SecurityUpdate
This commit is contained in:
霧島ひなた
parent
4a2269092a
commit
09b4c05ce1
2
Gemfile
2
Gemfile
@ -96,6 +96,8 @@ gem 'json-ld', git: 'https://github.com/ruby-rdf/json-ld.git', ref: '345b7a57333
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gem 'json-ld-preloaded', '~> 3.0'
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gem 'rdf-normalize', '~> 0.3'
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gem 'redcarpet', "~> 3.4.0"
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group :development, :test do
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gem 'fabrication', '~> 2.20'
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gem 'fuubar', '~> 2.4'
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@ -496,6 +496,7 @@ GEM
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link_header (~> 0.0, >= 0.0.8)
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rdf-normalize (0.3.3)
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rdf (>= 2.2, < 4.0)
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redcarpet (3.4.0)
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redis (4.1.2)
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redis-actionpack (5.0.2)
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actionpack (>= 4.0, < 6)
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@ -755,6 +756,7 @@ DEPENDENCIES
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rails-i18n (~> 5.1)
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rails-settings-cached (~> 0.6)
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rdf-normalize (~> 0.3)
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redcarpet (~> 3.4.0)
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redis (~> 4.1)
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redis-namespace (~> 1.5)
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redis-rails (~> 5.0)
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@ -1,6 +1,7 @@
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# frozen_string_literal: true
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require 'singleton'
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require_relative './formatter_markdown'
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require_relative './sanitize_config'
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class Formatter
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@ -35,12 +36,21 @@ class Formatter
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linkable_accounts << status.account
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html = raw_content
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mdFormatter = Formatter_Markdown.new(html)
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html = mdFormatter.formatted
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html = "RT @#{prepend_reblog} #{html}" if prepend_reblog
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html = encode_and_link_urls(html, linkable_accounts)
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html = encode_custom_emojis(html, status.emojis, options[:autoplay]) if options[:custom_emojify]
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html = simple_format(html, {}, sanitize: false)
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html = html.delete("\n")
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mdLinkDecoder = MDLinkDecoder.new(html)
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html = mdLinkDecoder.decode
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html.gsub!(/(&)/){"&"}
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html.html_safe # rubocop:disable Rails/OutputSafety
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end
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@ -111,13 +121,18 @@ class Formatter
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def encode_and_link_urls(html, accounts = nil, options = {})
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entities = utf8_friendly_extractor(html, extract_url_without_protocol: false)
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mdExtractor = MDExtractor.new(html)
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entities.concat(mdExtractor.extractEntities)
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if accounts.is_a?(Hash)
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options = accounts
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accounts = nil
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end
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rewrite(html.dup, entities) do |entity|
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if entity[:url]
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if entity[:markdown]
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html[entity[:indices][0]...entity[:indices][1]]
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elsif entity[:url]
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link_to_url(entity, options)
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elsif entity[:hashtag]
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link_to_hashtag(entity)
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340
app/lib/formatter_markdown.rb
Normal file
340
app/lib/formatter_markdown.rb
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@ -0,0 +1,340 @@
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require 'uri'
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require 'redcarpet'
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require 'redcarpet/render_strip'
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class Formatter_Markdown
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def initialize(html)
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@html = html.dup
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end
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def formatted
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mdRenderer = CustomMDRenderer.new(
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strikethrough: true,
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hard_wrap: true,
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autolink: false,
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superscript:false,
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fenced_link: true,
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fenced_image: true,
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no_intra_emphasis: true,
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no_links: true,
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no_styles: true,
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no_images: true,
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filter_html: true,
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escape_html: true,
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safe_links_only: true,
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with_toc_data: true,
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xhtml: false,
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prettify: true,
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link_attributes: true
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)
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md = Redcarpet::Markdown.new(
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mdRenderer,
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strikethrough: true,
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hard_wrap: true,
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superscript:false,
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autolink: false,
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space_after_headers: true,
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no_intra_emphasis: true,
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no_links: true,
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no_styles: true,
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no_images: true,
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filter_html: true,
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escape_html: true,
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safe_links_only: true,
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with_toc_data: true,
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xhtml: false,
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prettify: true,
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link_attributes: true
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)
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s = @html
