251 lines
8.5 KiB
Ruby
251 lines
8.5 KiB
Ruby
# frozen_string_literal: true
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require "addressable"
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module Onebox
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module Helpers
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class DownloadTooLarge < StandardError; end
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IGNORE_CANONICAL_DOMAINS ||= ['www.instagram.com', 'medium.com', 'youtube.com']
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def self.symbolize_keys(hash)
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return {} if hash.nil?
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hash.inject({}) do |result, (key, value)|
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new_key = key.is_a?(String) ? key.to_sym : key
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new_value = value.is_a?(Hash) ? symbolize_keys(value) : value
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result[new_key] = new_value
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result
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end
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end
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def self.clean(html)
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html.gsub(/<[^>]+>/, ' ').gsub(/\n/, '')
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end
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def self.fetch_html_doc(url, headers = nil, body_cacher = nil)
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response = (fetch_response(url, headers: headers, body_cacher: body_cacher) rescue nil)
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doc = Nokogiri::HTML(response)
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uri = Addressable::URI.parse(url)
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ignore_canonical_tag = doc.at('meta[property="og:ignore_canonical"]')
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should_ignore_canonical = IGNORE_CANONICAL_DOMAINS.map { |hostname| uri.hostname.match?(hostname) }.any?
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unless (ignore_canonical_tag && ignore_canonical_tag['content'].to_s == 'true') || should_ignore_canonical
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# prefer canonical link
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canonical_link = doc.at('//link[@rel="canonical"]/@href')
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canonical_uri = Addressable::URI.parse(canonical_link)
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if canonical_link && canonical_uri && "#{canonical_uri.host}#{canonical_uri.path}" != "#{uri.host}#{uri.path}"
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uri = FinalDestination.new(canonical_link, Oneboxer.get_final_destination_options(canonical_link)).resolve
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if uri.present?
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response = (fetch_response(uri.to_s, headers: headers, body_cacher: body_cacher) rescue nil)
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doc = Nokogiri::HTML(response) if response
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end
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end
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end
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doc
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end
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def self.fetch_response(location, redirect_limit: 5, domain: nil, headers: nil, body_cacher: nil)
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redirect_limit = Onebox.options.redirect_limit if redirect_limit > Onebox.options.redirect_limit
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raise Net::HTTPError.new('HTTP redirect too deep', location) if redirect_limit == 0
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uri = Addressable::URI.parse(location)
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uri = Addressable::URI.join(domain, uri) if !uri.host
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use_body_cacher = body_cacher && body_cacher.respond_to?('fetch_cached_response_body')
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if use_body_cacher
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response_body = body_cacher.fetch_cached_response_body(uri.to_s)
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if response_body.present?
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return response_body
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end
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end
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result = StringIO.new
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FinalDestination::HTTP.start(uri.host, uri.port, open_timeout: Onebox.options.connect_timeout, use_ssl: uri.normalized_scheme == 'https') do |http|
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http.read_timeout = Onebox.options.timeout
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http.verify_mode = OpenSSL::SSL::VERIFY_NONE # Work around path building bugs
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headers ||= {}
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if Onebox.options.user_agent && !headers['User-Agent']
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headers['User-Agent'] = Onebox.options.user_agent
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end
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request = Net::HTTP::Get.new(uri.request_uri, headers)
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start_time = Time.now
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size_bytes = Onebox.options.max_download_kb * 1024
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http.request(request) do |response|
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if cookie = response.get_fields('set-cookie')
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# HACK: If this breaks again in the future, use HTTP::CookieJar from gem 'http-cookie'
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# See test: it "does not send cookies to the wrong domain"
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redir_header = { 'Cookie' => cookie.join('; ') }
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end
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redir_header = nil unless redir_header.is_a? Hash
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code = response.code.to_i
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unless code === 200
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response.error! unless [301, 302, 303, 307, 308].include?(code)
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return fetch_response(
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response['location'],
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redirect_limit: redirect_limit - 1,
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domain: "#{uri.scheme}://#{uri.host}",
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headers: redir_header
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)
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end
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response.read_body do |chunk|
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result.write(chunk)
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raise DownloadTooLarge.new if result.size > size_bytes
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raise Timeout::Error.new if (Time.now - start_time) > Onebox.options.timeout
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end
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if use_body_cacher && body_cacher.cache_response_body?(uri)
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body_cacher.cache_response_body(uri.to_s, result.string)
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end
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return result.string
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end
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end
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end
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def self.fetch_content_length(location)
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uri = URI(location)
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FinalDestination::HTTP.start(uri.host, uri.port, open_timeout: Onebox.options.connect_timeout, use_ssl: uri.is_a?(URI::HTTPS)) do |http|
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http.read_timeout = Onebox.options.timeout
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if uri.is_a?(URI::HTTPS)
