class OEmbed::ProviderDiscovery

Uses oEmbed Discover to generate a new Provider instance about a URL for which a Provider didn't previously exist.

Public Class Methods

discover_provider(url, options = {}) click to toggle source

Returns a new Provider instance based on information from oEmbed discovery performed on the given url.

The options Hash recognizes the following keys:

:format

If given only discover endpoints for the given format. If not format is given, use the first available format found.

:timeout

specifies the timeout (in seconds) for the http request.

:max_redirects

the number of times this request will follow 3XX redirects before throwing an error. Default: 4

# File lib/oembed/provider_discovery.rb, line 33
def discover_provider(url, options = {})
  uri = URI.parse(url)

  res = http_get(uri, options)
  format = options[:format]

  if format.nil? || format == :json
    provider_endpoint ||= /<link[^>]*href=['"]*([^\s'"]+)['"]*[^>]*application\/json\+oembed[^>]*>/.match(res)[1] rescue nil
    provider_endpoint ||= /<link[^>]*application\/json\+oembed[^>]*href=['"]*([^\s'"]+)['"]*[^>]*>/.match(res)[1] rescue nil
    format ||= :json if provider_endpoint
  end
  if format.nil? || format == :xml
    # {The specification}[http://oembed.com/#section4] says XML discovery should have
    # type="text/xml+oembed" but some providers use type="application/xml+oembed"
    provider_endpoint ||= /<link[^>]*href=['"]*([^\s'"]+)['"]*[^>]*(application|text)\/xml\+oembed[^>]*>/.match(res)[1] rescue nil
    provider_endpoint ||= /<link[^>]*(application|text)\/xml\+oembed[^>]*href=['"]*([^\s'"]+)['"]*[^>]*>/.match(res)[2] rescue nil
    format ||= :xml if provider_endpoint
  end

  begin
    provider_endpoint = URI.parse(provider_endpoint)
    provider_endpoint.query = nil
    provider_endpoint = provider_endpoint.to_s
  rescue URI::Error
    raise OEmbed::NotFound, url
  end

  Provider.new(provider_endpoint, format || OEmbed::Formatter.default)
end
get(url, query={}) click to toggle source

Discover the Provider for the given url, then call Provider#get on that provider. The query parameter will be passed to both discover_provider and Provider#get

# File lib/oembed/provider_discovery.rb, line 21
def get(url, query={})
  provider = discover_provider(url, query)
  provider.get(url, query)
end
raw(url, query={}) click to toggle source

Discover the Provider for the given url, then call Provider#raw on that provider. The query parameter will be passed to both discover_provider and Provider#raw @deprecated Note: This method will be made private in the future.

# File lib/oembed/provider_discovery.rb, line 14
def raw(url, query={})
  provider = discover_provider(url, query)
  provider.raw(url, query)
end