469 lines
12 KiB
Rust
469 lines
12 KiB
Rust
use std::collections::HashMap;
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use std::sync::Arc;
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use futures::{prelude::*, TryStreamExt};
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use hyper::body::Body;
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use hyper::{body::HttpBody, Request, Response};
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use md5::{Digest as Md5Digest, Md5};
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use garage_table::*;
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use garage_util::async_hash::*;
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use garage_util::data::*;
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use garage_model::bucket_table::Bucket;
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use garage_model::garage::Garage;
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use garage_model::s3::block_ref_table::*;
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use garage_model::s3::mpu_table::*;
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use garage_model::s3::object_table::*;
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use garage_model::s3::version_table::*;
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use crate::s3::error::*;
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use crate::s3::put::*;
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use crate::s3::xml as s3_xml;
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use crate::signature::verify_signed_content;
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// ----
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pub async fn handle_create_multipart_upload(
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garage: Arc<Garage>,
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req: &Request<Body>,
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bucket_name: &str,
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bucket_id: Uuid,
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key: &String,
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) -> Result<Response<Body>, Error> {
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let existing_object = garage.object_table.get(&bucket_id, &key).await?;
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let upload_id = gen_uuid();
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let timestamp = next_timestamp(existing_object.as_ref());
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let headers = get_headers(req.headers())?;
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// Create object in object table
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let object_version = ObjectVersion {
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uuid: upload_id,
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timestamp,
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state: ObjectVersionState::Uploading {
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multipart: true,
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headers,
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},
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};
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let object = Object::new(bucket_id, key.to_string(), vec![object_version]);
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garage.object_table.insert(&object).await?;
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// Create multipart upload in mpu table
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// This multipart upload will hold references to uploaded parts
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// (which are entries in the Version table)
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let mpu = MultipartUpload::new(upload_id, timestamp, bucket_id, key.into(), false);
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garage.mpu_table.insert(&mpu).await?;
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// Send success response
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let result = s3_xml::InitiateMultipartUploadResult {
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xmlns: (),
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bucket: s3_xml::Value(bucket_name.to_string()),
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key: s3_xml::Value(key.to_string()),
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upload_id: s3_xml::Value(hex::encode(upload_id)),
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};
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let xml = s3_xml::to_xml_with_header(&result)?;
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Ok(Response::new(Body::from(xml.into_bytes())))
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}
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pub async fn handle_put_part(
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garage: Arc<Garage>,
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req: Request<Body>,
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bucket_id: Uuid,
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key: &str,
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part_number: u64,
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upload_id: &str,
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content_sha256: Option<Hash>,
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) -> Result<Response<Body>, Error> {
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let upload_id = decode_upload_id(upload_id)?;
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let content_md5 = match req.headers().get("content-md5") {
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Some(x) => Some(x.to_str()?.to_string()),
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None => None,
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};
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// Read first chuck, and at the same time try to get object to see if it exists
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let key = key.to_string();
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let body = TryStreamExt::map_err(req.into_body(), Error::from);
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let mut chunker = StreamChunker::new(body, garage.config.block_size);
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let ((_, _, mut mpu), first_block) = futures::try_join!(
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get_upload(&garage, &bucket_id, &key, &upload_id),
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chunker.next(),
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)?;
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// Check object is valid and part can be accepted
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let first_block = first_block.ok_or_bad_request("Empty body")?;
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// Calculate part identity: timestamp, version id
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let version_uuid = gen_uuid();
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let mpu_part_key = MpuPartKey {
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part_number,
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timestamp: mpu.next_timestamp(part_number),
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};
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// The following consists in many steps that can each fail.
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// Keep track that some cleanup will be needed if things fail
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// before everything is finished (cleanup is done using the Drop trait).
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let mut interrupted_cleanup = InterruptedCleanup(Some(InterruptedCleanupInner {
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garage: garage.clone(),
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upload_id,
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version_uuid,
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}));
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// Create version and link version from MPU
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mpu.parts.clear();
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mpu.parts.put(
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mpu_part_key,
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MpuPart {
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version: version_uuid,
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etag: None,
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size: None,
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},
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);
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garage.mpu_table.insert(&mpu).await?;
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let version = Version::new(
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version_uuid,
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VersionBacklink::MultipartUpload { upload_id },
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false,
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);
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garage.version_table.insert(&version).await?;
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// Copy data to version
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let first_block_hash = async_blake2sum(first_block.clone()).await;
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let (total_size, data_md5sum, data_sha256sum) = read_and_put_blocks(
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&garage,
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&version,
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part_number,
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first_block,
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first_block_hash,
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&mut chunker,
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)
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.await?;
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// Verify that checksums map
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ensure_checksum_matches(
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data_md5sum.as_slice(),
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data_sha256sum,
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content_md5.as_deref(),
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content_sha256,
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)?;
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// Store part etag in version
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let data_md5sum_hex = hex::encode(data_md5sum);
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mpu.parts.put(
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mpu_part_key,
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MpuPart {
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version: version_uuid,
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etag: Some(data_md5sum_hex.clone()),
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size: Some(total_size),
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},
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);
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garage.mpu_table.insert(&mpu).await?;
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// We were not interrupted, everything went fine.
