hometown/app/lib/provider_discovery.rb
Eugen Rochko 88725d6ce8 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 controller
2017-04-27 14:42:22 +02:00

37 lines
1.1 KiB
Ruby

# frozen_string_literal: true
class ProviderDiscovery < OEmbed::ProviderDiscovery
include HttpHelper
class << self
def discover_provider(url, options = {})
res = http_client.get(url)
format = options[:format]
raise OEmbed::NotFound, url if res.code != 200 || res.mime_type != 'text/html'
html = Nokogiri::HTML(res.to_s)
if format.nil? || format == :json
provider_endpoint ||= html.at_xpath('//link[@type="application/json+oembed"]')&.attribute('href')&.value
format ||= :json if provider_endpoint
end
if format.nil? || format == :xml
provider_endpoint ||= html.at_xpath('//link[@type="application/xml+oembed"]')&.attribute('href')&.value
format ||= :xml if provider_endpoint
end
begin
provider_endpoint = Addressable::URI.parse(provider_endpoint)
provider_endpoint.query = nil
provider_endpoint = provider_endpoint.to_s
rescue Addressable::URI::InvalidURIError
raise OEmbed::NotFound, url
end
OEmbed::Provider.new(provider_endpoint, format || OEmbed::Formatter.default)
end
end
end