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Some basic S3 functionnality

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This commit is contained in:
Alex Auvolat 2020-04-24 18:47:11 +00:00
parent f2e05986c4
commit 91b2d1fcc1
6 changed files with 482 additions and 305 deletions
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336
src/api/api_server.rs
View file

@ -1,30 +1,25 @@
use std::collections::VecDeque;
use std::collections::HashMap;
use std::net::SocketAddr;
use std::sync::Arc;
use std::time::{Duration, UNIX_EPOCH};
use futures::future::Future;
use futures::stream::*;
use hyper::body::{Bytes, HttpBody};
use hyper::server::conn::AddrStream;
use hyper::service::{make_service_fn, service_fn};
use hyper::{Body, Method, Request, Response, Server, StatusCode};
use hyper::{Body, Method, Request, Response, Server};
use garage_util::data::*;
use garage_util::error::Error;
use garage_table::EmptyKey;
use garage_core::block::INLINE_THRESHOLD;
use garage_core::block_ref_table::*;
use garage_core::garage::Garage;
use garage_core::object_table::*;
use garage_core::version_table::*;
use crate::http_util::*;
use crate::signature::check_signature;
type BodyType = Box<dyn HttpBody<Data = Bytes, Error = Error> + Send + Unpin>;
use crate::s3_get::{handle_get, handle_head};
use crate::s3_list::handle_list;
use crate::s3_put::{handle_delete, handle_put};
pub type BodyType = Box<dyn HttpBody<Data = Bytes, Error = Error> + Send + Unpin>;
pub async fn run_api_server(
garage: Arc<Garage>,
@ -128,298 +123,41 @@ async fn handler_inner(
_ => Err(Error::BadRequest(format!("Invalid method"))),
}
} else {
// TODO: listing buckets
Err(Error::Forbidden("Unimplemented".into()))
}
}
async fn handle_put(
garage: Arc<Garage>,
mime_type: &str,
bucket: &str,
key: &str,
body: Body,
) -> Result<UUID, Error> {
let version_uuid = gen_uuid();
let mut chunker = BodyChunker::new(body, garage.config.block_size);
let first_block = match chunker.next().await? {
Some(x) => x,
None => return Err(Error::BadRequest(format!("Empty body"))),
};
let mut object_version = ObjectVersion {
uuid: version_uuid,
timestamp: now_msec(),
mime_type: mime_type.to_string(),
size: first_block.len() as u64,
is_complete: false,
data: ObjectVersionData::DeleteMarker,
};
if first_block.len() < INLINE_THRESHOLD {
object_version.data = ObjectVersionData::Inline(first_block);
object_version.is_complete = true;
let object = Object::new(bucket.into(), key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
return Ok(version_uuid);
}
let version = Version::new(version_uuid, bucket.into(), key.into(), false, vec![]);
let first_block_hash = hash(&first_block[..]);
object_version.data = ObjectVersionData::FirstBlock(first_block_hash);
let object = Object::new(bucket.into(), key.into(), vec![object_version.clone()]);
garage.object_table.insert(&object).await?;
let mut next_offset = first_block.len();
let mut put_curr_version_block = put_block_meta(garage.clone(), &version, 0, first_block_hash);
let mut put_curr_block = garage
.block_manager
.rpc_put_block(first_block_hash, first_block);
loop {
let (_, _, next_block) =
futures::try_join!(put_curr_block, put_curr_version_block, chunker.next())?;
if let Some(block) = next_block {
let block_hash = hash(&block[..]);
let block_len = block.len();
put_curr_version_block =
put_block_meta(garage.clone(), &version, next_offset as u64, block_hash);
put_curr_block = garage.block_manager.rpc_put_block(block_hash, block);
next_offset += block_len;
} else {
break;
match req.method() {
&Method::PUT | &Method::DELETE => Err(Error::Forbidden(
"Cannot create or delete buckets using S3 api, please talk to Garage directly"
.into(),
)),
&Method::GET => {
let mut params = HashMap::new();
if let Some(query) = req.uri().query() {
let query_pairs = url::form_urlencoded::parse(query.as_bytes());
for (key, val) in query_pairs {
params.insert(key.to_lowercase(), val.to_string());
}
}
// TODO: if at any step we have an error, we should undo everything we did
object_version.is_complete = true;
object_version.size = next_offset as u64;
let object = Object::new(bucket.into(), key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
Ok(version_uuid)
}
async fn put_block_meta(
garage: Arc<Garage>,
version: &Version,
offset: u64,
hash: Hash,
) -> Result<(), Error> {
// TODO: don't clone, restart from empty block list ??
let mut version = version.clone();
version.add_block(VersionBlock { offset, hash }).unwrap();
let block_ref = BlockRef {
block: hash,
version: version.uuid,
deleted: false,
};
futures::try_join!(
