Avoid writing to the body after full hijack

async-http.gemspec

@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
 	spec.add_dependency "async-io", ">= 1.28"
 	spec.add_dependency "async-pool", ">= 0.2"
 	spec.add_dependency "protocol-http", "~> 0.26.0"
-	spec.add_dependency "protocol-http1", "~> 0.18.0"
+	spec.add_dependency "protocol-http1", "~> 0.19.0"
 	spec.add_dependency "protocol-http2", "~> 0.16.0"
 	spec.add_dependency "traces", ">= 0.10.0"
 end

lib/async/http/protocol/http1/server.rb

@@ -50,8 +50,8 @@ def each(task: Task.current)
 							response = yield(request, self)
 							body = response&.body
 
-							if @stream.nil? and body.nil?
-								# Full hijack.
+							if hijacked?
+								body&.close
 								return
 							end
 

test/async/http/protocol/http11.rb

@@ -65,7 +65,7 @@ def around
 						"Hello World!"
 					)
 					peer.close
-					
+
 					nil
 				end
 			end
@@ -82,5 +82,33 @@ def around
 				expect(response.reason).to be == "It worked!"
 			end
 		end
+
+		with 'full hijack with empty response' do
+			let(:body) {Async::HTTP::Body::Buffered.new([], 0)}
+
+			let(:app) do
+				::Protocol::HTTP::Middleware.for do |request|
+					peer = request.hijack!
+
+          peer.write(
+            "#{request.version} 200 It worked!\r\n" +
+            "connection: close\r\n" +
+            "\r\n" +
+            "Hello World!"
+          )
+          peer.close
+
+					::Protocol::HTTP::Response[-1, {}, body]
+				end
+			end
+
+			it "works properly" do
+				expect(body).to receive(:close)
+
+				response = client.get("/")
+
+				expect(response.read).to be == "Hello World!"
+			end
+		end
 	end
 end