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+/*
+ * ZeroTier One - Global Peer to Peer Ethernet
+ * Copyright (C) 2012-2013  ZeroTier Networks LLC
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * --
+ *
+ * ZeroTier may be used and distributed under the terms of the GPLv3, which
+ * are available at: http://www.gnu.org/licenses/gpl-3.0.html
+ *
+ * If you would like to embed ZeroTier into a commercial application or
+ * redistribute it in a modified binary form, please contact ZeroTier Networks
+ * LLC. Start here: http://www.zerotier.com/
+ */
+
+#ifndef _ZT_HTTP_HPP
+#define _ZT_HTTP_HPP
+
+#include <map>
+#include <string>
+#include <stdexcept>
+#include "Thread.hpp"
+
+#include "../ext/http-parser/http_parser.h"
+
+namespace ZeroTier {
+
+class Http
+{
+public:
+	/**
+	 * HTTP request methods
+	 */
+	enum Method
+	{
+		HTTP_METHOD_GET,
+		HTTP_METHOD_HEAD
+	};
+
+	/**
+	 * An empty headers map for convenience
+	 */
+	static const std::map<std::string,std::string> EMPTY_HEADERS;
+
+	/**
+	 * HTTP request
+	 */
+	class Request : protected Thread
+	{
+	public:
+		/**
+		 * Create and issue an HTTP request
+		 *
+		 * The supplied handler is called when the request is
+		 * complete or if an error occurs. A code of zero indicates
+		 * that the server could not be reached, and a description
+		 * of the error will be in 'body'. If the handler returns
+		 * false the Request object deletes itself. Otherwise the
+		 * object must be deleted by other code.
+		 *
+		 * @param m Request method
+		 * @param url Destination URL
+		 * @param rh Request headers
+		 * @param rb Request body or empty string for none (currently unused)
+		 * @param handler Request handler function
+		 * @param arg First argument to request handler
+		 */
+		Request(
+			Http::Method m,
+			const std::string &url,
+			const std::map<std::string,std::string> &rh,
+			const std::string &rb,
+			bool (*handler)(Request *,void *,const std::string &,int,const std::map<std::string,std::string> &,const std::string &),
+			void *arg);
+
+		/**
+		 * Destruction cancels any in-progress request
+		 */
+		virtual ~Request();
+
+	protected:
+		virtual void main()
+			throw();
+
+	private:
+		// HTTP parser handlers
+		static int _http_on_message_begin(http_parser *parser);
+		static int _http_on_url(http_parser *parser,const char *data,size_t length);
+		static int _http_on_status_complete(http_parser *parser);
+		static int _http_on_header_field(http_parser *parser,const char *data,size_t length);
+		static int _http_on_header_value(http_parser *parser,const char *data,size_t length);
+		static int _http_on_headers_complete(http_parser *parser);
+		static int _http_on_body(http_parser *parser,const char *data,size_t length);
+		static int _http_on_message_complete(http_parser *parser);
+
+		http_parser _parser;
+		std::string _url;
+
+		std::map<std::string,std::string> _requestHeaders;
+		std::map<std::string,std::string> _responseHeaders;
+
+		std::string _currentHeaderField;
+		std::string _responseBody;
+
+		bool (*_handler)(Request *,void *,const std::string &,int,const std::map<std::string,std::string> &,const std::string &);
+		void *_arg;
+
+		Http::Method _method;
+		int _responseStatusCode;
+		bool _messageComplete;
+		volatile int _fd;
+	};
+};
+
+} // namespace ZeroTier
+
+#endif