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s.gsub!(/\n[\n]+/) {"\n \n"}# 改行周りの問題を修正
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s.gsub!(/`[ ]+`/) {"｀ ｀"}# code内が半角スペースのみだとHTMLが壊れるのでそれの回避
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renderedMD = md.render(s)
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result = renderedMD
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result.gsub!(/(<\w+)([^>]*>)/) { "#{$1} data-md='true' #{$2}" }# ToDo data-md="true" を認識して他鯖の人にmarkdownの使用を伝える機能の実装
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result.gsub!(/(https?:\/\/[^<>"\[\] ]+)/){"#{$1} "}#URLの後ろにスペースをねじ込む奴 mastodonのURL認識がゆるいのをmarkdownで対処
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result
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end
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class CustomMDRenderer < Redcarpet::Render::HTML
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#基本的な実装の流れ
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#URLの削除(mastodonの機能上URLとして認識されると十中八九HTMLが壊れるので)
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#markdownコンテンツ内でのmarkdownコンテンツの禁止(意図しないHTMLタグの生成によってHTMLの不正出力を防ぐ目的)
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#最後にHTMLに出力される際にHTML的にヤバイ子たちのエスケープ
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def paragraph(text)
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%(#{text.strip})
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end
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def linebreak()
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%(<br>)
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end
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def block_quote(quote)
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urlRemoved = "#{remove_url(quote)}"
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escapedContents = "#{blockquote_markdown_escape(urlRemoved)}"
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%(<blockquote>#{escapedContents.strip}</blockquote>)
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end
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def header(text, header_level)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<h#{header_level}>#{encode(mdContentsRemoved)}</h#{header_level}>\n)
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end
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def codespan(code)
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urlRemoved = "#{remove_url(code)}"
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escapedCode = "#{escape_bbcode(urlRemoved)}"
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%(<code>#{encode(escapedCode)}</code>)
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end
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def list(contents, list_type)
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if list_type == :unordered
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%(<ul>#{contents.strip}</ul>)
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elsif list_type == :ordered
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%(<ol>#{contents.strip}</ol>)
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else
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%(<#{list_type}>#{contents.strip}</#{list_type}>)
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end
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end
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def list_item(text, list_type)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<li>#{encode(mdContentsRemoved)}</li>)
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end
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def emphasis(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<sup>#{encode(mdContentsRemoved)}</sup>)
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end
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def double_emphasis(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<sub>#{encode(mdContentsRemoved)}</sub>)
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end
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def triple_emphasis(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<small>#{encode(mdContentsRemoved)}</small>)
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end
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def strikethrough(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<s>#{encode(mdContentsRemoved)}</s>)
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end
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def superscript(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<sup>#{encode(mdContentsRemoved)}</sup>)
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end
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def underline(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<u>#{encode(mdContentsRemoved)}</u>)
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end
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def highlight(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<mark>#{encode(mdContentsRemoved)}</mark>)
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end
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#オートリンクはmastodonとの相性が悪いので基本的には使わない
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def autolink(link, link_type)
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%(<a herf="#{link}">リンク</a>)
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end
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#https以外の物がURLとして記入された時にTextをHTML的に考えて安全に表示するように変更
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def image(link, title, alt_text)
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if alt_text =~ /[<>"\[\] ]+/
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alt_text = "設定なし"
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end
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imgcheck = "#{link}"
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if imgcheck !~ /\Ahttps:\/\/[^<>"\[\] ]+\z/
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%(#{encode(alt_text)})
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else
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%(<img src="#{URI.encode_www_form_component(link)}">)
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end
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end
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def link(link, title, content)
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if content =~ /([<>"\[\] ]+|https?:\/\/|#|@)/
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content = "リンク"
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elsif content !~ /.+/
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content = "リンク"
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end
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linkcheck = "#{link}"
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if linkcheck !~ /\Ahttps:\/\/[^<>"\[\] ]+\z/
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%(#{encode(content)})
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else
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%(<a href="#{URI.encode_www_form_component(link)}">#{encode(content)}</a>)
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end
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end
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#ここから下はいろいろエスケープするための奴
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#HTML的に考えてよろしくない子たちをエスケープする奴
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def encode(html)
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HTMLEntities.new.encode(html)
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end
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#markdownコンテンツないでURLが生成されるのを防ぐためのエスケープする奴
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def remove_url(string)
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url = string.gsub(/https?:\/\//){ "URL:" }
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reply = url.gsub(/@/){ "＠" }
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hashTag = reply.gsub(/#/){ "＃" }
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end
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#前々から要望があったcode内でBBCodeを無効化するための奴
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def escape_bbcode(string)
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string.gsub(/\[/){ "［" }
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end
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#markdownの中でmarkdownを展開させないためのエスケープする奴
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#blockquote以外は下のが使える
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def markdown_escape(string)
