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appropriate representation of the requested resource sparql #32

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GilJ opened this issue Apr 29, 2014 · 3 comments
Closed

appropriate representation of the requested resource sparql #32

GilJ opened this issue Apr 29, 2014 · 3 comments

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@GilJ
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GilJ commented Apr 29, 2014

I created a new rails 3.2.12 project, with the 0.9.3 version of Tripod.
I have an endpoint at: http://ewi.mmlab.be/geo/ which I place in my configuration like this:

  Tripod.configure do |config|
    config.query_endpoint = 'http://ewi.mmlab.be/geo/'
    config.timeout_seconds = 30
    config.logger = Logger.new(STDOUT)
  end

I created the following model to get data from the endpoint:

class Category
  include Tripod::Resource

  rdf_type 'http://ewi.mmlab.be/ns#StatisticCategory'
  field :title, RDF::RDFS.label
end

However, when I try to fetch all categories I get the following error:

An appropriate representation of the requested resource sparql could not be found on this server.

I think the problem is with the request wanting 'application/n-triples', but the endpoint associates 'text/plain' with n-triples. Is there any way for me to configure this?

Full error output:

Loading development environment (Rails 3.2.12)
1.9.3p448 :001 > Category.all.resources
TRIPOD: building select query for criteria...
TRIPOD: with return_graph: true
TRIPOD caching is off!
TRIPOD: About to run query: SELECT DISTINCT ?uri ?graph WHERE { GRAPH ?graph { ?uri a <http://ewi.mmlab.be/ns#StatisticCategory> . ?uri ?p ?o } }
TRIPOD: Streaming fron url: http://ewi.mmlab.be/geo/
TRIPOD: Streaming opts: {:accept=>"application/sparql-results+json", :timeout_seconds=>30, :response_limit_bytes=>5242880}
TRIPOD: received response code: 200 in: 0.390161 secs
TRIPOD: 1761 bytes streamed in: 0.002473 secs
TRIPOD: total request time: 0.392842 secs
TRIPOD caching is off!
TRIPOD: About to run query: DESCRIBE ?uri WHERE { SELECT DISTINCT ?uri ?graph WHERE { GRAPH ?graph { ?uri a <http://ewi.mmlab.be/ns#StatisticCategory> . ?uri ?p ?o } } }
TRIPOD: Streaming fron url: http://ewi.mmlab.be/geo/
TRIPOD: Streaming opts: {:accept=>"application/n-triples", :timeout_seconds=>30, :response_limit_bytes=>5242880}
TRIPOD: received response code: 406 in: 0.212619 secs
Tripod::Errors::BadSparqlRequest: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>406 Not Acceptable</title>
</head><body>
<h1>406 Not Acceptable</h1>
<p>An appropriate representation of the requested resource sparql could not be found on this server.</p>
Available variant(s):
<ul>
<li><a href="sparql">sparql</a> , type text/turtle, charset UTF-8</li>
</ul>
</body></html>

    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/tripod-0.9.3/lib/tripod/streaming.rb:35:in `block in get_data'
    from /Users/gilj/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/http.rb:1323:in `block (2 levels) in transport_request'
    from /Users/gilj/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/http.rb:2672:in `reading_body'
    from /Users/gilj/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/http.rb:1322:in `block in transport_request'
    from /Users/gilj/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/http.rb:1317:in `catch'
    from /Users/gilj/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/http.rb:1317:in `transport_request'
    from /Users/gilj/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/http.rb:1294:in `request'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/rest-client-1.6.7/lib/restclient/net_http_ext.rb:51:in `request'
    from /Users/gilj/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/http.rb:1287:in `block in request'
    from /Users/gilj/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/http.rb:746:in `start'
    from /Users/gilj/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/http.rb:1285:in `request'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/rest-client-1.6.7/lib/restclient/net_http_ext.rb:51:in `request'
    from /Users/gilj/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/http.rb:1240:in `request_post'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/tripod-0.9.3/lib/tripod/streaming.rb:30:in `get_data'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/tripod-0.9.3/lib/tripod/sparql_client.rb:30:in `block in query'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/tripod-0.9.3/lib/tripod/sparql_client.rb:41:in `call'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/tripod-0.9.3/lib/tripod/sparql_client.rb:41:in `query'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/tripod-0.9.3/lib/tripod/finders.rb:184:in `_raw_describe_select_results'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/tripod-0.9.3/lib/tripod/finders.rb:164:in `_create_and_hydrate_resources_from_sparql'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/tripod-0.9.3/lib/tripod/finders.rb:135:in `_resources_from_sparql'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/tripod-0.9.3/lib/tripod/criteria/execution.rb:15:in `resources'
    from (irb):1
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/railties-3.2.12/lib/rails/commands/console.rb:47:in `start'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/railties-3.2.12/lib/rails/commands/console.rb:8:in `start'
    from /Users/gilj/.rvm/gems/ruby-1.9.3-p448/gems/railties-3.2.12/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'1.9.3p448 :002 >
@fonji
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fonji commented Apr 29, 2014

If it can be of any help, my fork uses text/plain instead of n-triples because my endpoint didn't support it either. Please note that I didn't include the latest commits yet.

Here's my issue.

@GilJ
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GilJ commented Apr 29, 2014

Thanks @fonji !

Sorry for not searching enough!

@GilJ GilJ closed this as completed Apr 29, 2014
@fonji
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fonji commented Apr 29, 2014

Quick update: I just merged my fork with the current version.

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@GilJ @fonji