Copied auth token reauthentication from rackspace|compute

lib/fog/rackspace/storage.rb

@@ -83,16 +83,13 @@ module Fog
           @rackspace_username = options[:rackspace_username]
           @rackspace_cdn_ssl = options[:rackspace_cdn_ssl]
           @rackspace_auth_url = options[:rackspace_auth_url]
+          @rackspace_servicenet = options[:rackspace_servicenet]
+          @rackspace_auth_token = options[:rackspace_auth_token]
+          @rackspace_storage_url = options[:rackspace_storage_url]
+          @rackspace_must_reauthenticate = false
           @connection_options     = options[:connection_options] || {}
-          credentials = Fog::Rackspace.authenticate(options, @connection_options)
+          authenticate
-          @auth_token = credentials['X-Auth-Token']
-
-          uri = URI.parse(credentials['X-Storage-Url'])
-          @host       = options[:rackspace_servicenet] == true ? "snet-#{uri.host}" : uri.host
-          @path       = uri.path
           @persistent = options[:persistent] || false
-          @port       = uri.port
-          @scheme     = uri.scheme
           Excon.ssl_verify_peer = false if options[:rackspace_servicenet] == true
           @connection = Fog::Connection.new("#{@scheme}://#{@host}:#{@port}", @persistent, @connection_options)
         end
@@ -111,6 +108,14 @@ module Fog
               :host     => @host,
               :path     => "#{@path}/#{params[:path]}",
             }), &block)
+          rescue Excon::Errors::Unauthorized => error
+            if error.response.body != 'Bad username or password' # token expiration
+              @rackspace_must_reauthenticate = true
+              authenticate
+              retry
+            else # bad credentials
+              raise error
+            end
           rescue Excon::Errors::HTTPStatusError => error
             raise case error
             when Excon::Errors::NotFound
@@ -125,6 +130,28 @@ module Fog
           response
         end
 
+        private
+
+        def authenticate
+          if @rackspace_must_reauthenticate || @rackspace_auth_token.nil?
+            options = {
+              :rackspace_api_key  => @rackspace_api_key,
+              :rackspace_username => @rackspace_username,
+              :rackspace_auth_url => @rackspace_auth_url
+            }
+            credentials = Fog::Rackspace.authenticate(options, @connection_options)
+            @auth_token = credentials['X-Auth-Token']
+            uri = URI.parse(credentials['X-Storage-Url'])
+          else
+            @auth_token = @rackspace_auth_token
+            uri = URI.parse(@rackspace_storage_url)
+          end
+          @host   = @rackspace_servicenet == true ? "snet-#{uri.host}" : uri.host
+          @path   = uri.path
+          @port   = uri.port
+          @scheme = uri.scheme
+        end
+
       end
     end
   end