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// We won't have to clean up on drop.
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interrupted_cleanup.cancel();
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let response = Response::builder()
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.header("ETag", format!("\"{}\"", data_md5sum_hex))
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.body(Body::empty())
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.unwrap();
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Ok(response)
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}
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struct InterruptedCleanup(Option<InterruptedCleanupInner>);
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struct InterruptedCleanupInner {
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garage: Arc<Garage>,
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upload_id: Uuid,
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version_uuid: Uuid,
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}
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impl InterruptedCleanup {
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fn cancel(&mut self) {
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drop(self.0.take());
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}
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}
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impl Drop for InterruptedCleanup {
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fn drop(&mut self) {
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if let Some(info) = self.0.take() {
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tokio::spawn(async move {
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let version = Version::new(
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info.version_uuid,
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VersionBacklink::MultipartUpload {
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upload_id: info.upload_id,
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},
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true,
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);
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if let Err(e) = info.garage.version_table.insert(&version).await {
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warn!("Cannot cleanup after aborted UploadPart: {}", e);
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}
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});
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}
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}
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}
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pub async fn handle_complete_multipart_upload(
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garage: Arc<Garage>,
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req: Request<Body>,
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bucket_name: &str,
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bucket: &Bucket,
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key: &str,
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upload_id: &str,
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content_sha256: Option<Hash>,
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) -> Result<Response<Body>, Error> {
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let body = HttpBody::collect(req.into_body()).await?.to_bytes();
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if let Some(content_sha256) = content_sha256 {
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verify_signed_content(content_sha256, &body[..])?;
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}
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let body_xml = roxmltree::Document::parse(std::str::from_utf8(&body)?)?;
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let body_list_of_parts = parse_complete_multipart_upload_body(&body_xml)
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.ok_or_bad_request("Invalid CompleteMultipartUpload XML")?;
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debug!(
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"CompleteMultipartUpload list of parts: {:?}",
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body_list_of_parts
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);
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let upload_id = decode_upload_id(upload_id)?;
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// Get object and multipart upload
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let key = key.to_string();
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let (object, mut object_version, mpu) =
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get_upload(&garage, &bucket.id, &key, &upload_id).await?;
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if mpu.parts.is_empty() {
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return Err(Error::bad_request("No data was uploaded"));
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}
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let headers = match object_version.state {
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ObjectVersionState::Uploading { headers, .. } => headers,
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_ => unreachable!(),
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};
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// Check that part numbers are an increasing sequence.
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// (it doesn't need to start at 1 nor to be a continuous sequence,
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// see discussion in #192)
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if body_list_of_parts.is_empty() {
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return Err(Error::EntityTooSmall);
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}
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if !body_list_of_parts
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.iter()
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.zip(body_list_of_parts.iter().skip(1))
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.all(|(p1, p2)| p1.part_number < p2.part_number)
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{
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return Err(Error::InvalidPartOrder);
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}
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// Check that the list of parts they gave us corresponds to parts we have here
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debug!("Parts stored in multipart upload: {:?}", mpu.parts.items());
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let mut have_parts = HashMap::new();
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for (pk, pv) in mpu.parts.items().iter() {
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have_parts.insert(pk.part_number, pv);
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}
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let mut parts = vec![];
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for req_part in body_list_of_parts.iter() {
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match have_parts.get(&req_part.part_number) {
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Some(part) if part.etag.as_ref() == Some(&req_part.etag) && part.size.is_some() => {
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parts.push(*part)
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}
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_ => return Err(Error::InvalidPart),
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}
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}
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let grg = &garage;
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let parts_versions = futures::future::try_join_all(parts.iter().map(|p| async move {
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grg.version_table
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.get(&p.version, &EmptyKey)
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.await?
