Invoke close on input stream when input is finished.

lib/protocol/http/body/stream.rb

@@ -295,7 +295,14 @@ def empty?
 
 				def read_next
 					if @input
-						return @input.read
+						# User's may forget to call #close...
+						if chunk = @input.read
+							return chunk
+						else
+							# So if we are at the end of the stream, we close it automatically:
+							@input.close
+							@input = nil
+						end
 					elsif @closed_read
 						raise IOError, "Stream is not readable, input has been closed!"
 					end

test/protocol/http/body/streamable.rb

@@ -175,9 +175,10 @@
 
 		with "#close" do
 			it "can close the body" do
-				expect(input).not.to receive(:close)
+				expect(input).to receive(:close)
 
 				expect(body.read).to be == "Hello"
+
 				body.close
 			end
 		end