Harihar Shankar created MARMOTTA-655:
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             Summary: Memento Compliance Issues
                 Key: MARMOTTA-655
                 URL: https://issues.apache.org/jira/browse/MARMOTTA-655
             Project: Marmotta
          Issue Type: Bug
            Reporter: Harihar Shankar


We tested the Memento Compliance of Marmotta, and found a few issues that I 
have listed below. I apologize in advance for the long list, please let me know 
if you need more information, I am happy to help.

* The Marmotta TimeGate must respond with an HTTP 302 instead of an HTTP 301 
when redirecting to a Memento.

* The Marmotta TimeGate responds with "HTTP 400 Bad Request" when no 
Accept-Datetime header is provided. Instead, the TimeGate should respond with 
the most recent Memento in this case. This section of the [Memento 
RFC|http://mementoweb.org/guide/rfc/#SpecialCases-AD] describes this scenario.

* The Marmotta TimeGate should *not* provide the Memento-Datetime header.

*  The Date value expressed in all the headers must be in the HTTP Date format 
specified by [RFC 1123|http://www.ietf.org/rfc/rfc1123.txt] and in the *GMT* 
timezone, like 
{code}Memento-Datetime: Tue, 15 Nov 1994 08:12:31 GMT{code}
This would apply to all the date values in the Link headers, Memento-Datetime 
header, and in the TimeMaps.

* When importing data in to Marmotta from a document, the rel="original" in the 
Link headers for TimeGate and Memento point to the Subject URL and not the 
Marmotta resource instance's {base URL + Subject URL}. 
For eg, When we uploaded a document with subject 
http://dbpedia.org/resource/English, the TimeGate responds with:
{code}
curl -I "Accept-Datetime: Mon, 19 Sep 2016 23:47:12 GMT" 
http://localhost:8080/marmotta/memento/timegate/http://dbpedia.org/resource/English
Link: ..., <http://dbpedia.org/resource/English>;rel="original", ....
{code}
Instead, this should be something like:
{code}
Link: ...., <{marmotta_base_url}+http://dbpedia.org/resource/English>; 
rel="original",...
{code}

* The Marmotta versioning page at  
http://localhost:8080/marmotta/versioning/admin/about.html points to 
MementoFox, which is not maintained any longer and is not recommended. The 
[Memento For Chrome|http://bit.ly/memento-for-chrome] extension is actively 
maintained and is highly recommended. 

In case you are not aware, there is a [Memento 
Validator|http://mementoweb.org/tools/validator/] that tests an instance for 
RFC compliance. 



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