or(false),
bucket: bucket.to_string(),
delimiter: params.get("delimiter").cloned(),
max_keys: params
.get("max-keys")
.map(|x| {
x.parse::<usize>()
.ok_or_bad_request("Invalid value for max-keys")
})
.unwrap_or(Ok(1000))?,
prefix: params.get("prefix").cloned().unwrap_or(String::new()),
marker: params.get("marker").cloned(),
continuation_token: params.get("continuation-token").cloned(),
start_after: params.get("start-after").cloned(),
urlencode_resp: params
.get("encoding-type")
.map(|x| x == "url")
.unwrap_or(false),
})
}
pub async fn handle_list(
garage: Arc<Garage>,
bucket: &str,
delimiter: &str,
max_keys: usize,
prefix: &str,
marker: Option<&str>,
urlencode_resp: bool,
query: &ListObjectsQuery,
) -> Result<Response<Body>, Error> {
let mut result_keys = BTreeMap::<String, ListResultInfo>::new();
let mut result_common_prefixes = BTreeSet::<String>::new();
let mut next_chunk_start = marker.unwrap_or(prefix).to_string();
let mut next_chunk_start = if query.is_v2 {
if let Some(ct) = &query.continuation_token {
String::from_utf8(base64::decode(ct.as_bytes())?)?
} else {
query.start_after.clone().unwrap_or(query.prefix.clone())
}
} else {
query.marker.clone().unwrap_or(query.prefix.clone())
};
debug!("List request: `{}` {} `{}`", delimiter, max_keys, prefix);
debug!(
"List request: `{:?}` {} `{}`",
query.delimiter, query.max_keys, query.prefix
);
let truncated;
'query_loop: loop {
let objects = garage
.object_table
.get_range(
&bucket.to_string(),
&query.bucket,
Some(next_chunk_start.clone()),
Some(DeletedFilter::NotDeleted),
max_keys + 1,
query.max_keys + 1,
)
.await?;
debug!(
"List: get range {} (max {}), results: {}",
next_chunk_start,
max_keys + 1,
query.max_keys + 1,
objects.len()
);
for object in objects.iter() {
if !object.key.starts_with(prefix) {
if !object.key.starts_with(&query.prefix) {
truncated = None;
break 'query_loop;
}
if query.is_v2 && query.start_after.as_ref() == Some(&object.key) {
continue;
}
if let Some(version) = object.versions().iter().find(|x| x.is_data()) {
if result_keys.len() + result_common_prefixes.len() >= max_keys {
if result_keys.len() + result_common_prefixes.len() >= query.max_keys {
truncated = Some(object.key.to_string());
break 'query_loop;
}
let common_prefix = if delimiter.len() > 0 {
let relative_key = &object.key[prefix.len()..];
let common_prefix = if let Some(delimiter) = &query.delimiter {
let relative_key = &object.key[query.prefix.len()..];
relative_key
.find(delimiter)
.map(|i| &object.key[..prefix.len() + i + delimiter.len()])
.map(|i| &object.key[..query.prefix.len() + i + delimiter.len()])
} else {
None
};
@ -90,14 +141,17 @@ pub async fn handle_list(
etag: meta.etag.to_string(),
},
Some(_lri) => {
return Err(Error::Message(format!("Duplicate key?? {}", object.key)))
return Err(Error::InternalError(GarageError::Message(format!(
"Duplicate key?? {}",
object.key
))))
}
};
result_keys.insert(object.key.clone(), info);
};
}
}
if objects.len() < max_keys + 1 {
if objects.len() < query.max_keys + 1 {
truncated = None;
break 'query_loop;
}
@ -113,22 +167,75 @@ pub async fn handle_list(
r#"<ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">"#
)
.unwrap();
writeln!(&mut xml, "\t<Name>{}</Name>", bucket).unwrap();
writeln!(&mut xml, "\t<Prefix>{}</Prefix>", prefix).unwrap();
if let Some(mkr) = marker {
writeln!(&mut xml, "\t<Marker>{}</Marker>", mkr).unwrap();
writeln!(&mut xml, "\t<Name>{}</Name>", query.bucket).unwrap();
// TODO: in V1, is this supposed to be urlencoded when encoding-type is URL??