garage.version_table.insert(&version),
garage.block_ref_table.insert(&block_ref),
)?;
Ok(())
}
struct BodyChunker {
body: Body,
read_all: bool,
block_size: usize,
buf: VecDeque<u8>,
}
impl BodyChunker {
fn new(body: Body, block_size: usize) -> Self {
Self {
body,
read_all: false,
block_size,
buf: VecDeque::new(),
}
}
async fn next(&mut self) -> Result<Option<Vec<u8>>, Error> {
while !self.read_all && self.buf.len() < self.block_size {
if let Some(block) = self.body.next().await {
let bytes = block?;
trace!("Body next: {} bytes", bytes.len());
self.buf.extend(&bytes[..]);
} else {
self.read_all = true;
}
}
if self.buf.len() == 0 {
Ok(None)
} else if self.buf.len() <= self.block_size {
let block = self.buf.drain(..).collect::<Vec<u8>>();
Ok(Some(block))
} else {
let block = self.buf.drain(..self.block_size).collect::<Vec<u8>>();
Ok(Some(block))
}
}
}
async fn handle_delete(garage: Arc<Garage>, bucket: &str, key: &str) -> Result<UUID, Error> {
let exists = match garage
.object_table
.get(&bucket.to_string(), &key.to_string())
.await?
{
None => false,
Some(o) => {
let mut has_active_version = false;
for v in o.versions().iter() {
if v.data != ObjectVersionData::DeleteMarker {
has_active_version = true;
break;
}
}
has_active_version
}
};
if !exists {
// No need to delete
return Ok([0u8; 32].into());
}
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,
is_complete: true,
data: ObjectVersionData::DeleteMarker,
}],
);
garage.object_table.insert(&object).await?;
return Ok(version_uuid);
}
fn object_headers(version: &ObjectVersion) -> http::response::Builder {
let date = UNIX_EPOCH + Duration::from_millis(version.timestamp);
let date_str = httpdate::fmt_http_date(date);
Response::builder()
.header("Content-Type", version.mime_type.to_string())
.header("Content-Length", format!("{}", version.size))
.header("Last-Modified", date_str)
}
async fn handle_head(
garage: Arc<Garage>,
bucket: &str,
key: &str,
) -> Result<Response<BodyType>, Error> {
let object = match garage
.object_table
.get(&bucket.to_string(), &key.to_string())
.await?
{
None => return Err(Error::NotFound),
Some(o) => o,
};
let version = match object
.versions()
if ["delimiter", "prefix"]
.iter()
.rev()
.filter(|v| v.is_complete && v.data != ObjectVersionData::DeleteMarker)
.next()
.all(|x| params.contains_key(&x.to_string()))
{
Some(v) => v,
None => return Err(Error::NotFound),
};
let body: BodyType = Box::new(BytesBody::from(vec![]));
let response = object_headers(&version)
.status(StatusCode::OK)
.body(body)
.unwrap();
Ok(response)
}
async fn handle_get(
garage: Arc<Garage>,
bucket: &str,
key: &str,
) -> Result<Response<BodyType>, Error> {
let object = match garage
.object_table
.get(&bucket.to_string(), &key.to_string())
.await?
{
None => return Err(Error::NotFound),
Some(o) => o,
};
let last_v = match object
.versions()
.iter()
.rev()
.filter(|v| v.is_complete)
.next()
{
Some(v) => v,
None => return Err(Error::NotFound),
};
let resp_builder = object_headers(&last_v).status(StatusCode::OK);
match &last_v.data {
ObjectVersionData::DeleteMarker => Err(Error::NotFound),
ObjectVersionData::Inline(bytes) => {
let body: BodyType = Box::new(BytesBody::from(bytes.to_vec()));
Ok(resp_builder.body(body)?)
}
ObjectVersionData::FirstBlock(first_block_hash) => {
let read_first_block = garage.block_manager.rpc_get_block(&first_block_hash);
let get_next_blocks = garage.version_table.get(&last_v.uuid, &EmptyKey);
let (first_block, version) = futures::try_join!(read_first_block, get_next_blocks)?;
let version = match version {
Some(v) => v,
None => return Err(Error::NotFound),
};
let mut blocks = version
.blocks()
.iter()
.map(|vb| (vb.hash, None))
.collect::<Vec<_>>();
blocks[0].1 = Some(first_block);
let body_stream = futures::stream::iter(blocks)
.map(move |(hash, data_opt)| {
let garage = garage.clone();
async move {
if let Some(data) = data_opt {
Ok(Bytes::from(data))
} else {
garage
.block_manager
.rpc_get_block(&hash)
.await
.map(Bytes::from)
}
}
let delimiter = params.get("delimiter").unwrap();
let max_keys = params
.get("max-keys")
.map(|x| {
x.parse::<usize>().map_err(|e| {
Error::BadRequest(format!("Invalid value for max-keys: {}", e))
})
.buffered(2);
let body: BodyType = Box::new(StreamBody::new(Box::pin(body_stream)));
Ok(resp_builder.body(body)?)
})
.unwrap_or(Ok(1000))?;
let prefix = params.get("prefix").unwrap();
Ok(handle_list(garage, bucket, delimiter, max_keys, prefix).await?)
} else {
Err(Error::BadRequest(format!(
"Not a list call, so what is it?"
)))
}
}
_ => Err(Error::BadRequest(format!("Invalid method"))),
}
}
}

