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OpenHandleCodeRuby
Ruby code examples for OpenHandle
OpenHandle Ruby Code Examples
It is expected that there could be an OpenHandle Ruby library but in the meantime OpenHandle can be accessed straightforwardly from native Ruby code.
Here's how a native Ruby program (contained in file "handler.rb") can grab a handle data record:
% cat handler.rb
#!/usr/bin/env ruby
require 'rubygems' # only if "json" lib installed as gem
require 'json'
require 'open-uri'
OPENHANDLE = "http://nascent.nature.com/openhandle/handle"
uri = URI.parse("#{OPENHANDLE}?id=#{ARGV[0]}&format=json")
json = uri.open.read
h = JSON.parse(json)
values = h['handleValues']
s = "The handle <#{h['handle']}>"
s += " has #{values.length} values:\n"
n_value = 0
values.each do |value|
n_value += 1
s += "\nvalue \##{n_value}:\n"
s += " index = #{value['index']}\n"
s += " type = #{value['type']}\n"
if value['data'].class == String
s += " data = #{value['data']}\n"
else
s += " data = [#{value['data'].class}]\n"
end
s += " permission = #{value['permission']}\n"
s += " ttl = #{value['ttl'].to_i / 3600} hours\n"
s += " timestamp = #{value['timestamp']}\n"
s += " reference = [#{value['reference'].class}]\n"
end
puts s
__END__
This can be run as:
% ruby handler.rb 10100/nature The handle <hdl:10100/nature> has 2 values: value #1: index = 100 type = HS_ADMIN data = [Hash] permission = 1110 ttl = 24 hours timestamp = Wed Feb 28 15:37:06 GMT 2007 reference = [Array] value #2: index = 1 type = URL data = http://www.nature.com/ permission = 1110 ttl = 24 hours timestamp = Wed Feb 28 15:37:06 GMT 2007 reference = [Array]
Or, alternatively, selecting only certain fields:
% ruby handler.rb 10.2277/0521853575 | grep data
data = http://prp.contentdirections.com/mr/cupress.jsp/doi=10.2277/0521853575
data = Odysseus Unbound
data = Full details about this book=http://www.cambridge.org/catalogue/catalogue.asp?isbn=0521853575&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = View Samples from this book=#
data = Table of contents=http://www.cambridge.org/catalogue/catalogue.asp?isbn=0521853575&ss=toc&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = Excerpt=http://www.cambridge.org/catalogue/catalogue.asp?isbn=0521853575&ss=exc&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = Index=http://www.cambridge.org/catalogue/catalogue.asp?isbn=0521853575&ss=ind&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = Copyright=http://www.cambridge.org/catalogue/catalogue.asp?isbn=0521853575&ss=cop&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = Frontmatter=http://www.cambridge.org/catalogue/catalogue.asp?isbn=0521853575&ss=fro&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = Buy this book=#
data = Customers in the UK, Europe, the Middle East and Africa!=!http://www.cambridge.org/uk/catalogue/AddToBasket.asp?qty=1&isbn=0521853575&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = Customers in the Americas=http://www.cambridge.org/us/catalogue/AddToBasket.asp?qty=1&isbn=0521853575&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = Customers in Australia and New Zealand!=!http://www.cambridge.org/aus/catalogue/AddToBasket.asp?qty=1&isbn=0521853575&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = Related subjects=#
data = Archaeology!=!http://www.cambridge.org/browse/browse_all.asp?subjectid=223&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = Classical Archaeology!=!http://www.cambridge.org/browse/browse_all.asp?subjectid=228&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = Classical Languages & Literature!=!http://www.cambridge.org/browse/browse_all.asp?subjectid=1009104&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = European Archaeology!=!http://www.cambridge.org/browse/browse_all.asp?subjectid=1008828&utm_source=DOI&utm_medium=MultiLink&utm_content=0521853575&utm_campaign=CDI
data = Related websites=#
data = Feature site!=!http://www.cambridge.org/bittlestone/
data = Cambridge University Press=http://www.cambridge.org/
data = { 1001 1002 { 1003 1004 1005 1006 1007 } 1008 { 1009 1010 1011 } 1012 { 1013 1014 1015 1016 } 1017 { 1018 } 1019 }
data = [Hash]
data = [Hash]
data = hdladmin@contentdirections.comHere's the same thing (contained in file "handler1.rb") which this time merely dumps the parsed JSON string.
