闭社主体
forked from https://github.com/tootsuite/mastodon
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
137 lines
3.9 KiB
137 lines
3.9 KiB
# frozen_string_literal: true
|
|
|
|
module JsonLdHelper
|
|
def equals_or_includes?(haystack, needle)
|
|
haystack.is_a?(Array) ? haystack.include?(needle) : haystack == needle
|
|
end
|
|
|
|
def equals_or_includes_any?(haystack, needles)
|
|
needles.any? { |needle| equals_or_includes?(haystack, needle) }
|
|
end
|
|
|
|
def first_of_value(value)
|
|
value.is_a?(Array) ? value.first : value
|
|
end
|
|
|
|
# The url attribute can be a string, an array of strings, or an array of objects.
|
|
# The objects could include a mimeType. Not-included mimeType means it's text/html.
|
|
def url_to_href(value, preferred_type = nil)
|
|
single_value = begin
|
|
if value.is_a?(Array) && !value.first.is_a?(String)
|
|
value.find { |link| preferred_type.nil? || ((link['mimeType'].presence || 'text/html') == preferred_type) }
|
|
elsif value.is_a?(Array)
|
|
value.first
|
|
else
|
|
value
|
|
end
|
|
end
|
|
|
|
if single_value.nil? || single_value.is_a?(String)
|
|
single_value
|
|
else
|
|
single_value['href']
|
|
end
|
|
end
|
|
|
|
def as_array(value)
|
|
value.is_a?(Array) ? value : [value]
|
|
end
|
|
|
|
def value_or_id(value)
|
|
value.is_a?(String) || value.nil? ? value : value['id']
|
|
end
|
|
|
|
def supported_context?(json)
|
|
!json.nil? && equals_or_includes?(json['@context'], ActivityPub::TagManager::CONTEXT)
|
|
end
|
|
|
|
def unsupported_uri_scheme?(uri)
|
|
!uri.start_with?('http://', 'https://')
|
|
end
|
|
|
|
def invalid_origin?(url)
|
|
return true if unsupported_uri_scheme?(url)
|
|
|
|
needle = Addressable::URI.parse(url).host
|
|
haystack = Addressable::URI.parse(@account.uri).host
|
|
|
|
!haystack.casecmp(needle).zero?
|
|
end
|
|
|
|
def canonicalize(json)
|
|
graph = RDF::Graph.new << JSON::LD::API.toRdf(json, documentLoader: method(:load_jsonld_context))
|
|
graph.dump(:normalize)
|
|
end
|
|
|
|
def fetch_resource(uri, id, on_behalf_of = nil)
|
|
unless id
|
|
json = fetch_resource_without_id_validation(uri, on_behalf_of)
|
|
|
|
return unless json
|
|
|
|
uri = json['id']
|
|
end
|
|
|
|
json = fetch_resource_without_id_validation(uri, on_behalf_of)
|
|
json.present? && json['id'] == uri ? json : nil
|
|
end
|
|
|
|
def fetch_resource_without_id_validation(uri, on_behalf_of = nil, raise_on_temporary_error = false)
|
|
on_behalf_of ||= Account.representative
|
|
|
|
build_request(uri, on_behalf_of).perform do |response|
|
|
raise Mastodon::UnexpectedResponseError, response unless response_successful?(response) || response_error_unsalvageable?(response) || !raise_on_temporary_error
|
|
|
|
body_to_json(response.body_with_limit) if response.code == 200
|
|
end
|
|
end
|
|
|
|
def body_to_json(body, compare_id: nil)
|
|
json = body.is_a?(String) ? Oj.load(body, mode: :strict) : body
|
|
|
|
return if compare_id.present? && json['id'] != compare_id
|
|
|
|
json
|
|
rescue Oj::ParseError
|
|
nil
|
|
end
|
|
|
|
def merge_context(context, new_context)
|
|
if context.is_a?(Array)
|
|
context << new_context
|
|
else
|
|
[context, new_context]
|
|
end
|
|
end
|
|
|
|
def response_successful?(response)
|
|
(200...300).cover?(response.code)
|
|
end
|
|
|
|
def response_error_unsalvageable?(response)
|
|
response.code == 501 || ((400...500).cover?(response.code) && ![401, 408, 429].include?(response.code))
|
|
end
|
|
|
|
def build_request(uri, on_behalf_of = nil)
|
|
Request.new(:get, uri).tap do |request|
|
|
request.on_behalf_of(on_behalf_of) if on_behalf_of
|
|
request.add_headers('Accept' => 'application/activity+json, application/ld+json')
|
|
end
|
|
end
|
|
|
|
def load_jsonld_context(url, _options = {}, &_block)
|
|
json = Rails.cache.fetch("jsonld:context:#{url}", expires_in: 30.days, raw: true) do
|
|
request = Request.new(:get, url)
|
|
request.add_headers('Accept' => 'application/ld+json')
|
|
request.perform do |res|
|
|
raise JSON::LD::JsonLdError::LoadingDocumentFailed unless res.code == 200 && res.mime_type == 'application/ld+json'
|
|
|
|
res.body_with_limit
|
|
end
|
|
end
|
|
|
|
doc = JSON::LD::API::RemoteDocument.new(json, documentUrl: url)
|
|
|
|
block_given? ? yield(doc) : doc
|
|
end
|
|
end
|