4
src/api/lib.rs
View file

@ -4,3 +4,7 @@ extern crate log;
pub mod api_server;
pub mod http_util;
pub mod signature;
pub mod s3_get;
pub mod s3_list;
pub mod s3_put;

131
src/api/s3_get.rs Normal file
View file

@ -0,0 +1,131 @@
use std::sync::Arc;
use std::time::{Duration, UNIX_EPOCH};
use futures::stream::*;
use hyper::body::Bytes;
use hyper::{Response, StatusCode};
use garage_util::error::Error;
use garage_table::EmptyKey;
use garage_core::garage::Garage;
use garage_core::object_table::*;
use crate::api_server::BodyType;
use crate::http_util::*;
fn object_headers(version: &ObjectVersion) -> http::response::Builder {
let date = UNIX_EPOCH + Duration::from_millis(version.timestamp);
let date_str = httpdate::fmt_http_date(date);
Response::builder()
.header("Content-Type", version.mime_type.to_string())
.header("Content-Length", format!("{}", version.size))
.header("Last-Modified", date_str)
}
pub async fn handle_head(
garage: Arc<Garage>,
bucket: &str,
key: &str,
) -> Result<Response<BodyType>, Error> {
let object = match garage
.object_table
.get(&bucket.to_string(), &key.to_string())
.await?
{
None => return Err(Error::NotFound),
Some(o) => o,
};
let version = match object
.versions()
.iter()
.rev()
.filter(|v| v.is_complete && v.data != ObjectVersionData::DeleteMarker)
.next()
{
Some(v) => v,
None => return Err(Error::NotFound),
};
let body: BodyType = Box::new(BytesBody::from(vec![]));
let response = object_headers(&version)
.status(StatusCode::OK)
.body(body)
.unwrap();
Ok(response)
}
pub async fn handle_get(
garage: Arc<Garage>,
bucket: &str,
key: &str,
) -> Result<Response<BodyType>, Error> {
let object = match garage
.object_table
.get(&bucket.to_string(), &key.to_string())
.await?
{
None => return Err(Error::NotFound),
Some(o) => o,
};
let last_v = match object
.versions()
.iter()
.rev()
.filter(|v| v.is_complete)
.next()
{
Some(v) => v,
None => return Err(Error::NotFound),
};
let resp_builder = object_headers(&last_v).status(StatusCode::OK);
match &last_v.data {
ObjectVersionData::DeleteMarker => Err(Error::NotFound),
ObjectVersionData::Inline(bytes) => {
let body: BodyType = Box::new(BytesBody::from(bytes.to_vec()));
Ok(resp_builder.body(body)?)
}
ObjectVersionData::FirstBlock(first_block_hash) => {
let read_first_block = garage.block_manager.rpc_get_block(&first_block_hash);
let get_next_blocks = garage.version_table.get(&last_v.uuid, &EmptyKey);
let (first_block, version) = futures::try_join!(read_first_block, get_next_blocks)?;
let version = match version {
Some(v) => v,
None => return Err(Error::NotFound),
};
let mut blocks = version
.blocks()
.iter()
.map(|vb| (vb.hash, None))
.collect::<Vec<_>>();
blocks[0].1 = Some(first_block);
let body_stream = futures::stream::iter(blocks)
.map(move |(hash, data_opt)| {
let garage = garage.clone();
async move {
if let Some(data) = data_opt {
Ok(Bytes::from(data))
} else {
garage
.block_manager
.rpc_get_block(&hash)
.await
.map(Bytes::from)
}
}
})
.buffered(2);
let body: BodyType = Box::new(StreamBody::new(Box::pin(body_stream)));
Ok(resp_builder.body(body)?)
}
}
}

