vue-image-crop-uploader/docs/vendor.b4f117a6809971e75d3f.js

vue image uploader

webpackJsonp([0],{

/***/ "+66z":
/***/ (function(module, exports) {

/** Used for built-in method references. */
var objectProto = Object.prototype;

/**
 * Used to resolve the
 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 * of values.
 */
var nativeObjectToString = objectProto.toString;

/**
 * Converts `value` to a string using `Object.prototype.toString`.
 *
 * @private
 * @param {*} value The value to convert.
 * @returns {string} Returns the converted string.
 */
function objectToString(value) {
  return nativeObjectToString.call(value);
}

module.exports = objectToString;


/***/ }),

/***/ "+9Es":
/***/ (function(module, exports, __webpack_require__) {

var AWS = __webpack_require__("lYdN");
var v4Credentials = __webpack_require__("8m6Q");
var inherit = AWS.util.inherit;

/**
 * @api private
 */
var expiresHeader = 'presigned-expires';

/**
 * @api private
 */
AWS.Signers.V4 = inherit(AWS.Signers.RequestSigner, {
  constructor: function V4(request, serviceName, options) {
    AWS.Signers.RequestSigner.call(this, request);
    this.serviceName = serviceName;
    options = options || {};
    this.signatureCache = typeof options.signatureCache === 'boolean' ? options.signatureCache : true;
    this.operation = options.operation;
  },

  algorithm: 'AWS4-HMAC-SHA256',

  addAuthorization: function addAuthorization(credentials, date) {
    var datetime = AWS.util.date.iso8601(date).replace(/[:\-]|\.\d{3}/g, '');

    if (this.isPresigned()) {
      this.updateForPresigned(credentials, datetime);
    } else {
      this.addHeaders(credentials, datetime);
    }

    this.request.headers['Authorization'] =
      this.authorization(credentials, datetime);
  },

  addHeaders: function addHeaders(credentials, datetime) {
    this.request.headers['X-Amz-Date'] = datetime;
    if (credentials.sessionToken) {
      this.request.headers['x-amz-security-token'] = credentials.sessionToken;
    }
  },

  updateForPresigned: function updateForPresigned(credentials, datetime) {
    var credString = this.credentialString(datetime);
    var qs = {
      'X-Amz-Date': datetime,
      'X-Amz-Algorithm': this.algorithm,
      'X-Amz-Credential': credentials.accessKeyId + '/' + credString,
      'X-Amz-Expires': this.request.headers[expiresHeader],
      'X-Amz-SignedHeaders': this.signedHeaders()
    };

    if (credentials.sessionToken) {
      qs['X-Amz-Security-Token'] = credentials.sessionToken;
    }

    if (this.request.headers['Content-Type']) {
      qs['Content-Type'] = this.request.headers['Content-Type'];
    }
    if (this.request.headers['Content-MD5']) {
      qs['Content-MD5'] = this.request.headers['Content-MD5'];
    }
    if (this.request.headers['Cache-Control']) {
      qs['Cache-Control'] = this.request.headers['Cache-Control'];
    }

    // need to pull in any other X-Amz-* headers
    AWS.util.each.call(this, this.request.headers, function(key, value) {
      if (key === expiresHeader) return;
      if (this.isSignableHeader(key)) {
        var lowerKey = key.toLowerCase();
        // Metadata should be normalized
        if (lowerKey.indexOf('x-amz-meta-') === 0) {
          qs[lowerKey] = value;
        } else if (lowerKey.indexOf('x-amz-') === 0) {
          qs[key] = value;
        }
      }
    });

    var sep = this.request.path.indexOf('?') >= 0 ? '&' : '?';
    this.request.path += sep + AWS.util.queryParamsToString(qs);
  },

  authorization: function authorization(credentials, datetime) {
    var parts = [];
    var credString = this.credentialString(datetime);
    parts.push(this.algorithm + ' Credential=' +
      credentials.accessKeyId + '/' + credString);
    parts.push('SignedHeaders=' + this.signedHeaders());
    parts.push('Signature=' + this.signature(credentials, datetime));
    return parts.join(', ');
  },

  signature: function signature(credentials, datetime) {
    var signingKey = v4Credentials.getSigningKey(
      credentials,
      datetime.substr(0, 8),
      this.request.region,
      this.serviceName,
      this.signatureCache
    );
    return AWS.util.crypto.hmac(signingKey, this.stringToSign(datetime), 'hex');
  },

  stringToSign: function stringToSign(datetime) {
    var parts = [];
    parts.push('AWS4-HMAC-SHA256');
    parts.push(datetime);
    parts.push(this.credentialString(datetime));
    parts.push(this.hexEncodedHash(this.canonicalString()));
    return parts.join('\n');
  },

  canonicalString: function canonicalString() {
    var parts = [], pathname = this.request.pathname();
    if (this.serviceName !== 's3') pathname = AWS.util.uriEscapePath(pathname);

    parts.push(this.request.method);
    parts.push(pathname);
    parts.push(this.request.search());
    parts.push(this.canonicalHeaders() + '\n');
    parts.push(this.signedHeaders());
    parts.push(this.hexEncodedBodyHash());
    return parts.join('\n');
  },

  canonicalHeaders: function canonicalHeaders() {
    var headers = [];
    AWS.util.each.call(this, this.request.headers, function (key, item) {
      headers.push([key, item]);
    });
    headers.sort(function (a, b) {
      return a[0].toLowerCase() < b[0].toLowerCase() ? -1 : 1;
    });
    var parts = [];
    AWS.util.arrayEach.call(this, headers, function (item) {
      var key = item[0].toLowerCase();
      if (this.isSignableHeader(key)) {
        var value = item[1];
        if (typeof value === 'undefined' || value === null || typeof value.toString !== 'function') {
          throw AWS.util.error(new Error('Header ' + key + ' contains invalid value'), {
            code: 'InvalidHeader'
          });
        }
        parts.push(key + ':' +
          this.canonicalHeaderValues(value.toString()));
      }
    });
    return parts.join('\n');
  },

