index.js

'use strict'

var fs = require('fs');
var express = require('express');

var favIconHtml = '<link rel="icon" type="image/png" href="./favicon-32x32.png" sizes="32x32" />' +
                  '<link rel="icon" type="image/png" href="./favicon-16x16.png" sizes="16x16" />'


var setup = function (swaggerDoc, opts, options, customCss, customfavIcon, swaggerUrl, customeSiteTitle) {
  var isExplorer
  var customJs
  if (opts && typeof opts === 'object') {
    isExplorer = opts.explorer
    options = opts.swaggerOptions
    customCss = opts.customCss
    customJs = opts.customJs
    customfavIcon = opts.customfavIcon
    swaggerUrl = opts.swaggerUrl
    customeSiteTitle = opts.customSiteTitle
  } else {
    //support legacy params based function
    isExplorer = opts
  }
	options = options || {};
  var explorerString = isExplorer ? '' : '.swagger-ui .topbar .download-url-wrapper { display: none }';
    customCss = explorerString + ' ' + customCss || explorerString;
    customfavIcon = customfavIcon || false;
    customeSiteTitle = customeSiteTitle || 'Swagger UI';
	var html = fs.readFileSync(__dirname + '/indexTemplate.html');
    try {
    	fs.unlinkSync(__dirname + '/index.html');
    } catch (e) {

    }

    var favIconString = customfavIcon ? '<link rel="icon" href="' + customfavIcon + '" />' : favIconHtml;
    var htmlWithCustomCss = html.toString().replace('<% customCss %>', customCss);
    var htmlWithFavIcon = htmlWithCustomCss.replace('<% favIconString %>', favIconString);
    var htmlWithCustomJs = htmlWithFavIcon.replace('<% customJs %>', customJs ? `<script src="${customJs}"></script>` : '');

    var initOptions = {
      swaggerDoc: swaggerDoc || undefined,
      customOptions: options,
      swaggerUrl: swaggerUrl || undefined
    }
    var htmlWithOptions = htmlWithCustomJs.replace('<% swaggerOptions %>', JSON.stringify(initOptions)).replace('<% title %>', customeSiteTitle)

    return function (req, res) { res.send(htmlWithOptions) };
};

var serve = express.static(__dirname + '/static');

var stringify = function (obj, prop) {
  var placeholder = '____FUNCTIONPLACEHOLDER____';
  var fns = [];
  var json = JSON.stringify(obj, function (key, value) {
    if (typeof value === 'function') {
      fns.push(value);
      return placeholder;
    }
    return value;
  }, 2);
  json = json.replace(new RegExp('"' + placeholder + '"', 'g'), function (_) {
    return fns.shift();
  });
  return json + ';';
};

module.exports = {
	setup: setup,
	serve: serve
};