mirror of
https://github.com/discourse/discourse.git
synced 2024-11-27 11:43:44 +08:00
372 lines
10 KiB
Ruby
372 lines
10 KiB
Ruby
require 'mini_racer'
|
|
require 'nokogiri'
|
|
require 'erb'
|
|
require_dependency 'url_helper'
|
|
require_dependency 'excerpt_parser'
|
|
require_dependency 'post'
|
|
require_dependency 'discourse_tagging'
|
|
require_dependency 'pretty_text/helpers'
|
|
|
|
module PrettyText
|
|
@mutex = Mutex.new
|
|
@ctx_init = Mutex.new
|
|
|
|
def self.app_root
|
|
Rails.root
|
|
end
|
|
|
|
def self.find_file(root, filename)
|
|
return filename if File.file?("#{root}#{filename}")
|
|
|
|
es6_name = "#{filename}.js.es6"
|
|
return es6_name if File.file?("#{root}#{es6_name}")
|
|
|
|
js_name = "#{filename}.js"
|
|
return js_name if File.file?("#{root}#{js_name}")
|
|
|
|
erb_name = "#{filename}.js.es6.erb"
|
|
return erb_name if File.file?("#{root}#{erb_name}")
|
|
end
|
|
|
|
def self.apply_es6_file(ctx, root_path, part_name)
|
|
filename = find_file(root_path, part_name)
|
|
if filename
|
|
source = File.read("#{root_path}#{filename}")
|
|
|
|
if filename =~ /\.erb$/
|
|
source = ERB.new(source).result(binding)
|
|
end
|
|
|
|
template = Tilt::ES6ModuleTranspilerTemplate.new {}
|
|
transpiled = template.module_transpile(source, "#{Rails.root}/app/assets/javascripts/", part_name)
|
|
ctx.eval(transpiled)
|
|
else
|
|
# Look for vendored stuff
|
|
vendor_root = "#{Rails.root}/vendor/assets/javascripts/"
|
|
filename = find_file(vendor_root, part_name)
|
|
if filename
|
|
ctx.eval(File.read("#{vendor_root}#{filename}"))
|
|
end
|
|
end
|
|
end
|
|
|
|
def self.create_es6_context
|
|
ctx = MiniRacer::Context.new(timeout: 15000)
|
|
|
|
ctx.eval("window = {}; window.devicePixelRatio = 2;") # hack to make code think stuff is retina
|
|
|
|
if Rails.env.development? || Rails.env.test?
|
|
ctx.attach("console.log", proc{|l| p l })
|
|
end
|
|
|
|
ctx_load(ctx, "vendor/assets/javascripts/loader.js")
|
|
ctx_load(ctx, "vendor/assets/javascripts/lodash.js")
|
|
manifest = File.read("#{Rails.root}/app/assets/javascripts/pretty-text-bundle.js")
|
|
root_path = "#{Rails.root}/app/assets/javascripts/"
|
|
manifest.each_line do |l|
|
|
l = l.chomp
|
|
if l =~ /\/\/= require (\.\/)?(.*)$/
|
|
apply_es6_file(ctx, root_path, Regexp.last_match[2])
|
|
elsif l =~ /\/\/= require_tree (\.\/)?(.*)$/
|
|
path = Regexp.last_match[2]
|
|
Dir["#{root_path}/#{path}/**"].sort.each do |f|
|
|
apply_es6_file(ctx, root_path, f.sub(root_path, '')[1..-1].sub(/\.js.es6$/, ''))
|
|
end
|
|
end
|
|
end
|
|
|
|
apply_es6_file(ctx, root_path, "discourse/lib/utilities")
|
|
|
|
PrettyText::Helpers.instance_methods.each do |method|
|
|
ctx.attach("__helpers.#{method}", PrettyText::Helpers.method(method))
|
|
end
|
|
ctx.load("#{Rails.root}/lib/pretty_text/shims.js")
|
|
ctx.eval("__setUnicode(#{Emoji.unicode_replacements_json})")
|
|
|
|
to_load = []
|
|
DiscoursePluginRegistry.each_globbed_asset do |a|
|
|
to_load << a if File.file?(a) && a =~ /discourse-markdown/
|
|
end
|
|
to_load.uniq.each do |f|
|
|
if f =~ /^.+assets\/javascripts\//
|
|
root = Regexp.last_match[0]
|
|
apply_es6_file(ctx, root, f.sub(root, '').sub(/\.js\.es6$/, ''))
|
|
end
|
|
end
|
|
|
|
ctx
|
|
end
|
|
|
|
def self.v8
|
|
return @ctx if @ctx
|
|
|
|
# ensure we only init one of these
|
|
@ctx_init.synchronize do
|
|
return @ctx if @ctx
|
|
@ctx = create_es6_context
|
|
end
|
|
|
|
@ctx
|
|
end
|
|
|
|
def self.reset_context
|
|
@ctx_init.synchronize do
|
|
@ctx = nil
|
|
end
|
|
end
|
|
|
|
def self.markdown(text, opts={})
|
|
# we use the exact same markdown converter as the client
|
|
# TODO: use the same extensions on both client and server (in particular the template for mentions)
|
|
baked = nil
|
|
text = text || ""
|
|
|
|
protect do
|
|
context = v8
|
|
|
|
paths = {
|
|
baseUri: Discourse::base_uri,
|
|
CDN: Rails.configuration.action_controller.asset_host,
|
|
}
|
|
|
|
if SiteSetting.enable_s3_uploads?
