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Edit File : digest_io.rb \| Size : 1.33 KB
# frozen_string_literal: true ## # IO wrapper that creates digests of contents written to the IO it wraps. class Gem::Package::DigestIO ## # Collected digests for wrapped writes. # # { # 'SHA1' => #<OpenSSL::Digest: [...]>, # 'SHA512' => #<OpenSSL::Digest: [...]>, # } attr_reader :digests ## # Wraps +io+ and updates digest for each of the digest algorithms in # the +digests+ Hash. Returns the digests hash. Example: # # io = StringIO.new # digests = { # 'SHA1' => OpenSSL::Digest.new('SHA1'), # 'SHA512' => OpenSSL::Digest.new('SHA512'), # } # # Gem::Package::DigestIO.wrap io, digests do \|digest_io\| # digest_io.write "hello" # end # # digests['SHA1'].hexdigest #=> "aaf4c61d[...]" # digests['SHA512'].hexdigest #=> "9b71d224[...]" def self.wrap(io, digests) digest_io = new io, digests yield digest_io return digests end ## # Creates a new DigestIO instance. Using ::wrap is recommended, see the # ::wrap documentation for documentation of +io+ and +digests+. def initialize(io, digests) @io = io @digests = digests end ## # Writes +data+ to the underlying IO and updates the digests def write(data) result = @io.write data @digests.each do \|_, digest\| digest << data end result end end Back

Edit File : digest_io.rb | Size : 1.33 KB

# frozen_string_literal: true

##
# IO wrapper that creates digests of contents written to the IO it wraps.

class Gem::Package::DigestIO
  ##
  # Collected digests for wrapped writes.
  #
  #   {
  #     'SHA1'   => #<OpenSSL::Digest: [...]>,
  #     'SHA512' => #<OpenSSL::Digest: [...]>,
  #   }

attr_reader :digests

##
  # Wraps +io+ and updates digest for each of the digest algorithms in
  # the +digests+ Hash.  Returns the digests hash.  Example:
  #
  #   io = StringIO.new
  #   digests = {
  #     'SHA1'   => OpenSSL::Digest.new('SHA1'),
  #     'SHA512' => OpenSSL::Digest.new('SHA512'),
  #   }
  #
  #   Gem::Package::DigestIO.wrap io, digests do |digest_io|
  #     digest_io.write "hello"
  #   end
  #
  #   digests['SHA1'].hexdigest   #=> "aaf4c61d[...]"
  #   digests['SHA512'].hexdigest #=> "9b71d224[...]"

def self.wrap(io, digests)
    digest_io = new io, digests

yield digest_io

return digests
  end

##
  # Creates a new DigestIO instance.  Using ::wrap is recommended, see the
  # ::wrap documentation for documentation of +io+ and +digests+.

def initialize(io, digests)
    @io = io
    @digests = digests
  end

##
  # Writes +data+ to the underlying IO and updates the digests

def write(data)
    result = @io.write data

@digests.each do |_, digest|
      digest << data
    end

result
  end
end

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