(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.tus = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = fingerprint;

var _isReactNative = _dereq_("./isReactNative");

var _isReactNative2 = _interopRequireDefault(_isReactNative);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Generate a fingerprint for a file which will be used the store the endpoint
 *
 * @param {File} file
 * @param {Object} options
 * @param {Function} callback
 */
function fingerprint(file, options, callback) {
  if ((0, _isReactNative2.default)()) {
    return callback(null, reactNativeFingerprint(file, options));
  }

  return callback(null, ["tus-br", file.name, file.type, file.size, file.lastModified, options.endpoint].join("-"));
}

function reactNativeFingerprint(file, options) {
  var exifHash = file.exif ? hashCode(JSON.stringify(file.exif)) : "noexif";
  return ["tus-rn", file.name || "noname", file.size || "nosize", exifHash, options.endpoint].join("/");
}

function hashCode(str) {
  // from https://stackoverflow.com/a/8831937/151666
  var hash = 0;
  if (str.length === 0) {
    return hash;
  }
  for (var i = 0; i < str.length; i++) {
    var char = str.charCodeAt(i);
    hash = (hash << 5) - hash + char;
    hash = hash & hash; // Convert to 32bit integer
  }
  return hash;
}

},{"./isReactNative":3}],2:[function(_dereq_,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
var isCordova = function isCordova() {
  return typeof window != "undefined" && (typeof window.PhoneGap != "undefined" || typeof window.Cordova != "undefined" || typeof window.cordova != "undefined");
};

exports.default = isCordova;

},{}],3:[function(_dereq_,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
var isReactNative = function isReactNative() {
  return typeof navigator !== "undefined" && typeof navigator.product === "string" && navigator.product.toLowerCase() === "reactnative";
};

exports.default = isReactNative;

},{}],4:[function(_dereq_,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
/**
 * readAsByteArray converts a File object to a Uint8Array.
 * This function is only used on the Apache Cordova platform.
 * See https://cordova.apache.org/docs/en/latest/reference/cordova-plugin-file/index.html#read-a-file
 */
function readAsByteArray(chunk, callback) {
  var reader = new FileReader();
  reader.onload = function () {
    callback(null, new Uint8Array(reader.result));
  };
  reader.onerror = function (err) {
    callback(err);
  };
  reader.readAsArrayBuffer(chunk);
}

exports.default = readAsByteArray;

},{}],5:[function(_dereq_,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.newRequest = newRequest;
exports.resolveUrl = resolveUrl;

var _urlParse = _dereq_("url-parse");

var _urlParse2 = _interopRequireDefault(_urlParse);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function newRequest() {
  return new window.XMLHttpRequest();
} /* global window */
function resolveUrl(origin, link) {
  return new _urlParse2.default(link, origin).toString();
}

},{"url-parse":16}],6:[function(_dereq_,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

exports.getSource = getSource;

var _isReactNative = _dereq_("./isReactNative");

var _isReactNative2 = _interopRequireDefault(_isReactNative);

var _uriToBlob = _dereq_("./uriToBlob");

var _uriToBlob2 = _interopRequireDefault(_uriToBlob);

var _isCordova = _dereq_("./isCordova");

var _isCordova2 = _interopRequireDefault(_isCordova);

var _readAsByteArray = _dereq_("./readAsByteArray");

var _readAsByteArray2 = _interopRequireDefault(_readAsByteArray);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var FileSource = function () {
  function FileSource(file) {
    _classCallCheck(this, FileSource);

    this._file = file;
    this.size = file.size;
  }

  _createClass(FileSource, [{
    key: "slice",
    value: function slice(start, end, callback) {
      // In Apache Cordova applications, a File must be resolved using
      // FileReader instances, see
      // https://cordova.apache.org/docs/en/8.x/reference/cordova-plugin-file/index.html#read-a-file
      if ((0, _isCordova2.default)()) {
        (0, _readAsByteArray2.default)(this._file.slice(start, end), function (err, chunk) {
          if (err) return callback(err);

          callback(null, chunk);
        });
        return;
      }

      callback(null, this._file.slice(start, end));
    }
  }, {
    key: "close",
    value: function close() {}
  }]);

  return FileSource;
}();

var StreamSource = function () {
  function StreamSource(reader, chunkSize) {
    _classCallCheck(this, StreamSource);

    this._chunkSize = chunkSize;
    this._buffer = undefined;
    this._bufferOffset = 0;
    this._reader = reader;
    this._done = false;
  }

  _createClass(StreamSource, [{
    key: "slice",
    value: function slice(start, end, callback) {
      if (start < this._bufferOffset) {
        callback(new Error("Requested data is before the reader's current offset"));
        return;
      }

      return this._readUntilEnoughDataOrDone(start, end, callback);
    }
  }, {
    key: "_readUntilEnoughDataOrDone",
    value: function _readUntilEnoughDataOrDone(start, end, callback) {
      var _this = this;

      var hasEnoughData = end <= this._bufferOffset + len(this._buffer);
      if (this._done || hasEnoughData) {
        var value = this._getDataFromBuffer(start, end);
        callback(null, value, value == null ? this._done : false);
        return;
      }
      this._reader.read().then(function (_ref) {
        var value = _ref.value,
            done = _ref.done;

        if (done) {
          _this._done = true;
        } else if (_this._buffer === undefined) {
          _this._buffer = value;
        } else {
          _this._buffer = concat(_this._buffer, value);
        }

