server.js
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/*
* Copyright © 2016-2020 The Thingsboard Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
const config = require('config'),
logger = require('./config/logger')('main'),
express = require('express'),
compression = require('compression'),
http = require('http'),
httpProxy = require('http-proxy'),
path = require('path'),
historyApiFallback = require("connect-history-api-fallback");
var server;
(async() => {
try {
logger.info('Starting ThingsBoard Web UI Microservice...');
const bindAddress = config.get('server.address');
const bindPort = config.get('server.port');
const thingsboardEnableProxy = config.get('thingsboard.enableProxy');
const thingsboardHost = config.get('thingsboard.host');
const thingsboardPort = config.get('thingsboard.port');
logger.info('Bind address: %s', bindAddress);
logger.info('Bind port: %s', bindPort);
logger.info('ThingsBoard Enable Proxy: %s', thingsboardEnableProxy);
logger.info('ThingsBoard host: %s', thingsboardHost);
logger.info('ThingsBoard port: %s', thingsboardPort);
const useApiProxy = thingsboardEnableProxy === "true";
var webDir = path.join(__dirname, 'web');
if (typeof process.env.WEB_FOLDER === 'string') {
webDir = path.resolve(process.env.WEB_FOLDER);
}
logger.info('Web folder: %s', webDir);
const app = express();
server = http.createServer(app);
var apiProxy;
if (useApiProxy) {
apiProxy = httpProxy.createProxyServer({
target: {
host: thingsboardHost,
port: thingsboardPort
}
});
apiProxy.on('error', function (err, req, res) {
logger.warn('API proxy error: %s', err.message);
if (res.writeHead) {
res.writeHead(500);
if (err.code && err.code === 'ECONNREFUSED') {
res.end('Unable to connect to ThingsBoard server.');
} else {
res.end('Thingsboard server connection error: ' + err.code ? err.code : '');
}
}
});
app.all('/api/*', (req, res) => {
logger.debug(req.method + ' ' + req.originalUrl);
apiProxy.web(req, res);
});
app.all('/static/rulenode/*', (req, res) => {
apiProxy.web(req, res);
});
server.on('upgrade', (req, socket, head) => {
apiProxy.ws(req, socket, head);
});
}
app.use(historyApiFallback());
app.use(compression());
const root = path.join(webDir, 'public');
app.use(express.static(root));
server.listen(bindPort, bindAddress, (error) => {
if (error) {
logger.error('Failed to start ThingsBoard Web UI Microservice: %s', e.message);
logger.error(error.stack);
exit(-1);
} else {
logger.info('==> 🌎 Listening on port %s.', bindPort);
logger.info('Started ThingsBoard Web UI Microservice.');
}
});
} catch (e) {
logger.error('Failed to start ThingsBoard Web UI Microservice: %s', e.message);
logger.error(e.stack);
exit(-1);
}
})();
process.on('exit', function () {
exit(0);
});
function exit(status) {
logger.info('Exiting with status: %d ...', status);
if (server) {
logger.info('Stopping HTTP Server...');
var _server = server;
server = null;
_server.close(() => {
logger.info('HTTP Server stopped.');
process.exit(status);
});
} else {
process.exit(status);
}
}