bundle.js

/******/ (function(modules) { // webpackBootstrap
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/* 0 */
/***/ (function(module, exports, __webpack_require__) {

document.write('welcome to my app');
console.log('app loaded');

var cors = __webpack_require__(1);


var app = express();

app.use(cors());

app.use(function(req, res, next) {
   res.header("Access-Control-Allow-Origin", "*");
   res.header('Access-Control-Allow-Methods', 'DELETE, PUT, GET, POST');
   res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
   next();
});


/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {

(function () {

  'use strict';

  var assign = __webpack_require__(2);
  var vary = __webpack_require__(3);

  var defaults = {
      origin: '*',
      methods: 'GET,HEAD,PUT,PATCH,POST,DELETE',
      preflightContinue: false,
      optionsSuccessStatus: 204
    };

  function isString(s) {
    return typeof s === 'string' || s instanceof String;
  }

  function isOriginAllowed(origin, allowedOrigin) {
    if (Array.isArray(allowedOrigin)) {
      for (var i = 0; i < allowedOrigin.length; ++i) {
        if (isOriginAllowed(origin, allowedOrigin[i])) {
          return true;
        }
      }
      return false;
    } else if (isString(allowedOrigin)) {
      return origin === allowedOrigin;
    } else if (allowedOrigin instanceof RegExp) {
      return allowedOrigin.test(origin);
    } else {
      return !!allowedOrigin;
    }
  }

  function configureOrigin(options, req) {
    var requestOrigin = req.headers.origin,
      headers = [],
      isAllowed;

    if (!options.origin || options.origin === '*') {
      // allow any origin
      headers.push([{
        key: 'Access-Control-Allow-Origin',
        value: '*'
      }]);
    } else if (isString(options.origin)) {
      // fixed origin
      headers.push([{
        key: 'Access-Control-Allow-Origin',
        value: options.origin
      }]);
      headers.push([{
        key: 'Vary',
        value: 'Origin'
      }]);
    } else {
      isAllowed = isOriginAllowed(requestOrigin, options.origin);
      // reflect origin
      headers.push([{
        key: 'Access-Control-Allow-Origin',
        value: isAllowed ? requestOrigin : false
      }]);
      headers.push([{
        key: 'Vary',
        value: 'Origin'
      }]);
    }

    return headers;
  }

  function configureMethods(options) {
    var methods = options.methods;
    if (methods.join) {
      methods = options.methods.join(','); // .methods is an array, so turn it into a string
    }
    return {
      key: 'Access-Control-Allow-Methods',
      value: methods
    };
  }

  function configureCredentials(options) {
    if (options.credentials === true) {
      return {
        key: 'Access-Control-Allow-Credentials',
        value: 'true'
      };
    }
    return null;
  }

  function configureAllowedHeaders(options, req) {
    var allowedHeaders = options.allowedHeaders || options.headers;
    var headers = [];

    if (!allowedHeaders) {
      allowedHeaders = req.headers['access-control-request-headers']; // .headers wasn't specified, so reflect the request headers
      headers.push([{
        key: 'Vary',
        value: 'Access-Control-Request-Headers'
      }]);
    } else if (allowedHeaders.join) {
      allowedHeaders = allowedHeaders.join(','); // .headers is an array, so turn it into a string
    }
    if (allowedHeaders && allowedHeaders.length) {
      headers.push([{
        key: 'Access-Control-Allow-Headers',
        value: allowedHeaders
      }]);
    }

    return headers;
  }

  function configureExposedHeaders(options) {
    var headers = options.exposedHeaders;
    if (!headers) {
      return null;
    } else if (headers.join) {
      headers = headers.join(','); // .headers is an array, so turn it into a string
    }
    if (headers && headers.length) {
      return {
        key: 'Access-Control-Expose-Headers',
        value: headers
      };
    }
    return null;
  }

  function configureMaxAge(options) {
    var maxAge = options.maxAge && options.maxAge.toString();
    if (maxAge && maxAge.length) {
      return {
        key: 'Access-Control-Max-Age',
        value: maxAge
      };
    }
    return null;
  }