112
src/api/s3_list.rs Normal file
View file

@ -0,0 +1,112 @@
use std::collections::BTreeMap;
use std::fmt::Write;
use std::sync::Arc;
use chrono::{DateTime, NaiveDateTime, Utc, SecondsFormat};
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 = BTreeMap::<String, ListResultInfo>::new();
let mut truncated = true;
let mut next_chunk_start = prefix.to_string();
println!("List request: `{}` {} `{}`", delimiter, max_keys, prefix);
while result.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)
{
let relative_key = match object.key.starts_with(prefix) {
true => &object.key[prefix.len()..],
false => {
truncated = false;
break;
}
};
let delimited_key = match relative_key.find(delimiter) {
Some(i) => relative_key.split_at(i).1,
None => &relative_key,
};
let delimited_key = delimited_key.to_string();
let new_info = match result.get(&delimited_key) {
None => ListResultInfo {
last_modified: version.timestamp,
size: version.size,
},
Some(lri) => ListResultInfo {
last_modified: std::cmp::max(version.timestamp, lri.last_modified),
size: 0,
},
};
println!("Entry: {} {:?}", delimited_key, new_info);
result.insert(delimited_key, new_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.len()).unwrap();
writeln!(&mut xml, "\t<MaxKeys>{}</MaxKeys>", max_keys).unwrap();
writeln!(&mut xml, "\t<IsTruncated>{}</IsTruncated>", truncated).unwrap();
for (key, info) in result.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>", 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();
}
writeln!(&mut xml, "</ListBucketResult>").unwrap();
println!("{}", xml);
Ok(Response::new(Box::new(BytesBody::from(xml.into_bytes()))))
}

