Takumon/mean-blog

import * as http from 'http';
import * as ENV from '../environment-config';
import app from '../app';
import { systemLogger, accessLogger, errorLogger } from '../logger';



/**
 * ポートの設定.
 */
const port = normalizePort(ENV.SERVER_PORT);
app.set('port', port);

/**
 * HTTPサーバ生成.
 */
const server = http.createServer(app);
server.listen(port, () => systemLogger.info(`API running on :${port}`));
server.on('error', onError);
server.on('listening', onListening);

/**
 * ポートを正規化.
 */
function normalizePort(val): number|string|boolean  {


  const normalizedPort: number = (typeof val === 'string')
    ? parseInt(val, 10)
    : val;

  if (isNaN(normalizedPort)) {
    return val;
  }

  if (normalizedPort >= 0) {
    return normalizedPort;
  }

  return false;
}

/**
 * エラーハンドラー.
 */
function onError(error): void {
  if (error.syscall !== 'listen') {
    throw error;
  }

  const bind = typeof port === 'string'
    ? 'Pipe ' + port
    : 'Port ' + port;

  // handle specific listen errors with friendly messages
  switch (error.code) {
    case 'EACCES':
      errorLogger.error(bind + ' requires elevated privileges');
      process.exit(1);
      break;
    case 'EADDRINUSE':
      errorLogger.error(bind + ' is already in use');
      process.exit(1);
      break;
    default:
    　errorLogger.error('error:' + error);
　　  throw error;
  }
}

/**
 * サーバ起動時のリスナー.
 */
function onListening(): void {
  const addr = server.address();
  const bind = (typeof addr === 'string')
    ? `pipe ${addr}`
    : `port ${addr.port}`;
  systemLogger.info('bind = ' + bind);
}