* S3: add KeyTooLongError error code
Add ErrKeyTooLongError (HTTP 400, code "KeyTooLongError") to match the
standard AWS S3 error for object keys that exceed length limits.
* S3: fix silent PutObject failure when entry name exceeds max_file_name_length
putToFiler called client.CreateEntry() directly and discarded the gRPC
response. The filer embeds application errors like "entry name too long"
in resp.Error (not as gRPC transport errors), so the error was silently
swallowed and clients received HTTP 200 with an ETag for objects that
were never stored.
Switch to the filer_pb.CreateEntry() helper which properly checks
resp.Error, and map "entry name too long" to KeyTooLongError (HTTP 400).
To avoid fragile string parsing across the gRPC boundary, define shared
error message constants in weed/util/constants and use them in both the
filer (producing errors) and S3 API (matching errors). Switch
filerErrorToS3Error to use strings.Contains/HasSuffix with these
constants so matches work regardless of any wrapper prefix. Apply
filerErrorToS3Error to the mkdir path for directory markers.
Fixes#8759
* S3: enforce 1024-byte maximum object key length
AWS S3 limits object keys to 1024 bytes. Add early validation on write
paths (PutObject, CopyObject, CreateMultipartUpload) to reject keys
exceeding the limit with the standard KeyTooLongError (HTTP 400).
The key length check runs before bucket auto-creation to prevent
overlong keys from triggering unnecessary side effects.
Also use filerErrorToS3Error for CopyObject's mkFile error paths so
name-too-long errors from the filer return KeyTooLongError instead of
InternalError.
Ref #8758
* S3: add handler-level tests for key length validation and error mapping
Add tests for filerErrorToS3Error mapping "entry name too long" to
KeyTooLongError, including a regression test for the CreateEntry-prefixed
"existing ... is a directory" form. Add handler-level integration tests
that exercise PutObjectHandler, CopyObjectHandler, and
NewMultipartUploadHandler via httptest, verifying HTTP 400 and
KeyTooLongError XML response for overlong keys and acceptance of keys at
the 1024-byte limit.
When an S3 upload has a mismatched Content-MD5 header, SeaweedFS was
incorrectly returning a 500 Internal Server Error instead of the proper
400 Bad Request with error code BadDigest (per AWS S3 specification).
Changes:
- Created weed/util/constants/filer.go with error message constants
- Added ErrMsgBadDigest constant for MD5 mismatch errors
- Added ErrMsgOperationNotPermitted constant for WORM permission errors
- Added ErrBadDigest error code with proper 400 status code mapping
- Updated filerErrorToS3Error() to detect MD5 mismatch and return ErrBadDigest
- Updated filer autoChunk() to return 400 Bad Request for MD5 mismatch
- Refactored error handling to use switch statement for better readability
- Ordered error checks with exact matches first for better maintainability
- Updated all error handling to use centralized constants
- Added comprehensive unit tests
All error messages now use constants from a single location for better
maintainability and consistency. Constants placed in util package to avoid
architectural dependency issues.
Fixes#7305
