Class: NVDFeedScraper::Meta

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

Overview

Manage the meta file from a feed.

== Usage

Several ways to set the url:

m = NVDFeedScraper::Meta.new(metaUrl)
m.parse

or

m = NVDFeedScraper::Meta.new
m.url = metaUrl
m.parse

or

m = NVDFeedScraper::Meta.new
m.parse(metaUrl)

Examples:

s = NVDFeedScraper.new
s.scrap
metaUrl = s.feeds("CVE-2014").meta_url
m = NVDFeedScraper::Meta.new
m.url = metaUrl
m.parse
m.sha256

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url = nil) ⇒ Meta

Returns a new instance of Meta.

Parameters:



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# File 'lib/nvd_feed_api/meta.rb', line 63

def initialize(url = nil)
  @url = url
end

Instance Attribute Details

#gz_size ⇒ String (readonly)

NVDFeedScraper::Meta gz size getter

Examples:

'2008357'

Returns:

  • (String) —

    the size of the gz file.



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# File 'lib/nvd_feed_api/meta.rb', line 54

def gz_size
  @gz_size
end

#last_modified_date ⇒ String (readonly)

NVDFeedScraper::Meta last modified date getter

Examples:

'2017-10-19T03:27:02-04:00'

Returns:

  • (String) —

    the last modified date and time.



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# File 'lib/nvd_feed_api/meta.rb', line 36

def last_modified_date
  @last_modified_date
end

#sha256 ⇒ String (readonly)

NVDFeedScraper::Meta JSON sha256 getter

Examples:

'33ED52D451692596D644F23742ED42B4E350258B11ACB900F969F148FCE3777B'

Returns:

  • (String) —

    the SHA256 value of the uncompressed JSON file.



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# File 'lib/nvd_feed_api/meta.rb', line 60

def sha256
  @sha256
end

#size ⇒ String (readonly)

NVDFeedScraper::Meta JSON size getter

Examples:

'29443314'

Returns:

  • (String) —

    the size of the JSON file uncompressed.



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# File 'lib/nvd_feed_api/meta.rb', line 42

def size
  @size
end

#url ⇒ String

NVDFeedScraper::Meta URL getter.

Returns:

  • (String) —

    The URL of the meta file of the feed.



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# File 'lib/nvd_feed_api/meta.rb', line 69

def url
  @url
end

#zip_size ⇒ String (readonly)

NVDFeedScraper::Meta zip size getter

Examples:

'2008493'

Returns:

  • (String) —

    the size of the zip file.



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# File 'lib/nvd_feed_api/meta.rb', line 48

def zip_size
  @zip_size
end

Instance Method Details

#parse ⇒ Integer #parse(url) ⇒ Integer

Parse the meta file from the URL and set the attributes.

Overloads:

  • #parse ⇒ Integer

    Parse the meta file from the URL and set the attributes.

    Returns:

    • (Integer) —

      Returns 0 when there is no error.

  • #parse(url) ⇒ Integer

    Set the URL of the meta file of the feed and
    parse the meta file from the URL and set the attributes.

    Parameters:

    Returns:

    • (Integer) —

      Returns 0 when there is no error.



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# File 'lib/nvd_feed_api/meta.rb', line 87

def parse(*arg)
  if arg.length == 1 # arg = url
    self.url = arg[0]
  elsif arg.length > 1
    raise 'Too much arguments'
  end

  raise "Can't parse if the URL is empty" if @url.nil?

  uri = URI(@url)

  meta = Net::HTTP.get(uri)

  meta = meta.split.to_h { |x| x.split(':', 2) }

  raise 'no lastModifiedDate attribute found' unless meta['lastModifiedDate']
  raise 'no valid size attribute found' unless /[0-9]+/.match?(meta['size'])
  raise 'no valid zipSize attribute found' unless /[0-9]+/.match?(meta['zipSize'])
  raise 'no valid gzSize attribute found' unless /[0-9]+/.match?(meta['gzSize'])
  raise 'no valid sha256 attribute found' unless /[0-9A-F]{64}/.match?(meta['sha256'])

  @last_modified_date = meta['lastModifiedDate']
  @size = meta['size']
  @zip_size = meta['zipSize']
  @gz_size = meta['gzSize']
  @sha256 = meta['sha256']

  0
end