blob: f8bde0f557f439c5999e8a03ce9bf413363c200d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
##
# 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
|