|
|
if SiteSetting.s3_cdn_url.present?
|
|
paths[:S3CDN] = SiteSetting.s3_cdn_url
|
|
end
|
|
paths[:S3BaseUrl] = Discourse.store.absolute_base_url
|
|
end
|
|
|
|
context.eval("__optInput = {};")
|
|
context.eval("__optInput.siteSettings = #{SiteSetting.client_settings_json};")
|
|
context.eval("__paths = #{paths.to_json};")
|
|
|
|
if opts[:topicId]
|
|
context.eval("__optInput.topicId = #{opts[:topicId].to_i};")
|
|
end
|
|
|
|
context.eval("__optInput.userId = #{opts[:user_id].to_i};") if opts[:user_id]
|
|
|
|
context.eval("__optInput.getURL = __getURL;")
|
|
context.eval("__optInput.getCurrentUser = __getCurrentUser;")
|
|
context.eval("__optInput.lookupAvatar = __lookupAvatar;")
|
|
context.eval("__optInput.getTopicInfo = __getTopicInfo;")
|
|
context.eval("__optInput.categoryHashtagLookup = __categoryLookup;")
|
|
context.eval("__optInput.mentionLookup = __mentionLookup;")
|
|
|
|
custom_emoji = {}
|
|
Emoji.custom.map {|e| custom_emoji[e.name] = e.url}
|
|
context.eval("__optInput.customEmoji = #{custom_emoji.to_json};")
|
|
|
|
context.eval('__textOptions = __buildOptions(__optInput);')
|
|
|
|
# Be careful disabling sanitization. We allow for custom emails
|
|
if opts[:sanitize] == false
|
|
context.eval('__textOptions.sanitize = false;')
|
|
end
|
|
|
|
opts = context.eval("__pt = new __PrettyText(__textOptions);")
|
|
|
|
DiscourseEvent.trigger(:markdown_context, context)
|
|
baked = context.eval("__pt.cook(#{text.inspect})")
|
|
end
|
|
|
|
if baked.blank? && !(opts || {})[:skip_blank_test]
|
|
# we may have a js engine issue
|
|
test = markdown("a", skip_blank_test: true)
|
|
if test.blank?
|
|
Rails.logger.warn("Markdown engine appears to have crashed, resetting context")
|
|
reset_context
|
|
opts ||= {}
|
|
opts = opts.dup
|
|
opts[:skip_blank_test] = true
|
|
baked = markdown(text, opts)
|
|
end
|
|
end
|
|
|
|
baked
|
|
end
|
|
|
|
# leaving this here, cause it invokes v8, don't want to implement twice
|
|
def self.avatar_img(avatar_template, size)
|
|
protect do
|
|
v8.eval("__utils.avatarImg({size: #{size.inspect}, avatarTemplate: #{avatar_template.inspect}}, __getURL);")
|
|
end
|
|
end
|
|
|
|
def self.unescape_emoji(title)
|
|
return title unless SiteSetting.enable_emoji?
|
|
|
|
set = SiteSetting.emoji_set.inspect
|
|
protect do
|
|
v8.eval("__performEmojiUnescape(#{title.inspect}, { getURL: __getURL, emojiSet: #{set} })")
|
|
end
|
|
end
|
|
|
|
def self.cook(text, opts={})
|
|
options = opts.dup
|
|
|
|
# we have a minor inconsistency
|
|
options[:topicId] = opts[:topic_id]
|
|
|
|
working_text = text.dup
|
|
sanitized = markdown(working_text, options)
|
|
|
|
doc = Nokogiri::HTML.fragment(sanitized)
|
|
|
|
if !options[:omit_nofollow] && SiteSetting.add_rel_nofollow_to_user_content
|
|
add_rel_nofollow_to_user_content(doc)
|
|
end
|
|
|
|
if SiteSetting.enable_s3_uploads && SiteSetting.s3_cdn_url.present?