        _this._readUntilEnoughDataOrDone(start, end, callback);
      }).catch(function (err) {
        callback(new Error("Error during read: " + err));
      });
    }
  }, {
    key: "_getDataFromBuffer",
    value: function _getDataFromBuffer(start, end) {
      // Remove data from buffer before `start`.
      // Data might be reread from the buffer if an upload fails, so we can only
      // safely delete data when it comes *before* what is currently being read.
      if (start > this._bufferOffset) {
        this._buffer = this._buffer.slice(start - this._bufferOffset);
        this._bufferOffset = start;
      }
      // If the buffer is empty after removing old data, all data has been read.
      var hasAllDataBeenRead = len(this._buffer) === 0;
      if (this._done && hasAllDataBeenRead) {
        return null;
      }
      // We already removed data before `start`, so we just return the first
      // chunk from the buffer.
      return this._buffer.slice(0, end - start);
    }
  }, {
    key: "close",
    value: function close() {
      if (this._reader.cancel) {
        this._reader.cancel();
      }
    }
  }]);

  return StreamSource;
}();

function len(blobOrArray) {
  if (blobOrArray === undefined) return 0;
  if (blobOrArray.size !== undefined) return blobOrArray.size;
  return blobOrArray.length;
}

/*
  Typed arrays and blobs don't have a concat method.
  This function helps StreamSource accumulate data to reach chunkSize.
*/
function concat(a, b) {
  if (a.concat) {
    // Is `a` an Array?
    return a.concat(b);
  }
  if (a instanceof Blob) {
    return new Blob([a, b], { type: a.type });
  }
  if (a.set) {
    // Is `a` a typed array?
    var c = new a.constructor(a.length + b.length);
    c.set(a);
    c.set(b, a.length);
    return c;
  }
  throw new Error("Unknown data type");
}

function getSource(input, chunkSize, callback) {
  // In React Native, when user selects a file, instead of a File or Blob,
  // you usually get a file object {} with a uri property that contains
  // a local path to the file. We use XMLHttpRequest to fetch
  // the file blob, before uploading with tus.
  if ((0, _isReactNative2.default)() && input && typeof input.uri !== "undefined") {
    (0, _uriToBlob2.default)(input.uri, function (err, blob) {
      if (err) {
        return callback(new Error("tus: cannot fetch `file.uri` as Blob, make sure the uri is correct and accessible. " + err));
      }
      callback(null, new FileSource(blob));
    });
    return;
  }

  // Since we emulate the Blob type in our tests (not all target browsers
  // support it), we cannot use `instanceof` for testing whether the input value
  // can be handled. Instead, we simply check is the slice() function and the
  // size property are available.
  if (typeof input.slice === "function" && typeof input.size !== "undefined") {
    callback(null, new FileSource(input));
    return;
  }

  if (typeof input.read === "function") {
    chunkSize = +chunkSize;
    if (!isFinite(chunkSize)) {
      callback(new Error("cannot create source for stream without a finite value for the `chunkSize` option"));
      return;
    }
    callback(null, new StreamSource(input, chunkSize));
    return;
  }

  callback(new Error("source object may only be an instance of File, Blob, or Reader in this environment"));
}

},{"./isCordova":2,"./isReactNative":3,"./readAsByteArray":4,"./uriToBlob":8}],7:[function(_dereq_,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

exports.getStorage = getStorage;

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

/* global window, localStorage */

var hasStorage = false;
try {
  hasStorage = "localStorage" in window;

  // Attempt to store and read entries from the local storage to detect Private
  // Mode on Safari on iOS (see #49)
  var key = "tusSupport";
  localStorage.setItem(key, localStorage.getItem(key));
} catch (e) {
  // If we try to access localStorage inside a sandboxed iframe, a SecurityError
  // is thrown. When in private mode on iOS Safari, a QuotaExceededError is
  // thrown (see #49)
  if (e.code === e.SECURITY_ERR || e.code === e.QUOTA_EXCEEDED_ERR) {
    hasStorage = false;
  } else {
    throw e;
  }
}

var canStoreURLs = exports.canStoreURLs = hasStorage;

var LocalStorage = function () {
  function LocalStorage() {
    _classCallCheck(this, LocalStorage);
  }

  _createClass(LocalStorage, [{
    key: "setItem",
    value: function setItem(key, value, cb) {
      cb(null, localStorage.setItem(key, value));
    }
  }, {
    key: "getItem",
    value: function getItem(key, cb) {
      cb(null, localStorage.getItem(key));
    }
  }, {
    key: "removeItem",
    value: function removeItem(key, cb) {
      cb(null, localStorage.removeItem(key));
    }
  }]);

  return LocalStorage;
}();

function getStorage() {
  return hasStorage ? new LocalStorage() : null;
}

},{}],8:[function(_dereq_,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
/**
 * uriToBlob resolves a URI to a Blob object. This is used for
 * React Native to retrieve a file (identified by a file://
 * URI) as a blob.
 */
function uriToBlob(uri, done) {
  var xhr = new XMLHttpRequest();
  xhr.responseType = "blob";
  xhr.onload = function () {
    var blob = xhr.response;
    done(null, blob);
  };
  xhr.onerror = function (err) {
    done(err);
  };
  xhr.open("GET", uri);
  xhr.send();
}

exports.default = uriToBlob;

},{}],9:[function(_dereq_,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var DetailedError = function (_Error) {
  _inherits(DetailedError, _Error);

  function DetailedError(error) {
    var causingErr = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;
    var xhr = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;

    _classCallCheck(this, DetailedError);

    var _this = _possibleConstructorReturn(this, (DetailedError.__proto__ || Object.getPrototypeOf(DetailedError)).call(this, error.message));

