openid_fetch_fix.rb

require 'openid'
require 'net/http'
require 'appengine-apis/urlfetch'

class MyFetcher < OpenID::StandardFetcher
  def fetch(url, body=nil, headers=nil, redirect_limit=REDIRECT_LIMIT)
    raise OpenID::FetchingError, "Blank URL: #{url}" if url.blank?

    headers ||= {}
    headers['User-agent'] ||= USER_AGENT

    options = {
      :follow_redirects => false,
      :allow_truncated => false,
      :headers => headers,
      :follow_redirects => true,
      :allow_truncated => false,
    }

    response = nil

    if not body.nil?
      query = Rack::Utils.build_query(body)
      options[:method] = 'POST'
      options[:headers]["Content-type"] ||= "application/x-www-form-urlencoded"
      options[:payload] = query
    else
      options[:method] = 'GET'
    end

    begin
      response = AppEngine::URLFetch.fetch(url, options)
    rescue Exception => why
      raise OpenID::FetchingError, "Error fetching #{url}: #{why}"
    end

    return OpenID::HTTPResponse._from_net_response(response, url)
  end
end

OpenID.fetcher = MyFetcher.new