Using conditional GET or wget timestamping for the catalog files

[Juraj Lutter]

On 10/28/13 20:13, Dagobert Michelsen wrote:
> Hi Peter,
> 
> Am 28.10.2013 um 19:45 schrieb Peter Bonivart <bonivart at opencsw.org>:
>> On Mon, Oct 28, 2013 at 6:30 PM, Maciej (Matchek) Bliziński
>> <maciej at opencsw.org> wrote:
>>>
>>> 2013/10/28 Peter Bonivart <bonivart at opencsw.org>:
>>>> Option -O is used all over unfortunately.
>>>
>>> Is it more "-O happens to be used" or "-O must be used by design"?
>>
>> From taking a quick look at the code section where catalogs are
>> fetched it seems to be a case of "download to catalog.tmp, check if
>> ok, if so rename to catalog, otherwise we still have the old catalog".
>>
>> I guess one could do it the other way around, rename current catalog
>> first, download without -O, check and rename back if not successful.
>>
>> It's also used to download to another location than current work dir,
>> so -O sets an absolute path like "/var/opt/csw/pkgutil/catalog....".
>> That could be worked around by changing current work dir.
> 
> Yes, but the dates must be preserved during copying. Maybe --force
> should ignore the timestamping on -U ?

Timestamping when using -O can be achieved by generating custom
"If-Modified-Since" header and passing it via --header parameter to wget.



-- 
Juraj Lutter <wilbury at opencsw.org>