Revert "don't error when asked for 0-based range on empty objects (#17708)"
This reverts commit 7e76d66184.
There is no valid way to specify offsets in a 0-byte file. Blame it on the [RFC](https://datatracker.ietf.org/doc/html/rfc7233#section-4.4)
> The 416 (Range Not Satisfiable) status code indicates that none of the ranges in the
> request's Range header field (Section 3.1) overlap the current extent of the selected resource...
A request for "bytes=0-" is a request for the first byte of a resource. If the resource is 0-length,
the range [0,0] does not overlap the resource content and the server responds with an error.
In a reverse proxying setup, a proxy in front of MinIO may attempt to
request objects in slices for enhanced cache efficiency. Since such a
a proxy cannot have prior knowledge of how large a requested resource is,
it usually sends a header of the form:
Range: 0-$slice_size
... and, depending on the size of the resource, expects either:
- an empty response, if $resource_size == 0
- a full response, if $resource_size <= $slice_size
- a partial response, if $resource_size > $slice_size
Prior to this change, MinIO would respond 416 Range Not Satisfiable if a
client tried to request a range on an empty resource. This behavior is
technically consistent with RFC9110[1] – However, it renders sliced
reverse proxying, such as implemented in Nginx, broken in the case of
empty files. Nginx itself seems to break this convention to enable
"useful" responses in these cases, and MinIO should probably do that
too.
[1]: https://www.rfc-editor.org/rfc/rfc9110#byte.ranges
The new call combines GetObjectInfo and GetObject, and returns an
object with a ReadCloser interface.
Also adds a number of end-to-end encryption tests at the handler
level.
* Revert "Encrypted reader wrapped in NewGetObjectReader should be closed (#6383)"
This reverts commit 53a0bbeb5b.
* Revert "Change SelectAPI to use new GetObjectNInfo API (#6373)"
This reverts commit 5b05df215a.
* Revert "Implement GetObjectNInfo object layer call (#6290)"
This reverts commit e6d740ce09.
This combines calling GetObjectInfo and GetObject while returning a
io.ReadCloser for the object's body. This allows the two operations to
be under a single lock, fixing a race between getting object info and
reading the object body.