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string.gsub(/<[^>]+>/) { "" }
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end
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#blockquoteコンテンツ内でblockquoteタグだけを許可するためのエスケープ
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def blockquote_markdown_escape(string)
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string.gsub(/<([\/]?a[^>]*|[\/]?img[^>]*|[\/]?code[^>]*|[\/]?h[1-6][^>]*|[\/]?sup[^>]*|[\/]?sub[^>]*|[\/]?small[^>]*|[\/]?ul[^>]*|[\/]?ol[^>]*|[\/]?li[^>]*|[\/]?hr[^>]*|[\/]?s[^>]*|[\/]?u[^>]*|[\/]?mark[^>]*)>/) { "" }
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end
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#テストで書きなぐった奴
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def html_escape(string)
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string.gsub(/['&\"<>\/]/, {
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'&' => '&',
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'<' => '<',
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'>' => '>',
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'"' => '"',
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"'" => ''',
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"/" => '/',
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})
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end
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end
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end
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#URLとかいう人類には早すぎたやばい子たちを大人しくするために必要な機構
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class MDLinkDecoder
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def initialize(html)
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@html = html.dup
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end
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def decode
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imageDecoded = @html.gsub(/<img data-md='true'\s+src="([^"]+)"([^>]*)>/) { "<a href=\"" + URI.decode_www_form_component($1) + "\"" + $2 + "><img data-md='true' src=\"" + URI.decode_www_form_component($1) + "\"" + $2 + "></a>" }
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imageDecoded.gsub(/<a data-md='true'\s+href="([^"]+)"([^>]*)>/) { "<a data-md='true' href=\"" + URI.decode_www_form_component($1) + "\"" + $2 + ">" }
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end
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end
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#エスケープを回避するHTMLタグの設定とかその他
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class MDExtractor
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def initialize(html)
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@html = html.dup
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end
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def extractEntities
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[
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extractByHTMLTagName("h1"),
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extractByHTMLTagName("h2"),
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extractByHTMLTagName("h3"),
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extractByHTMLTagName("h4"),
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extractByHTMLTagName("h5"),
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extractByHTMLTagName("h6"),
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extractByHTMLTagName("em"),
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extractByHTMLTagName("sup"),
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extractByHTMLTagName("sub"),
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extractByHTMLTagName("small"),
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extractByHTMLTagName("u"),
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extractByHTMLTagName("strong"),
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extractByHTMLTagName("ul", false, false, "li"),
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extractByHTMLTagName("ol", false, false, "li"),
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extractByHTMLTagName("code"),
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extractByHTMLTagName("blockquote", false),
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extractByHTMLTagName("hr", false, true),
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extractByHTMLTagName("br", false, true),
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extractByHTMLTagName("a"),
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extractByHTMLTagName("img", false, true),
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extractByHTMLTagName("s")
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].flatten.compact
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end
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def extractByHTMLTagName(tagName, isNoNest = true, isSingle = false, itemTagName = nil)
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entities = []
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@html.to_s.scan(htmlTagPatternByCond(tagName, isNoNest, isSingle, itemTagName)) do
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match = $~
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beginPos = match.char_begin(0)
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endPos = match.char_end(0)
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#puts "MDExtractor extracted with:\n" + @html + "\nbeginPos: " + beginPos.to_s + ", endPos: " + endPos.to_s + ", length: " + @html.length.to_s
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entity = {
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:markdown => true,
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:indices => [beginPos, endPos]
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}
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entities.push(entity)
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end
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entities
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end
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def htmlTagPatternByCond(tagName, isNoNest, isSingle, itemTagName)
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if isSingle
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htmlTagPatternSingle(tagName)
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elsif isNoNest
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htmlTagPatternNoNest(tagName)
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elsif itemTagName && itemTagName.length > 0
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htmlTagPatternOuterMostWithItem(tagName, itemTagName)
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else
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htmlTagPatternOuterMost(tagName)
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end
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end
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def htmlTagPattern(tagName)
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Regexp.compile("<#{tagName} data-md=[^>]*>(?:[^<]|<#{tagName} data-md=[^>]*>|<\\/#{tagName}>)*(?:<\\/#{tagName}>)*")
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end
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def htmlTagPatternNoNest(tagName)
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Regexp.compile("<#{tagName} data-md=[^>]*>(?:.|\n)*?<\\/#{tagName}>")
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end
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def htmlTagPatternSingle(tagName)
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Regexp.compile("<#{tagName} data-md=[^>]*>")
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end
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# https://stackoverflow.com/questions/546433/regular-expression-to-match-outer-brackets
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def htmlTagPatternOuterMost(tagName)
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Regexp.compile("<#{tagName} data-md=[^>]*>(?:[^<>]|(\\g<0>))*<\/#{tagName}>")
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end
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def htmlTagPatternOuterMostWithItem(tagName, itemTagName)
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Regexp.compile("<#{tagName} data-md=[^>]*>(?:[^<>]|<#{itemTagName} data-md=[^>]*>|<\\/#{itemTagName}>|(\\g<0>))*<\/#{tagName}>")
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end
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end
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