text: #!/usr/bin/env node
  /**
   * Copyright 2013, 2016 IBM Corp.
   *
   * 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.
   **/
  var http = require('http');
  var https = require('https');
  var util = require("util");
  var express = require("express");
  var crypto = require("crypto");
  try { bcrypt = require('bcrypt'); }
  catch(e) { bcrypt = require('bcryptjs'); }
  var nopt = require("nopt");
  var path = require("path");
  var fs = require("fs-extra");
  var RED = require("./red/red.js");
  
  var server;
  var app = express();
  
  var settingsFile;
  var flowFile;
  
  var knownOpts = {
      "help": Boolean,
      "port": Number,
      "settings": [path],
      "title": String,
      "userDir": [path],
      "verbose": Boolean
  };
  var shortHands = {
      "?":["--help"],
      "p":["--port"],
      "s":["--settings"],
      "t":["--help"],
      "u":["--userDir"],
      "v":["--verbose"]
  };
  nopt.invalidHandler = function(k,v,t) {
      // TODO: console.log(k,v,t);
  }
  
  var parsedArgs = nopt(knownOpts,shortHands,process.argv,2)
  
  if (parsedArgs.help) {
      console.log("Node-RED v"+RED.version());
      console.log("Usage: node-red [-v] [-?] [--settings settings.js] [--userDir DIR]");
      console.log("                [--port PORT] [--title TITLE] [flows.json]");
      console.log("");
      console.log("Options:");
      console.log("  -p, --port     PORT  port to listen on");
      console.log("  -s, --settings FILE  use specified settings file");
      console.log("      --title    TITLE process window title");
      console.log("  -u, --userDir  DIR   use specified user directory");
      console.log("  -v, --verbose        enable verbose output");
      console.log("  -?, --help           show this help");
      console.log("");
      console.log("Documentation can be found at http://nodered.org");
      process.exit();
  }
  if (parsedArgs.argv.remain.length > 0) {
      flowFile = parsedArgs.argv.remain[0];
  }
  
  if (parsedArgs.settings) {
      // User-specified settings file
      settingsFile = parsedArgs.settings;
  } else if (parsedArgs.userDir && fs.existsSync(path.join(parsedArgs.userDir,"settings.js"))) {
      // User-specified userDir that contains a settings.js
      settingsFile = path.join(parsedArgs.userDir,"settings.js");
  } else {
      if (fs.existsSync(path.join(process.env.NODE_RED_HOME,".config.json"))) {
          // NODE_RED_HOME contains user data - use its settings.js
          settingsFile = path.join(process.env.NODE_RED_HOME,"settings.js");
      } else {
          var userDir = parsedArgs.userDir || path.join(process.env.HOME || process.env.HOMEPATH || process.env.USERPROFILE,".node-red");
          var userSettingsFile = path.join(userDir,"settings.js");
          if (fs.existsSync(userSettingsFile)) {
              // $HOME/.node-red/settings.js exists
              settingsFile = userSettingsFile;
          } else {
              var defaultSettings = path.join(__dirname,"settings.js");
              var settingsStat = fs.statSync(defaultSettings);
              if (settingsStat.mtime.getTime() < settingsStat.ctime.getTime()) {
                  // Default settings file has not been modified - safe to copy
                  fs.copySync(defaultSettings,userSettingsFile);
                  settingsFile = userSettingsFile;
              } else {
                  // Use default settings.js as it has been modified
                  settingsFile = defaultSettings;
              }
          }
      }
  }
  
  try {
      var settings = require(settingsFile);
      settings.settingsFile = settingsFile;
  } catch(err) {
      console.log("Error loading settings file: "+settingsFile)
      if (err.code == 'MODULE_NOT_FOUND') {
          if (err.toString().indexOf(settingsFile) === -1) {
              console.log(err.toString());
          }
      } else {
          console.log(err);
      }
      process.exit();
  }
  
  if (parsedArgs.v) {
      settings.verbose = true;
  }
  
  if (settings.https) {
      server = https.createServer(settings.https,function(req,res) {app(req,res);});
  } else {
      server = http.createServer(function(req,res) {app(req,res);});
  }
  server.setMaxListeners(0);
  
  function formatRoot(root) {
      if (root[0] != "/") {
          root = "/" + root;
      }
      if (root.slice(-1) != "/") {
          root = root + "/";
      }
      return root;
  }
  
  if (settings.httpRoot === false) {
      settings.httpAdminRoot = false;
      settings.httpNodeRoot = false;
  } else {
      settings.httpRoot = settings.httpRoot||"/";
      settings.disableEditor = settings.disableEditor||false;
  }
  
  if (settings.httpAdminRoot !== false) {
      settings.httpAdminRoot = formatRoot(settings.httpAdminRoot || settings.httpRoot || "/");
      settings.httpAdminAuth = settings.httpAdminAuth || settings.httpAuth;
  } else {
      settings.disableEditor = true;
  }
  
