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Contents
module Onebox
class Preview
attr_reader :cache
# 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(link, parameters = Onebox.options)
@url = link
@options = parameters
@cache = options.cache
@engine_class = Matcher.new(@url).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 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::HTML::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)
Sanitize.fragment(html, @options[:sanitize_config] || Sanitize::Config::ONEBOX)
end
def engine
return nil unless @engine_class
return @engine if @engine
@engine = @engine_class.new(@url, cache)
@engine.options = @options
@engine
end
class InvalidURI < StandardError; end
end
end
Version data entries
21 entries across 21 versions & 1 rubygems