  canonicalHeaderValues: function canonicalHeaderValues(values) {
    return values.replace(/\s+/g, ' ').replace(/^\s+|\s+$/g, '');
  },

  signedHeaders: function signedHeaders() {
    var keys = [];
    AWS.util.each.call(this, this.request.headers, function (key) {
      key = key.toLowerCase();
      if (this.isSignableHeader(key)) keys.push(key);
    });
    return keys.sort().join(';');
  },

  credentialString: function credentialString(datetime) {
    return v4Credentials.createScope(
      datetime.substr(0, 8),
      this.request.region,
      this.serviceName
    );
  },

  hexEncodedHash: function hash(string) {
    return AWS.util.crypto.sha256(string, 'hex');
  },

  hexEncodedBodyHash: function hexEncodedBodyHash() {
    var request = this.request;
    if (this.isPresigned() && this.serviceName === 's3' && !request.body) {
      return 'UNSIGNED-PAYLOAD';
    } else if (request.headers['X-Amz-Content-Sha256']) {
      return request.headers['X-Amz-Content-Sha256'];
    } else {
      return this.hexEncodedHash(this.request.body || '');
    }
  },

  unsignableHeaders: [
    'authorization',
    'content-type',
    'content-length',
    'user-agent',
    expiresHeader,
    'expect',
    'x-amzn-trace-id'
  ],

  isSignableHeader: function isSignableHeader(key) {
    if (key.toLowerCase().indexOf('x-amz-') === 0) return true;
    return this.unsignableHeaders.indexOf(key) < 0;
  },

  isPresigned: function isPresigned() {
    return this.request.headers[expiresHeader] ? true : false;
  }

});

module.exports = AWS.Signers.V4;


/***/ }),

/***/ "+E39":
/***/ (function(module, exports, __webpack_require__) {

// Thank's IE8 for his funny defineProperty
module.exports = !__webpack_require__("S82l")(function () {
  return Object.defineProperty({}, 'a', { get: function () { return 7; } }).a != 7;
});


/***/ }),

/***/ "+W7P":
/***/ (function(module, exports, __webpack_require__) {

var indexOf = __webpack_require__("Csua");

var Object_keys = function (obj) {
    if (Object.keys) return Object.keys(obj)
    else {
        var res = [];
        for (var key in obj) res.push(key)
        return res;
    }
};

var forEach = function (xs, fn) {
    if (xs.forEach) return xs.forEach(fn)
    else for (var i = 0; i < xs.length; i++) {
        fn(xs[i], i, xs);
    }
};

var defineProp = (function() {
    try {
        Object.defineProperty({}, '_', {});
        return function(obj, name, value) {
            Object.defineProperty(obj, name, {
                writable: true,
                enumerable: false,
                configurable: true,
                value: value
            })
        };
    } catch(e) {
        return function(obj, name, value) {
            obj[name] = value;
        };
    }
}());

var globals = ['Array', 'Boolean', 'Date', 'Error', 'EvalError', 'Function',
'Infinity', 'JSON', 'Math', 'NaN', 'Number', 'Object', 'RangeError',
'ReferenceError', 'RegExp', 'String', 'SyntaxError', 'TypeError', 'URIError',
'decodeURI', 'decodeURIComponent', 'encodeURI', 'encodeURIComponent', 'escape',
'eval', 'isFinite', 'isNaN', 'parseFloat', 'parseInt', 'undefined', 'unescape'];

function Context() {}
Context.prototype = {};

var Script = exports.Script = function NodeScript (code) {
    if (!(this instanceof Script)) return new Script(code);
    this.code = code;
};

Script.prototype.runInContext = function (context) {
    if (!(context instanceof Context)) {
        throw new TypeError("needs a 'context' argument.");
    }
    
    var iframe = document.createElement('iframe');
    if (!iframe.style) iframe.style = {};
    iframe.style.display = 'none';
    
    document.body.appendChild(iframe);
    
    var win = iframe.contentWindow;
    var wEval = win.eval, wExecScript = win.execScript;

    if (!wEval && wExecScript) {
        // win.eval() magically appears when this is called in IE:
        wExecScript.call(win, 'null');
        wEval = win.eval;
    }
    
    forEach(Object_keys(context), function (key) {
        win[key] = context[key];
    });
    forEach(globals, function (key) {
        if (context[key]) {
            win[key] = context[key];
        }
    });
    
    var winKeys = Object_keys(win);

    var res = wEval.call(win, this.code);
    
    forEach(Object_keys(win), function (key) {
        // Avoid copying circular objects like `top` and `window` by only
        // updating existing context properties or new properties in the `win`
        // that was only introduced after the eval.
        if (key in context || indexOf(winKeys, key) === -1) {
            context[key] = win[key];
        }
    });

    forEach(globals, function (key) {
        if (!(key in context)) {
            defineProp(context, key, win[key]);
        }
    });
    
    document.body.removeChild(iframe);
    
    return res;
};

Script.prototype.runInThisContext = function () {
    return eval(this.code); // maybe...
};

Script.prototype.runInNewContext = function (context) {
    var ctx = Script.createContext(context);
    var res = this.runInContext(ctx);

    forEach(Object_keys(ctx), function (key) {
        context[key] = ctx[key];
    });

    return res;
};

forEach(Object_keys(Script.prototype), function (name) {
    exports[name] = Script[name] = function (code) {
        var s = Script(code);
        return s[name].apply(s, [].slice.call(arguments, 1));
    };
});

exports.createScript = function (code) {
    return exports.Script(code);
};

exports.createContext = Script.createContext = function (context) {
    var copy = new Context();
    if(typeof context === 'object') {
        forEach(Object_keys(context), function (key) {
            copy[key] = context[key];
        });
    }
    return copy;
};


/***/ }),

/***/ "+ZMJ":
/***/ (function(module, exports, __webpack_require__) {

// optional / simple context binding
var aFunction = __webpack_require__("lOnJ");
module.exports = function (fn, that, length) {
  aFunction(fn);
  if (that === undefined) return fn;
  switch (length) {
    case 1: return function (a) {
      return fn.call(that, a);
    };
    case 2: return function (a, b) {
      return fn.call(that, a, b);
    };
    case 3: return function (a, b, c) {
      return fn.call(that, a, b, c);
    };
  }
  return function (/* ...args */) {
    return fn.apply(that, arguments);
  };
};


