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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