mirror of
https://github.com/discourse/discourse.git
synced 2024-11-30 19:15:32 +08:00
6ab12ed96b
Meta thread: https://meta.discourse.org/t/sending-a-pm-with-the-following-title-causes-an-error/135654/3 We had an issue where if someone sent a PM with crazy characters that are stripped and we end up with only a number, the topic redirect errored because the slug was a number. so instead we return the default as well if the slug is a number after prettification
71 lines
2.0 KiB
Ruby
71 lines
2.0 KiB
Ruby
# encoding: utf-8
|
|
# frozen_string_literal: true
|
|
|
|
module Slug
|
|
|
|
CHAR_FILTER_REGEXP = /[:\/\?#\[\]@!\$&'\(\)\*\+,;=_\.~%\\`^\s|\{\}"<>]+/ # :/?#[]@!$&'()*+,;=_.~%\`^|{}"<>
|
|
MAX_LENGTH = 255
|
|
|
|
def self.for(string, default = 'topic', max_length = MAX_LENGTH)
|
|
string = string.gsub(/:([\w\-+]+(?::t\d)?):/, '') if string.present? # strip emoji strings
|
|
|
|
if SiteSetting.slug_generation_method == 'encoded'
|
|
max_length = 9999 # do not truncate encoded slugs
|
|
end
|
|
|
|
slug =
|
|
case (SiteSetting.slug_generation_method || :ascii).to_sym
|
|
when :ascii then self.ascii_generator(string)
|
|
when :encoded then self.encoded_generator(string)
|
|
when :none then self.none_generator(string)
|
|
end
|
|
slug = self.prettify_slug(slug, max_length: max_length)
|
|
(slug.blank? || slug_is_only_numbers?(slug)) ? default : slug
|
|
end
|
|
|
|
def self.sanitize(string, downcase: false, max_length: MAX_LENGTH)
|
|
slug = self.encoded_generator(string, downcase: downcase)
|
|
self.prettify_slug(slug, max_length: max_length)
|
|
end
|
|
|
|
private
|
|
|
|
def self.slug_is_only_numbers?(slug)
|
|
(slug =~ /[^\d]/).blank?
|
|
end
|
|
|
|
def self.prettify_slug(slug, max_length:)
|
|
# Reject slugs that only contain numbers, because they would be indistinguishable from id's.
|
|
slug = (slug_is_only_numbers?(slug) ? '' : slug)
|
|
|
|
slug
|
|
.tr("_", "-")
|
|
.truncate(max_length, omission: '')
|
|
.squeeze('-') # squeeze continuous dashes to prettify slug
|
|
.gsub(/\A-+|-+\z/, '') # remove possible trailing and preceding dashes
|
|
end
|
|
|
|
def self.ascii_generator(string)
|
|
I18n.with_locale(SiteSetting.default_locale) do
|
|
string.tr("'", "").parameterize
|
|
end
|
|
end
|
|
|
|
def self.encoded_generator(string, downcase: true)
|
|
# This generator will sanitize almost all special characters,
|
|
# including reserved characters from RFC3986.
|
|
# See also URI::REGEXP::PATTERN.
|
|
string = string.strip
|
|
.gsub(/\s+/, '-')
|
|
.gsub(CHAR_FILTER_REGEXP, '')
|
|
|
|
string = string.downcase if downcase
|
|
|
|
CGI.escape(string)
|
|
end
|
|
|
|
def self.none_generator(string)
|
|
''
|
|
end
|
|
end
|