    _this.originalRequest = xhr;
    _this.causingError = causingErr;

    var message = error.message;
    if (causingErr != null) {
      message += ", caused by " + causingErr.toString();
    }
    if (xhr != null) {
      message += ", originated from request (response code: " + xhr.status + ", response text: " + xhr.responseText + ")";
    }
    _this.message = message;
    return _this;
  }

  return DetailedError;
}(Error);

exports.default = DetailedError;

},{}],10:[function(_dereq_,module,exports){
"use strict";

var _upload = _dereq_("./upload");

var _upload2 = _interopRequireDefault(_upload);

var _storage = _dereq_("./node/storage");

var storage = _interopRequireWildcard(_storage);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/* global window */
var defaultOptions = _upload2.default.defaultOptions;


var moduleExport = {
  Upload: _upload2.default,
  canStoreURLs: storage.canStoreURLs,
  defaultOptions: defaultOptions
};

if (typeof window !== "undefined") {
  // Browser environment using XMLHttpRequest
  var _window = window,
      XMLHttpRequest = _window.XMLHttpRequest,
      Blob = _window.Blob;


  moduleExport.isSupported = XMLHttpRequest && Blob && typeof Blob.prototype.slice === "function";
} else {
  // Node.js environment using http module
  moduleExport.isSupported = true;
  // make FileStorage module available as it will not be set by default.
  moduleExport.FileStorage = storage.FileStorage;
}

// The usage of the commonjs exporting syntax instead of the new ECMAScript
// one is actually inteded and prevents weird behaviour if we are trying to
// import this module in another module using Babel.
module.exports = moduleExport;

},{"./node/storage":7,"./upload":11}],11:[function(_dereq_,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); /* global window */


// We import the files used inside the Node environment which are rewritten
// for browsers using the rules defined in the package.json


var _error = _dereq_("./error");

var _error2 = _interopRequireDefault(_error);

var _extend = _dereq_("extend");

var _extend2 = _interopRequireDefault(_extend);

var _jsBase = _dereq_("js-base64");

var _request = _dereq_("./node/request");

var _source = _dereq_("./node/source");

var _storage = _dereq_("./node/storage");

var _fingerprint = _dereq_("./node/fingerprint");

var _fingerprint2 = _interopRequireDefault(_fingerprint);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var defaultOptions = {
  endpoint: null,
  fingerprint: _fingerprint2.default,
  resume: true,
  onProgress: null,
  onChunkComplete: null,
  onSuccess: null,
  onError: null,
  headers: {},
  chunkSize: Infinity,
  withCredentials: false,
  uploadUrl: null,
  uploadSize: null,
  overridePatchMethod: false,
  retryDelays: null,
  removeFingerprintOnSuccess: false,
  uploadLengthDeferred: false,
  urlStorage: null,
  fileReader: null,
  uploadDataDuringCreation: false
};

var Upload = function () {
  function Upload(file, options) {
    _classCallCheck(this, Upload);

    this.options = (0, _extend2.default)(true, {}, defaultOptions, options);

    // The storage module used to store URLs
    this._storage = this.options.urlStorage;

    // The underlying File/Blob object
    this.file = file;

    // The URL against which the file will be uploaded
    this.url = null;

    // The underlying XHR object for the current PATCH request
    this._xhr = null;

    // The fingerpinrt for the current file (set after start())
    this._fingerprint = null;

    // The offset used in the current PATCH request
    this._offset = null;

    // True if the current PATCH request has been aborted
    this._aborted = false;

    // The file's size in bytes
    this._size = null;

    // The Source object which will wrap around the given file and provides us
    // with a unified interface for getting its size and slice chunks from its
    // content allowing us to easily handle Files, Blobs, Buffers and Streams.
    this._source = null;

    // The current count of attempts which have been made. Null indicates none.
    this._retryAttempt = 0;

    // The timeout's ID which is used to delay the next retry
    this._retryTimeout = null;

    // The offset of the remote upload before the latest attempt was started.
    this._offsetBeforeRetry = 0;
  }

  _createClass(Upload, [{
    key: "start",
    value: function start() {
      var _this = this;

      var file = this.file;

      if (!file) {
        this._emitError(new Error("tus: no file or stream to upload provided"));
        return;
      }

      if (!this.options.endpoint && !this.options.uploadUrl) {
        this._emitError(new Error("tus: neither an endpoint or an upload URL is provided"));
        return;
      }

      if (this.options.resume && this._storage == null) {
        this._storage = (0, _storage.getStorage)();
      }

      if (this._source) {
        this._start(this._source);
      } else {
        var fileReader = this.options.fileReader || _source.getSource;
        fileReader(file, this.options.chunkSize, function (err, source) {
          if (err) {
            _this._emitError(err);
            return;
          }

          _this._source = source;
          _this._start(source);
        });
      }
    }
  }, {
    key: "_start",
    value: function _start(source) {
      var _this2 = this;

      var file = this.file;

      // First, we look at the uploadLengthDeferred option.
      // Next, we check if the caller has supplied a manual upload size.
      // Finally, we try to use the calculated size from the source object.
      if (this.options.uploadLengthDeferred) {
        this._size = null;
      } else if (this.options.uploadSize != null) {
        this._size = +this.options.uploadSize;
        if (isNaN(this._size)) {
          this._emitError(new Error("tus: cannot convert `uploadSize` option into a number"));
          return;
        }
      } else {
        this._size = source.size;
        if (this._size == null) {
          this._emitError(new Error("tus: cannot automatically derive upload's size from input and must be specified manually using the `uploadSize` option"));
          return;
        }
      }

      var retryDelays = this.options.retryDelays;
      if (retryDelays != null) {
        if (Object.prototype.toString.call(retryDelays) !== "[object Array]") {
          this._emitError(new Error("tus: the `retryDelays` option must either be an array or null"));
          return;
        } else {
          var errorCallback = this.options.onError;
          this.options.onError = function (err) {
            // Restore the original error callback which may have been set.
            _this2.options.onError = errorCallback;

