Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Fix performance issue caused by using repeated > characters inside <!DOCTYPE name [<!ENTITY>]> #175

Merged
merged 2 commits into from
Jul 16, 2024
Merged

Fix performance issue caused by using repeated > characters inside <!DOCTYPE name [<!ENTITY>]> #175

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
c8fa85a
Fix performance issue caused by using repeated `>` characters inside …
Watson1978 Jul 11, 2024
4a34d6f
Remove redundant "entity"
kou Jul 16, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 6 additions & 2 deletions lib/rexml/parsers/baseparser.rb
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -124,11 +124,15 @@ class BaseParser
}

module Private
INSTRUCTION_END = /#{NAME}(\s+.*?)?\?>/um
# Terminal requires two or more letters.
INSTRUCTION_TERM = "?>"
COMMENT_TERM = "-->"
CDATA_TERM = "]]>"
DOCTYPE_TERM = "]>"
# Read to the end of DOCTYPE because there is no proper ENTITY termination
ENTITY_TERM = DOCTYPE_TERM

INSTRUCTION_END = /#{NAME}(\s+.*?)?\?>/um
TAG_PATTERN = /((?>#{QNAME_STR}))\s*/um
CLOSE_PATTERN = /(#{QNAME_STR})\s*>/um
ATTLISTDECL_END = /\s+#{NAME}(?:#{ATTDEF})*\s*>/um
Expand Down Expand Up @@ -313,7 +317,7 @@ def pull_event
raise REXML::ParseException.new( "Bad ELEMENT declaration!", @source ) if md.nil?
return [ :elementdecl, "<!ELEMENT" + md[1] ]
elsif @source.match("ENTITY", true)
match = [:entitydecl, *@source.match(Private::ENTITYDECL_PATTERN, true).captures.compact]
match = [:entitydecl, *@source.match(Private::ENTITYDECL_PATTERN, true, term: Private::ENTITY_TERM).captures.compact]
ref = false
if match[1] == '%'
ref = true
Expand Down
7 changes: 7 additions & 0 deletions test/parse/test_entity_declaration.rb
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -32,5 +32,12 @@ def test_empty
<!ENTITY> ]> <r/>
DETAIL
end

def test_gt_linear_performance
seq = [10000, 50000, 100000, 150000, 200000]
assert_linear_performance(seq, rehearsal: 10) do |n|
REXML::Document.new('<!DOCTYPE rubynet [<!ENTITY rbconfig.ruby_version "' + '>' * n + '">')
end
end
end
end
Loading