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71 lines
1.9 KiB
71 lines
1.9 KiB
class FetchRemoteStatusService < BaseService
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def call(url)
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response = http_client.head(url)
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Rails.logger.debug "Remote status HEAD request returned code #{response.code}"
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return nil if response.code != 200
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if response.mime_type == 'application/atom+xml'
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return process_atom(url, fetch(url))
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elsif !response['Link'].blank?
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return process_headers(response)
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else
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return process_html(fetch(url))
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end
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end
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private
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def process_atom(url, body)
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Rails.logger.debug "Processing Atom for remote status"
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xml = Nokogiri::XML(body)
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account = extract_author(url, xml)
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return nil if account.nil?
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statuses = ProcessFeedService.new.(body, account)
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return statuses.first
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end
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def process_html(body)
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Rails.logger.debug "Processing HTML for remote status"
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page = Nokogiri::HTML(body)
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alternate_link = page.xpath('//link[@rel="alternate"]').find { |link| link['type'] == 'application/atom+xml' }
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return nil if alternate_link.nil?
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return process_atom(alternate_link['href'], fetch(alternate_link['href']))
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end
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def process_headers(response)
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Rails.logger.debug "Processing link header for remote status"
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link_header = LinkHeader.parse(response['Link'])
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alternate_link = link_header.find_link(['rel', 'alternate'], ['type', 'application/atom+xml'])
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return nil if alternate_link.nil?
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return process_atom(alternate_link.href, fetch(alternate_link.href))
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end
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def extract_author(url, xml)
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url_parts = Addressable::URI.parse(url)
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username = xml.at_xpath('//xmlns:author/xmlns:name').try(:content)
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domain = url_parts.host
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return nil if username.nil?
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Rails.logger.debug "Going to webfinger #{username}@#{domain}"
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return FollowRemoteAccountService.new.("#{username}@#{domain}")
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end
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def fetch(url)
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http_client.get(url).to_s
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end
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def http_client
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HTTP.timeout(:per_operation, write: 20, connect: 20, read: 50)
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end
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end
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