/***/ }),

/***/ "+e0g":
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var hash = __webpack_require__("3PYz");
var elliptic = __webpack_require__("lZ6o");
var utils = elliptic.utils;
var assert = utils.assert;
var parseBytes = utils.parseBytes;
var KeyPair = __webpack_require__("RzOE");
var Signature = __webpack_require__("hkfz");

function EDDSA(curve) {
  assert(curve === 'ed25519', 'only tested with ed25519 so far');

  if (!(this instanceof EDDSA))
    return new EDDSA(curve);

  var curve = elliptic.curves[curve].curve;
  this.curve = curve;
  this.g = curve.g;
  this.g.precompute(curve.n.bitLength() + 1);

  this.pointClass = curve.point().constructor;
  this.encodingLength = Math.ceil(curve.n.bitLength() / 8);
  this.hash = hash.sha512;
}

module.exports = EDDSA;

/**
* @param {Array|String} message - message bytes
* @param {Array|String|KeyPair} secret - secret bytes or a keypair
* @returns {Signature} - signature
*/
EDDSA.prototype.sign = function sign(message, secret) {
  message = parseBytes(message);
  var key = this.keyFromSecret(secret);
  var r = this.hashInt(key.messagePrefix(), message);
  var R = this.g.mul(r);
  var Rencoded = this.encodePoint(R);
  var s_ = this.hashInt(Rencoded, key.pubBytes(), message)
               .mul(key.priv());
  var S = r.add(s_).umod(this.curve.n);
  return this.makeSignature({ R: R, S: S, Rencoded: Rencoded });
};

/**
* @param {Array} message - message bytes
* @param {Array|String|Signature} sig - sig bytes
* @param {Array|String|Point|KeyPair} pub - public key
* @returns {Boolean} - true if public key matches sig of message
*/
EDDSA.prototype.verify = function verify(message, sig, pub) {
  message = parseBytes(message);
  sig = this.makeSignature(sig);
  var key = this.keyFromPublic(pub);
  var h = this.hashInt(sig.Rencoded(), key.pubBytes(), message);
  var SG = this.g.mul(sig.S());
  var RplusAh = sig.R().add(key.pub().mul(h));
  return RplusAh.eq(SG);
};

EDDSA.prototype.hashInt = function hashInt() {
  var hash = this.hash();
  for (var i = 0; i < arguments.length; i++)
    hash.update(arguments[i]);
  return utils.intFromLE(hash.digest()).umod(this.curve.n);
};

EDDSA.prototype.keyFromPublic = function keyFromPublic(pub) {
  return KeyPair.fromPublic(this, pub);
};

EDDSA.prototype.keyFromSecret = function keyFromSecret(secret) {
  return KeyPair.fromSecret(this, secret);
};

EDDSA.prototype.makeSignature = function makeSignature(sig) {
  if (sig instanceof Signature)
    return sig;
  return new Signature(this, sig);
};

/**
* * https://tools.ietf.org/html/draft-josefsson-eddsa-ed25519-03#section-5.2
*
* EDDSA defines methods for encoding and decoding points and integers. These are
* helper convenience methods, that pass along to utility functions implied
* parameters.
*
*/
EDDSA.prototype.encodePoint = function encodePoint(point) {
  var enc = point.getY().toArray('le', this.encodingLength);
  enc[this.encodingLength - 1] |= point.getX().isOdd() ? 0x80 : 0;
  return enc;
};

EDDSA.prototype.decodePoint = function decodePoint(bytes) {
  bytes = utils.parseBytes(bytes);

  var lastIx = bytes.length - 1;
  var normed = bytes.slice(0, lastIx).concat(bytes[lastIx] & ~0x80);
  var xIsOdd = (bytes[lastIx] & 0x80) !== 0;

  var y = utils.intFromLE(normed);
  return this.curve.pointFromY(y, xIsOdd);
};

EDDSA.prototype.encodeInt = function encodeInt(num) {
  return num.toArray('le', this.encodingLength);
};

EDDSA.prototype.decodeInt = function decodeInt(bytes) {
  return utils.intFromLE(bytes);
};

EDDSA.prototype.isPoint = function isPoint(val) {
  return val instanceof this.pointClass;
};


/***/ }),

/***/ "+gg+":
/***/ (function(module, exports, __webpack_require__) {

var root = __webpack_require__("TQ3y");

/** Used to detect overreaching core-js shims. */
var coreJsData = root['__core-js_shared__'];

module.exports = coreJsData;


/***/ }),

/***/ "+jDU":
/***/ (function(module, exports, __webpack_require__) {

var AuthCipher = __webpack_require__("/y0r")
var Buffer = __webpack_require__("X3l8").Buffer
var MODES = __webpack_require__("BCiZ")
var StreamCipher = __webpack_require__("6hW9")
var Transform = __webpack_require__("z+8S")
var aes = __webpack_require__("BEbT")
var ebtk = __webpack_require__("Cgw8")
var inherits = __webpack_require__("LC74")

function Decipher (mode, key, iv) {
  Transform.call(this)

  this._cache = new Splitter()
  this._last = void 0
  this._cipher = new aes.AES(key)
  this._prev = Buffer.from(iv)
  this._mode = mode
  this._autopadding = true
}

inherits(Decipher, Transform)

Decipher.prototype._update = function (data) {
  this._cache.add(data)
  var chunk
  var thing
  var out = []
  while ((chunk = this._cache.get(this._autopadding))) {
    thing = this._mode.decrypt(this, chunk)
    out.push(thing)
  }
  return Buffer.concat(out)
}

Decipher.prototype._final = function () {
  var chunk = this._cache.flush()
  if (this._autopadding) {
    return unpad(this._mode.decrypt(this, chunk))
  } else if (chunk) {
    throw new Error('data not multiple of block length')
  }
}