            // We will reset the attempt counter if
            // - we were already able to connect to the server (offset != null) and
            // - we were able to upload a small chunk of data to the server
            var shouldResetDelays = _this2._offset != null && _this2._offset > _this2._offsetBeforeRetry;
            if (shouldResetDelays) {
              _this2._retryAttempt = 0;
            }

            var isOnline = true;
            if (typeof window !== "undefined" && "navigator" in window && window.navigator.onLine === false) {
              isOnline = false;
            }

            // We only attempt a retry if
            // - we didn't exceed the maxium number of retries, yet, and
            // - this error was caused by a request or it's response and
            // - the error is server error (i.e. no a status 4xx or a 409 or 423) and
            // - the browser does not indicate that we are offline
            var status = err.originalRequest ? err.originalRequest.status : 0;
            var isServerError = !inStatusCategory(status, 400) || status === 409 || status === 423;
            var shouldRetry = _this2._retryAttempt < retryDelays.length && err.originalRequest != null && isServerError && isOnline;

            if (!shouldRetry) {
              _this2._emitError(err);
              return;
            }

            var delay = retryDelays[_this2._retryAttempt++];

            _this2._offsetBeforeRetry = _this2._offset;
            _this2.options.uploadUrl = _this2.url;

            _this2._retryTimeout = setTimeout(function () {
              _this2.start();
            }, delay);
          };
        }
      }

      // Reset the aborted flag when the upload is started or else the
      // _startUpload will stop before sending a request if the upload has been
      // aborted previously.
      this._aborted = false;

      // The upload had been started previously and we should reuse this URL.
      if (this.url != null) {
        this._resumeUpload();
        return;
      }

      // A URL has manually been specified, so we try to resume
      if (this.options.uploadUrl != null) {
        this.url = this.options.uploadUrl;
        this._resumeUpload();
        return;
      }

      // Try to find the endpoint for the file in the storage
      if (this._hasStorage()) {
        this.options.fingerprint(file, this.options, function (err, fingerprintValue) {
          if (err) {
            _this2._emitError(err);
            return;
          }

          _this2._fingerprint = fingerprintValue;
          _this2._storage.getItem(_this2._fingerprint, function (err, resumedUrl) {
            if (err) {
              _this2._emitError(err);
              return;
            }

            if (resumedUrl != null) {
              _this2.url = resumedUrl;
              _this2._resumeUpload();
            } else {
              _this2._createUpload();
            }
          });
        });
      } else {
        // An upload has not started for the file yet, so we start a new one
        this._createUpload();
      }
    }
  }, {
    key: "abort",
    value: function abort(shouldTerminate, cb) {
      var _this3 = this;

      if (this._xhr !== null) {
        this._xhr.abort();
        this._source.close();
      }
      this._aborted = true;

      if (this._retryTimeout != null) {
        clearTimeout(this._retryTimeout);
        this._retryTimeout = null;
      }

      cb = cb || function () {};
      if (shouldTerminate) {
        Upload.terminate(this.url, this.options, function (err, xhr) {
          if (err) {
            return cb(err, xhr);
          }

          _this3._hasStorage() ? _this3._storage.removeItem(_this3._fingerprint, cb) : cb();
        });
      } else {
        cb();
      }
    }
  }, {
    key: "_hasStorage",
    value: function _hasStorage() {
      return this.options.resume && this._storage;
    }
  }, {
    key: "_emitXhrError",
    value: function _emitXhrError(xhr, err, causingErr) {
      this._emitError(new _error2.default(err, causingErr, xhr));
    }
  }, {
    key: "_emitError",
    value: function _emitError(err) {
      if (typeof this.options.onError === "function") {
        this.options.onError(err);
      } else {
        throw err;
      }
    }
  }, {
    key: "_emitSuccess",
    value: function _emitSuccess() {
      if (typeof this.options.onSuccess === "function") {
        this.options.onSuccess();
      }
    }

    /**
     * Publishes notification when data has been sent to the server. This
     * data may not have been accepted by the server yet.
     * @param  {number} bytesSent  Number of bytes sent to the server.
     * @param  {number} bytesTotal Total number of bytes to be sent to the server.
     */

  }, {
    key: "_emitProgress",
    value: function _emitProgress(bytesSent, bytesTotal) {
      if (typeof this.options.onProgress === "function") {
        this.options.onProgress(bytesSent, bytesTotal);
      }
    }

    /**
     * Publishes notification when a chunk of data has been sent to the server
     * and accepted by the server.
     * @param  {number} chunkSize  Size of the chunk that was accepted by the
     *                             server.
     * @param  {number} bytesAccepted Total number of bytes that have been
     *                                accepted by the server.
     * @param  {number} bytesTotal Total number of bytes to be sent to the server.
     */

  }, {
    key: "_emitChunkComplete",
    value: function _emitChunkComplete(chunkSize, bytesAccepted, bytesTotal) {
      if (typeof this.options.onChunkComplete === "function") {
        this.options.onChunkComplete(chunkSize, bytesAccepted, bytesTotal);
      }
    }

