mirror of
https://github.com/discourse/discourse.git
synced 2024-11-30 09:14:36 +08:00
46176b7dd7
Currently we’re reopening the `Sanitize::Config` class (which is part of the `sanitize` gem) to put our custom config for Onebox in it. This is unnecessary as we can simply create a dedicated module to hold our custom configuration.
102 lines
2.4 KiB
Ruby
102 lines
2.4 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module Onebox
|
|
class Preview
|
|
# see https://bugs.ruby-lang.org/issues/14688
|
|
client_exception = defined?(Net::HTTPClientException) ? Net::HTTPClientException : Net::HTTPServerException
|
|
WEB_EXCEPTIONS ||= [client_exception, OpenURI::HTTPError, Timeout::Error, Net::HTTPError, Errno::ECONNREFUSED]
|
|
|
|
def initialize(url, options = Onebox.options)
|
|
@url = url
|
|
@options = options.dup
|
|
|
|
allowed_origins = @options[:allowed_iframe_origins] || Onebox::Engine.all_iframe_origins
|
|
@options[:allowed_iframe_regexes] = Engine.origins_to_regexes(allowed_origins)
|
|
|
|
@engine_class = Matcher.new(@url, @options).oneboxed
|
|
end
|
|
|
|
def to_s
|
|
return "" unless engine
|
|
sanitize process_html engine_html
|
|
rescue *WEB_EXCEPTIONS
|
|
""
|
|
end
|
|
|
|
def placeholder_html
|
|
return "" unless engine
|
|
sanitize process_html engine.placeholder_html
|
|
rescue *WEB_EXCEPTIONS
|
|
""
|
|
end
|
|
|
|
def errors
|
|
return {} unless engine
|
|
engine.errors
|
|
end
|
|
|
|
def data
|
|
return {} unless engine
|
|
engine.data
|
|
end
|
|
|
|
def verified_data
|
|
return {} unless engine
|
|
engine.verified_data
|
|
end
|
|
|
|
def options
|
|
OpenStruct.new(@options)
|
|
end
|
|
|
|
private
|
|
|
|
def engine_html
|
|
engine.to_html
|
|
end
|
|
|
|
def process_html(html)
|
|
return "" unless html
|
|
|
|
if @options[:max_width]
|
|
doc = Nokogiri::HTML5::fragment(html)
|
|
if doc
|
|
doc.css('[width]').each do |e|
|
|
width = e['width'].to_i
|
|
|
|
if width > @options[:max_width]
|
|
height = e['height'].to_i
|
|
if (height > 0)
|
|
ratio = (height.to_f / width.to_f)
|
|
e['height'] = (@options[:max_width] * ratio).floor
|
|
end
|
|
e['width'] = @options[:max_width]
|
|
end
|
|
end
|
|
return doc.to_html
|
|
end
|
|
end
|
|
|
|
html
|
|
end
|
|
|
|
def sanitize(html)
|
|
config = @options[:sanitize_config] || SanitizeConfig::ONEBOX
|
|
config = config.merge(allowed_iframe_regexes: @options[:allowed_iframe_regexes])
|
|
|
|
Sanitize.fragment(html, config)
|
|
end
|
|
|
|
def engine
|
|
return nil unless @engine_class
|
|
return @engine if defined?(@engine)
|
|
|
|
@engine = @engine_class.new(@url)
|
|
@engine.options = @options
|
|
@engine
|
|
end
|
|
|
|
class InvalidURI < StandardError; end
|
|
end
|
|
end
|