forked from Deuxfleurs/garage
256 lines
6.5 KiB
Rust
256 lines
6.5 KiB
Rust
use std::sync::Arc;
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use std::time::{Duration, UNIX_EPOCH};
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use futures::stream::*;
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use hyper::body::Bytes;
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use hyper::{Body, Request, Response, StatusCode};
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use garage_util::error::Error;
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use garage_table::EmptyKey;
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use garage_model::garage::Garage;
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use garage_model::object_table::*;
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fn object_headers(
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version: &ObjectVersion,
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version_meta: &ObjectVersionMeta,
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) -> http::response::Builder {
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let date = UNIX_EPOCH + Duration::from_millis(version.timestamp);
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let date_str = httpdate::fmt_http_date(date);
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let mut resp = Response::builder()
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.header(
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"Content-Type",
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version_meta.headers.content_type.to_string(),
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)
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.header("Content-Length", format!("{}", version_meta.size))
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.header("ETag", version_meta.etag.to_string())
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.header("Last-Modified", date_str)
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.header("Accept-Ranges", format!("bytes"));
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for (k, v) in version_meta.headers.other.iter() {
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resp = resp.header(k, v.to_string());
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}
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resp
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}
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pub async fn handle_head(
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garage: Arc<Garage>,
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bucket: &str,
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key: &str,
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) -> Result<Response<Body>, Error> {
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let object = match garage
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.object_table
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.get(&bucket.to_string(), &key.to_string())
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.await?
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{
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None => return Err(Error::NotFound),
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Some(o) => o,
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};
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let version = match object
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.versions()
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.iter()
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.rev()
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.filter(|v| v.is_data())
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.next()
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{
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Some(v) => v,
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None => return Err(Error::NotFound),
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};
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let version_meta = match &version.state {
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ObjectVersionState::Complete(ObjectVersionData::Inline(meta, _)) => meta,
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ObjectVersionState::Complete(ObjectVersionData::FirstBlock(meta, _)) => meta,
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_ => unreachable!(),
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};
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let body: Body = Body::from(vec![]);
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let response = object_headers(&version, version_meta)
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.status(StatusCode::OK)
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.body(body)
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.unwrap();
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Ok(response)
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}
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pub async fn handle_get(
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garage: Arc<Garage>,
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req: &Request<Body>,
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bucket: &str,
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key: &str,
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) -> Result<Response<Body>, Error> {
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let object = match garage
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.object_table
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.get(&bucket.to_string(), &key.to_string())
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.await?
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{
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None => return Err(Error::NotFound),
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Some(o) => o,
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};
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let last_v = match object
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.versions()
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.iter()
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.rev()
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.filter(|v| v.is_complete())
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.next()
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{
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Some(v) => v,
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None => return Err(Error::NotFound),
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};
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let last_v_data = match &last_v.state {
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ObjectVersionState::Complete(x) => x,
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_ => unreachable!(),
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};
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let last_v_meta = match last_v_data {
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ObjectVersionData::DeleteMarker => return Err(Error::NotFound),
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ObjectVersionData::Inline(meta, _) => meta,
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ObjectVersionData::FirstBlock(meta, _) => meta,
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};
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let range = match req.headers().get("range") {
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Some(range) => {
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let range_str = range
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.to_str()
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.map_err(|e| Error::BadRequest(format!("Invalid range header: {}", e)))?;
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let mut ranges = http_range::HttpRange::parse(range_str, last_v_meta.size)
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.map_err(|_e| Error::BadRequest(format!("Invalid range")))?;
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if ranges.len() > 1 {
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return Err(Error::BadRequest(format!("Multiple ranges not supported")));
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} else {
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ranges.pop()
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}
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}
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None => None,
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};
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if let Some(range) = range {
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return handle_get_range(
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garage,
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last_v,
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last_v_data,
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last_v_meta,
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range.start,
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range.start + range.length,
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)
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.await;
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}
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let resp_builder = object_headers(&last_v, last_v_meta).status(StatusCode::OK);
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match &last_v_data {
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ObjectVersionData::DeleteMarker => unreachable!(),
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ObjectVersionData::Inline(_, bytes) => {
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let body: Body = Body::from(bytes.to_vec());
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Ok(resp_builder.body(body)?)