Decipher.prototype.setAutoPadding = function (setTo) {
  this._autopadding = !!setTo
  return this
}

function Splitter () {
  this.cache = Buffer.allocUnsafe(0)
}

Splitter.prototype.add = function (data) {
  this.cache = Buffer.concat([this.cache, data])
}

Splitter.prototype.get = function (autoPadding) {
  var out
  if (autoPadding) {
    if (this.cache.length > 16) {
      out = this.cache.slice(0, 16)
      this.cache = this.cache.slice(16)
      return out
    }
  } else {
    if (this.cache.length >= 16) {
      out = this.cache.slice(0, 16)
      this.cache = this.cache.slice(16)
      return out
    }
  }

  return null
}

Splitter.prototype.flush = function () {
  if (this.cache.length) return this.cache
}

function unpad (last) {
  var padded = last[15]
  var i = -1
  while (++i < padded) {
    if (last[(i + (16 - padded))] !== padded) {
      throw new Error('unable to decrypt data')
    }
  }
  if (padded === 16) return

  return last.slice(0, 16 - padded)
}

function createDecipheriv (suite, password, iv) {
  var config = MODES[suite.toLowerCase()]
  if (!config) throw new TypeError('invalid suite type')

  if (typeof iv === 'string') iv = Buffer.from(iv)
  if (iv.length !== config.iv) throw new TypeError('invalid iv length ' + iv.length)

  if (typeof password === 'string') password = Buffer.from(password)
  if (password.length !== config.key / 8) throw new TypeError('invalid key length ' + password.length)

  if (config.type === 'stream') {
    return new StreamCipher(config.module, password, iv, true)
  } else if (config.type === 'auth') {
    return new AuthCipher(config.module, password, iv, true)
  }

  return new Decipher(config.module, password, iv)
}

function createDecipher (suite, password) {
  var config = MODES[suite.toLowerCase()]
  if (!config) throw new TypeError('invalid suite type')

  var keys = ebtk(password, false, config.key, config.iv)
  return createDecipheriv(suite, keys.key, keys.iv)
}

exports.createDecipher = createDecipher
exports.createDecipheriv = createDecipheriv


/***/ }),

/***/ "+tPU":
/***/ (function(module, exports, __webpack_require__) {

__webpack_require__("xGkn");
var global = __webpack_require__("7KvD");
var hide = __webpack_require__("hJx8");
var Iterators = __webpack_require__("/bQp");
var TO_STRING_TAG = __webpack_require__("dSzd")('toStringTag');

var DOMIterables = ('CSSRuleList,CSSStyleDeclaration,CSSValueList,ClientRectList,DOMRectList,DOMStringList,' +
  'DOMTokenList,DataTransferItemList,FileList,HTMLAllCollection,HTMLCollection,HTMLFormElement,HTMLSelectElement,' +
  'MediaList,MimeTypeArray,NamedNodeMap,NodeList,PaintRequestList,Plugin,PluginArray,SVGLengthList,SVGNumberList,' +
  'SVGPathSegList,SVGPointList,SVGStringList,SVGTransformList,SourceBufferList,StyleSheetList,TextTrackCueList,' +
  'TextTrackList,TouchList').split(',');

for (var i = 0; i < DOMIterables.length; i++) {
  var NAME = DOMIterables[i];
  var Collection = global[NAME];
  var proto = Collection && Collection.prototype;
  if (proto && !proto[TO_STRING_TAG]) hide(proto, TO_STRING_TAG, NAME);
  Iterators[NAME] = Iterators.Array;
}


/***/ }),

/***/ "+zKj":
/***/ (function(module, exports, __webpack_require__) {

var AWS = __webpack_require__("lYdN");
var inherit = AWS.util.inherit;

/**
 * @api private
 */
AWS.Signers.V3 = inherit(AWS.Signers.RequestSigner, {
  addAuthorization: function addAuthorization(credentials, date) {

    var datetime = AWS.util.date.rfc822(date);

    this.request.headers['X-Amz-Date'] = datetime;

    if (credentials.sessionToken) {
      this.request.headers['x-amz-security-token'] = credentials.sessionToken;
    }

    this.request.headers['X-Amzn-Authorization'] =
      this.authorization(credentials, datetime);

  },

  authorization: function authorization(credentials) {
    return 'AWS3 ' +
      'AWSAccessKeyId=' + credentials.accessKeyId + ',' +
      'Algorithm=HmacSHA256,' +
      'SignedHeaders=' + this.signedHeaders() + ',' +
      'Signature=' + this.signature(credentials);
  },

  signedHeaders: function signedHeaders() {
    var headers = [];
    AWS.util.arrayEach(this.headersToSign(), function iterator(h) {
      headers.push(h.toLowerCase());
    });
    return headers.sort().join(';');
  },

  canonicalHeaders: function canonicalHeaders() {
    var headers = this.request.headers;
    var parts = [];
    AWS.util.arrayEach(this.headersToSign(), function iterator(h) {
      parts.push(h.toLowerCase().trim() + ':' + String(headers[h]).trim());
    });
    return parts.sort().join('\n') + '\n';
  },

  headersToSign: function headersToSign() {
    var headers = [];
    AWS.util.each(this.request.headers, function iterator(k) {
      if (k === 'Host' || k === 'Content-Encoding' || k.match(/^X-Amz/i)) {
        headers.push(k);
      }
    });
    return headers;
  },

  signature: function signature(credentials) {
    return AWS.util.crypto.hmac(credentials.secretAccessKey, this.stringToSign(), 'base64');
  },

  stringToSign: function stringToSign() {
    var parts = [];
    parts.push(this.request.method);
    parts.push('/');
    parts.push('');
    parts.push(this.canonicalHeaders());
    parts.push(this.request.body);
    return AWS.util.crypto.sha256(parts.join('\n'));
  }

});

module.exports = AWS.Signers.V3;


