Class: Recog::DB

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

Overview

A collection of fingerprints for matching against a particular kind of fingerprintable data, e.g. an HTTP Server header

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ DB

Returns a new instance of DB.

Parameters:

  • path (String) 


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# File 'lib/recog/db.rb', line 21

def initialize(path)
  @match_key = nil
  @path = path
  @fingerprints = []

  parse_fingerprints
end

Instance Attribute Details

#fingerprints ⇒ Array<Fingerprint> (readonly)

Returns Fingerprint objects that can be matched against strings that make sense for the #match_key.

Returns:



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# File 'lib/recog/db.rb', line 14

def fingerprints
  @fingerprints
end

#match_key ⇒ String (readonly)

Returns Taken from the fingerprints/matches element, or defaults to the basename of #path without the .xml extension.

Returns:

  • (String) —

    Taken from the fingerprints/matches element, or defaults to the basename of #path without the .xml extension.



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# File 'lib/recog/db.rb', line 18

def match_key
  @match_key
end

#path ⇒ String (readonly)

Returns:

  • (String) 


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# File 'lib/recog/db.rb', line 10

def path
  @path
end

Instance Method Details

#parse_fingerprints ⇒ void

This method returns an undefined value.



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# File 'lib/recog/db.rb', line 30

def parse_fingerprints
  xml = nil

  File.open(self.path, "rb") do |fd|
    xml = Nokogiri::XML(fd.read(fd.stat.size))
  end

  raise "#{self.path} is invalid XML: #{xml.errors.join(',')}" unless xml.errors.empty?

  xml.xpath("/fingerprints").each do |fbase|
    if fbase['matches']
      @match_key = fbase['matches'].to_s
    end
  end

  unless @match_key
    @match_key = File.basename(self.path).sub(/\.xml$/, '')
  end

  xml.xpath("/fingerprints/fingerprint").each do |fprint|
    @fingerprints << Fingerprint.new(fprint)
  end

  xml = nil
end