  if (settings.httpNodeRoot !== false) {
      settings.httpNodeRoot = formatRoot(settings.httpNodeRoot || settings.httpRoot || "/");
      settings.httpNodeAuth = settings.httpNodeAuth || settings.httpAuth;
  }
  
  settings.uiPort = parsedArgs.port||settings.uiPort||1880;
  settings.uiHost = settings.uiHost||"0.0.0.0";
  
  if (flowFile) {
      settings.flowFile = flowFile;
  }
  if (parsedArgs.userDir) {
      settings.userDir = parsedArgs.userDir;
  }
  
  try {
      RED.init(server,settings);
  } catch(err) {
      if (err.code == "not_built") {
          console.log("Node-RED has not been built. See README.md for details");
      } else {
          console.log("Failed to start server:");
          if (err.stack) {
              console.log(err.stack);
          } else {
              console.log(err);
          }
      }
      process.exit(1);
  }
  
  function basicAuthMiddleware(user,pass) {
      var basicAuth = require('basic-auth');
      var checkPassword;
      if (pass.length == "32") {
          // Assume its a legacy md5 password
          checkPassword = function(p) {
              return crypto.createHash('md5').update(p,'utf8').digest('hex') === pass;
          }
      } else {
          checkPassword = function(p) {
              return bcrypt.compareSync(p,pass);
          }
      }
  
      return function(req,res,next) {
          if (req.method === 'OPTIONS') {
              return next();
          }
          var requestUser = basicAuth(req);
          if (!requestUser || requestUser.name !== user || !checkPassword(requestUser.pass)) {
              res.set('WWW-Authenticate', 'Basic realm=Authorization Required');
              return res.sendStatus(401);
          }
          next();
      }
  }
  
  if (settings.httpAdminRoot !== false && settings.httpAdminAuth) {
      RED.log.warn(RED.log._("server.httpadminauth-deprecated"));
      app.use(settings.httpAdminRoot, basicAuthMiddleware(settings.httpAdminAuth.user,settings.httpAdminAuth.pass));
  }
  
  if (settings.httpAdminRoot !== false) {
      app.use(settings.httpAdminRoot,RED.httpAdmin);
  }
  if (settings.httpNodeRoot !== false && settings.httpNodeAuth) {
      app.use(settings.httpNodeRoot,basicAuthMiddleware(settings.httpNodeAuth.user,settings.httpNodeAuth.pass));
  }
  if (settings.httpNodeRoot !== false) {
      app.use(settings.httpNodeRoot,RED.httpNode);
  }
  if (settings.httpStatic) {
      settings.httpStaticAuth = settings.httpStaticAuth || settings.httpAuth;
      if (settings.httpStaticAuth) {
          app.use("/",basicAuthMiddleware(settings.httpStaticAuth.user,settings.httpStaticAuth.pass));
      }
      app.use("/",express.static(settings.httpStatic));
  }
  
  function getListenPath() {
      var listenPath = 'http'+(settings.https?'s':'')+'://'+
                      (settings.uiHost == '0.0.0.0'?'127.0.0.1':settings.uiHost)+
                      ':'+settings.uiPort;
      if (settings.httpAdminRoot !== false) {
          listenPath += settings.httpAdminRoot;
      } else if (settings.httpStatic) {
          listenPath += "/";
      }
      return listenPath;
  }
  
  RED.start().then(function() {
      if (settings.httpAdminRoot !== false || settings.httpNodeRoot !== false || settings.httpStatic) {
          server.on('error', function(err) {
              if (err.errno === "EADDRINUSE") {
                  RED.log.error(RED.log._("server.unable-to-listen", {listenpath:getListenPath()}));
                  RED.log.error(RED.log._("server.port-in-use"));
              } else {
                  RED.log.error(RED.log._("server.uncaught-exception"));
                  if (err.stack) {
                      RED.log.error(err.stack);
                  } else {
                      RED.log.error(err);
                  }
              }
              process.exit(1);
          });
          server.listen(settings.uiPort,settings.uiHost,function() {
              if (settings.httpAdminRoot === false) {
                  RED.log.info(RED.log._("server.admin-ui-disabled"));
              }
              process.title = parsedArgs.title || 'node-red';
              RED.log.info(RED.log._("server.now-running", {listenpath:getListenPath()}));
          });
      } else {
          RED.log.info(RED.log._("server.headless-mode"));
      }
  }).otherwise(function(err) {
      RED.log.error(RED.log._("server.failed-to-start"));
      if (err.stack) {
          RED.log.error(err.stack);
      } else {
          RED.log.error(err);
      }
  });
  
  process.on('uncaughtException',function(err) {
      util.log('[red] Uncaught Exception:');
      if (err.stack) {
          util.log(err.stack);
      } else {
          util.log(err);
      }
      process.exit(1);
  });
  
  process.on('SIGINT', function () {
      RED.stop();
      // TODO: need to allow nodes to close asynchronously before terminating the
      // process - ie, promises
      process.exit();
  });
  