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}
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ObjectVersionData::FirstBlock(_, first_block_hash) => {
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let read_first_block = garage.block_manager.rpc_get_block(&first_block_hash);
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let get_next_blocks = garage.version_table.get(&last_v.uuid, &EmptyKey);
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let (first_block, version) = futures::try_join!(read_first_block, get_next_blocks)?;
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let version = match version {
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Some(v) => v,
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None => return Err(Error::NotFound),
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};
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let mut blocks = version
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.blocks()
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.iter()
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.map(|vb| (vb.hash, None))
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.collect::<Vec<_>>();
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blocks[0].1 = Some(first_block);
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let body_stream = futures::stream::iter(blocks)
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.map(move |(hash, data_opt)| {
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let garage = garage.clone();
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async move {
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if let Some(data) = data_opt {
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Ok(Bytes::from(data))
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} else {
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garage
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.block_manager
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.rpc_get_block(&hash)
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.await
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.map(Bytes::from)
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}
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}
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})
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.buffered(2);
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//let body: Body = Box::new(StreamBody::new(Box::pin(body_stream)));
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let body = hyper::body::Body::wrap_stream(body_stream);
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Ok(resp_builder.body(body)?)
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}
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}
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}
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pub async fn handle_get_range(
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garage: Arc<Garage>,
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version: &ObjectVersion,
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version_data: &ObjectVersionData,
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version_meta: &ObjectVersionMeta,
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begin: u64,
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end: u64,
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) -> Result<Response<Body>, Error> {
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if end > version_meta.size {
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return Err(Error::BadRequest(format!("Range not included in file")));
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}
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let resp_builder = object_headers(version, version_meta)
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.header(
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"Content-Range",
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format!("bytes {}-{}/{}", begin, end, version_meta.size),
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)
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.status(StatusCode::PARTIAL_CONTENT);
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match &version_data {
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ObjectVersionData::DeleteMarker => unreachable!(),
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ObjectVersionData::Inline(_meta, bytes) => {
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if end as usize <= bytes.len() {
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let body: Body = Body::from(bytes[begin as usize..end as usize].to_vec());
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Ok(resp_builder.body(body)?)
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} else {
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Err(Error::Message(format!("Internal error: requested range not present in inline bytes when it should have been")))
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}
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}
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ObjectVersionData::FirstBlock(_meta, _first_block_hash) => {
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let version = garage.version_table.get(&version.uuid, &EmptyKey).await?;
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let version = match version {
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Some(v) => v,
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None => return Err(Error::NotFound),
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};
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let blocks = version
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.blocks()
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.iter()
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.cloned()
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.filter(|block| block.offset + block.size > begin && block.offset < end)
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.collect::<Vec<_>>();
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let body_stream = futures::stream::iter(blocks)
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.map(move |block| {
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let garage = garage.clone();
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async move {
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let data = garage.block_manager.rpc_get_block(&block.hash).await?;
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let start_in_block = if block.offset > begin {
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0
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} else {
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begin - block.offset
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};
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let end_in_block = if block.offset + block.size < end {
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block.size
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} else {
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end - block.offset
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};
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Result::<Bytes, Error>::Ok(Bytes::from(
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data[start_in_block as usize..end_in_block as usize].to_vec(),
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))
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}
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})
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.buffered(2);
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//let body: Body = Box::new(StreamBody::new(Box::pin(body_stream)));
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let body = hyper::body::Body::wrap_stream(body_stream);
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Ok(resp_builder.body(body)?)
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}
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}
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}
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