Add support for writing interim (informational) responses. (#25)

lib/protocol/http1/connection.rb

@@ -128,6 +128,15 @@ def write_response(version, status, headers, reason = Reason::DESCRIPTIONS[statu
 				write_headers(headers)
 			end
 
+			def write_interim_response(version, status, headers, reason = Reason::DESCRIPTIONS[status])
+				@stream.write("#{version} #{status} #{reason}\r\n")
+
+				write_headers(headers)
+
+				@stream.write("\r\n")
+				@stream.flush
+			end
+
 			def write_headers(headers)
 				headers.each do |name, value|
 					# Convert it to a string:

test/protocol/http1/connection.rb

@@ -127,6 +127,15 @@
 		end
 	end
 
+	with '#write_interim_response' do
+		it 'can write iterm response' do
+			server.write_interim_response("HTTP/1.1", 100, {})
+			server.close
+
+			expect(client.stream.read).to be == "HTTP/1.1 100 Continue\r\n\r\n"
+		end
+	end
+
 	with '#persistent?' do
 		describe "HTTP 1.0" do
 			it "should not be persistent by default" do