OEmbed support for PreviewCard (#2337)
* OEmbed support for PreviewCard * Improve ProviderDiscovery code failure treatment * Do not crawl links if there is a content warning, since those don't display a link card anyway * Reset db schema * Fresh migrate * Fix rubocop style issues Fix #1681 - return existing access token when applicable instead of creating new * Fix test * Extract http client to helper * Improve oembed controllerth-downstream
Eugen Rochko
8 years ago
committed by
GitHub
parent
279f34c797
commit
4a7dc4fadc
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# frozen_string_literal: true
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module HttpHelper
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USER_AGENT = "#{HTTP::Request::USER_AGENT} (Mastodon/#{Mastodon::VERSION}; +http://#{Rails.configuration.x.local_domain}/)"
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def http_client(options = {})
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timeout = { write: 10, connect: 10, read: 10 }.merge(options)
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HTTP.headers(user_agent: USER_AGENT)
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.timeout(:per_operation, timeout)
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.follow
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end
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end
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# frozen_string_literal: true
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class ProviderDiscovery < OEmbed::ProviderDiscovery
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include HttpHelper
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class << self
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def discover_provider(url, options = {})
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res = http_client.get(url)
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format = options[:format]
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raise OEmbed::NotFound, url if res.code != 200 || res.mime_type != 'text/html'
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html = Nokogiri::HTML(res.to_s)
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if format.nil? || format == :json
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provider_endpoint ||= html.at_xpath('//link[@type="application/json+oembed"]')&.attribute('href')&.value
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format ||= :json if provider_endpoint
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end
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if format.nil? || format == :xml
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provider_endpoint ||= html.at_xpath('//link[@type="application/xml+oembed"]')&.attribute('href')&.value
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format ||= :xml if provider_endpoint
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end
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begin
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provider_endpoint = Addressable::URI.parse(provider_endpoint)
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provider_endpoint.query = nil
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provider_endpoint = provider_endpoint.to_s
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rescue Addressable::URI::InvalidURIError
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raise OEmbed::NotFound, url
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end
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OEmbed::Provider.new(provider_endpoint, format || OEmbed::Formatter.default)
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end
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end
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end
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# frozen_string_literal: true
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class Sanitize
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module Config
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HTTP_PROTOCOLS ||= ['http', 'https', :relative].freeze
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MASTODON_STRICT ||= freeze_config(
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elements: %w(p br span a),
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attributes: {
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'a' => %w(href),
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'span' => %w(class),
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},
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protocols: {
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'a' => { 'href' => HTTP_PROTOCOLS },
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}
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)
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MASTODON_OEMBED ||= freeze_config merge(
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RELAXED,
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elements: RELAXED[:elements] + %w(audio embed iframe source video),
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attributes: merge(
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RELAXED[:attributes],
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'audio' => %w(controls),
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'embed' => %w(height src type width),
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'iframe' => %w(allowfullscreen frameborder height scrolling src width),
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'source' => %w(src type),
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'video' => %w(controls height loop width),
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'div' => [:data]
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),
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protocols: merge(
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RELAXED[:protocols],
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'embed' => { 'src' => HTTP_PROTOCOLS },
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'iframe' => { 'src' => HTTP_PROTOCOLS },
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'source' => { 'src' => HTTP_PROTOCOLS }
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)
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)
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end
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end
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@ -1,5 +1,7 @@
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object @card
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attributes :url, :title, :description
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attributes :url, :title, :description, :type,
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:author_name, :author_url, :provider_name,
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:provider_url, :html, :width, :height
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node(:image) { |card| card.image? ? full_asset_url(card.image.url(:original)) : nil }
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# frozen_string_literal: true
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require_relative '../../app/lib/provider_discovery'
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OEmbed::Providers.register_fallback(ProviderDiscovery)
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@ -0,0 +1,12 @@
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class AddOEmbedToPreviewCards < ActiveRecord::Migration[5.0]
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def change
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add_column :preview_cards, :type, :integer, default: 0, null: false
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add_column :preview_cards, :html, :text, null: false, default: ''
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add_column :preview_cards, :author_name, :string, null: false, default: ''
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add_column :preview_cards, :author_url, :string, null: false, default: ''
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add_column :preview_cards, :provider_name, :string, null: false, default: ''
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add_column :preview_cards, :provider_url, :string, null: false, default: ''
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add_column :preview_cards, :width, :integer, default: 0, null: false
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add_column :preview_cards, :height, :integer, default: 0, null: false
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end
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end
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