1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
|
use std::collections::{BTreeMap, VecDeque};
use std::fmt::Write;
use std::sync::Arc;
use futures::stream::*;
use hyper::{Body, Request, Response};
use md5::{digest::generic_array::*, Digest as Md5Digest, Md5};
use sha2::Sha256;
use garage_table::*;
use garage_util::data::*;
use garage_util::error::Error as GarageError;
use garage_util::time::*;
use garage_model::block::INLINE_THRESHOLD;
use garage_model::block_ref_table::*;
use garage_model::garage::Garage;
use garage_model::object_table::*;
use garage_model::version_table::*;
use crate::encoding::*;
use crate::error::*;
use crate::signature::verify_signed_content;
pub async fn handle_put(
garage: Arc<Garage>,
req: Request<Body>,
bucket: &str,
key: &str,
content_sha256: Option<Hash>,
) -> Result<Response<Body>, Error> {
// Generate identity of new version
let version_uuid = gen_uuid();
let version_timestamp = now_msec();
// Retrieve interesting headers from request
let headers = get_headers(&req)?;
debug!("Object headers: {:?}", headers);
let content_md5 = match req.headers().get("content-md5") {
Some(x) => Some(x.to_str()?.to_string()),
None => None,
};
// Parse body of uploaded file
let body = req.into_body();
let mut chunker = BodyChunker::new(body, garage.config.block_size);
let first_block = chunker.next().await?.unwrap_or_default();
// If body is small enough, store it directly in the object table
// as "inline data". We can then return immediately.
if first_block.len() < INLINE_THRESHOLD {
let mut md5sum = Md5::new();
md5sum.update(&first_block[..]);
let data_md5sum = md5sum.finalize();
let data_md5sum_hex = hex::encode(data_md5sum);
let data_sha256sum = sha256sum(&first_block[..]);
ensure_checksum_matches(
data_md5sum.as_slice(),
data_sha256sum,
content_md5.as_deref(),
content_sha256,
)?;
let object_version = ObjectVersion {
uuid: version_uuid,
timestamp: version_timestamp,
state: ObjectVersionState::Complete(ObjectVersionData::Inline(
ObjectVersionMeta {
headers,
size: first_block.len() as u64,
etag: data_md5sum_hex.clone(),
},
first_block,
)),
};
let object = Object::new(bucket.into(), key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
return Ok(put_response(version_uuid, data_md5sum_hex));
}
// Write version identifier in object table so that we have a trace
// that we are uploading something
let mut object_version = ObjectVersion {
uuid: version_uuid,
timestamp: version_timestamp,
state: ObjectVersionState::Uploading(headers.clone()),
};
let object = Object::new(bucket.into(), key.into(), vec![object_version.clone()]);
garage.object_table.insert(&object).await?;
// Initialize corresponding entry in version table
// Write this entry now, even with empty block list,
// to prevent block_ref entries from being deleted (they can be deleted
// if the reference a version that isn't found in the version table)
let version = Version::new(version_uuid, bucket.into(), key.into(), false);
garage.version_table.insert(&version).await?;
// Transfer data and verify checksum
let first_block_hash = blake2sum(&first_block[..]);
let tx_result = read_and_put_blocks(
&garage,
&version,
1,
first_block,
first_block_hash,
&mut chunker,
)
.await
.and_then(|(total_size, data_md5sum, data_sha256sum)| {
ensure_checksum_matches(
data_md5sum.as_slice(),
data_sha256sum,
content_md5.as_deref(),
content_sha256,
)
.map(|()| (total_size, data_md5sum))
});
// If something went wrong, clean up
let (total_size, md5sum_arr) = match tx_result {
Ok(rv) => rv,
Err(e) => {
// Mark object as aborted, this will free the blocks further down
object_version.state = ObjectVersionState::Aborted;
let object = Object::new(bucket.into(), key.into(), vec![object_version.clone()]);
garage.object_table.insert(&object).await?;
return Err(e);
}
};
// Save final object state, marked as Complete
let md5sum_hex = hex::encode(md5sum_arr);
object_version.state = ObjectVersionState::Complete(ObjectVersionData::FirstBlock(
ObjectVersionMeta {
headers,
size: total_size,
etag: md5sum_hex.clone(),
},
first_block_hash,
));
let object = Object::new(bucket.into(), key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
Ok(put_response(version_uuid, md5sum_hex))
}
/// Validate MD5 sum against content-md5 header