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.ok_or_internal_error("Part version missing from version table")
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}))
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.await?;
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// Create final version and block refs
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let mut final_version = Version::new(
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upload_id,
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VersionBacklink::Object {
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bucket_id: bucket.id,
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key: key.to_string(),
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},
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false,
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);
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for (part_number, part_version) in parts_versions.iter().enumerate() {
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if part_version.deleted.get() {
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return Err(Error::InvalidPart);
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}
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for (vbk, vb) in part_version.blocks.items().iter() {
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final_version.blocks.put(
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VersionBlockKey {
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part_number: (part_number + 1) as u64,
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offset: vbk.offset,
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},
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*vb,
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);
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}
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}
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garage.version_table.insert(&final_version).await?;
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let block_refs = final_version.blocks.items().iter().map(|(_, b)| BlockRef {
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block: b.hash,
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version: upload_id,
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deleted: false.into(),
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});
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garage.block_ref_table.insert_many(block_refs).await?;
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// Calculate etag of final object
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// To understand how etags are calculated, read more here:
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// https://teppen.io/2018/06/23/aws_s3_etags/
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let mut etag_md5_hasher = Md5::new();
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for part in parts.iter() {
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etag_md5_hasher.update(part.etag.as_ref().unwrap().as_bytes());
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}
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let etag = format!(
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"{}-{}",
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hex::encode(etag_md5_hasher.finalize()),
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parts.len()
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);
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// Calculate total size of final object
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let total_size = parts.iter().map(|x| x.size.unwrap()).sum();
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if let Err(e) = check_quotas(&garage, bucket, total_size, Some(&object)).await {
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object_version.state = ObjectVersionState::Aborted;
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let final_object = Object::new(bucket.id, key.clone(), vec![object_version]);
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garage.object_table.insert(&final_object).await?;
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return Err(e);
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}
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// Write final object version
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object_version.state = ObjectVersionState::Complete(ObjectVersionData::FirstBlock(
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ObjectVersionMeta {
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headers,
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size: total_size,
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etag: etag.clone(),
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},
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final_version.blocks.items()[0].1.hash,
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));
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let final_object = Object::new(bucket.id, key.clone(), vec![object_version]);
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garage.object_table.insert(&final_object).await?;
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// Send response saying ok we're done
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let result = s3_xml::CompleteMultipartUploadResult {
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xmlns: (),
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location: None,
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bucket: s3_xml::Value(bucket_name.to_string()),
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key: s3_xml::Value(key),
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etag: s3_xml::Value(format!("\"{}\"", etag)),
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};
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let xml = s3_xml::to_xml_with_header(&result)?;
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Ok(Response::new(Body::from(xml.into_bytes())))
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}
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pub async fn handle_abort_multipart_upload(
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garage: Arc<Garage>,
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bucket_id: Uuid,
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key: &str,
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upload_id: &str,
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) -> Result<Response<Body>, Error> {
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let upload_id = decode_upload_id(upload_id)?;
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let (_, mut object_version, _) =
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get_upload(&garage, &bucket_id, &key.to_string(), &upload_id).await?;
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object_version.state = ObjectVersionState::Aborted;
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let final_object = Object::new(bucket_id, key.to_string(), vec![object_version]);
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garage.object_table.insert(&final_object).await?;
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Ok(Response::new(Body::from(vec![])))
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}
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// ======== helpers ============
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#[allow(clippy::ptr_arg)]
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pub(crate) async fn get_upload(
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garage: &Garage,
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bucket_id: &Uuid,
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key: &String,
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upload_id: &Uuid,
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) -> Result<(Object, ObjectVersion, MultipartUpload), Error> {
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let (object, mpu) = futures::try_join!(
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garage.object_table.get(bucket_id, key).map_err(Error::from),
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garage
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.mpu_table
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.get(upload_id, &EmptyKey)
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.map_err(Error::from),
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)?;
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let object = object.ok_or(Error::NoSuchUpload)?;
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let mpu = mpu.ok_or(Error::NoSuchUpload)?;
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let object_version = object
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.versions()
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.iter()
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.find(|v| v.uuid == *upload_id && v.is_uploading(Some(true)))
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.ok_or(Error::NoSuchUpload)?
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.clone();
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Ok((object, object_version, mpu))
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}
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pub fn decode_upload_id(id: &str) -> Result<Uuid, Error> {
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let id_bin = hex::decode(id).map_err(|_| Error::NoSuchUpload)?;
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if id_bin.len() != 32 {
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return Err(Error::NoSuchUpload);
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}
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let mut uuid = [0u8; 32];
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uuid.copy_from_slice(&id_bin[..]);
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Ok(Uuid::from(uuid))
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}
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#[derive(Debug)]
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struct CompleteMultipartUploadPart {
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etag: String,
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part_number: u64,
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}
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fn parse_complete_multipart_upload_body(
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xml: &roxmltree::Document,
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) -> Option<Vec<CompleteMultipartUploadPart>> {
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let mut parts = vec![];
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let root = xml.root();
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let cmu = root.first_child()?;
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if !cmu.has_tag_name("CompleteMultipartUpload") {
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return None;
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}
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for item in cmu.children() {
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// Only parse <Part> nodes
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if !item.is_element() {
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continue;
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}
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if item.has_tag_name("Part") {
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let etag = item.children().find(|e| e.has_tag_name("ETag"))?.text()?;
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let part_number = item
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.children()
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.find(|e| e.has_tag_name("PartNumber"))?
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.text()?;
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parts.push(CompleteMultipartUploadPart {
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etag: etag.trim_matches('"').to_string(),
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part_number: part_number.parse().ok()?,
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});
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} else {
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return None;
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}
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}
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Some(parts)
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}
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