/***/ }),

/***/ "/+PS":
/***/ (function(module, exports, __webpack_require__) {

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var Buffer = __webpack_require__("EuP9").Buffer;

var isBufferEncoding = Buffer.isEncoding
  || function(encoding) {
       switch (encoding && encoding.toLowerCase()) {
         case 'hex': case 'utf8': case 'utf-8': case 'ascii': case 'binary': case 'base64': case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': case 'raw': return true;
         default: return false;
       }
     }


function assertEncoding(encoding) {
  if (encoding && !isBufferEncoding(encoding)) {
    throw new Error('Unknown encoding: ' + encoding);
  }
}

// StringDecoder provides an interface for efficiently splitting a series of
// buffers into a series of JS strings without breaking apart multi-byte
// characters. CESU-8 is handled as part of the UTF-8 encoding.
//
// @TODO Handling all encodings inside a single object makes it very difficult
// to reason about this code, so it should be split up in the future.
// @TODO There should be a utf8-strict encoding that rejects invalid UTF-8 code
// points as used by CESU-8.
var StringDecoder = exports.StringDecoder = function(encoding) {
  this.encoding = (encoding || 'utf8').toLowerCase().replace(/[-_]/, '');
  assertEncoding(encoding);
  switch (this.encoding) {
    case 'utf8':
      // CESU-8 represents each of Surrogate Pair by 3-bytes
      this.surrogateSize = 3;
      break;
    case 'ucs2':
    case 'utf16le':
      // UTF-16 represents each of Surrogate Pair by 2-bytes
      this.surrogateSize = 2;
      this.detectIncompleteChar = utf16DetectIncompleteChar;
      break;
    case 'base64':
      // Base-64 stores 3 bytes in 4 chars, and pads the remainder.
      this.surrogateSize = 3;
      this.detectIncompleteChar = base64DetectIncompleteChar;
      break;
    default:
      this.write = passThroughWrite;
      return;
  }

  // Enough space to store all bytes of a single character. UTF-8 needs 4
  // bytes, but CESU-8 may require up to 6 (3 bytes per surrogate).
  this.charBuffer = new Buffer(6);
  // Number of bytes received for the current incomplete multi-byte character.
  this.charReceived = 0;
  // Number of bytes expected for the current incomplete multi-byte character.
  this.charLength = 0;
};


// write decodes the given buffer and returns it as JS string that is
// guaranteed to not contain any partial multi-byte characters. Any partial
// character found at the end of the buffer is buffered up, and will be
// returned when calling write again with the remaining bytes.
//
// Note: Converting a Buffer containing an orphan surrogate to a String
// currently works, but converting a String to a Buffer (via `new Buffer`, or
// Buffer#write) will replace incomplete surrogates with the unicode
// replacement character. See https://codereview.chromium.org/121173009/ .
StringDecoder.prototype.write = function(buffer) {
  var charStr = '';
  // if our last write ended with an incomplete multibyte character
  while (this.charLength) {
    // determine how many remaining bytes this buffer has to offer for this char
    var available = (buffer.length >= this.charLength - this.charReceived) ?
        this.charLength - this.charReceived :
        buffer.length;

    // add the new bytes to the char buffer
    buffer.copy(this.charBuffer, this.charReceived, 0, available);
    this.charReceived += available;

    if (this.charReceived < this.charLength) {
      // still not enough chars in this buffer? wait for more ...
      return '';
    }

    // remove bytes belonging to the current character from the buffer
    buffer = buffer.slice(available, buffer.length);

    // get the character that was split
    charStr = this.charBuffer.slice(0, this.charLength).toString(this.encoding);

    // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character
    var charCode = charStr.charCodeAt(charStr.length - 1);
    if (charCode >= 0xD800 && charCode <= 0xDBFF) {
      this.charLength += this.surrogateSize;
      charStr = '';
      continue;
    }
    this.charReceived = this.charLength = 0;

    // if there are no more bytes in this buffer, just emit our char
    if (buffer.length === 0) {
      return charStr;
    }
    break;
  }

  // determine and set charLength / charReceived
  this.detectIncompleteChar(buffer);

  var end = buffer.length;
  if (this.charLength) {
    // buffer the incomplete character bytes we got
    buffer.copy(this.charBuffer, 0, buffer.length - this.charReceived, end);
    end -= this.charReceived;
  }

  charStr += buffer.toString(this.encoding, 0, end);

  var end = charStr.length - 1;
  var charCode = charStr.charCodeAt(end);
  // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character
  if (charCode >= 0xD800 && charCode <= 0xDBFF) {
    var size = this.surrogateSize;
    this.charLength += size;
    this.charReceived += size;
    this.charBuffer.copy(this.charBuffer, size, 0, size);
    buffer.copy(this.charBuffer, 0, 0, size);
    return charStr.substring(0, end);
  }

  // or just emit the charStr
  return charStr;
};

// detectIncompleteChar determines if there is an incomplete UTF-8 character at
// the end of the given buffer. If so, it sets this.charLength to the byte
// length that character, and sets this.charReceived to the number of bytes
// that are available for this character.
StringDecoder.prototype.detectIncompleteChar = function(buffer) {
  // determine how many bytes we have to check at the end of this buffer
  var i = (buffer.length >= 3) ? 3 : buffer.length;

  // Figure out if one of the last i bytes of our buffer announces an
  // incomplete char.
  for (; i > 0; i--) {
    var c = buffer[buffer.length - i];

    // See http://en.wikipedia.org/wiki/UTF-8#Description

    // 110XXXXX
    if (i == 1 && c >> 5 == 0x06) {
      this.charLength = 2;
      break;
    }

    // 1110XXXX
    if (i <= 2 && c >> 4 == 0x0E) {
      this.charLength = 3;
      break;
    }

    // 11110XXX
    if (i <= 3 && c >> 3 == 0x1E) {
      this.charLength = 4;
      break;
    }
  }
  this.charReceived = i;
};

StringDecoder.prototype.end = function(buffer) {
  var res = '';
  if (buffer && buffer.length)
    res = this.write(buffer);

  if (this.charReceived) {
    var cr = this.charReceived;
    var buf = this.charBuffer;
    var enc = this.encoding;
    res += buf.slice(0, cr).toString(enc);
  }

  return res;
};

function passThroughWrite(buffer) {
  return buffer.toString(this.encoding);
}

function utf16DetectIncompleteChar(buffer) {
  this.charReceived = buffer.length % 2;
  this.charLength = this.charReceived ? 2 : 0;
}

function base64DetectIncompleteChar(buffer) {
  this.charReceived = buffer.length % 3;
  this.charLength = this.charReceived ? 3 : 0;
}