  function applyHeaders(headers, res) {
    for (var i = 0, n = headers.length; i < n; i++) {
      var header = headers[i];
      if (header) {
        if (Array.isArray(header)) {
          applyHeaders(header, res);
        } else if (header.key === 'Vary' && header.value) {
          vary(res, header.value);
        } else if (header.value) {
          res.setHeader(header.key, header.value);
        }
      }
    }
  }

  function cors(options, req, res, next) {
    var headers = [],
      method = req.method && req.method.toUpperCase && req.method.toUpperCase();

    if (method === 'OPTIONS') {
      // preflight
      headers.push(configureOrigin(options, req));
      headers.push(configureCredentials(options, req));
      headers.push(configureMethods(options, req));
      headers.push(configureAllowedHeaders(options, req));
      headers.push(configureMaxAge(options, req));
      headers.push(configureExposedHeaders(options, req));
      applyHeaders(headers, res);

      if (options.preflightContinue ) {
        next();
      } else {
        // Safari (and potentially other browsers) need content-length 0,
        //   for 204 or they just hang waiting for a body
        res.statusCode = options.optionsSuccessStatus || defaults.optionsSuccessStatus;
        res.setHeader('Content-Length', '0');
        res.end();
      }
    } else {
      // actual response
      headers.push(configureOrigin(options, req));
      headers.push(configureCredentials(options, req));
      headers.push(configureExposedHeaders(options, req));
      applyHeaders(headers, res);
      next();
    }
  }

  function middlewareWrapper(o) {
    // if options are static (either via defaults or custom options passed in), wrap in a function
    var optionsCallback = null;
    if (typeof o === 'function') {
      optionsCallback = o;
    } else {
      optionsCallback = function (req, cb) {
        cb(null, o);
      };
    }

    return function corsMiddleware(req, res, next) {
      optionsCallback(req, function (err, options) {
        if (err) {
          next(err);
        } else {
          var corsOptions = assign({}, defaults, options);
          var originCallback = null;
          if (corsOptions.origin && typeof corsOptions.origin === 'function') {
            originCallback = corsOptions.origin;
          } else if (corsOptions.origin) {
            originCallback = function (origin, cb) {
              cb(null, corsOptions.origin);
            };
          }

          if (originCallback) {
            originCallback(req.headers.origin, function (err2, origin) {
              if (err2 || !origin) {
                next(err2);
              } else {
                corsOptions.origin = origin;
                cors(corsOptions, req, res, next);
              }
            });
          } else {
            next();
          }
        }
      });
    };
  }

  // can pass either an options hash, an options delegate, or nothing
  module.exports = middlewareWrapper;

}());


/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";
/*
object-assign
(c) Sindre Sorhus
@license MIT
*/


/* eslint-disable no-unused-vars */
var getOwnPropertySymbols = Object.getOwnPropertySymbols;
var hasOwnProperty = Object.prototype.hasOwnProperty;
var propIsEnumerable = Object.prototype.propertyIsEnumerable;

function toObject(val) {
	if (val === null || val === undefined) {
		throw new TypeError('Object.assign cannot be called with null or undefined');
	}

	return Object(val);
}

function shouldUseNative() {
	try {
		if (!Object.assign) {
			return false;
		}

		// Detect buggy property enumeration order in older V8 versions.

		// https://bugs.chromium.org/p/v8/issues/detail?id=4118
		var test1 = new String('abc');  // eslint-disable-line no-new-wrappers
		test1[5] = 'de';
		if (Object.getOwnPropertyNames(test1)[0] === '5') {
			return false;
		}

		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
		var test2 = {};
		for (var i = 0; i < 10; i++) {
			test2['_' + String.fromCharCode(i)] = i;
		}
		var order2 = Object.getOwnPropertyNames(test2).map(function (n) {
			return test2[n];
		});
		if (order2.join('') !== '0123456789') {
			return false;
		}

