How to use the ejs.open function in ejs

* @license New BSD License (see LICENSE file for details).
 */

var express =   require('express'),
    DB      =   require('./db'),
    sconfig =   require("./config"),
    log     =   require('logule').init(module),
    path    =   require('path'),
    ejs     =   require('ejs'),
    ursa    =   require('ursa'),
    fs      =   require('fs'),
    util    =   require('./util'),
    //constants
    HTTP_SERVER_ERROR = 500;

ejs.open    =   '{{';
ejs.close   =   '}}';

/* Globals */
global.obj          =   require('./lib/obj');
global.arrays       =   require('./lib/arrays');
global.ClientError  =   require('./lib/clienterror');
global.ROOT         =   path.dirname(process.mainModule.filename);

/**
 * Mount a new Survana module
 * @param app
 * @param name
 * @param mconf
 * @return {Object}
 */
function addModule(app,name,mconf)

'For example: ');
      return;
    }
    // Extract the bindings
    conf.bindings = {};
    var queryScripts = document.querySelectorAll('script[type="text/prismic-query"]');
    for(var i=0; i

function renderTemplate(content, ctx) {
    // The vm context sandbox is kept separate from the template context to work around an issue
    // in earlier versions of node (pre v0.11.7) where escape() is added to the template context.
    if (!ctx._sandbox) {
      ctx._sandbox = vm.createContext(ctx);
    }
    ejs.open = '[%';
    ejs.close = '%]';
    ctx._sandbox.__render__ = function render() {
      delete ctx._sandbox.__render__;
      return ejs.render(content, ctx);
    };

    return vm.runInContext("__render__()", ctx._sandbox);
  }

var ejs = require('ejs')
ejs.open = '{{'
ejs.close = '}}'
var express = require('express')
var app = express()
var http = require('http')
var server = http.createServer(app)
var ws = new (require('websocket').server)({httpServer: server, port: 3030})

var allowCrossDomain = function(req, res, next) {
    res.header('Access-Control-Allow-Origin', '*');
    res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
    res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, Content-Length, X-Requested-With');

    // intercept OPTIONS method
    if ('OPTIONS' == req.method) {
      res.send(200);
    }

* Module dependencies.
 */

var fs = require('fs');
var path = require('path');
var http = require('http');
var ejs = require('ejs');
var filters = require('./filters');

var settings = {
  root: __dirname + '/views',
  cache: true,
  layout: 'layout.html',
  viewExt: '', // view default extname
  _filters: {},
  open: ejs.open || "<%",
  close: ejs.close || "%>"
};

for (var k in filters) {
  settings._filters[k] = filters[k];
}

var cache = {};

function _render_tpl(fn, options, callback) {
  var str;
  try {
    str = options.scope ? fn.call(options.scope, options) :  fn(options);
  } catch (err) {
    return callback(err);
  }

exports.generate = function(docfiles, options, callback) {
  if (typeof options === 'function') {
    callback = options;
    options = {};
  }

  callback =  callback || function() {};
  options = options || {};

  options = u.defaults(options, {
    template: exports.defaultTemplate
    , encoding: 'utf-8'
  });

  ejs.open = '';

  fs.readFile(options.template, options.encoding, function(err, data){
    if (err) {
      callback(err);
    }

    // Remove indentation
    data = data.replace(/\n */g, '\n');

    var output = ejs.render(data, {
      docfiles: docfiles,
      escape: function(html) {
        return String(html);
      }
    });

/**
 * 初始化页面
 *
 * Created by zhaoxiaoqiang on 15/10/19.
 */

var fs = require('fs');
var config = require('./config.js');
var ejs = require('ejs');
// 当和 init-site 集成使用时需要重置配置
ejs.open = '<%';
ejs.close = '%>';

function initPage(articleArr) {
    // 首页
    var indexPageTemplatePath = config.rootPath + config.indexPageTemplatePath;
    var indexTemplate = fs.readFileSync(indexPageTemplatePath, config.encoding);
    var indexHtml = ejs.render(
        indexTemplate,
        {
            articleArr: articleArr
        }
    );
    var indexPagePath = config.rootPath + config.indexPagePath;
    fs.writeFileSync(indexPagePath, indexHtml, config.encoding);
}

function ViewScaffolder(){
		ejs.open = '{{';
		ejs.close = '}}';
	};

this.render = function() {
        var ejs = require('ejs');
        ejs.open = '{{';
        ejs.close = '}}';
        var opts = utils.merge(self.locals, self.fn);
        self.output = ejs.render(self.output, opts);
        self.res.end(self.output, 'utf-8');
        self.output = '';
    }

Utils.prototype.writeTemplateFileSync = function(destinationFile, templatePath, model, ejsOpenTag, ejsCloseTag) {
		ejs.open = '{{';
		ejs.close = '}}';
		this.writeFileSync(destinationFile, templatePath, model);
	};