    /**
     * Set the headers used in the request and the withCredentials property
     * as defined in the options
     *
     * @param {XMLHttpRequest} xhr
     */

  }, {
    key: "_setupXHR",
    value: function _setupXHR(xhr) {
      this._xhr = xhr;
      setupXHR(xhr, this.options);
    }

    /**
     * Create a new upload using the creation extension by sending a POST
     * request to the endpoint. After successful creation the file will be
     * uploaded
     *
     * @api private
     */

  }, {
    key: "_createUpload",
    value: function _createUpload() {
      var _this4 = this;

      if (!this.options.endpoint) {
        this._emitError(new Error("tus: unable to create upload because no endpoint is provided"));
        return;
      }

      var xhr = (0, _request.newRequest)();
      xhr.open("POST", this.options.endpoint, true);

      xhr.onload = function () {
        if (!inStatusCategory(xhr.status, 200)) {
          _this4._emitXhrError(xhr, new Error("tus: unexpected response while creating upload"));
          return;
        }

        var location = xhr.getResponseHeader("Location");
        if (location == null) {
          _this4._emitXhrError(xhr, new Error("tus: invalid or missing Location header"));
          return;
        }

        _this4.url = (0, _request.resolveUrl)(_this4.options.endpoint, location);

        if (_this4._size === 0) {
          // Nothing to upload and file was successfully created
          _this4._emitSuccess();
          _this4._source.close();
          return;
        }

        if (_this4._hasStorage()) {
          _this4._storage.setItem(_this4._fingerprint, _this4.url, function (err) {
            if (err) {
              _this4._emitError(err);
            }
          });
        }

        if (_this4.options.uploadDataDuringCreation) {
          _this4._handleUploadResponse(xhr);
        } else {
          _this4._offset = 0;
          _this4._startUpload();
        }
      };

      xhr.onerror = function (err) {
        _this4._emitXhrError(xhr, new Error("tus: failed to create upload"), err);
      };

      this._setupXHR(xhr);
      if (this.options.uploadLengthDeferred) {
        xhr.setRequestHeader("Upload-Defer-Length", 1);
      } else {
        xhr.setRequestHeader("Upload-Length", this._size);
      }

      // Add metadata if values have been added
      var metadata = encodeMetadata(this.options.metadata);
      if (metadata !== "") {
        xhr.setRequestHeader("Upload-Metadata", metadata);
      }

      if (this.options.uploadDataDuringCreation && !this.options.uploadLengthDeferred) {
        this._offset = 0;
        this._addChunkToRequest(xhr);
      } else {
        xhr.send(null);
      }
    }

    /*
     * Try to resume an existing upload. First a HEAD request will be sent
     * to retrieve the offset. If the request fails a new upload will be
     * created. In the case of a successful response the file will be uploaded.
     *
     * @api private
     */

  }, {
    key: "_resumeUpload",
    value: function _resumeUpload() {
      var _this5 = this;

      var xhr = (0, _request.newRequest)();
      xhr.open("HEAD", this.url, true);

      xhr.onload = function () {
        if (!inStatusCategory(xhr.status, 200)) {
          if (_this5._hasStorage() && inStatusCategory(xhr.status, 400)) {
            // Remove stored fingerprint and corresponding endpoint,
            // on client errors since the file can not be found
            _this5._storage.removeItem(_this5._fingerprint, function (err) {
              if (err) {
                _this5._emitError(err);
              }
            });
          }

          // If the upload is locked (indicated by the 423 Locked status code), we
          // emit an error instead of directly starting a new upload. This way the
          // retry logic can catch the error and will retry the upload. An upload
          // is usually locked for a short period of time and will be available
          // afterwards.
          if (xhr.status === 423) {
            _this5._emitXhrError(xhr, new Error("tus: upload is currently locked; retry later"));
            return;
          }

          if (!_this5.options.endpoint) {
            // Don't attempt to create a new upload if no endpoint is provided.
            _this5._emitXhrError(xhr, new Error("tus: unable to resume upload (new upload cannot be created without an endpoint)"));
            return;
          }

          // Try to create a new upload
          _this5.url = null;
          _this5._createUpload();
          return;
        }

        var offset = parseInt(xhr.getResponseHeader("Upload-Offset"), 10);
        if (isNaN(offset)) {
          _this5._emitXhrError(xhr, new Error("tus: invalid or missing offset value"));
          return;
        }

        var length = parseInt(xhr.getResponseHeader("Upload-Length"), 10);
        if (isNaN(length) && !_this5.options.uploadLengthDeferred) {
          _this5._emitXhrError(xhr, new Error("tus: invalid or missing length value"));
          return;
        }

        // Upload has already been completed and we do not need to send additional
        // data to the server
        if (offset === length) {
          _this5._emitProgress(length, length);
          _this5._emitSuccess();
          return;
        }

        _this5._offset = offset;
        _this5._startUpload();
      };

      xhr.onerror = function (err) {
        _this5._emitXhrError(xhr, new Error("tus: failed to resume upload"), err);
      };

      this._setupXHR(xhr);
      xhr.send(null);
    }

    /**
     * Start uploading the file using PATCH requests. The file will be divided
     * into chunks as specified in the chunkSize option. During the upload
     * the onProgress event handler may be invoked multiple times.
     *
     * @api private
     */

  }, {
    key: "_startUpload",
    value: function _startUpload() {
      var _this6 = this;

