Class: NVD::JSONFeeds::Meta

Inherits:
Object
  • Object
show all
Defined in:
lib/nvd/json_feeds/meta.rb

Overview

Represents the parsed contents of a .meta file.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(last_modified_date, size, zip_size, gz_size, sha256) ⇒ Meta

Initializes the feed metadata.

Parameters:

  • The parsed lastModifiedDate timestamp.

  • The size value.

  • The zipSize value.

  • The gzSize value.

  • The sha256 value.



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# File 'lib/nvd/json_feeds/meta.rb', line 56

def initialize(last_modified_date,size,zip_size,gz_size,sha256)
  @last_modified_date = last_modified_date

  @size     = size
  @zip_size = zip_size
  @gz_size  = gz_size
  @sha256   = sha256
end

Instance Attribute Details

#gz_size ⇒ Integer (readonly)

The size of the .gz feed file.

Returns:



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# File 'lib/nvd/json_feeds/meta.rb', line 30

def gz_size
  @gz_size
end

#last_modified_date ⇒ DateTime (readonly)

The date the feed file was last updated.

Returns:



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# File 'lib/nvd/json_feeds/meta.rb', line 15

def last_modified_date
  @last_modified_date
end

#sha256 ⇒ String (readonly)

Note:

NVD uses all upper-case SHA256 checksums.

The SHA256 checksum of the uncompressed .json feed file.

Returns:



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# File 'lib/nvd/json_feeds/meta.rb', line 36

def sha256
  @sha256
end

#size ⇒ Integer (readonly)

The size of the uncompressed .json feed file.

Returns:



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# File 'lib/nvd/json_feeds/meta.rb', line 20

def size
  @size
end

#zip_size ⇒ Integer (readonly)

The size of the .zip feed file.

Returns:



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# File 'lib/nvd/json_feeds/meta.rb', line 25

def zip_size
  @zip_size
end

Class Method Details

.parse(string) ⇒ Meta

Parses the text.

Parameters:

  • The raw meta string.

Returns:

  • The parsed meta information.

Raises:

  • The meta string was malformed.



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# File 'lib/nvd/json_feeds/meta.rb', line 77

def self.parse(string)
  last_modified_date = nil
  size     = nil
  zip_size = nil
  gz_size  = nil
  sha256   = nil

  string.each_line do |line|
    name, value = line.chomp.split(':',2)

    case name
    when 'lastModifiedDate'
      last_modified_date = DateTime.parse(value)
    when 'size'    then size     = value.to_i
    when 'zipSize' then zip_size = value.to_i
    when 'gzSize'  then gz_size  = value.to_i
    when 'sha256'  then sha256   = value
    end
  end

  unless last_modified_date
    raise(MetaParseError,"lastModifiedDate missing")
  end

  unless size
    raise(MetaParseError,"size entry missing")
  end

  unless zip_size
    raise(MetaParseError,"zipSize entry missing")
  end

  unless gz_size
    raise(MetaParseError,"gzSize entry missing")
  end

  unless sha256
    raise(MetaParseError,"sha256 entry missing")
  end

  return new(last_modified_date,size,zip_size,gz_size,sha256)
end