Hi, On 30/11/12 05:12, João Melo wrote: > the actual DSpace implementation already supports If-Modified-Since > http parameter (checked against versions 1.8+).
Careful though, if you're using XMLUI then the If-Modified-Since request header gets different results for item pages when the request comes from a "known crawler" compared to from anyone else. Known crawler: XMLUI will respond with 304 (not modified) if the timestamp provided is after the item's last modified timestamp (to seconds precision I think) Anyone else: XMLUI will respond with 304 only if the timestamp provided is after the timestamp that the item page was last added to the Cocoon cache. To see details about the logic (1.8.x), look here: https://github.com/DSpace/DSpace/blob/dspace-1_8_x/dspace-xmlui/dspace-xmlui-api/src/main/resources/aspects/ViewArtifacts/sitemap.xmap#L141 To see the list of known crawlers (1.8.x), look here: https://github.com/DSpace/DSpace/blob/dspace-1_8_x/dspace-xmlui/dspace-xmlui-webapp/src/main/webapp/sitemap.xmap#L127 >From what I can tell, the "last modified" response header will always correspond to the timestamp when the item page was last added to the Cocoon cache, regardless of the user agent making the request. In fact this appears to have brought down one of "my" instances because it made a Google Search Appliance decide to re-crawl every item page in 10-minute intervals... But it looks like the "last modified" behaviour comes from deep within Cocoon and can't be changed easily. Though I noticed that demo.dspace.org's XMLUI doesn't send "last modified" for item pages, so it looks like something has changed between DSpace 1.8.x and 3.0. (Also, if anyone on the list has run into / solved problems with GSA and DSpace, I'd be happy to hear about it...) cheers, Andrea -- Dr Andrea Schweer IRR Technical Specialist, ITS Information Systems The University of Waikato, Hamilton, New Zealand ------------------------------------------------------------------------------ Keep yourself connected to Go Parallel: VERIFY Test and improve your parallel project with help from experts and peers. http://goparallel.sourceforge.net _______________________________________________ DSpace-tech mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dspace-tech List Etiquette: https://wiki.duraspace.org/display/DSPACE/Mailing+List+Etiquette
