112 lines
2.4 KiB
Ruby
112 lines
2.4 KiB
Ruby
# frozen_string_literal: true
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module Onebox
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class Preview
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# see https://bugs.ruby-lang.org/issues/14688
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client_exception =
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defined?(Net::HTTPClientException) ? Net::HTTPClientException : Net::HTTPServerException
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WEB_EXCEPTIONS = [
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client_exception,
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OpenURI::HTTPError,
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Timeout::Error,
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Net::HTTPError,
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Errno::ECONNREFUSED,
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]
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def initialize(url, options = Onebox.options)
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@url = url
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@options = options.dup
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allowed_origins = @options[:allowed_iframe_origins] || Onebox::Engine.all_iframe_origins
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@options[:allowed_iframe_regexes] = Engine.origins_to_regexes(allowed_origins)
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@engine_class = Matcher.new(@url, @options).oneboxed
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end
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def to_s
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return "" unless engine
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sanitize process_html engine_html
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rescue *WEB_EXCEPTIONS
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""
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end
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def placeholder_html
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return "" unless engine
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sanitize process_html engine.placeholder_html
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rescue *WEB_EXCEPTIONS
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""
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end
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def errors
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return {} unless engine
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engine.errors
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end
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def data
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return {} unless engine
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engine.data
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end
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def verified_data
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return {} unless engine
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engine.verified_data
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end
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def options
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OpenStruct.new(@options)
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end
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private
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def engine_html
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engine.to_html
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end
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def process_html(html)
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return "" unless html
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if @options[:max_width]
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doc = Nokogiri::HTML5.fragment(html)
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if doc
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doc
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.css("[width]")
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.each do |e|
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width = e["width"].to_i
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if width > @options[:max_width]
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height = e["height"].to_i
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if (height > 0)
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ratio = (height.to_f / width.to_f)
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e["height"] = (@options[:max_width] * ratio).floor
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end
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e["width"] = @options[:max_width]
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end
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end
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return doc.to_html
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end
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end
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html
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end
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def sanitize(html)
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config = @options[:sanitize_config] || SanitizeConfig::ONEBOX
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config = config.merge(allowed_iframe_regexes: @options[:allowed_iframe_regexes])
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Sanitize.fragment(html, config)
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end
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def engine
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return nil unless @engine_class
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return @engine if defined?(@engine)
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@engine = @engine_class.new(@url)
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@engine.options = @options
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@engine
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end
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class InvalidURI < StandardError
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end
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end
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end
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