/// and sha256sum against signed content-sha256
fn ensure_checksum_matches(
data_md5sum: &[u8],
data_sha256sum: garage_util::data::FixedBytes32,
content_md5: Option<&str>,
content_sha256: Option<garage_util::data::FixedBytes32>,
) -> Result<(), Error> {
if let Some(expected_sha256) = content_sha256 {
if expected_sha256 != data_sha256sum {
return Err(Error::BadRequest(
"Unable to validate x-amz-content-sha256".to_string(),
));
} else {
trace!("Successfully validated x-amz-content-sha256");
}
}
if let Some(expected_md5) = content_md5 {
if expected_md5.trim_matches('"') != base64::encode(data_md5sum) {
return Err(Error::BadRequest(
"Unable to validate content-md5".to_string(),
));
} else {
trace!("Successfully validated content-md5");
}
}
Ok(())
}
async fn read_and_put_blocks(
garage: &Garage,
version: &Version,
part_number: u64,
first_block: Vec<u8>,
first_block_hash: Hash,
chunker: &mut BodyChunker,
) -> Result<(u64, GenericArray<u8, typenum::U16>, Hash), Error> {
let mut md5hasher = Md5::new();
let mut sha256hasher = Sha256::new();
md5hasher.update(&first_block[..]);
sha256hasher.update(&first_block[..]);
let mut next_offset = first_block.len();
let mut put_curr_version_block = put_block_meta(
&garage,
&version,
part_number,
0,
first_block_hash,
first_block.len() as u64,
);
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 {
md5hasher.update(&block[..]);
sha256hasher.update(&block[..]);
let block_hash = blake2sum(&block[..]);
let block_len = block.len();
put_curr_version_block = put_block_meta(
&garage,
&version,
part_number,
next_offset as u64,
block_hash,
block_len as u64,
);
put_curr_block = garage.block_manager.rpc_put_block(block_hash, block);
next_offset += block_len;
} else {
break;
}
}
let total_size = next_offset as u64;
let data_md5sum = md5hasher.finalize();
let data_sha256sum = sha256hasher.finalize();
let data_sha256sum = Hash::try_from(&data_sha256sum[..]).unwrap();
Ok((total_size, data_md5sum, data_sha256sum))
}
async fn put_block_meta(
garage: &Garage,
version: &Version,
part_number: u64,
offset: u64,
hash: Hash,
size: u64,
) -> Result<(), GarageError> {
let mut version = version.clone();
version.blocks.put(
VersionBlockKey {
part_number,
offset,
},
VersionBlock { hash, size },
);
let block_ref = BlockRef {
block: hash,
version: version.uuid,
deleted: false.into(),
};
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::with_capacity(2 * block_size),
}
}
async fn next(&mut self) -> Result<Option<Vec<u8>>, GarageError> {
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.is_empty() {
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 fn put_response(version_uuid: Uuid, md5sum_hex: String) -> Response<Body> {
Response::builder()
.header("x-amz-version-id", hex::encode(version_uuid))
.header("ETag", format!("\"{}\"", md5sum_hex))
.body(Body::from(vec![]))
.unwrap()
}
pub async fn handle_create_multipart_upload(
garage: Arc<Garage>,
req: &Request<Body>,
bucket: &str,
key: &str,
) -> Result<Response<Body>, Error> {
let version_uuid = gen_uuid();
let headers = get_headers(req)?;
// Create object in object table
let object_version = ObjectVersion {
uuid: version_uuid,
timestamp: now_msec(),
state: ObjectVersionState::Uploading(headers),
};
let object = Object::new(bucket.to_string(), key.to_string(), vec![object_version]);
garage.object_table.insert(&object).await?;
// Insert empty version so that block_ref entries refer to something
// (they are inserted concurrently with blocks in the version table, so
// there is the possibility that they are inserted before the version table
// is created, in which case it is allowed to delete them, e.g. in repair_*)
let version = Version::new(version_uuid, bucket.into(), key.into(), false);
garage.version_table.insert(&version).await?;
// Send success response
let mut xml = String::new();
writeln!(&mut xml, r#"<?xml version="1.0" encoding="UTF-8"?>"#).unwrap();
writeln!(
&mut xml,
r#"<InitiateMultipartUploadResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">"#
)
.unwrap();
writeln!(&mut xml, "\t<Bucket>{}</Bucket>", bucket).unwrap();
writeln!(&mut xml, "\t<Key>{}</Key>", xml_escape(key)).unwrap();
writeln!(
&mut xml,
"\t<UploadId>{}</UploadId>",
hex::encode(version_uuid)
)