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http.use_ssl = true
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http.verify_mode = OpenSSL::SSL::VERIFY_NONE
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end
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http.request_head([uri.path, uri.query].join("?")) do |response|
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code = response.code.to_i
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unless code === 200 || Onebox::Helpers.blank?(response.content_length)
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return nil
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end
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return response.content_length
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end
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end
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end
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def self.pretty_filesize(size)
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conv = [ 'B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB' ]
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scale = 1024
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ndx = 1
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if (size < 2 * (scale**ndx)) then
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return "#{(size)} #{conv[ndx - 1]}"
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end
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size = size.to_f
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[2, 3, 4, 5, 6, 7].each do |i|
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if (size < 2 * (scale**i)) then
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return "#{'%.2f' % (size / (scale**(i - 1)))} #{conv[i - 1]}"
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end
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end
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ndx = 7
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"#{'%.2f' % (size / (scale**(ndx - 1)))} #{conv[ndx - 1]}"
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end
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def self.click_to_scroll_div(width = 690, height = 400)
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"<div style=\"background:transparent;position:relative;width:#{width}px;height:#{height}px;top:#{height}px;margin-top:-#{height}px;\" onClick=\"style.pointerEvents='none'\"></div>"
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end
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def self.blank?(value)
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if value.nil?
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true
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elsif String === value
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value.empty? || !(/[[:^space:]]/ === value)
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else
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value.respond_to?(:empty?) ? !!value.empty? : !value
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end
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end
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def self.truncate(string, length = 50)
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return string if string.nil?
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string.size > length ? string[0...(string.rindex(" ", length) || length)] + "..." : string
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end
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def self.get(meta, attr)
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(meta && !blank?(meta[attr])) ? sanitize(meta[attr]) : nil
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end
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def self.sanitize(value, length = 50)
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return nil if blank?(value)
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Sanitize.fragment(value).strip
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end
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def self.normalize_url_for_output(url)
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return "" unless url
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url = url.dup
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# expect properly encoded url, remove any unsafe chars
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url.gsub!(' ', '%20')
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url.gsub!("'", "'")
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url.gsub!('"', """)
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url.gsub!(/[^\w\-`.~:\/?#\[\]@!$&'\(\)*+,;=%\p{M}’]/, "")
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parsed = Addressable::URI.parse(url)
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return "" unless parsed.host
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url
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end
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def self.get_absolute_image_url(src, url)
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begin
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URI.parse(url).merge(src).to_s
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rescue ArgumentError, URI::BadURIError, URI::InvalidURIError
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src
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end
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end
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# Percent-encodes a URI string per RFC3986 - https://tools.ietf.org/html/rfc3986
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def self.uri_encode(url)
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return "" unless url
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uri = Addressable::URI.parse(url)
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encoded_uri = Addressable::URI.new(
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scheme: Addressable::URI.encode_component(uri.scheme, Addressable::URI::CharacterClasses::SCHEME),
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authority: Addressable::URI.encode_component(uri.authority, Addressable::URI::CharacterClasses::AUTHORITY),
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path: Addressable::URI.encode_component(uri.path, Addressable::URI::CharacterClasses::PATH + "\\%"),
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query: Addressable::URI.encode_component(uri.query, "a-zA-Z0-9\\-\\.\\_\\~\\$\\&\\*\\,\\=\\:\\@\\?\\%"),
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fragment: Addressable::URI.encode_component(uri.fragment, "a-zA-Z0-9\\-\\.\\_\\~\\!\\$\\&\\'\\(\\)\\*\\+\\,\\;\\=\\:\\/\\?\\%")
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)
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encoded_uri.to_s
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end
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def self.uri_unencode(url)
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Addressable::URI.unencode(url)
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end
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def self.image_placeholder_html
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"<div class='onebox-placeholder-container'><span class='placeholder-icon image'></span></div>"
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end
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def self.video_placeholder_html
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"<div class='onebox-placeholder-container'><span class='placeholder-icon video'></span></div>"
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end
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def self.audio_placeholder_html
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"<div class='onebox-placeholder-container'><span class='placeholder-icon audio'></span></div>"
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end
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def self.map_placeholder_html
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"<div class='onebox-placeholder-container'><span class='placeholder-icon map'></span></div>"
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end
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def self.generic_placeholder_html
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"<div class='onebox-placeholder-container'><span class='placeholder-icon generic'></span></div>"
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end
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end
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end
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