class Gem::Package::DigestIO

封装 IO，为写入被封装 IO 的内容创建摘要。

属性

收集封装写入的摘要。

{
  'SHA1'   => #<OpenSSL::Digest: [...]>,
  'SHA512' => #<OpenSSL::Digest: [...]>,
}

Public Class Methods

new (io, digests)

Source

# File lib/rubygems/package/digest_io.rb, line 46
def initialize(io, digests)
  @io = io
  @digests = digests
end

创建一个新的 DigestIO 实例。建议使用 ::wrap，请参阅 ::wrap 文档中关于 io 和 digests 的说明。

wrap (io, digests) { |digest_io| ... }

Source

# File lib/rubygems/package/digest_io.rb, line 34
def self.wrap(io, digests)
  digest_io = new io, digests

  yield digest_io

  digests
end

封装 io，并更新 digests Hash 中每个摘要算法的内容。返回摘要哈希。示例

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[...]"

Public Instance Methods

write (data)

Source

# File lib/rubygems/package/digest_io.rb, line 54
def write(data)
  result = @io.write data

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

  result
end

将 data 写入底层 IO 并更新摘要