Fixes#2123Fixes#2120Fixes#2116Fixes#2111Fixes#2108Fixes#2086Fixes#2085Fixes#2083Fixes#2081Fixes#2080Fixes#2073Fixes#2072Fixes#2071Fixes#2069Fixes#2044Fixes#2043Fixes#2042Fixes#2041Fixes#2040Fixes#2039Fixes#2036Fixes#2035Fixes#2034Fixes#2028Fixes#2020Fixes#1842Fixes#1810Fixes#1780Fixes#1775Fixes#1736Fixes#1705Fixes#1663Fixes#1645Fixes#1583Fixes#1526Fixes#1514Fixes#1493Fixes#1487Fixes#959Fixes#779Closes#823Closes#85
Refactor global S3 error handling around structured error types and centralized XML response generation.
All S3 errors now share the common APIError base for the fields every error has: Code, HTTP status code, and Message. Non-traditional errors that need AWS-compatible XML fields now have dedicated typed errors in the s3err package. Each typed error implements the shared S3Error behavior so controllers and middleware can handle errors consistently while still emitting error-specific XML fields.
Add a dedicated InvalidArgumentError type because InvalidArgument is used widely across request validation, auth, copy source handling, object lock validation, multipart validation, and header parsing. The new InvalidArgument path uses explicit InvalidArgErrorCode constants with predefined descriptions and ArgumentName values, keeping call sites readable while preserving the correct InvalidArgument XML shape and optional ArgumentValue.
New structured errors added in s3err:
- `AccessForbiddenError`: Method, ResourceType
- `BadDigestError`: CalculatedDigest, ExpectedDigest
- `BucketError`: BucketName
- `ContentSHA256MismatchError`: ClientComputedContentSHA256, S3ComputedContentSHA256
- `EntityTooLargeError`: ProposedSize, MaxSizeAllowed
- `EntityTooSmallError`: ProposedSize, MinSizeAllowed
- `ExpiredPresignedURLError`: ServerTime, XAmzExpires, Expires
- `InvalidAccessKeyIdError`: AWSAccessKeyId
- `InvalidArgumentError`: Description, ArgumentName, ArgumentValue
- `InvalidChunkSizeError`: Chunk, BadChunkSize
- `InvalidDigestError`: ContentMD5
- `InvalidLocationConstraintError`: LocationConstraint
- `InvalidPartError`: UploadId, PartNumber, ETag
- `InvalidRangeError`: RangeRequested, ActualObjectSize
- `InvalidTagError`: TagKey, TagValue
- `KeyTooLongError`: Size, MaxSizeAllowed
- `MetadataTooLargeError`: Size, MaxSizeAllowed
- `MethodNotAllowedError`: Method, ResourceType, AllowedMethods
- `NoSuchUploadError`: UploadId
- `NoSuchVersionError`: Key, VersionId
- `NotImplementedError`: Header, AdditionalMessage
- `PreconditionFailedError`: Condition
- `RequestTimeTooSkewedError`: RequestTime, ServerTime, MaxAllowedSkewMilliseconds
- `SignatureDoesNotMatchError`: AWSAccessKeyId, StringToSign, SignatureProvided, StringToSignBytes, CanonicalRequest, CanonicalRequestBytes
Fix CompleteMultipartUpload validation in the Azure backend so missing or empty `ETag` values return the appropriate S3 error instead of allowing a gateway panic.
Fix presigned authentication expiration validation to compare server time in `UTC`, matching the `UTC` timestamp used by presigned URL signing.
Add request ID and host ID support across S3 requests. Each request now receives AWS S3-like identifiers, returned in response headers as `x-amz-request-id` and `x-amz-id-2` and included in all XML error responses as RequestId and HostId. The generated ID structure is designed to resemble AWS S3 request IDs and host IDs.
The request signature calculation/validation for streaming uploads was previously delayed until the request body was fully read, both for Authorization header authentication and presigned URLs.
Now, the signature is validated immediately in the authorization middlewares without reading the request body, since the signature calculation itself does not depend on the request body. Instead, only the `x-amz-content-sha256` SHA-256 hash calculation is delayed.
Fixes#1606
According to AWS documentation:
> *“The PUT request header is limited to 8 KB in size. Within the PUT request header, the user-defined metadata is limited to 2 KB in size. The size of user-defined metadata is measured by taking the sum of the number of bytes in the UTF-8 encoding of each key and value.”*
Based on this, object metadata size is now limited to **2 KB** for all object upload operations (`PutObject`, `CopyObject`, and `CreateMultipartUpload`).
Fixes handling of metadata HTTP headers when the same header appears multiple times with different casing or even if they are identical. According to S3 behavior, these headers must be merged into a single lower-cased metadata key, with values concatenated using commas.
Example:
```
x-amz-meta-Key: value1
x-amz-meta-kEy: value2
x-amz-meta-keY: value3
```
Translated to:
```
key: value1,value2,value3
```
This PR also introduces an **8 KB limit for request headers**. Although the S3 documentation explicitly mentions the 8 KB limit only for **PUT requests**, in practice this limit applies to **all requests**.
To enforce the header size limit, the Fiber configuration option `ReadBufferSize` is used. This parameter defines the maximum number of bytes read when parsing an incoming request. Note that this limit does not apply strictly to request headers only, since request parsing also includes other parts of the request line (e.g., the HTTP method, protocol string, and version such as `HTTP/1.1`). So `ReadBufferSize` is effectively a limit for request headers size, but not the exact limit.
Closes#1714
There is a `Location` field in the `CompleteMultipartUpload` result that represents the newly created object URL. This PR adds this property to the `CompleteMultipartUpload` response, generating it dynamically in either host-style or path-style format, depending on the gateway configuration.
Closes#1566
When an object is locked and bucket versioning is not configured at the gateway level, any object overwrite request should be rejected with an object locked error. The `PutObject` operation already follows this behavior, but `CopyObject` and `CompleteMultipartUpload` were missing this check. This change introduces the locking mechanism for `CopyObject` and `CompleteMultipartUpload` operations.
Fixes#1328
If `CompleteMultipartUpload` is attempted with empty `Parts` list, the gateway used to return `InvalidRequest`. Now it's changed to `MalformedXML`.
Fixes#1345
The previous implementation incorrectly parsed the `x-amz-sdk-checksum-algorithm` header for the `CompleteMultipartUpload` operation, even though this header is not expected and should be ignored. It also mistakenly treated the `x-amz-checksum-algorithm` header as an invalid value for `x-amz-checksum-x`.
The updated implementation only parses the `x-amz-sdk-checksum-algorithm` header for `PutObject` and `UploadPart` operations. Additionally, `x-amz-checksum-algorithm` and `x-amz-checksum-type` headers are now correctly ignored when parsing the precalculated checksum headers (`x-amz-checksum-x`).
Fixes#1339
`x-amz-checksum-type` and `x-amz-checksum-algorithm` request headers should be case insensitive in `CreateMultipartUpload`.
The changes include parsing the header values to upper case before validating and passing to back-end. `x-amz-checksum-type` response header was added in`CreateMultipartUpload`, which was missing before.
Fixes#1398
The `x-amz-mp-object-size` request header can have two erroneous states: an invalid value or a negative integer. AWS returns different error descriptions for each case. This PR fixes the error description for the invalid header value case.
The invalid case can't be integration tested as SDK expects `int64` as the header value.
niksis02