316 lines
9.8 KiB
Ruby
316 lines
9.8 KiB
Ruby
require 'v8'
|
|
require 'nokogiri'
|
|
|
|
module PrettyText
|
|
|
|
def self.whitelist
|
|
{
|
|
elements: %w[
|
|
a abbr aside b bdo blockquote br caption cite code col colgroup dd div del dfn dl
|
|
dt em hr figcaption figure h1 h2 h3 h4 h5 h6 hgroup i img ins kbd li mark
|
|
ol p pre q rp rt ruby s samp small span strike strong sub sup table tbody td
|
|
tfoot th thead time tr u ul var wbr
|
|
],
|
|
|
|
attributes: {
|
|
:all => ['dir', 'lang', 'title', 'class'],
|
|
'aside' => ['data-post', 'data-full', 'data-topic'],
|
|
'a' => ['href'],
|
|
'blockquote' => ['cite'],
|
|
'col' => ['span', 'width'],
|
|
'colgroup' => ['span', 'width'],
|
|
'del' => ['cite', 'datetime'],
|
|
'img' => ['align', 'alt', 'height', 'src', 'width'],
|
|
'ins' => ['cite', 'datetime'],
|
|
'ol' => ['start', 'reversed', 'type'],
|
|
'q' => ['cite'],
|
|
'span' => ['style'],
|
|
'table' => ['summary', 'width', 'style', 'cellpadding', 'cellspacing'],
|
|
'td' => ['abbr', 'axis', 'colspan', 'rowspan', 'width', 'style'],
|
|
'th' => ['abbr', 'axis', 'colspan', 'rowspan', 'scope', 'width', 'style'],
|
|
'time' => ['datetime', 'pubdate'],
|
|
'ul' => ['type']
|
|
},
|
|
|
|
protocols: {
|
|
'a' => {'href' => ['ftp', 'http', 'https', 'mailto', :relative]},
|
|
'blockquote' => {'cite' => ['http', 'https', :relative]},
|
|
'del' => {'cite' => ['http', 'https', :relative]},
|
|
'img' => {'src' => ['http', 'https', :relative]},
|
|
'ins' => {'cite' => ['http', 'https', :relative]},
|
|
'q' => {'cite' => ['http', 'https', :relative]}
|
|
}
|
|
}
|
|
end
|
|
|
|
|
|
class Helpers
|
|
# function here are available to v8
|
|
def avatar_template(username)
|
|
return "" unless username
|
|
|
|
user = User.where(username_lower: username.downcase).first
|
|
if user
|
|
user.avatar_template
|
|
end
|
|
end
|
|
|
|
def is_username_valid(username)
|
|
return false unless username
|
|
username = username.downcase
|
|
return User.exec_sql('select 1 from users where username_lower = ?', username).values.length == 1
|
|
end
|
|
end
|
|
|
|
@mutex = Mutex.new
|
|
|
|
def self.mention_matcher
|
|
Regexp.new("(\@[a-zA-Z0-9_]{#{User.username_length.begin},#{User.username_length.end}})")
|
|
end
|
|
|
|
def self.app_root
|
|
Rails.root
|
|
end
|
|
|
|
def self.v8
|
|
return @ctx unless @ctx.nil?
|
|
|
|
@ctx = V8::Context.new
|
|
|
|
@ctx["helpers"] = Helpers.new
|
|
|
|
@ctx.load(app_root + "app/assets/javascripts/external/md5.js")
|
|
@ctx.load(app_root + "app/assets/javascripts/external/Markdown.Converter.js")
|
|
@ctx.load(app_root + "app/assets/javascripts/external/twitter-text-1.5.0.js")
|
|
@ctx.load(app_root + "lib/headless-ember.js")
|
|
@ctx.load(app_root + "app/assets/javascripts/external/rsvp.js")
|
|
@ctx.load(Rails.configuration.ember.handlebars_location)
|
|
#@ctx.load(Rails.configuration.ember.ember_location)
|
|
|
|
@ctx.load(app_root + "app/assets/javascripts/external_production/sugar-1.3.5.js")
|
|
@ctx.eval("var Discourse = {}; Discourse.SiteSettings = #{SiteSetting.client_settings_json};")
|
|
@ctx.eval("var window = {}; window.devicePixelRatio = 2;") # hack to make code think stuff is retina
|
|
|
|
@ctx.load(app_root + "app/assets/javascripts/discourse/components/bbcode.js")
|
|
@ctx.load(app_root + "app/assets/javascripts/discourse/components/utilities.js")
|
|
@ctx.load(app_root + "app/assets/javascripts/discourse/components/markdown.js")
|
|
|
|
# Load server side javascripts
|
|
if DiscoursePluginRegistry.server_side_javascripts.present?
