Make on_process() return an HttpHeader.

Response type is now decided by on_process' return value.

src/tawashi_implem/http_header.hpp

@@ -0,0 +1,72 @@
+/* Copyright 2017, Michele Santullo
+ * This file is part of "tawashi".
+ *
+ * "tawashi" is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * "tawashi" is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with "tawashi".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "enum.h"
+#include <cstdint>
+#include <string>
+#include <ostream>
+
+namespace tawashi {
+	SLOW_ENUM(HttpStatusCodes, uint16_t,
+		Code301_MovedPermanently,
+		Code302_Found,
+		Code303_SeeOther,
+		Code400_BadRequest,
+		Code403_Forbidden,
+		Code404_NotFound,
+		Code413_PayloadTooLarge,
+		Code429_TooManyRequests,
+		Code431_RequestHeaderFieldsTooLarge,
+		Code500_InternalServerError,
+		Code501_NotImplemented,
+		Code503_ServiceUnavailable,
+		CodeNone
+	)
+	class HttpHeader {
+	public:
+		enum Types : uint8_t {
+			ContentType,
+			Location,
+			Status
+		};
+
+		HttpHeader();
+		HttpHeader (Types parType, HttpStatusCodes parCode, std::string&& parParam);
+		~HttpHeader() noexcept = default;
+
+		Types type() const { return m_header_type; }
+		HttpStatusCodes status_code() const { return m_status_code; }
+		const std::string& parameter() const { return m_param; }
+		bool body_required() const;
+
+		void set_status (HttpStatusCodes parCode);
+		void unset_status();
+		void set_type (Types parType, std::string&& parParameter);
+
+	private:
+		std::string m_param;
+		HttpStatusCodes m_status_code;
+		Types m_header_type;
+	};
+
+	std::ostream& operator<< (std::ostream& parStream, const HttpHeader& parHeader);
+	HttpHeader make_header_type_html();
+	HttpHeader make_header_type_text_utf8();
+	HttpStatusCodes int_to_status_code (uint16_t parCode);
+} //namespace tawashi