|
|
add_s3_cdn(doc)
|
|
end
|
|
|
|
doc.to_html
|
|
end
|
|
|
|
def self.add_s3_cdn(doc)
|
|
doc.css("img").each do |img|
|
|
next unless img["src"]
|
|
img["src"] = Discourse.store.cdn_url(img["src"])
|
|
end
|
|
end
|
|
|
|
def self.add_rel_nofollow_to_user_content(doc)
|
|
whitelist = []
|
|
|
|
domains = SiteSetting.exclude_rel_nofollow_domains
|
|
whitelist = domains.split('|') if domains.present?
|
|
|
|
site_uri = nil
|
|
doc.css("a").each do |l|
|
|
href = l["href"].to_s
|
|
begin
|
|
uri = URI(href)
|
|
site_uri ||= URI(Discourse.base_url)
|
|
|
|
if !uri.host.present? ||
|
|
uri.host == site_uri.host ||
|
|
uri.host.ends_with?("." << site_uri.host) ||
|
|
whitelist.any?{|u| uri.host == u || uri.host.ends_with?("." << u)}
|
|
# we are good no need for nofollow
|
|
else
|
|
l["rel"] = "nofollow"
|
|
end
|
|
rescue URI::InvalidURIError, URI::InvalidComponentError
|
|
# add a nofollow anyway
|
|
l["rel"] = "nofollow"
|
|
end
|
|
end
|
|
end
|
|
|
|
class DetectedLink
|
|
attr_accessor :is_quote, :url
|
|
|
|
def initialize(url, is_quote=false)
|
|
@url = url
|
|
@is_quote = is_quote
|
|
end
|
|
end
|
|
|
|
|
|
def self.extract_links(html)
|
|
links = []
|
|
doc = Nokogiri::HTML.fragment(html)
|
|
# remove href inside quotes & elided part
|
|
doc.css("aside.quote a, .elided a").each { |l| l["href"] = "" }
|
|
|
|
# extract all links from the post
|
|
doc.css("a").each { |l|
|
|
unless l["href"].blank? || "#".freeze == l["href"][0]
|
|
links << DetectedLink.new(l["href"])
|
|
end
|
|
}
|
|
|
|
# extract links to quotes
|
|
doc.css("aside.quote[data-topic]").each do |a|
|
|
topic_id = a['data-topic']
|
|
|
|
url = "/t/topic/#{topic_id}"
|
|
if post_number = a['data-post']
|
|
url << "/#{post_number}"
|
|
end
|
|
|
|
links << DetectedLink.new(url, true)
|
|
end
|
|
|
|
links
|
|
end
|
|
|
|
def self.excerpt(html, max_length, options={})
|
|
# TODO: properly fix this HACK in ExcerptParser without introducing XSS
|
|
doc = Nokogiri::HTML.fragment(html)
|
|
strip_image_wrapping(doc)
|
|
html = doc.to_html
|
|
|
|
ExcerptParser.get_excerpt(html, max_length, options)
|
|
end
|
|
|
|
def self.strip_links(string)
|
|
return string if string.blank?
|
|
|
|
# If the user is not basic, strip links from their bio
|
|
fragment = Nokogiri::HTML.fragment(string)
|
|
fragment.css('a').each {|a| a.replace(a.inner_html) }
|
|
fragment.to_html
|
|
end
|
|
|
|
# Given a Nokogiri doc, convert all links to absolute
|
|
def self.make_all_links_absolute(doc)
|
|
site_uri = nil
|
|
doc.css("a").each do |link|
|
|
href = link["href"].to_s
|
|
begin
|
|
uri = URI(href)
|
|
site_uri ||= URI(Discourse.base_url)
|
|
link["href"] = "#{site_uri}#{link['href']}" unless uri.host.present?
|
|
rescue URI::InvalidURIError, URI::InvalidComponentError
|
|
# leave it
|
|
end
|
|
end
|
|
end
|
|
|
|
def self.strip_image_wrapping(doc)
|
|
doc.css(".lightbox-wrapper .meta").remove
|
|
end
|
|
|
|
def self.format_for_email(html, post = nil)
|
|
doc = Nokogiri::HTML.fragment(html)
|
|
DiscourseEvent.trigger(:reduce_cooked, doc, post)
|
|
strip_image_wrapping(doc)
|
|
make_all_links_absolute(doc)
|
|
doc.to_html
|
|
end
|
|
|
|
protected
|
|
|
|
class JavaScriptError < StandardError
|
|
attr_accessor :message, :backtrace
|
|
|
|
def initialize(message, backtrace)
|
|
@message = message
|
|
@backtrace = backtrace
|
|
end
|
|
|
|
end
|
|
|
|
def self.protect
|
|
rval = nil
|
|
@mutex.synchronize do
|
|
rval = yield
|
|
end
|
|
rval
|
|
end
|
|
|
|
def self.ctx_load(ctx, *files)
|
|
files.each do |file|
|
|
ctx.load(app_root + file)
|
|
end
|
|
end
|
|
|
|
end
|