|
|
DiscoursePluginRegistry.server_side_javascripts.each do |ssjs|
|
|
@ctx.load(ssjs)
|
|
end
|
|
end
|
|
|
|
@ctx['quoteTemplate'] = File.open(app_root + 'app/assets/javascripts/discourse/templates/quote.js.shbrs') {|f| f.read}
|
|
@ctx['quoteEmailTemplate'] = File.open(app_root + 'lib/assets/quote_email.js.shbrs') {|f| f.read}
|
|
@ctx.eval("HANDLEBARS_TEMPLATES = {
|
|
'quote': Handlebars.compile(quoteTemplate),
|
|
'quote_email': Handlebars.compile(quoteEmailTemplate),
|
|
};")
|
|
@ctx
|
|
end
|
|
|
|
def self.markdown(text, opts=nil)
|
|
# 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
|
|
|
|
@mutex.synchronize do
|
|
# we need to do this to work in a multi site environment, many sites, many settings
|
|
v8.eval("Discourse.SiteSettings = #{SiteSetting.client_settings_json};")
|
|
v8.eval("Discourse.BaseUrl = 'http://#{RailsMultisite::ConnectionManagement.current_hostname}';")
|
|
v8.eval("Discourse.getURL = function(url) {return '#{Discourse::base_uri}' + url};")
|
|
v8['opts'] = opts || {}
|
|
v8['raw'] = text
|
|
v8.eval('opts["mentionLookup"] = function(u){return helpers.is_username_valid(u);}')
|
|
v8.eval('opts["lookupAvatar"] = function(p){return Discourse.Utilities.avatarImg({username: p, size: "tiny", avatarTemplate: helpers.avatar_template(p)});}')
|
|
baked = v8.eval('Discourse.Markdown.markdownConverter(opts).makeHtml(raw)')
|
|
end
|
|
|
|
# we need some minimal server side stuff, apply CDN and TODO filter disallowed markup
|
|
baked = apply_cdn(baked, Rails.configuration.action_controller.asset_host)
|
|
baked
|
|
end
|
|
|
|
# leaving this here, cause it invokes v8, don't want to implement twice
|
|
def self.avatar_img(username, size)
|
|
r = nil
|
|
@mutex.synchronize do
|
|
v8['username'] = username
|
|
v8['size'] = size
|
|
v8.eval("Discourse.SiteSettings = #{SiteSetting.client_settings_json};")
|
|
v8.eval("Discourse.CDN = '#{Rails.configuration.action_controller.asset_host}';")
|
|
v8.eval("Discourse.BaseUrl = '#{RailsMultisite::ConnectionManagement.current_hostname}';")
|
|
r = v8.eval("Discourse.Utilities.avatarImg({ username: username, size: size });")
|
|
end
|
|
r
|
|
end
|
|
|
|
def self.apply_cdn(html, url)
|
|
return html unless url
|
|
|
|
image = /\.(jpg|jpeg|gif|png|tiff|tif)$/
|
|
|
|
doc = Nokogiri::HTML.fragment(html)
|
|
doc.css("a").each do |l|
|
|
href = l.attributes["href"].to_s
|
|
if href[0] == '/' && href =~ image
|
|
l["href"] = url + href
|
|
end
|
|
end
|
|
doc.css("img").each do |l|
|
|
src = l.attributes["src"].to_s
|
|
if src[0] == '/'
|
|
l["src"] = url + src
|
|
end
|
|
end
|
|
|
|
doc.to_s
|
|
end
|
|
|
|
def self.cook(text, opts={})
|
|
cloned = opts.dup
|
|
# we have a minor inconsistency
|
|
cloned[:topicId] = opts[:topic_id]
|
|
sanitized = Sanitize.clean(markdown(text.dup, cloned), PrettyText.whitelist)
|
|
if SiteSetting.add_rel_nofollow_to_user_content
|
|
sanitized = add_rel_nofollow_to_user_content(sanitized)
|
|
end
|
|
sanitized
|
|
end
|
|
|
|
def self.add_rel_nofollow_to_user_content(html)
|
|
whitelist = []
|
|
|
|
l = SiteSetting.exclude_rel_nofollow_domains
|
|
if l.present?