190
src/api/s3_put.rs Normal file
View file

@ -0,0 +1,190 @@
use std::collections::VecDeque;
use std::sync::Arc;
use futures::stream::*;
use hyper::Body;
use garage_util::data::*;
use garage_util::error::Error;
use garage_core::block::INLINE_THRESHOLD;
use garage_core::block_ref_table::*;
use garage_core::garage::Garage;
use garage_core::object_table::*;
use garage_core::version_table::*;
pub async fn handle_put(
garage: Arc<Garage>,
mime_type: &str,
bucket: &str,
key: &str,
body: Body,
) -> Result<UUID, Error> {
let version_uuid = gen_uuid();
let mut chunker = BodyChunker::new(body, garage.config.block_size);
let first_block = match chunker.next().await? {
Some(x) => x,
None => return Err(Error::BadRequest(format!("Empty body"))),
};
let mut object_version = ObjectVersion {
uuid: version_uuid,
timestamp: now_msec(),
mime_type: mime_type.to_string(),
size: first_block.len() as u64,
is_complete: false,
data: ObjectVersionData::DeleteMarker,
};
if first_block.len() < INLINE_THRESHOLD {
object_version.data = ObjectVersionData::Inline(first_block);
object_version.is_complete = true;
let object = Object::new(bucket.into(), key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
return Ok(version_uuid);
}
let version = Version::new(version_uuid, bucket.into(), key.into(), false, vec![]);
let first_block_hash = hash(&first_block[..]);
object_version.data = ObjectVersionData::FirstBlock(first_block_hash);
let object = Object::new(bucket.into(), key.into(), vec![object_version.clone()]);
garage.object_table.insert(&object).await?;
let mut next_offset = first_block.len();
let mut put_curr_version_block = put_block_meta(garage.clone(), &version, 0, first_block_hash);
let mut put_curr_block = garage
.block_manager
.rpc_put_block(first_block_hash, first_block);
loop {
let (_, _, next_block) =
futures::try_join!(put_curr_block, put_curr_version_block, chunker.next())?;
if let Some(block) = next_block {
let block_hash = hash(&block[..]);
let block_len = block.len();
put_curr_version_block =
put_block_meta(garage.clone(), &version, next_offset as u64, block_hash);
put_curr_block = garage.block_manager.rpc_put_block(block_hash, block);
next_offset += block_len;
} else {
break;
}
}
// TODO: if at any step we have an error, we should undo everything we did
object_version.is_complete = true;
object_version.size = next_offset as u64;
let object = Object::new(bucket.into(), key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
Ok(version_uuid)
}
async fn put_block_meta(
garage: Arc<Garage>,
version: &Version,
offset: u64,
hash: Hash,
) -> Result<(), Error> {
// TODO: don't clone, restart from empty block list ??
let mut version = version.clone();
version.add_block(VersionBlock { offset, hash }).unwrap();
let block_ref = BlockRef {
block: hash,
version: version.uuid,
deleted: false,
};
futures::try_join!(
garage.version_table.insert(&version),
garage.block_ref_table.insert(&block_ref),
)?;
Ok(())
}
struct BodyChunker {
body: Body,
read_all: bool,
block_size: usize,
buf: VecDeque<u8>,
}
impl BodyChunker {
fn new(body: Body, block_size: usize) -> Self {
Self {
body,
read_all: false,
block_size,
buf: VecDeque::new(),
}
}
async fn next(&mut self) -> Result<Option<Vec<u8>>, Error> {
while !self.read_all && self.buf.len() < self.block_size {
if let Some(block) = self.body.next().await {
let bytes = block?;
trace!("Body next: {} bytes", bytes.len());
self.buf.extend(&bytes[..]);
} else {
self.read_all = true;
}
}
if self.buf.len() == 0 {
Ok(None)
} else if self.buf.len() <= self.block_size {
let block = self.buf.drain(..).collect::<Vec<u8>>();
Ok(Some(block))
} else {
let block = self.buf.drain(..self.block_size).collect::<Vec<u8>>();
Ok(Some(block))
}
}
}
pub async fn handle_delete(garage: Arc<Garage>, bucket: &str, key: &str) -> Result<UUID, Error> {
let exists = match garage
.object_table
.get(&bucket.to_string(), &key.to_string())
.await?
{
None => false,
Some(o) => {
let mut has_active_version = false;
for v in o.versions().iter() {
if v.data != ObjectVersionData::DeleteMarker {
has_active_version = true;
break;
}
}
has_active_version
}
};
if !exists {
// No need to delete
return Ok([0u8; 32].into());
}
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,
is_complete: true,
data: ObjectVersionData::DeleteMarker,
}],
);
garage.object_table.insert(&object).await?;
return Ok(version_uuid);
}

8
src/core/object_table.rs
View file

@ -158,8 +158,10 @@ impl TableSchema for ObjectTable {
Ok(())
}
fn matches_filter(_entry: &Self::E, _filter: &Self::Filter) -> bool {
// TODO
true
fn matches_filter(entry: &Self::E, _filter: &Self::Filter) -> bool {
entry
.versions
.iter()
.any(|x| x.is_complete && x.data != ObjectVersionData::DeleteMarker)
}
}