      // If the upload has been aborted, we will not send the next PATCH request.
      // This is important if the abort method was called during a callback, such
      // as onChunkComplete or onProgress.
      if (this._aborted) {
        return;
      }

      var xhr = (0, _request.newRequest)();

      // Some browser and servers may not support the PATCH method. For those
      // cases, you can tell tus-js-client to use a POST request with the
      // X-HTTP-Method-Override header for simulating a PATCH request.
      if (this.options.overridePatchMethod) {
        xhr.open("POST", this.url, true);
        xhr.setRequestHeader("X-HTTP-Method-Override", "PATCH");
      } else {
        xhr.open("PATCH", this.url, true);
      }

      xhr.onload = function () {
        if (!inStatusCategory(xhr.status, 200)) {
          _this6._emitXhrError(xhr, new Error("tus: unexpected response while uploading chunk"));
          return;
        }

        _this6._handleUploadResponse(xhr);
      };

      xhr.onerror = function (err) {
        // Don't emit an error if the upload was aborted manually
        if (_this6._aborted) {
          return;
        }

        _this6._emitXhrError(xhr, new Error("tus: failed to upload chunk at offset " + _this6._offset), err);
      };

      this._setupXHR(xhr);

      xhr.setRequestHeader("Upload-Offset", this._offset);
      this._addChunkToRequest(xhr);
    }

    /**
     * _addChunktoRequest reads a chunk from the source and sends it using the
     * supplied XHR object. It will not handle the response.
     */

  }, {
    key: "_addChunkToRequest",
    value: function _addChunkToRequest(xhr) {
      var _this7 = this;

      // Test support for progress events before attaching an event listener
      if ("upload" in xhr) {
        xhr.upload.onprogress = function (e) {
          if (!e.lengthComputable) {
            return;
          }

          _this7._emitProgress(start + e.loaded, _this7._size);
        };
      }

      xhr.setRequestHeader("Content-Type", "application/offset+octet-stream");

      var start = this._offset;
      var end = this._offset + this.options.chunkSize;

      // The specified chunkSize may be Infinity or the calcluated end position
      // may exceed the file's size. In both cases, we limit the end position to
      // the input's total size for simpler calculations and correctness.
      if ((end === Infinity || end > this._size) && !this.options.uploadLengthDeferred) {
        end = this._size;
      }

      this._source.slice(start, end, function (err, value, complete) {
        if (err) {
          _this7._emitError(err);
          return;
        }

        if (_this7.options.uploadLengthDeferred) {
          if (complete) {
            _this7._size = _this7._offset + (value && value.size ? value.size : 0);
            xhr.setRequestHeader("Upload-Length", _this7._size);
          }
        }

        if (value === null) {
          xhr.send();
        } else {
          xhr.send(value);
          _this7._emitProgress(_this7._offset, _this7._size);
        }
      });
    }

    /**
     * _handleUploadResponse is used by requests that haven been sent using _addChunkToRequest
     * and already have received a response.
     */

  }, {
    key: "_handleUploadResponse",
    value: function _handleUploadResponse(xhr) {
      var _this8 = this;

      var offset = parseInt(xhr.getResponseHeader("Upload-Offset"), 10);
      if (isNaN(offset)) {
        this._emitXhrError(xhr, new Error("tus: invalid or missing offset value"));
        return;
      }

      this._emitProgress(offset, this._size);
      this._emitChunkComplete(offset - this._offset, offset, this._size);

      this._offset = offset;

      if (offset == this._size) {
        if (this.options.removeFingerprintOnSuccess && this.options.resume) {
          // Remove stored fingerprint and corresponding endpoint. This causes
          // new upload of the same file must be treated as a different file.
          this._storage.removeItem(this._fingerprint, function (err) {
            if (err) {
              _this8._emitError(err);
            }
          });
        }

        // Yay, finally done :)
        this._emitSuccess();
        this._source.close();
        return;
      }

      this._startUpload();
    }
  }], [{
    key: "terminate",
    value: function terminate(url, options, cb) {
      if (typeof options !== "function" && typeof cb !== "function") {
        throw new Error("tus: a callback function must be specified");
      }

      if (typeof options === "function") {
        cb = options;
        options = {};
      }

      var xhr = (0, _request.newRequest)();
      xhr.open("DELETE", url, true);

      xhr.onload = function () {
        if (xhr.status !== 204) {
          cb(new _error2.default(new Error("tus: unexpected response while terminating upload"), null, xhr));
          return;
        }

        cb();
      };

      xhr.onerror = function (err) {
        cb(new _error2.default(err, new Error("tus: failed to terminate upload"), xhr));
      };

      setupXHR(xhr, options);
      xhr.send(null);
    }
  }]);

  return Upload;
}();

function encodeMetadata(metadata) {
  var encoded = [];

  for (var key in metadata) {
    encoded.push(key + " " + _jsBase.Base64.encode(metadata[key]));
  }

  return encoded.join(",");
}

/**
 * Checks whether a given status is in the range of the expected category.
 * For example, only a status between 200 and 299 will satisfy the category 200.
 *
 * @api private
 */
function inStatusCategory(status, category) {
  return status >= category && status < category + 100;
}

function setupXHR(xhr, options) {
  xhr.setRequestHeader("Tus-Resumable", "1.0.0");
  var headers = options.headers || {};

  for (var name in headers) {
    xhr.setRequestHeader(name, headers[name]);
  }

  xhr.withCredentials = options.withCredentials;
}

Upload.defaultOptions = defaultOptions;

exports.default = Upload;

