Class: MagicGzipValidator

Inherits:
Object
  • Object
show all
Defined in:
lib/logstash/inputs/mime/magic_gzip_validator.rb

Constant Summary collapse

VALID_STARTING_SIGNATURE = 
"1f8b"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file) ⇒ MagicGzipValidator

Returns a new instance of MagicGzipValidator.



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# File 'lib/logstash/inputs/mime/magic_gzip_validator.rb', line 7

def initialize(file)
  raise "Expecting a file object as an argument" unless file.is_a?(File)

  # Ensure there are sufficient number of bytes to determine the
  # signature.
  if file.stat.size < minimum_bytes_for_determining_signature
    puts "File too small to calculate signature"
    return false
  end

  @file = file
  process_file!
end

Instance Attribute Details

#file ⇒ Object (readonly)

Returns the value of attribute file.



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# File 'lib/logstash/inputs/mime/magic_gzip_validator.rb', line 2

def file
  @file
end

#starting_signature ⇒ Object (readonly)

Returns the value of attribute starting_signature.



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# File 'lib/logstash/inputs/mime/magic_gzip_validator.rb', line 3

def starting_signature
  @starting_signature
end

Instance Method Details

#starting_signature_bytes ⇒ Object 



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# File 'lib/logstash/inputs/mime/magic_gzip_validator.rb', line 21

def starting_signature_bytes
  2
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/logstash/inputs/mime/magic_gzip_validator.rb', line 25

def valid?
  @starting_signature == VALID_STARTING_SIGNATURE
end