|
|
whitelist = l.split(",")
|
|
end
|
|
|
|
site_uri = nil
|
|
doc = Nokogiri::HTML.fragment(html)
|
|
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.ends_with?(site_uri.host) ||
|
|
whitelist.any?{|u| uri.host.ends_with?(u)}
|
|
# we are good no need for nofollow
|
|
else
|
|
l["rel"] = "nofollow"
|
|
end
|
|
rescue URI::InvalidURIError
|
|
# add a nofollow anyway
|
|
l["rel"] = "nofollow"
|
|
end
|
|
end
|
|
doc.to_html
|
|
end
|
|
|
|
def self.extract_links(html)
|
|
doc = Nokogiri::HTML.fragment(html)
|
|
links = []
|
|
doc.css("a").each do |l|
|
|
links << l.attributes["href"].to_s
|
|
end
|
|
|
|
doc.css("aside.quote").each do |a|
|
|
topic_id = a.attributes['data-topic']
|
|
|
|
url = "/t/topic/#{topic_id}"
|
|
if post_number = a.attributes['data-post']
|
|
url << "/#{post_number}"
|
|
end
|
|
|
|
links << url
|
|
end
|
|
|
|
links
|
|
end
|
|
|
|
class ExcerptParser < Nokogiri::XML::SAX::Document
|
|
|
|
class DoneException < StandardError; end
|
|
|
|
attr_reader :excerpt
|
|
|
|
def initialize(length)
|
|
@length = length
|
|
@excerpt = ""
|
|
@current_length = 0
|
|
end
|
|
|
|
def self.get_excerpt(html, length)
|
|
me = self.new(length)
|
|
parser = Nokogiri::HTML::SAX::Parser.new(me)
|
|
begin
|
|
copy = "<div>"
|
|
copy << html unless html.nil?
|
|
copy << "</div>"
|
|
parser.parse(html) unless html.nil?
|
|
rescue DoneException
|
|
# we are done
|
|
end
|
|
me.excerpt
|
|
end
|
|
|
|
def start_element(name, attributes=[])
|
|
case name
|
|
when "img"
|
|
attributes = Hash[*attributes.flatten]
|
|
if attributes["alt"]
|
|
characters("[#{attributes["alt"]}]")
|
|
elsif attributes["title"]
|
|
characters("[#{attributes["title"]}]")
|
|
else
|
|
characters("[image]")
|
|
end
|
|
when "a"
|
|
c = "<a "
|
|
c << attributes.map{|k,v| "#{k}='#{v}'"}.join(' ')
|
|
c << ">"
|
|
characters(c, false, false, false)
|
|
@in_a = true
|
|
when "aside"
|
|
@in_quote = true
|
|
end
|
|
end
|
|
|
|
def end_element(name)
|
|
case name
|
|
when "a"
|
|
characters("</a>",false, false, false)
|
|
@in_a = false
|
|
when "p", "br"
|
|
characters(" ")
|
|
when "aside"
|
|
@in_quote = false
|
|
end
|
|
end
|
|
|
|
def characters(string, truncate = true, count_it = true, encode = true)
|
|
return if @in_quote
|
|
encode = encode ? lambda{|s| ERB::Util.html_escape(s)} : lambda {|s| s}
|
|
if @current_length + string.length > @length && count_it
|
|
@excerpt << encode.call(string[0..(@length-@current_length)-1]) if truncate
|
|
@excerpt << "…"
|
|
@excerpt << "</a>" if @in_a
|
|
raise DoneException.new
|
|
end
|
|
@excerpt << encode.call(string)
|
|
@current_length += string.length if count_it
|
|
end
|
|
end
|
|
|
|
def self.excerpt(html, length)
|
|
ExcerptParser.get_excerpt(html, length)
|
|
end
|
|
|
|
end
|
|
|