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105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
/** LWS-releated functions.
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#pragma once
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#include <atomic>
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#include <thread>
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#include <jansson.h>
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#include <villas/log.hpp>
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#include <villas/common.hpp>
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#include <villas/queue.hpp>
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namespace villas {
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namespace node {
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/* Forward declarations */
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class Api;
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class Web {
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protected:
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enum State state;
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Logger logger;
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lws_context *context; /**< The libwebsockets server context. */
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lws_vhost *vhost; /**< The libwebsockets vhost. */
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Queue<lws *> writables; /**< Queue of WSIs for which we will call lws_callback_on_writable() */
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int port; /**< Port of the build in HTTP / WebSocket server. */
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std::string htdocs; /**< The root directory for files served via HTTP. */
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std::string ssl_cert; /**< Path to the SSL certitifcate for HTTPS / WSS. */
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std::string ssl_private_key; /**< Path to the SSL private key for HTTPS / WSS. */
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std::thread thread;
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std::atomic<bool> running; /**< Atomic flag for signalizing thread termination. */
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Api *api;
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void worker();
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static void lwsLogger(int level, const char *msg);
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public:
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/** Initialize the web interface.
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*
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* The web interface is based on the libwebsockets library.
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*/
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Web(Api *a = nullptr);
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void start();
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void stop();
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/** Parse HTTPd and WebSocket related options */
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int parse(json_t *cfg);
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Api * getApi()
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{
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return api;
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}
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/* for C-compatability */
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lws_context * getContext()
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{
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return context;
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}
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lws_vhost * getVHost()
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{
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return vhost;
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}
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enum State getState() const
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{
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return state;
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}
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void callbackOnWritable(struct lws *wsi);
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};
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} /* namespace node */
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} /* namespace villas */
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