},{"./error":9,"./node/fingerprint":1,"./node/request":5,"./node/source":6,"./node/storage":7,"extend":12,"js-base64":13}],12:[function(_dereq_,module,exports){
'use strict';

var hasOwn = Object.prototype.hasOwnProperty;
var toStr = Object.prototype.toString;
var defineProperty = Object.defineProperty;
var gOPD = Object.getOwnPropertyDescriptor;

var isArray = function isArray(arr) {
	if (typeof Array.isArray === 'function') {
		return Array.isArray(arr);
	}

	return toStr.call(arr) === '[object Array]';
};

var isPlainObject = function isPlainObject(obj) {
	if (!obj || toStr.call(obj) !== '[object Object]') {
		return false;
	}

	var hasOwnConstructor = hasOwn.call(obj, 'constructor');
	var hasIsPrototypeOf = obj.constructor && obj.constructor.prototype && hasOwn.call(obj.constructor.prototype, 'isPrototypeOf');
	// Not own constructor property must be Object
	if (obj.constructor && !hasOwnConstructor && !hasIsPrototypeOf) {
		return false;
	}

	// Own properties are enumerated firstly, so to speed up,
	// if last one is own, then all properties are own.
	var key;
	for (key in obj) { /**/ }

	return typeof key === 'undefined' || hasOwn.call(obj, key);
};

// If name is '__proto__', and Object.defineProperty is available, define __proto__ as an own property on target
var setProperty = function setProperty(target, options) {
	if (defineProperty && options.name === '__proto__') {
		defineProperty(target, options.name, {
			enumerable: true,
			configurable: true,
			value: options.newValue,
			writable: true
		});
	} else {
		target[options.name] = options.newValue;
	}
};

// Return undefined instead of __proto__ if '__proto__' is not an own property
var getProperty = function getProperty(obj, name) {
	if (name === '__proto__') {
		if (!hasOwn.call(obj, name)) {
			return void 0;
		} else if (gOPD) {
			// In early versions of node, obj['__proto__'] is buggy when obj has
			// __proto__ as an own property. Object.getOwnPropertyDescriptor() works.
			return gOPD(obj, name).value;
		}
	}

	return obj[name];
};

module.exports = function extend() {
	var options, name, src, copy, copyIsArray, clone;
	var target = arguments[0];
	var i = 1;
	var length = arguments.length;
	var deep = false;

	// Handle a deep copy situation
	if (typeof target === 'boolean') {
		deep = target;
		target = arguments[1] || {};
		// skip the boolean and the target
		i = 2;
	}
	if (target == null || (typeof target !== 'object' && typeof target !== 'function')) {
		target = {};
	}

	for (; i < length; ++i) {
		options = arguments[i];
		// Only deal with non-null/undefined values
		if (options != null) {
			// Extend the base object
			for (name in options) {
				src = getProperty(target, name);
				copy = getProperty(options, name);

				// Prevent never-ending loop
				if (target !== copy) {
					// Recurse if we're merging plain objects or arrays
					if (deep && copy && (isPlainObject(copy) || (copyIsArray = isArray(copy)))) {
						if (copyIsArray) {
							copyIsArray = false;
							clone = src && isArray(src) ? src : [];
						} else {
							clone = src && isPlainObject(src) ? src : {};
						}

						// Never move original objects, clone them
						setProperty(target, { name: name, newValue: extend(deep, clone, copy) });

					// Don't bring in undefined values
					} else if (typeof copy !== 'undefined') {
						setProperty(target, { name: name, newValue: copy });
					}
				}
			}
		}
	}

	// Return the modified object
	return target;
};