.unwrap();
writeln!(&mut xml, "</InitiateMultipartUploadResult>").unwrap();
Ok(Response::new(Body::from(xml.into_bytes())))
}
pub async fn handle_put_part(
garage: Arc<Garage>,
req: Request<Body>,
bucket: &str,
key: &str,
part_number_str: &str,
upload_id: &str,
content_sha256: Option<Hash>,
) -> Result<Response<Body>, Error> {
// Check parameters
let part_number = part_number_str
.parse::<u64>()
.ok_or_bad_request("Invalid part number")?;
let version_uuid = decode_upload_id(upload_id)?;
let content_md5 = match req.headers().get("content-md5") {
Some(x) => Some(x.to_str()?.to_string()),
None => None,
};
// Read first chuck, and at the same time try to get object to see if it exists
let bucket = bucket.to_string();
let key = key.to_string();
let mut chunker = BodyChunker::new(req.into_body(), garage.config.block_size);
let (object, first_block) =
futures::try_join!(garage.object_table.get(&bucket, &key), chunker.next(),)?;
// Check object is valid and multipart block can be accepted
let first_block = first_block.ok_or_else(|| Error::BadRequest("Empty body".to_string()))?;
let object = object.ok_or_else(|| Error::BadRequest("Object not found".to_string()))?;
if !object
.versions()
.iter()
.any(|v| v.uuid == version_uuid && v.is_uploading())
{
return Err(Error::NotFound);
}
// Copy block to store
let version = Version::new(version_uuid, bucket, key, false);
let first_block_hash = blake2sum(&first_block[..]);
let (_, data_md5sum, data_sha256sum) = read_and_put_blocks(
&garage,
&version,
part_number,
first_block,
first_block_hash,
&mut chunker,
)
.await?;
// Verify that checksums map
ensure_checksum_matches(
data_md5sum.as_slice(),
data_sha256sum,
content_md5.as_deref(),
content_sha256,
)?;
// Store part etag in version
let data_md5sum_hex = hex::encode(data_md5sum);
let mut version = version;
version
.parts_etags
.put(part_number, data_md5sum_hex.clone());
garage.version_table.insert(&version).await?;
let response = Response::builder()
.header("ETag", format!("\"{}\"", data_md5sum_hex))
.body(Body::from(vec![]))
.unwrap();
Ok(response)
}
pub async fn handle_complete_multipart_upload(
garage: Arc<Garage>,
req: Request<Body>,
bucket: &str,
key: &str,
upload_id: &str,
content_sha256: Option<Hash>,
) -> Result<Response<Body>, Error> {
let body = hyper::body::to_bytes(req.into_body()).await?;
verify_signed_content(content_sha256, &body[..])?;
let body_xml = roxmltree::Document::parse(&std::str::from_utf8(&body)?)?;
let body_list_of_parts = parse_complete_multpart_upload_body(&body_xml)
.ok_or_bad_request("Invalid CompleteMultipartUpload XML")?;
debug!(
"CompleteMultipartUpload list of parts: {:?}",
body_list_of_parts
);
let version_uuid = decode_upload_id(upload_id)?;
let bucket = bucket.to_string();
let key = key.to_string();
let (object, version) = futures::try_join!(
garage.object_table.get(&bucket, &key),
garage.version_table.get(&version_uuid, &EmptyKey),
)?;
let object = object.ok_or_else(|| Error::BadRequest("Object not found".to_string()))?;
let mut object_version = object
.versions()
.iter()
.find(|v| v.uuid == version_uuid && v.is_uploading())
.cloned()
.ok_or_else(|| Error::BadRequest("Version not found".to_string()))?;
let version = version.ok_or_else(|| Error::BadRequest("Version not found".to_string()))?;
if version.blocks.is_empty() {
return Err(Error::BadRequest("No data was uploaded".to_string()));
}
let headers = match object_version.state {
ObjectVersionState::Uploading(headers) => headers,
_ => unreachable!(),
};
// Check that the list of parts they gave us corresponds to the parts we have here
debug!("Expected parts from request: {:?}", body_list_of_parts);
debug!("Parts stored in version: {:?}", version.parts_etags.items());
let parts = version
.parts_etags
.items()
.iter()
.map(|pair| (&pair.0, &pair.1));
let same_parts = body_list_of_parts
.iter()
.map(|x| (&x.part_number, &x.etag))
.eq(parts);
if !same_parts {
return Err(Error::BadRequest(
"We don't have the same parts".to_string(),
));
}
// Calculate etag of final object
// To understand how etags are calculated, read more here:
// https://teppen.io/2018/06/23/aws_s3_etags/
let num_parts = version.blocks.items().last().unwrap().0.part_number
- version.blocks.items().first().unwrap().0.part_number
