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whippy-edition/app/services/fetch_atom_service.rb
Eugen Rochko 1618b68bfa HTTP signatures (#4146)
* Add Request class with HTTP signature generator

Spec: https://tools.ietf.org/html/draft-cavage-http-signatures-06

* Add HTTP signature verification concern

* Add test for SignatureVerification concern

* Add basic test for Request class

* Make PuSH subscribe/unsubscribe requests use new Request class

Accidentally fix lease_seconds not being set and sent properly, and
change the new minimum subscription duration to 1 day

* Make all PuSH workers use new Request class

* Make Salmon sender use new Request class

* Make FetchLinkService use new Request class

* Make FetchAtomService use the new Request class

* Make Remotable use the new Request class

* Make ResolveRemoteAccountService use the new Request class

* Add more tests

* Allow +-30 seconds window for signed request to remain valid

* Disable time window validation for signed requests, restore 7 days
as PuSH subscription duration (which was previous default due to a bug)
2017-07-14 20:41:49 +02:00

53 lines
1.6 KiB
Ruby

# frozen_string_literal: true
class FetchAtomService < BaseService
def call(url)
return if url.blank?
response = Request.new(:head, url).perform
Rails.logger.debug "Remote status HEAD request returned code #{response.code}"
response = Request.new(:get, url).perform if response.code == 405
Rails.logger.debug "Remote status GET request returned code #{response.code}"
return nil if response.code != 200
return [url, fetch(url)] if response.mime_type == 'application/atom+xml'
return process_headers(url, response) if response['Link'].present?
process_html(fetch(url))
rescue OpenSSL::SSL::SSLError => e
Rails.logger.debug "SSL error: #{e}"
nil
rescue HTTP::ConnectionError => e
Rails.logger.debug "HTTP ConnectionError: #{e}"
nil
end
private
def process_html(body)
Rails.logger.debug 'Processing HTML'
page = Nokogiri::HTML(body)
alternate_link = page.xpath('//link[@rel="alternate"]').find { |link| link['type'] == 'application/atom+xml' }
return nil if alternate_link.nil?
[alternate_link['href'], fetch(alternate_link['href'])]
end
def process_headers(url, response)
Rails.logger.debug 'Processing link header'
link_header = LinkHeader.parse(response['Link'].is_a?(Array) ? response['Link'].first : response['Link'])
alternate_link = link_header.find_link(%w(rel alternate), %w(type application/atom+xml))
return process_html(fetch(url)) if alternate_link.nil?
[alternate_link.href, fetch(alternate_link.href)]
end
def fetch(url)
Request.new(:get, url).perform.to_s
end
end