Fix URL linkifier grabbing full-width spaces and quotations (#9997)

Fix #9993
Fix #5654
master
Eugen Rochko 5 years ago committed by GitHub
parent a666d1e7ed
commit 016ad37bc8
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  1. 12
      app/lib/formatter.rb
  2. 4
      config/initializers/twitter_regex.rb
  3. 44
      spec/lib/formatter_spec.rb

@ -199,12 +199,22 @@ class Formatter
result.flatten.join
end
UNICODE_ESCAPE_BLACKLIST_RE = /\p{Z}|\p{P}/
def utf8_friendly_extractor(text, options = {})
old_to_new_index = [0]
escaped = text.chars.map do |c|
output = c.ord.to_s(16).length > 2 ? CGI.escape(c) : c
output = begin
if c.ord.to_s(16).length > 2 && UNICODE_ESCAPE_BLACKLIST_RE.match(c).nil?
CGI.escape(c)
else
c
end
end
old_to_new_index << old_to_new_index.last + output.length
output
end.join

@ -1,7 +1,7 @@
module Twitter
class Regex
REGEXEN[:valid_general_url_path_chars] = /[^\p{White_Space}\(\)\?]/iou
REGEXEN[:valid_url_path_ending_chars] = /[^\p{White_Space}\(\)\?!\*';:=\,\.\$%\[\]~&\|@]|(?:#{REGEXEN[:valid_url_balanced_parens]})/iou
REGEXEN[:valid_general_url_path_chars] = /[^\p{White_Space}<>\(\)\?]/iou
REGEXEN[:valid_url_path_ending_chars] = /[^\p{White_Space}\(\)\?!\*"'「」<>;:=\,\.\$%\[\]~&\|@]|(?:#{REGEXEN[:valid_url_balanced_parens]})/iou
REGEXEN[:valid_url_balanced_parens] = /
\(
(?:

@ -115,6 +115,22 @@ RSpec.describe Formatter do
end
end
context 'given a URL in quotation marks' do
let(:text) { '"https://example.com/"' }
it 'does not match the quotation marks' do
is_expected.to include 'href="https://example.com/"'
end
end
context 'given a URL in angle brackets' do
let(:text) { '<https://example.com/>' }
it 'does not match the angle brackets' do
is_expected.to include 'href="https://example.com/"'
end
end
context 'given a URL with Japanese path string' do
let(:text) { 'https://ja.wikipedia.org/wiki/日本' }
@ -131,6 +147,22 @@ RSpec.describe Formatter do
end
end
context 'given a URL with a full-width space' do
let(:text) { 'https://example.com/ abc123' }
it 'does not match the full-width space' do
is_expected.to include 'href="https://example.com/"'
end
end
context 'given a URL in Japanese quotation marks' do
let(:text) { '「[https://example.org/」' }
it 'does not match the quotation marks' do
is_expected.to include 'href="https://example.org/"'
end
end
context 'given a URL with Simplified Chinese path string' do
let(:text) { 'https://baike.baidu.com/item/中华人民共和国' }
@ -150,7 +182,11 @@ RSpec.describe Formatter do
context 'given a URL containing unsafe code (XSS attack, visible part)' do
let(:text) { %q{http://example.com/b<del>b</del>} }
it 'escapes the HTML in the URL' do
it 'does not include the HTML in the URL' do
is_expected.to include '"http://example.com/b"'
end
it 'escapes the HTML' do
is_expected.to include '&lt;del&gt;b&lt;/del&gt;'
end
end
@ -158,7 +194,11 @@ RSpec.describe Formatter do
context 'given a URL containing unsafe code (XSS attack, invisible part)' do
let(:text) { %q{http://example.com/blahblahblahblah/a<script>alert("Hello")</script>} }
it 'escapes the HTML in the URL' do
it 'does not include the HTML in the URL' do
is_expected.to include '"http://example.com/blahblahblahblah/a"'
end
it 'escapes the HTML' do
is_expected.to include '&lt;script&gt;alert(&quot;Hello&quot;)&lt;/script&gt;'
end
end

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