/***/ }),

/***/ "//Fk":
/***/ (function(module, exports, __webpack_require__) {

module.exports = { "default": __webpack_require__("U5ju"), __esModule: true };

/***/ }),

/***/ "/GnY":
/***/ (function(module, exports, __webpack_require__) {

var isPrototype = __webpack_require__("HT7L"),
    nativeKeys = __webpack_require__("W529");

/** Used for built-in method references. */
var objectProto = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;

/**
 * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 */
function baseKeys(object) {
  if (!isPrototype(object)) {
    return nativeKeys(object);
  }
  var result = [];
  for (var key in Object(object)) {
    if (hasOwnProperty.call(object, key) && key != 'constructor') {
      result.push(key);
    }
  }
  return result;
}

module.exports = baseKeys;


/***/ }),

/***/ "/I3N":
/***/ (function(module, exports) {

/**
 * Checks if `value` is suitable for use as unique object key.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
 */
function isKeyable(value) {
  var type = typeof value;
  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
    ? (value !== '__proto__')
    : (value === null);
}

module.exports = isKeyable;


/***/ }),

/***/ "/ZKK":
/***/ (function(module, exports, __webpack_require__) {

var util = __webpack_require__("t7mJ");
var builder = __webpack_require__("1qKq");

function XmlBuilder() { }

XmlBuilder.prototype.toXML = function(params, shape, rootElement, noEmpty) {
  var xml = builder.create(rootElement);
  applyNamespaces(xml, shape);
  serialize(xml, params, shape);
  return xml.children.length > 0 || noEmpty ? xml.root().toString() : '';
};

function serialize(xml, value, shape) {
  switch (shape.type) {
    case 'structure': return serializeStructure(xml, value, shape);
    case 'map': return serializeMap(xml, value, shape);
    case 'list': return serializeList(xml, value, shape);
    default: return serializeScalar(xml, value, shape);
  }
}

function serializeStructure(xml, params, shape) {
  util.arrayEach(shape.memberNames, function(memberName) {
    var memberShape = shape.members[memberName];
    if (memberShape.location !== 'body') return;

    var value = params[memberName];
    var name = memberShape.name;
    if (value !== undefined && value !== null) {
      if (memberShape.isXmlAttribute) {
        xml.att(name, value);
      } else if (memberShape.flattened) {
        serialize(xml, value, memberShape);
      } else {
        var element = xml.ele(name);
        applyNamespaces(element, memberShape);
        serialize(element, value, memberShape);
      }
    }
  });
}

function serializeMap(xml, map, shape) {
  var xmlKey = shape.key.name || 'key';
  var xmlValue = shape.value.name || 'value';

  util.each(map, function(key, value) {
    var entry = xml.ele(shape.flattened ? shape.name : 'entry');
    serialize(entry.ele(xmlKey), key, shape.key);
    serialize(entry.ele(xmlValue), value, shape.value);
  });
}

function serializeList(xml, list, shape) {
  if (shape.flattened) {
    util.arrayEach(list, function(value) {
      var name = shape.member.name || shape.name;
      var element = xml.ele(name);
      serialize(element, value, shape.member);
    });
  } else {
    util.arrayEach(list, function(value) {
      var name = shape.member.name || 'member';
      var element = xml.ele(name);
      serialize(element, value, shape.member);
    });
  }
}

function serializeScalar(xml, value, shape) {
  xml.txt(shape.toWireFormat(value));
}

function applyNamespaces(xml, shape) {
  var uri, prefix = 'xmlns';
  if (shape.xmlNamespaceUri) {
    uri = shape.xmlNamespaceUri;
    if (shape.xmlNamespacePrefix) prefix += ':' + shape.xmlNamespacePrefix;
  } else if (xml.isRoot && shape.api.xmlNamespaceUri) {
    uri = shape.api.xmlNamespaceUri;
  }

  if (uri) xml.att(prefix, uri);
}

module.exports = XmlBuilder;


/***/ }),

/***/ "/bQp":
/***/ (function(module, exports) {

module.exports = {};


/***/ }),

/***/ "/h6o":
/***/ (function(module, exports, __webpack_require__) {

var AWS = __webpack_require__("lYdN");

var inherit = AWS.util.inherit;

/**
 * @api private
 */
AWS.Signers.RequestSigner = inherit({
  constructor: function RequestSigner(request) {
    this.request = request;
  },

  setServiceClientId: function setServiceClientId(id) {
    this.serviceClientId = id;
  },

  getServiceClientId: function getServiceClientId() {
    return this.serviceClientId;
  }
});

AWS.Signers.RequestSigner.getVersion = function getVersion(version) {
  switch (version) {
    case 'v2': return AWS.Signers.V2;
    case 'v3': return AWS.Signers.V3;
    case 'v4': return AWS.Signers.V4;
    case 's3': return AWS.Signers.S3;
    case 'v3https': return AWS.Signers.V3Https;
  }
  throw new Error('Unknown signing version ' + version);
};

__webpack_require__("mfx1");
__webpack_require__("+zKj");
__webpack_require__("FWNh");
__webpack_require__("+9Es");
__webpack_require__("iRHH");
__webpack_require__("g7Ip");


/***/ }),

/***/ "/jw5":
/***/ (function(module, exports) {

function AcceptorStateMachine(states, state) {
  this.currentState = state || null;
  this.states = states || {};
}

AcceptorStateMachine.prototype.runTo = function runTo(finalState, done, bindObject, inputError) {
  if (typeof finalState === 'function') {
    inputError = bindObject; bindObject = done;
    done = finalState; finalState = null;
  }

  var self = this;
  var state = self.states[self.currentState];
  state.fn.call(bindObject || self, inputError, function(err) {
    if (err) {
      if (state.fail) self.currentState = state.fail;
      else return done ? done.call(bindObject, err) : null;
    } else {
      if (state.accept) self.currentState = state.accept;
      else return done ? done.call(bindObject) : null;
    }
    if (self.currentState === finalState) {
      return done ? done.call(bindObject, err) : null;
    }

    self.runTo(finalState, done, bindObject, err);
  });
};

