module OEmbed
class Provider
attr_accessor :format, :name, :url, :urls, :endpoint
def initialize(endpoint, format = OEmbed::Formatters::DEFAULT)
@endpoint = endpoint
@urls = []
# Try to use the best available format
@format = OEmbed::Formatters.verify?(format)
end
def <<(url)
full, scheme, domain, path = *url.match(%r{([^:]*)://?([^/?]*)(.*)})
domain = Regexp.escape(domain).gsub("\\*", "(.*?)").gsub("(.*?)\\.", "([^\\.]+\\.)?")
path = Regexp.escape(path).gsub("\\*", "(.*?)")
@urls << Regexp.new("^#{Regexp.escape(scheme)}://#{domain}#{path}")
end
def build(url, options = {})
raise OEmbed::NotFound, url unless include?(url)
query = options.merge({:url => url})
endpoint = @endpoint.clone
if format_in_url?
format = endpoint["{format}"] = (query[:format] || @format).to_s
query.delete(:format)
else
format = query[:format] ||= @format
end
query_string = "?" + query.inject("") do |memo, (key, value)|
"#{key}=#{value}&#{memo}"
end.chop
URI.parse(endpoint + query_string).instance_eval do
@format = format; def format; @format; end
self
end
end
def raw(url, options = {})
uri = build(url, options)
res = Net::HTTP.start(uri.host, uri.port) do |http|
http.get(uri.request_uri)
end
case res
when Net::HTTPNotImplemented
raise OEmbed::UnknownFormat, uri.format
when Net::HTTPNotFound
raise OEmbed::NotFound, url
when Net::HTTPOK
res.body
else
raise OEmbed::UnknownResponse, res.code
end
end
def get(url, options = {})
options[:format] ||= @format if @format
OEmbed::Response.create_for(raw(url, options), self, options[:format])
end
def format_in_url?
@endpoint.include?("{format}")
end
def include?(url)
@urls.empty? || !!@urls.detect{ |u| u =~ url }
end
end
end