writeln!(
&mut xml,
"\t<Prefix>{}</Prefix>",
xml_encode_key(&query.prefix, query.urlencode_resp),
)
.unwrap();
if let Some(delim) = &query.delimiter {
// TODO: in V1, is this supposed to be urlencoded when encoding-type is URL??
writeln!(
&mut xml,
"\t<Delimiter>{}</Delimiter>",
xml_encode_key(delim, query.urlencode_resp),
)
.unwrap();
}
writeln!(&mut xml, "\t<KeyCount>{}</KeyCount>", result_keys.len()).unwrap();
writeln!(&mut xml, "\t<MaxKeys>{}</MaxKeys>", max_keys).unwrap();
writeln!(&mut xml, "\t<MaxKeys>{}</MaxKeys>", query.max_keys).unwrap();
if query.urlencode_resp {
writeln!(&mut xml, "\t<EncodingType>url</EncodingType>").unwrap();
}
writeln!(
&mut xml,
"\t<KeyCount>{}</KeyCount>",
result_keys.len() + result_common_prefixes.len()
)
.unwrap();
writeln!(
&mut xml,
"\t<IsTruncated>{}</IsTruncated>",
truncated.is_some()
)
.unwrap();
if let Some(next_marker) = truncated {
writeln!(&mut xml, "\t<NextMarker>{}</NextMarker>", next_marker).unwrap();
if query.is_v2 {
if let Some(ct) = &query.continuation_token {
writeln!(&mut xml, "\t<ContinuationToken>{}</ContinuationToken>", ct).unwrap();
}
if let Some(sa) = &query.start_after {
writeln!(
&mut xml,
"\t<StartAfter>{}</StartAfter>",
xml_encode_key(sa, query.urlencode_resp)
)
.unwrap();
}
if let Some(nct) = truncated {
writeln!(
&mut xml,
"\t<NextContinuationToken>{}</NextContinuationToken>",
base64::encode(nct.as_bytes())
)
.unwrap();
}
} else {
// TODO: are these supposed to be urlencoded when encoding-type is URL??
if let Some(mkr) = &query.marker {
writeln!(&mut xml, "\t<Marker>{}</Marker>", xml_encode_key(mkr, query.urlencode_resp)).unwrap();
}
if let Some(next_marker) = truncated {
writeln!(&mut xml, "\t<NextMarker>{}</NextMarker>", xml_encode_key(&next_marker, query.urlencode_resp)).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);
@ -137,8 +244,7 @@ pub async fn handle_list(
writeln!(
&mut xml,
"\t\t<Key>{}</Key>",
xml_escape(key),
//xml_encode_key(key, urlencode_resp) // doesn't work with nextcloud, wtf
xml_encode_key(key, query.urlencode_resp),
)
.unwrap();
writeln!(&mut xml, "\t\t<LastModified>{}</LastModified>", last_modif).unwrap();
@ -149,19 +255,19 @@ pub async fn handle_list(
writeln!(&mut xml, "\t\t<StorageClass>STANDARD</StorageClass>").unwrap();
writeln!(&mut xml, "\t</Contents>").unwrap();
}
if result_common_prefixes.len() > 0 {
for pfx in result_common_prefixes.iter() {
writeln!(&mut xml, "\t<CommonPrefixes>").unwrap();
writeln!(
&mut xml,
"\t\t<Prefix>{}</Prefix>",
xml_escape(pfx),
//xml_encode_key(pfx, urlencode_resp)
)
.unwrap();
writeln!(&mut xml, "\t</CommonPrefixes>").unwrap();
}
for pfx in result_common_prefixes.iter() {
writeln!(&mut xml, "\t<CommonPrefixes>").unwrap();
//TODO: in V1, are these urlencoded when urlencode_resp is true ?? (proably)
writeln!(
&mut xml,
"\t\t<Prefix>{}</Prefix>",
xml_encode_key(pfx, query.urlencode_resp),
)
.unwrap();
writeln!(&mut xml, "\t</CommonPrefixes>").unwrap();
}
writeln!(&mut xml, "</ListBucketResult>").unwrap();
debug!("{}", xml);