2012/2/6 Yehuda Sadeh Weinraub <yehudasa@xxxxxxxxx>:
> On Sun, Feb 5, 2012 at 6:21 PM, huang jun <hjwsm1989@xxxxxxxxx> wrote:
>> hi, all
>> Recently, we use s3 client cyberduck to add some files to RADOS, it
>> seems doesn't support objects named with prefix of '_'.
>> eg, if we put a object named "_test"(1 prefix "_") in bucket TEST, it
>> will store in RADOS in another name "___test"(3 prefix "_").
>> but if we list bucket TEST, it sends op whoes oid is "__test"(2
>> prefix "_"), result the RADOS return ENOENT err.
>
> That's a bug. From what I can tell, the bucket listing is broken (when
> object name starts with underscore). I created bug #2025 in the ceph
> tracker.
>
>> we trace the debug log,and found where it comes from:
>> in "translate_raw_obj" func of rgw_common.h,
>> if (obj.size() >= 2 && obj[1] == '_') {
>> obj = obj.substr(1);
>> return true;
>> }
>> why cut the obj name?
>
> The underscore serves as an escape character. Some object are created
> in a separate namespace, and the format for those objects is:
>
> _<namespace>_<obj name>
>
> These objects reside in the bucket, but may not be listable, and may
> not be accounted in the bucket stats.
>
>> what is "string ns" in struct rgw_obj doing here? Can't we just use
>> the origin obj name that passed object_name verfication?
>
> 'ns' is the namespace. I'm not sure what check you're pointing at, but
> we do need to handle the case where an object has a namespace
> different than the default one.
>
I mean here is "validate_object_name" when init the rgw_handler.
i think we should do nothing if the "ns" string is empty.
i have done a test, it works well except that when we download a file
"_test' (size is 20B)
the yberduck returns error "unexpected end of ZLIB input stream".
> Thanks,
> Yehuda
--
thanks.
huangjun
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