garage/doc/book/src/reference_manual/s3_compatibility.md

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# S3 Compatibility status
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## Global S3 features
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Implemented:
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- path-style URLs (`garage.tld/bucket/key`)
- vhost-style URLs (`bucket.garage.tld/key`)
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- putting and getting objects in buckets
- multipart uploads
- listing objects
- access control on a per-key-per-bucket basis
Not implemented:
- object-level ACL
- [object versioning](https://git.deuxfleurs.fr/Deuxfleurs/garage/issues/166)
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- encryption
- most `x-amz-` headers
## Endpoint implementation
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All APIs that are not mentionned are not implemented and will return a 501 Not Implemented.
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| Endpoint | Status |
|------------------------------|----------------------------------|
| AbortMultipartUpload | Implemented |
| CompleteMultipartUpload | Implemented |
| CopyObject | Implemented |
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| CreateBucket | Implemented |
| CreateMultipartUpload | Implemented |
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| DeleteBucket | Implemented |
| DeleteBucketWebsite | Implemented |
| DeleteObject | Implemented |
| DeleteObjects | Implemented |
| GetBucketLocation | Implemented |
| GetBucketVersioning | Stub (see below) |
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| GetBucketWebsite | Implemented |
| GetObject | Implemented |
| HeadBucket | Implemented |
| HeadObject | Implemented |
| ListBuckets | Implemented |
| ListObjects | Implemented, bugs? (see below) |
| ListObjectsV2 | Implemented |
Implement ListMultipartUploads (#171) Implement ListMultipartUploads, also refactor ListObjects and ListObjectsV2. It took me some times as I wanted to propose the following things: - Using an iterator instead of the loop+goto pattern. I find it easier to read and it should enable some optimizations. For example, when consuming keys of a common prefix, we do many [redundant checks](https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/main/src/api/s3_list.rs#L125-L156) while the only thing to do is to [check if the following key is still part of the common prefix](https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/feature/s3-multipart-compat/src/api/s3_list.rs#L476). - Try to name things (see ExtractionResult and RangeBegin enums) and to separate concerns (see ListQuery and Accumulator) - An IO closure to make unit tests possibles. - Unit tests, to track regressions and document how to interact with the code - Integration tests with `s3api`. In the future, I would like to move them in Rust with the aws rust SDK. Merging of the logic of ListMultipartUploads and ListObjects was not a goal but a consequence of the previous modifications. Some points that we might want to discuss: - ListObjectsV1, when using pagination and delimiters, has a weird behavior (it lists multiple times the same prefix) with `aws s3api` due to the fact that it can not use our optimization to skip the whole prefix. It is independant from my refactor and can be tested with the commented `s3api` tests in `test-smoke.sh`. It probably has the same weird behavior on the official AWS S3 implementation. - Considering ListMultipartUploads, I had to "abuse" upload id marker to support prefix skipping. I send an `upload-id-marker` with the hardcoded value `include` to emulate your "including" token. - Some ways to test ListMultipartUploads with existing software (my tests are limited to s3api for now). Co-authored-by: Quentin Dufour <quentin@deuxfleurs.fr> Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/171 Co-authored-by: Quentin <quentin@dufour.io> Co-committed-by: Quentin <quentin@dufour.io>
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| ListMultipartUpload | Implemented |
| ListParts | Missing |
| PutObject | Implemented |
| PutBucketWebsite | Partially implemented (see below)|
| UploadPart | Implemented |
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| UploadPartCopy | Implemented |
- **GetBucketVersioning:** Stub implementation (Garage does not yet support versionning so this always returns
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"versionning not enabled").
- **ListObjects:** Implemented, but there isn't a very good specification of what `encoding-type=url` covers so there might be some encoding bugs. In our implementation the url-encoded fields are in the same in ListObjects as they are in ListObjectsV2.
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- **PutBucketWebsite:** Implemented, but only stores the index document suffix and the error document path. Redirects are not supported.