% cat handler1.rb
#!/usr/bin/env ruby
require 'rubygems' # only if "json" lib installed as gem
require 'json'
require 'open-uri'
OPENHANDLE = "http://nascent.nature.com/openhandle/handle"
uri = URI.parse("#{OPENHANDLE}?id=#{ARGV[0]}&format=json")
json = uri.open.read
h = JSON.parse(json)
p h
__END__And this gives:
% ruby handler1.rb 10100/nature
{"handle"=>"hdl:10100/nature", "comment"=>"OpenHandle (JSON) - see
http://openhandle.googlecode.com/", "handleValues"=>[{"reference"=>[], "timestamp"=>"Wed
Feb 28 15:37:06 GMT 2007", "ttl"=>"+86400", "permission"=>"1110", "type"=>"HS_ADMIN",
"index"=>"100", "data"=>{"adminPermission"=>"111111111111",
"adminRef"=>"hdl:10100/nature?index=100"}}, {"reference"=>[], "timestamp"=>"Wed Feb 28
15:37:06 GMT 2007", "ttl"=>"+86400", "permission"=>"1110", "type"=>"URL", "index"=>"1",
"data"=>"http://www.nature.com/"}]}A fuller version of the handler (contained in file "handler2.rb") with support for querystrings is here:
% cat handler2.rb
#!/usr/bin/env ruby
require 'rubygems' # only if "json" lib installed as gem
require 'json'
require 'open-uri'
OPENHANDLE = "http://nascent.nature.com/openhandle/handle"
handle, querystring = ARGV[0].split('?')
handle.sub!(/^hdl:/, "")
args = {}
if querystring
querystring.split('&').each do |arg|
key, val = arg.split('=')
if args.has_key?(key)
args[key] << val
else
args[key] = [ val ]
end
end
end
begin
uri = URI.parse(OPENHANDLE + '?' + URI.encode("id=#{handle}&format=json"))
json = uri.open.read
h = JSON.parse(json)
values = h['handleValues']
n_value = 0
s = ""
values.each do |value|
n_value += 1
skip = false
if args.length > 0
skip = true
args.keys.each do |key|
if value.has_key?(key)
args[key].each do |val|
skip = false if value[key].to_s =~ /^#{val}$/i
end
end
end
end
next if skip
s += "\nvalue \##{n_value}:\n"
s += " index = #{value['index']}\n"
s += " type = #{value['type']}\n"
if value['data'].class == String
s += " data = #{value['data']}\n"
else
s += " data = [#{value['data'].class}]\n"
end
s += " permission = #{value['permission']}\n"
s += " ttl = #{value['ttl'].to_i / 3600} hours\n"
s += " timestamp = #{value['timestamp']}\n"
s += " reference = [#{value['reference'].class}]\n"
end
s1 = "The handle <hdl:#{handle}"
s1 += "?#{querystring}" unless querystring.nil?
s1 += "> has #{n_value} values (of #{values.length}):\n"
puts s1, s
rescue => e
puts "! Error reading handle \"#{handle}\""
puts "#{$!.inspect}\n\n"
puts "#{e.backtrace.join("\n")}\n\n"
end
__END__
{
"comment" : "OpenHandle (JSON) - see http://openhandle.googlecode.com/" ,
"handle" : "hdl:10100/nature" ,
"handleValues" : [
{
"index" : "100" ,
"type" : "HS_ADMIN" ,
"data" : {
"adminRef" : "hdl:10100/nature?index=100" ,
"adminPermission" : "111111111111"
} ,
"permission" : "1110" ,
"ttl" : "+86400" ,
"timestamp" : "Wed Feb 28 15:37:06 GMT 2007" ,
"reference" : {}
} ,
{
"index" : "1" ,
"type" : "URL" ,
"data" : "http://www.nature.com/" ,
"permission" : "1110" ,
"ttl" : "+86400" ,
"timestamp" : "Wed Feb 28 15:37:06 GMT 2007" ,
"reference" : {}
}
]
}And this can be invoked as
% handler.rb '10100/10.1038/nature06264?type=xmp' The handle <hdl:10100/10.1038/nature06264?type=xmp> has 1 values (of 3): value #2: index = 0 type = XMP data = http://nurture.nature.com/xmp/nature/n7169/xmp/nature06264.xmp permission = 1110 ttl = 24 hours timestamp = Sun Mar 09 16:49:52 GMT 2008 reference = [Array]
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