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sparql
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sparql
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#!/usr/bin/env ruby
require 'rubygems'
$:.unshift("../../lib", __FILE__)
require 'logger'
require 'sparql'
begin
require 'linkeddata'
rescue LoadError
require 'rdf/ntriples'
end
require 'getoptlong'
def display_results(res, **options)
puts res.inspect if options[:verbose]
puts case res
when RDF::Graph then res.dump(options.fetch(:format, :ttl), base_uri: query.base_uri, prefixes: query.prefixes, standard_prefixes: true)
when RDF::Literal then res.inspect
else
case options[:format]
when :json then res.to_json
when :html then res.to_html
when :xml then res.to_xml
when :csv then res.to_csv
when :tsv then res.to_tsv
else res.map {|s| s.bindings.map {|k,v| "#{k}: #{v}"}}.join("\n")
end
end
end
def run(input, **options)
if options[:debug]
puts "input graph:\n#{options[:dataset].dump(:trig, standard_prefixes: true)}\n" if options[:dataset]
puts "query:\n#{input}\n"
end
options[:dataset] ||= RDF::Repository.new
if options[:verbose]
puts ("\nSPARQL:\n" + input)
end
query = if options[:sse]
SPARQL::Algebra.parse(input, logger: options[:logger], update: options[:update])
else
# Only do grammar debugging if we're generating SSE
SPARQL::Grammar.parse(input, **options)
end
puts ("\nSSE:\n" + query.to_sse) if options[:debug] || options[:to_sse]
unless options[:to_sse]
res = query.execute(options[:dataset], logger: options[:logger])
display_results(res, **options)
end
end
def server(options)
require 'sinatra/sparql'
repository = options.fetch(:dataset, RDF::Repository.new)
app = Sinatra.new do
register Sinatra::SPARQL
set :repository, repository
before do
options[:logger].info "#{request.request_method} [#{request.path_info}], " +
params.merge(Accept: request.accept.map(&:to_s)).map {|k,v| "#{k}=#{v}" unless k.to_s == "content"}.join(" ")
end
get '/' do
if params["query"]
query = params["query"].to_s.match(/^http:/) ? RDF::Util::File.open_file(params["query"]) : ::CGI.unescape(params["query"].to_s)
SPARQL.execute(query, settings.repository)
else
settings.sparql_options.replace(standard_prefixes: true)
settings.sparql_options.merge!(:prefixes => {
ssd: "http://www.w3.org/ns/sparql-service-description#",
void: "http://rdfs.org/ns/void#"
})
service_description(repo: settings.repository, endpoint: url)
end
end
post '/' do
SPARQL.execute(params['query'], settings.repository)
end
end
Rack::Server.start(app: app, Port: options.fetch(:port, 9292))
rescue LoadError
$stderr.puts "Running SPARQL server requires Rack to be in environment: #{$!.message}"
end
def usage
puts "Usage: #{File.basename($0)} execute [options] query-file Execute a query against the specified dataset"
puts " #{File.basename($0)} parse [options] query-file Parse a query into SPARQL S-Expressions (SSE)"
puts " #{File.basename($0)} query [options] end-point query-file Run the query against a remote end-point"
puts " #{File.basename($0)} server [options] dataset-file Start a server initialized from the specified dataset"
puts "Options:"
puts " --dataset: File containing RDF graph or dataset"
puts " --debug: Display detailed debug output"
puts " --execute,-e: Use option argument as the SPARQL input if no query-file given"
puts " --format: Output format for results"
puts " --port,-p Port on which to run server; defaults to 9292"
puts " --sse: Query input is in SSE format"
puts " --update: Process query as a SPARQL Update"
puts " --verbose: Display details of processing"
puts " --help,-?: This message"
exit(0)
end
cmd, input = ARGV.shift, nil
opts = GetoptLong.new(
["--dataset", GetoptLong::REQUIRED_ARGUMENT],
["--debug", GetoptLong::NO_ARGUMENT],
["--execute", "-e", GetoptLong::REQUIRED_ARGUMENT],
["--format", GetoptLong::REQUIRED_ARGUMENT],
["--port", "-p", GetoptLong::REQUIRED_ARGUMENT],
["--sse", GetoptLong::NO_ARGUMENT],
["--update", GetoptLong::NO_ARGUMENT],
["--verbose", GetoptLong::NO_ARGUMENT],
["--help", "-?", GetoptLong::NO_ARGUMENT]
)
logger = Logger.new(STDERR)
logger.level = Logger::WARN
logger.formatter = lambda {|severity, datetime, progname, msg| "%5s %s\n" % [severity, msg]}
options = {
dataset: RDF::Repository.new,
logger: logger,
}
opts.each do |opt, arg|
case opt
when '--dataset' then options[:dataset].load(arg, rdfstar: true)
when '--debug' then options[:debug] = true ; logger.level = Logger::DEBUG
when '--execute' then input = arg
when '--format' then options[:format] = arg.to_sym
when '--port' then options[:port] = arg.to_i
when '--sse' then options[:sse] = true
when '--update' then options[:update] = true
when '--verbose' then options[:verbose] = true ; logger.level = Logger::INFO
when "--help" then usage
end
end
unless %w(execute query parse server help).include?(cmd)
$stderr.puts "Unrecognized command #{cmd}"
usage
end
case cmd
when 'execute', 'parse'
options[:to_sse] = true if cmd == 'parse'
input ||= ARGV.empty? ? $stdin.read : RDF::Util::File.open_file(ARGV.first).read
run(input, **options)
when 'query'
endpoint = ARGV.shift
unless endpoint
$stderr.puts "Expected SPARQL endpoint URL"
usage
end
input ||= ARGV.empty? ? $stdin.read : RDF::Util::File.open_file(ARGV.first).read
SPARQL::Client.new(endpoint) do |client|
res = client.query(input)
display_results(res, **options)
end
when 'server'
if data_file = ARGV.shift
options[:dataset] = RDF::Repository.load(data_file)
end
server(options)
else usage
end