Class: OauthUtil

Inherits:
Object
  • Object
show all
Defined in:
lib/oauth_util.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ OauthUtil

Returns a new instance of OauthUtil.



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# File 'lib/oauth_util.rb', line 24

def initialize
  @consumer_key = ''
  @consumer_secret = ''
  @token = ''
  @token_secret = ''
  @req_method = 'GET'
  @sig_method = 'HMAC-SHA1'
  @oauth_version = '1.0'
  @callback_url = ''
end

Instance Attribute Details

#base_str ⇒ Object

Returns the value of attribute base_str.



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# File 'lib/oauth_util.rb', line 21

def base_str
  @base_str
end

#callback_url ⇒ Object

Returns the value of attribute callback_url.



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# File 'lib/oauth_util.rb', line 21

def callback_url
  @callback_url
end

#consumer_key ⇒ Object

Returns the value of attribute consumer_key.



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# File 'lib/oauth_util.rb', line 21

def consumer_key
  @consumer_key
end

#consumer_secret ⇒ Object

Returns the value of attribute consumer_secret.



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# File 'lib/oauth_util.rb', line 21

def consumer_secret
  @consumer_secret
end

#oauth_version ⇒ Object

Returns the value of attribute oauth_version.



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# File 'lib/oauth_util.rb', line 21

def oauth_version
  @oauth_version
end

#params ⇒ Object

Returns the value of attribute params.



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# File 'lib/oauth_util.rb', line 21

def params
  @params
end

#req_method ⇒ Object

Returns the value of attribute req_method.



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# File 'lib/oauth_util.rb', line 21

def req_method
  @req_method
end

#req_url ⇒ Object

Returns the value of attribute req_url.



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# File 'lib/oauth_util.rb', line 21

def req_url
  @req_url
end

#sig_method ⇒ Object

Returns the value of attribute sig_method.



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# File 'lib/oauth_util.rb', line 21

def sig_method
  @sig_method
end

#token ⇒ Object

Returns the value of attribute token.



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# File 'lib/oauth_util.rb', line 21

def token
  @token
end

#token_secret ⇒ Object

Returns the value of attribute token_secret.



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# File 'lib/oauth_util.rb', line 21

def token_secret
  @token_secret
end

Instance Method Details

#nonce ⇒ Object

openssl::random_bytes returns non-word chars, which need to be removed. using alt method to get length ref snippets.dzone.com/posts/show/491



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# File 'lib/oauth_util.rb', line 37

def nonce
  Array.new( 5 ) { rand(256) }.pack('C*').unpack('H*').first
end

#percent_encode(string) ⇒ Object 



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# File 'lib/oauth_util.rb', line 41

def percent_encode( string )

  # ref http://snippets.dzone.com/posts/show/1260
  return URI.escape( string, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]") ).gsub('*', '%2A')
end

#query_string ⇒ Object

sort (very important as it affects the signature), concat, and percent encode



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# File 'lib/oauth_util.rb', line 63

def query_string
  pairs = []
  @params.sort.each { | key, val | 
    pairs.push( "#{ CGI.escape(key.to_s).gsub(/%(5B|5D)/n) { [$1].pack('H*') } }=#{ CGI.escape(val.to_s) }" )
  }
  pairs.join '&'
end

#sign(parsed_url) ⇒ Object

organize params & create signature



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# File 'lib/oauth_util.rb', line 72

def sign( parsed_url )

  @params = {
    'oauth_consumer_key' => @consumer_key,
    'oauth_nonce' => nonce,
    'oauth_signature_method' => @sig_method,
    'oauth_timestamp' => Time.now.to_i.to_s,
    'oauth_version' => @oauth_version
  }

  # if url has query, merge key/values into params obj overwriting defaults
  if parsed_url.query
    CGI.parse( parsed_url.query ).each do |k,v|
      if v.is_a?(Array) && v.count == 1
        @params[k] = v.first
      else
        @params[k] = v
      end
    end
  end

  # @ref http://oauth.net/core/1.0/#rfc.section.9.1.2
  @req_url = parsed_url.scheme + '://' + parsed_url.host + parsed_url.path

  # create base str. make it an object attr for ez debugging
  # ref http://oauth.net/core/1.0/#anchor14
  @base_str = [ 
    @req_method, 
    percent_encode( req_url ), 

    # normalization is just x-www-form-urlencoded
    percent_encode( query_string ) 

  ].join( '&' )

  # add signature
  @params[ 'oauth_signature' ] = signature

  return self
end

#signature ⇒ Object 



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# File 'lib/oauth_util.rb', line 48

def signature
  key = percent_encode( @consumer_secret ) + '&' + percent_encode( @token_secret )

  # ref: http://blog.nathanielbibler.com/post/63031273/openssl-hmac-vs-ruby-hmac-benchmarks
  digest = OpenSSL::Digest.new( 'sha1' )
  hmac = OpenSSL::HMAC.digest( digest, key, @base_str )

  # ref http://groups.google.com/group/oauth-ruby/browse_thread/thread/9110ed8c8f3cae81
  Base64.encode64( hmac ).chomp.gsub( /\n/, '' )
end