Hi Monika,
I wasn't able to understand your issue, why are you sending HTTP requests
with response parameters? They trigger no action from the server, at least
they would trigger an error.
I don't know which http server is being used within those request examples,
but the Expires HTTP header is commonly inactive by default, basically the
server could use some caching mechanism for subsequent responses or not,
seems like one of them supports cache, and the other one does not.
On 27 November 2012 17:11, Monika Mevenkamp <[email protected]> wrote:
> Looking at several DSPACE instance I see the following behaviour
>
> wget -S <abitstream>
> gets the bistream - shows the last modfified date
> wget -S --header '"Last-Modified of bitstream + 1 day'
> gets the bistream - although the given date is 1 day later than the
> bitstream's last modified
>
> In one example instance I see an Expires header that matches the current
> time
> In another example Last-Modified doesn't seem to trigger a 'short'
> response even though there is no Expires header
>
> How can this be fixed ?
>
> Monika
>
>
> Here two actual examples:
>
> Expires header in response:
>
> wget -S --header "Last-Modified: Mon, 20 Mar 2006 10:14:50 GMT" '
> http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/1337/SteveStarcevichThesisText.pdf?sequence=1
> '
> --2012-11-27 11:25:01--
>
> http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/1337/SteveStarcevichThesisText.pdf?sequence=1
> Resolving ir.library.oregonstate.edu <http://ir.library.oregonstate.edu>
> (ir.library.oregonstate.edu <http://ir.library.oregonstate.edu>)...
> 128.193.164.207
> Connecting to ir.library.oregonstate.edu
> <http://ir.library.oregonstate.edu> (ir.library.oregonstate.edu
> <http://ir.library.oregonstate.edu>)|128.193.164.207|:80... connected.
>
> HTTP request sent, awaiting response...
> HTTP/1.1 200 OK
> Date: Tue, 27 Nov 2012 16:25:01 GMT
> Server: Apache/2.2.15 (CentOS)
> Set-Cookie: JSESSIONID=185239DA0AE43D7B68997ED7D6E1EA5E; Path=/xmlui
> X-Cocoon-Version: 2.2.0
> Vary: User-Agent
> * Last-Modified: Sun, 19 Mar 2006 10:14:50 GMT*
> * Expires: Tue, 27 Nov 2012 17:25:01 GMT*
>
> Content-Length: 165582
> Connection: close
> Content-Type: application/pdf
> Length: 165582 (162K) [application/pdf]
> Saving to: `SteveStarcevichThesisText.pdf?sequence=1.1'
>
> 100%[======================================>] 165,582 355K/s in 0.5s
>
> 2012-11-27 11:25:02 (355 KB/s) -
> `SteveStarcevichThesisText.pdf?sequence=1.1' saved [165582/165582]
>
>
> Example without Expires
>
> wget -S --header "Last-Modified: Thur, 05 Jun 2008 15:48:31 GMT" '
> http://archive.nyu.edu/bitstream/2451/27463/2/SSRN-id143108.pdf'
> --2012-11-27 11:30:00--
> http://archive.nyu.edu/bitstream/2451/27463/2/SSRN-id143108.pdf
> Resolving archive.nyu.edu <http://archive.nyu.edu> (archive.nyu.edu
> <http://archive.nyu.edu>)... 128.122.108.89 <tel:128.122.108.89>
> Connecting to archive.nyu.edu <http://archive.nyu.edu> (archive.nyu.edu
> <http://archive.nyu.edu>)|128.122.108.89 <tel:128.122.108.89>|:80...
>
> connected.
> HTTP request sent, awaiting response...
> HTTP/1.1 200 OK
> Date: Tue, 27 Nov 2012 16:30:00 GMT
> Server: Apache/2.2.9 (Unix) mod_jk/1.2.26 mod_ssl/2.2.9 OpenSSL/0.9.7d
> Set-Cookie: JSESSIONID=19AF7C000ED11486D99A8BF7AE7BCC6A; Path=/
> * Last-Modified: Wed, 04 Jun 2008 15:48:31 GMT*
>
> Content-Length: 426332
> Keep-Alive: timeout=5, max=100
> Connection: Keep-Alive
> Content-Type: application/pdf
> Length: 426332 (416K) [application/pdf]
> Saving to: `SSRN-id143108.pdf.7'
>
> 100%[======================================>] 426,332 2.17M/s in 0.2s
>
> 2012-11-27 11:30:00 (2.17 MB/s) - `SSRN-id143108.pdf.7' saved
> [426332/426332]
>
> .......
> Monika Mevenkamp
> Lead Software Engineer, Educopia Institute / MetaArchive Cooperative
>
> http://tinyurl.com/mevenkamp
>
>
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