AcceptorStateMachine.prototype.addState = function addState(name, acceptState, failState, fn) {
  if (typeof acceptState === 'function') {
    fn = acceptState; acceptState = null; failState = null;
  } else if (typeof failState === 'function') {
    fn = failState; failState = null;
  }

  if (!this.currentState) this.currentState = name;
  this.states[name] = { accept: acceptState, fail: failState, fn: fn };
  return this;
};

module.exports = AcceptorStateMachine;


/***/ }),

/***/ "/n6Q":
/***/ (function(module, exports, __webpack_require__) {

__webpack_require__("zQR9");
__webpack_require__("+tPU");
module.exports = __webpack_require__("Kh4W").f('iterator');


/***/ }),

/***/ "/vd3":
/***/ (function(module, exports, __webpack_require__) {


exports.pbkdf2 = __webpack_require__("GUE9")

exports.pbkdf2Sync = __webpack_require__("Zq1s")


/***/ }),

/***/ "/y0r":
/***/ (function(module, exports, __webpack_require__) {

var aes = __webpack_require__("BEbT")
var Buffer = __webpack_require__("X3l8").Buffer
var Transform = __webpack_require__("z+8S")
var inherits = __webpack_require__("LC74")
var GHASH = __webpack_require__("UPHp")
var xor = __webpack_require__("H2Pp")

function xorTest (a, b) {
  var out = 0
  if (a.length !== b.length) out++

  var len = Math.min(a.length, b.length)
  for (var i = 0; i < len; ++i) {
    out += (a[i] ^ b[i])
  }

  return out
}

function StreamCipher (mode, key, iv, decrypt) {
  Transform.call(this)

  this._finID = Buffer.concat([iv, Buffer.from([0, 0, 0, 1])])
  iv = Buffer.concat([iv, Buffer.from([0, 0, 0, 2])])

  this._cipher = new aes.AES(key)
  this._prev = Buffer.from(iv)
  this._cache = Buffer.allocUnsafe(0)
  this._secCache = Buffer.allocUnsafe(0)
  this._decrypt = decrypt
  this._alen = 0
  this._len = 0
  this._mode = mode

  var h = Buffer.alloc(4, 0)
  this._ghash = new GHASH(this._cipher.encryptBlock(h))
  this._authTag = null
  this._called = false
}

inherits(StreamCipher, Transform)

StreamCipher.prototype._update = function (chunk) {
  if (!this._called && this._alen) {
    var rump = 16 - (this._alen % 16)
    if (rump < 16) {
      rump = Buffer.alloc(rump, 0)
      this._ghash.update(rump)
    }
  }

  this._called = true
  var out = this._mode.encrypt(this, chunk)
  if (this._decrypt) {
    this._ghash.update(chunk)
  } else {
    this._ghash.update(out)
  }
  this._len += chunk.length
  return out
}

StreamCipher.prototype._final = function () {
  if (this._decrypt && !this._authTag) throw new Error('Unsupported state or unable to authenticate data')

  var tag = xor(this._ghash.final(this._alen * 8, this._len * 8), this._cipher.encryptBlock(this._finID))
  if (this._decrypt && xorTest(tag, this._authTag)) throw new Error('Unsupported state or unable to authenticate data')

  this._authTag = tag
  this._cipher.scrub()
}

StreamCipher.prototype.getAuthTag = function getAuthTag () {
  if (this._decrypt || !Buffer.isBuffer(this._authTag)) throw new Error('Attempting to get auth tag in unsupported state')

  return this._authTag
}

StreamCipher.prototype.setAuthTag = function setAuthTag (tag) {
  if (!this._decrypt) throw new Error('Attempting to set auth tag in unsupported state')

  this._authTag = tag
}

StreamCipher.prototype.setAAD = function setAAD (buf) {
  if (this._called) throw new Error('Attempting to set AAD in unsupported state')

  this._ghash.update(buf)
  this._alen += buf.length
}

module.exports = StreamCipher


/***/ }),

/***/ "0+Qo":
/***/ (function(module, exports, __webpack_require__) {

"use strict";
/* WEBPACK VAR INJECTION */(function(global, process) {// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.



/*<replacement>*/

var processNextTick = __webpack_require__("ypnx");
/*</replacement>*/

module.exports = Readable;

/*<replacement>*/
var isArray = __webpack_require__("d0pw");
/*</replacement>*/

/*<replacement>*/
var Duplex;
/*</replacement>*/

Readable.ReadableState = ReadableState;

/*<replacement>*/
var EE = __webpack_require__("vzCy").EventEmitter;

var EElistenerCount = function (emitter, type) {
  return emitter.listeners(type).length;
};
/*</replacement>*/

/*<replacement>*/
var Stream = __webpack_require__("VIdT");
/*</replacement>*/

// TODO(bmeurer): Change this back to const once hole checks are
// properly optimized away early in Ignition+TurboFan.
/*<replacement>*/
var Buffer = __webpack_require__("X3l8").Buffer;
var OurUint8Array = global.Uint8Array || function () {};
function _uint8ArrayToBuffer(chunk) {
  return Buffer.from(chunk);
}
function _isUint8Array(obj) {
  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
}
/*</replacement>*/

/*<replacement>*/
var util = __webpack_require__("jOgh");
util.inherits = __webpack_require__("LC74");
/*</replacement>*/