+ 1;
let mut etag_md5_hasher = Md5::new();
for (_, etag) in version.parts_etags.items().iter() {
etag_md5_hasher.update(etag.as_bytes());
}
let etag = format!("{}-{}", hex::encode(etag_md5_hasher.finalize()), num_parts);
// Calculate total size of final object
let total_size = version.blocks.items().iter().map(|x| x.1.size).sum();
// Write final object version
object_version.state = ObjectVersionState::Complete(ObjectVersionData::FirstBlock(
ObjectVersionMeta {
headers,
size: total_size,
etag,
},
version.blocks.items()[0].1.hash,
));
let final_object = Object::new(bucket.clone(), key.clone(), vec![object_version]);
garage.object_table.insert(&final_object).await?;
// Send response saying ok we're done
let mut xml = String::new();
writeln!(&mut xml, r#"<?xml version="1.0" encoding="UTF-8"?>"#).unwrap();
writeln!(
&mut xml,
r#"<CompleteMultipartUploadResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">"#
)
.unwrap();
writeln!(
&mut xml,
"\t<Location>{}</Location>",
garage.config.s3_api.s3_region
)
.unwrap();
writeln!(&mut xml, "\t<Bucket>{}</Bucket>", bucket).unwrap();
writeln!(&mut xml, "\t<Key>{}</Key>", xml_escape(&key)).unwrap();
writeln!(&mut xml, "</CompleteMultipartUploadResult>").unwrap();
Ok(Response::new(Body::from(xml.into_bytes())))
}
pub async fn handle_abort_multipart_upload(
garage: Arc<Garage>,
bucket: &str,
key: &str,
upload_id: &str,
) -> Result<Response<Body>, Error> {
let version_uuid = decode_upload_id(upload_id)?;
let object = garage
.object_table
.get(&bucket.to_string(), &key.to_string())
.await?;
let object = object.ok_or_else(|| Error::BadRequest("Object not found".to_string()))?;
let object_version = object
.versions()
.iter()
.find(|v| v.uuid == version_uuid && v.is_uploading());
let mut object_version = match object_version {
None => return Err(Error::NotFound),
Some(x) => x.clone(),
};
object_version.state = ObjectVersionState::Aborted;
let final_object = Object::new(bucket.to_string(), key.to_string(), vec![object_version]);
garage.object_table.insert(&final_object).await?;
Ok(Response::new(Body::from(vec![])))
}
fn get_mime_type(req: &Request<Body>) -> Result<String, Error> {
Ok(req
.headers()
.get(hyper::header::CONTENT_TYPE)
.map(|x| x.to_str())
.unwrap_or(Ok("blob"))?
.to_string())
}
pub(crate) fn get_headers(req: &Request<Body>) -> Result<ObjectVersionHeaders, Error> {
let content_type = get_mime_type(req)?;
let mut other = BTreeMap::new();
// Preserve standard headers
let standard_header = vec![
hyper::header::CACHE_CONTROL,
hyper::header::CONTENT_DISPOSITION,
hyper::header::CONTENT_ENCODING,
hyper::header::CONTENT_LANGUAGE,
hyper::header::EXPIRES,
];
for h in standard_header.iter() {
if let Some(v) = req.headers().get(h) {
match v.to_str() {
Ok(v_str) => {
other.insert(h.to_string(), v_str.to_string());
}
Err(e) => {
warn!("Discarding header {}, error in .to_str(): {}", h, e);
}
}
}
}
// Preserve x-amz-meta- headers
for (k, v) in req.headers().iter() {
if k.as_str().starts_with("x-amz-meta-") {
match v.to_str() {
Ok(v_str) => {
other.insert(k.to_string(), v_str.to_string());
}
Err(e) => {
warn!("Discarding header {}, error in .to_str(): {}", k, e);
}
}
}
}
Ok(ObjectVersionHeaders {
content_type,
other,
})
}
fn decode_upload_id(id: &str) -> Result<Uuid, Error> {
let id_bin = hex::decode(id).ok_or_bad_request("Invalid upload ID")?;
if id_bin.len() != 32 {
return None.ok_or_bad_request("Invalid upload ID");
}
let mut uuid = [0u8; 32];
uuid.copy_from_slice(&id_bin[..]);
Ok(Uuid::from(uuid))
}
#[derive(Debug)]
struct CompleteMultipartUploadPart {
etag: String,
part_number: u64,
}
fn parse_complete_multpart_upload_body(
xml: &roxmltree::Document,
) -> Option<Vec<CompleteMultipartUploadPart>> {
let mut parts = vec![];
let root = xml.root();
let cmu = root.first_child()?;
if !cmu.has_tag_name("CompleteMultipartUpload") {
return None;
}
for item in cmu.children() {
if item.has_tag_name("Part") {
let etag = item.children().find(|e| e.has_tag_name("ETag"))?.text()?;
let part_number = item
.children()
.find(|e| e.has_tag_name("PartNumber"))?
.text()?;
parts.push(CompleteMultipartUploadPart {
etag: etag.trim_matches('"').to_string(),
part_number: part_number.parse().ok()?,
});
} else {
return None;
}
}
Some(parts)
}
|