		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
		var test3 = {};
		'abcdefghijklmnopqrst'.split('').forEach(function (letter) {
			test3[letter] = letter;
		});
		if (Object.keys(Object.assign({}, test3)).join('') !==
				'abcdefghijklmnopqrst') {
			return false;
		}

		return true;
	} catch (err) {
		// We don't expect any of the above to throw, but better to be safe.
		return false;
	}
}

module.exports = shouldUseNative() ? Object.assign : function (target, source) {
	var from;
	var to = toObject(target);
	var symbols;

	for (var s = 1; s < arguments.length; s++) {
		from = Object(arguments[s]);

		for (var key in from) {
			if (hasOwnProperty.call(from, key)) {
				to[key] = from[key];
			}
		}

		if (getOwnPropertySymbols) {
			symbols = getOwnPropertySymbols(from);
			for (var i = 0; i < symbols.length; i++) {
				if (propIsEnumerable.call(from, symbols[i])) {
					to[symbols[i]] = from[symbols[i]];
				}
			}
		}
	}

	return to;
};


/***/ }),
/* 3 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";
/*!
 * vary
 * Copyright(c) 2014-2017 Douglas Christopher Wilson
 * MIT Licensed
 */



/**
 * Module exports.
 */

module.exports = vary
module.exports.append = append

/**
 * RegExp to match field-name in RFC 7230 sec 3.2
 *
 * field-name    = token
 * token         = 1*tchar
 * tchar         = "!" / "#" / "$" / "%" / "&" / "'" / "*"
 *               / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
 *               / DIGIT / ALPHA
 *               ; any VCHAR, except delimiters
 */

var FIELD_NAME_REGEXP = /^[!#$%&'*+\-.^_`|~0-9A-Za-z]+$/

/**
 * Append a field to a vary header.
 *
 * @param {String} header
 * @param {String|Array} field
 * @return {String}
 * @public
 */

function append (header, field) {
  if (typeof header !== 'string') {
    throw new TypeError('header argument is required')
  }

  if (!field) {
    throw new TypeError('field argument is required')
  }

  // get fields array
  var fields = !Array.isArray(field)
    ? parse(String(field))
    : field

  // assert on invalid field names
  for (var j = 0; j < fields.length; j++) {
    if (!FIELD_NAME_REGEXP.test(fields[j])) {
      throw new TypeError('field argument contains an invalid header name')
    }
  }

  // existing, unspecified vary
  if (header === '*') {
    return header
  }

  // enumerate current values
  var val = header
  var vals = parse(header.toLowerCase())

  // unspecified vary
  if (fields.indexOf('*') !== -1 || vals.indexOf('*') !== -1) {
    return '*'
  }

  for (var i = 0; i < fields.length; i++) {
    var fld = fields[i].toLowerCase()

    // append value (case-preserving)
    if (vals.indexOf(fld) === -1) {
      vals.push(fld)
      val = val
        ? val + ', ' + fields[i]
        : fields[i]
    }
  }

  return val
}

/**
 * Parse a vary header into an array.
 *
 * @param {String} header
 * @return {Array}
 * @private
 */

function parse (header) {
  var end = 0
  var list = []
  var start = 0

  // gather tokens
  for (var i = 0, len = header.length; i < len; i++) {
    switch (header.charCodeAt(i)) {
      case 0x20: /*   */
        if (start === end) {
          start = end = i + 1
        }
        break
      case 0x2c: /* , */
        list.push(header.substring(start, end))
        start = end = i + 1
        break
      default:
        end = i + 1
        break
    }
  }

  // final token
  list.push(header.substring(start, end))

  return list
}

/**
 * Mark that a request is varied on a header field.
 *
 * @param {Object} res
 * @param {String|Array} field
 * @public
 */

function vary (res, field) {
  if (!res || !res.getHeader || !res.setHeader) {
    // quack quack
    throw new TypeError('res argument is required')
  }

  // get existing header
  var val = res.getHeader('Vary') || ''
  var header = Array.isArray(val)
    ? val.join(', ')
    : String(val)

  // set new header
  if ((val = append(header, field))) {
    res.setHeader('Vary', val)
  }
}


/***/ })
/******/ ]);