Add "rewindable?" predicate to body.

Author: ioquatix

lib/protocol/http/body/buffered.rb

@@ -77,8 +77,14 @@ def write(chunk)
 					@chunks << chunk
 				end
 
+				def rewindable?
+					true
+				end
+				
 				def rewind
 					@index = 0
+					
+					return true
 				end
 
 				def inspect

lib/protocol/http/body/completable.rb

@@ -24,6 +24,14 @@ def initialize(body, callback)
 					@callback = callback
 				end
 
+				def rewindable?
+					false
+				end
+				
+				def rewind
+					false
+				end
+				
 				def finish
 					super.tap do
 						if @callback

lib/protocol/http/body/readable.rb

@@ -29,6 +29,14 @@ def ready?
 					false
 				end
 
+				def rewindable?
+					false
+				end
+				
+				def rewind
+					false
+				end
+				
 				def length
 					nil
 				end

lib/protocol/http/body/rewindable.rb

@@ -54,6 +54,10 @@ def rewind
 					@index = 0
 				end
 
+				def rewindable?
+					true
+				end
+				
 				def inspect
 					"\#<#{self.class} #{@index}/#{@chunks.size} chunks read>"
 				end

lib/protocol/http/body/wrapper.rb

@@ -42,6 +42,14 @@ def ready?
 					@body.ready?
 				end
 
+				def rewind
+					@body.rewind
+				end
+				
+				def rewindable?
+					@body.rewind?
+				end
+				
 				def length
 					@body.length
 				end