/*<replacement>*/
var debugUtil = __webpack_require__(1);
var debug = void 0;
if (debugUtil && debugUtil.debuglog) {
  debug = debugUtil.debuglog('stream');
} else {
  debug = function () {};
}
/*</replacement>*/

var BufferList = __webpack_require__("ASRf");
var destroyImpl = __webpack_require__("mcgU");
var StringDecoder;

util.inherits(Readable, Stream);

var kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];

function prependListener(emitter, event, fn) {
  // Sadly this is not cacheable as some libraries bundle their own
  // event emitter implementation with them.
  if (typeof emitter.prependListener === 'function') {
    return emitter.prependListener(event, fn);
  } else {
    // This is a hack to make sure that our error handler is attached before any
    // userland ones.  NEVER DO THIS. This is here only because this code needs
    // to continue to work with older versions of Node.js that do not include
    // the prependListener() method. The goal is to eventually remove this hack.
    if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
  }
}

function ReadableState(options, stream) {
  Duplex = Duplex || __webpack_require__("8XbR");

  options = options || {};

  // object stream flag. Used to make read(n) ignore n and to
  // make all the buffer merging and length checks go away
  this.objectMode = !!options.objectMode;

  if (stream instanceof Duplex) this.objectMode = this.objectMode || !!options.readableObjectMode;

  // the point at which it stops calling _read() to fill the buffer
  // Note: 0 is a valid value, means "don't call _read preemptively ever"
  var hwm = options.highWaterMark;
  var defaultHwm = this.objectMode ? 16 : 16 * 1024;
  this.highWaterMark = hwm || hwm === 0 ? hwm : defaultHwm;

  // cast to ints.
  this.highWaterMark = Math.floor(this.highWaterMark);

  // A linked list is used to store data chunks instead of an array because the
  // linked list can remove elements from the beginning faster than
  // array.shift()
  this.buffer = new BufferList();
  this.length = 0;
  this.pipes = null;
  this.pipesCount = 0;
  this.flowing = null;
  this.ended = false;
  this.endEmitted = false;
  this.reading = false;

  // a flag to be able to tell if the event 'readable'/'data' is emitted
  // immediately, or on a later tick.  We set this to true at first, because
  // any actions that shouldn't happen until "later" should generally also
  // not happen before the first read call.
  this.sync = true;

  // whenever we return null, then we set a flag to say
  // that we're awaiting a 'readable' event emission.
  this.needReadable = false;
  this.emittedReadable = false;
  this.readableListening = false;
  this.resumeScheduled = false;

  // has it been destroyed
  this.destroyed = false;

  // Crypto is kind of old and crusty.  Historically, its default string
  // encoding is 'binary' so we have to make this configurable.
  // Everything else in the universe uses 'utf8', though.
  this.defaultEncoding = options.defaultEncoding || 'utf8';

  // the number of writers that are awaiting a drain event in .pipe()s
  this.awaitDrain = 0;

  // if true, a maybeReadMore has been scheduled
  this.readingMore = false;

  this.decoder = null;
  this.encoding = null;
  if (options.encoding) {
    if (!StringDecoder) StringDecoder = __webpack_require__("/+PS").StringDecoder;
    this.decoder = new StringDecoder(options.encoding);
    this.encoding = options.encoding;
  }
}

function Readable(options) {
  Duplex = Duplex || __webpack_require__("8XbR");

  if (!(this instanceof Readable)) return new Readable(options);

  this._readableState = new ReadableState(options, this);

  // legacy
  this.readable = true;

  if (options) {
    if (typeof options.read === 'function') this._read = options.read;

    if (typeof options.destroy === 'function') this._destroy = options.destroy;
  }

  Stream.call(this);
}

Object.defineProperty(Readable.prototype, 'destroyed', {
  get: function () {
    if (this._readableState === undefined) {
      return false;
    }
    return this._readableState.destroyed;
  },
  set: function (value) {
    // we ignore the value if the stream
    // has not been initialized yet
    if (!this._readableState) {
      return;
    }

    // backward compatibility, the user is explicitly
    // managing destroyed
    this._readableState.destroyed = value;
  }
});

Readable.prototype.destroy = destroyImpl.destroy;
Readable.prototype._undestroy = destroyImpl.undestroy;
Readable.prototype._destroy = function (err, cb) {
  this.push(null);
  cb(err);
};

// Manually shove something into the read() buffer.
// This returns true if the highWaterMark has not been hit yet,
// similar to how Writable.write() returns true if you should
// write() some more.
Readable.prototype.push = function (chunk, encoding) {
  var state = this._readableState;
  var skipChunkCheck;

  if (!state.objectMode) {
    if (typeof chunk === 'string') {
      encoding = encoding || state.defaultEncoding;
      if (encoding !== state.encoding) {
        chunk = Buffer.from(chunk, encoding);
        encoding = '';
      }
      skipChunkCheck = true;
    }
  } else {
    skipChunkCheck = true;
  }

  return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);
};

// Unshift should *always* be something directly out of read()
Readable.prototype.unshift = function (chunk) {
  return readableAddChunk(this, chunk, null, true, false);
};

function readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {
  var state = stream._readableState;
  if (chunk === null) {
    state.reading = false;
    onEofChunk(stream, state);
  } else {
    var er;
    if (!skipChunkCheck) er = chunkInvalid(state, chunk);
    if (er) {
      stream.emit('error', er);
    } else if (state.objectMode || chunk && chunk.length > 0) {
      if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {
        chunk = _uint8ArrayToBuffer(chunk);
      }

      if (addToFront) {
        if (state.endEmitted) stream.emit('error', new Error('stream.unshift() after end event'));else addChunk(stream, state, chunk, true);
      } else if (state.ended) {
        stream.emit('error', new Error('stream.push() after EOF'));
      } else {
        state.reading = false;
        if (state.decoder && !encoding) {
          chunk = state.decoder.write(chunk);
          if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);
        } else {
          addChunk(stream, state, chunk, false);
        }
      }
    } else if (!addToFront) {
      state.reading = false;
    }
  }

  return needMoreData(state);
}

function addChunk(stream, state, chunk, addToFront) {
  if (state.flowing && state.length === 0 && !state.sync) {
    stream.emit('data', chunk);
    stream.read(0);
  } else {
    // update the buffer info.
    state.length += state.objectMode ? 1 : chunk.length;
    if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);

    if (state.needReadable) emitReadable(stream);
  }
  maybeReadMore(stream, state);
}

function chunkInvalid(state, chunk) {
  var er;
  if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
    er = new TypeError('Invalid non-strin