diff options
Diffstat (limited to 'lib/gitlab/git/encoding_helper.rb')
-rw-r--r-- | lib/gitlab/git/encoding_helper.rb | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/lib/gitlab/git/encoding_helper.rb b/lib/gitlab/git/encoding_helper.rb deleted file mode 100644 index f918074cb14..00000000000 --- a/lib/gitlab/git/encoding_helper.rb +++ /dev/null @@ -1,64 +0,0 @@ -module Gitlab - module Git - module EncodingHelper - extend self - - # This threshold is carefully tweaked to prevent usage of encodings detected - # by CharlockHolmes with low confidence. If CharlockHolmes confidence is low, - # we're better off sticking with utf8 encoding. - # Reason: git diff can return strings with invalid utf8 byte sequences if it - # truncates a diff in the middle of a multibyte character. In this case - # CharlockHolmes will try to guess the encoding and will likely suggest an - # obscure encoding with low confidence. - # There is a lot more info with this merge request: - # https://gitlab.com/gitlab-org/gitlab_git/merge_requests/77#note_4754193 - ENCODING_CONFIDENCE_THRESHOLD = 40 - - def encode!(message) - return nil unless message.respond_to? :force_encoding - - # if message is utf-8 encoding, just return it - message.force_encoding("UTF-8") - return message if message.valid_encoding? - - # return message if message type is binary - detect = CharlockHolmes::EncodingDetector.detect(message) - return message.force_encoding("BINARY") if detect && detect[:type] == :binary - - # force detected encoding if we have sufficient confidence. - if detect && detect[:encoding] && detect[:confidence] > ENCODING_CONFIDENCE_THRESHOLD - message.force_encoding(detect[:encoding]) - end - - # encode and clean the bad chars - message.replace clean(message) - rescue - encoding = detect ? detect[:encoding] : "unknown" - "--broken encoding: #{encoding}" - end - - def encode_utf8(message) - detect = CharlockHolmes::EncodingDetector.detect(message) - if detect - begin - CharlockHolmes::Converter.convert(message, detect[:encoding], 'UTF-8') - rescue ArgumentError => e - Rails.logger.warn("Ignoring error converting #{detect[:encoding]} into UTF8: #{e.message}") - - '' - end - else - clean(message) - end - end - - private - - def clean(message) - message.encode("UTF-16BE", undef: :replace, invalid: :replace, replace: "") - .encode("UTF-8") - .gsub("\0".encode("UTF-8"), "") - end - end - end -end |