},{}],13:[function(_dereq_,module,exports){
(function (global){
/*
 *  base64.js
 *
 *  Licensed under the BSD 3-Clause License.
 *    http://opensource.org/licenses/BSD-3-Clause
 *
 *  References:
 *    http://en.wikipedia.org/wiki/Base64
 */
;(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined'
        ? module.exports = factory(global)
        : typeof define === 'function' && define.amd
        ? define(factory) : factory(global)
}((
    typeof self !== 'undefined' ? self
        : typeof window !== 'undefined' ? window
        : typeof global !== 'undefined' ? global
: this
), function(global) {
    'use strict';
    // existing version for noConflict()
    var _Base64 = global.Base64;
    var version = "2.4.9";
    // if node.js and NOT React Native, we use Buffer
    var buffer;
    if (typeof module !== 'undefined' && module.exports) {
        try {
            buffer = eval("require('buffer').Buffer");
        } catch (err) {
            buffer = undefined;
        }
    }
    // constants
    var b64chars
        = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    var b64tab = function(bin) {
        var t = {};
        for (var i = 0, l = bin.length; i < l; i++) t[bin.charAt(i)] = i;
        return t;
    }(b64chars);
    var fromCharCode = String.fromCharCode;
    // encoder stuff
    var cb_utob = function(c) {
        if (c.length < 2) {
            var cc = c.charCodeAt(0);
            return cc < 0x80 ? c
                : cc < 0x800 ? (fromCharCode(0xc0 | (cc >>> 6))
                                + fromCharCode(0x80 | (cc & 0x3f)))
                : (fromCharCode(0xe0 | ((cc >>> 12) & 0x0f))
                   + fromCharCode(0x80 | ((cc >>>  6) & 0x3f))
                   + fromCharCode(0x80 | ( cc         & 0x3f)));
        } else {
            var cc = 0x10000
                + (c.charCodeAt(0) - 0xD800) * 0x400
                + (c.charCodeAt(1) - 0xDC00);
            return (fromCharCode(0xf0 | ((cc >>> 18) & 0x07))
                    + fromCharCode(0x80 | ((cc >>> 12) & 0x3f))
                    + fromCharCode(0x80 | ((cc >>>  6) & 0x3f))
                    + fromCharCode(0x80 | ( cc         & 0x3f)));
        }
    };
    var re_utob = /[\uD800-\uDBFF][\uDC00-\uDFFFF]|[^\x00-\x7F]/g;
    var utob = function(u) {
        return u.replace(re_utob, cb_utob);
    };
    var cb_encode = function(ccc) {
        var padlen = [0, 2, 1][ccc.length % 3],
        ord = ccc.charCodeAt(0) << 16
            | ((ccc.length > 1 ? ccc.charCodeAt(1) : 0) << 8)
            | ((ccc.length > 2 ? ccc.charCodeAt(2) : 0)),
        chars = [
            b64chars.charAt( ord >>> 18),
            b64chars.charAt((ord >>> 12) & 63),
            padlen >= 2 ? '=' : b64chars.charAt((ord >>> 6) & 63),
            padlen >= 1 ? '=' : b64chars.charAt(ord & 63)
        ];
        return chars.join('');
    };
    var btoa = global.btoa ? function(b) {
        return global.btoa(b);
    } : function(b) {
        return b.replace(/[\s\S]{1,3}/g, cb_encode);
    };
    var _encode = buffer ?
        buffer.from && Uint8Array && buffer.from !== Uint8Array.from
        ? function (u) {
            return (u.constructor === buffer.constructor ? u : buffer.from(u))
                .toString('base64')
        }
        :  function (u) {
            return (u.constructor === buffer.constructor ? u : new  buffer(u))
                .toString('base64')
        }
        : function (u) { return btoa(utob(u)) }
    ;
    var encode = function(u, urisafe) {
        return !urisafe
            ? _encode(String(u))
            : _encode(String(u)).replace(/[+\/]/g, function(m0) {
                return m0 == '+' ? '-' : '_';
            }).replace(/=/g, '');
    };
    var encodeURI = function(u) { return encode(u, true) };
    // decoder stuff
    var re_btou = new RegExp([
        '[\xC0-\xDF][\x80-\xBF]',
        '[\xE0-\xEF][\x80-\xBF]{2}',
        '[\xF0-\xF7][\x80-\xBF]{3}'
    ].join('|'), 'g');
    var cb_btou = function(cccc) {
        switch(cccc.length) {
        case 4:
            var cp = ((0x07 & cccc.charCodeAt(0)) << 18)
                |    ((0x3f & cccc.charCodeAt(1)) << 12)
                |    ((0x3f & cccc.charCodeAt(2)) <<  6)
                |     (0x3f & cccc.charCodeAt(3)),
            offset = cp - 0x10000;
            return (fromCharCode((offset  >>> 10) + 0xD800)
                    + fromCharCode((offset & 0x3FF) + 0xDC00));
        case 3:
            return fromCharCode(
                ((0x0f & cccc.charCodeAt(0)) << 12)
                    | ((0x3f & cccc.charCodeAt(1)) << 6)
                    |  (0x3f & cccc.charCodeAt(2))
            );
        default:
            return  fromCharCode(
                ((0x1f & cccc.charCodeAt(0)) << 6)
                    |  (0x3f & cccc.charCodeAt(1))
            );
        }
    };
    var btou = function(b) {
        return b.replace(re_btou, cb_btou);
    };
    var cb_decode = function(cccc) {
        var len = cccc.length,
        padlen = len % 4,
        n = (len > 0 ? b64tab[cccc.charAt(0)] << 18 : 0)
            | (len > 1 ? b64tab[cccc.charAt(1)] << 12 : 0)
            | (len > 2 ? b64tab[cccc.charAt(2)] <<  6 : 0)
            | (len > 3 ? b64tab[cccc.charAt(3)]       : 0),
        chars = [
            fromCharCode( n >>> 16),
            fromCharCode((n >>>  8) & 0xff),
            fromCharCode( n         & 0xff)
        ];
        chars.length -= [0, 0, 2, 1][padlen];
        return chars.join('');
    };
    var atob = global.atob ? function(a) {
        return global.atob(a);
    } : function(a){
        return a.replace(/[\s\S]{1,4}/g, cb_decode);
    };
    var _decode = buffer ?
        buffer.from && Uint8Array && buffer.from !== Uint8Array.from
        ? function(a) {
            return (a.constructor === buffer.constructor
                    ? a : buffer.from(a, 'base64')).toString();
        }
        : function(a) {
            return (a.constructor === buffer.constructor
                    ? a : new buffer(a, 'base64')).toString();
        }
        : function(a) { return btou(atob(a)) };
    var decode = function(a){
        return _decode(
            String(a).replace(/[-_]/g, function(m0) { return m0 == '-' ? '+' : '/' })
                .replace(/[^A-Za-z0-9\+\/]/g, '')
        );
    };
    var noConflict = function() {
        var Base64 = global.Base64;
        global.Base64 = _Base64;
        return Base64;
    };
    // export Base64
    global.Base64 = {
        VERSION: version,
        atob: atob,
        btoa: btoa,
        fromBase64: decode,
        toBase64: encode,
        utob: utob,
        encode: encode,
        encodeURI: encodeURI,
        btou: btou,
        decode: decode,
        noConflict: noConflict,
        __buffer__: buffer
    };
    // if ES5 is available, make Base64.extendString() available
    if (typeof Object.defineProperty === 'function') {
        var noEnum = function(v){
            return {value:v,enumerable:false,writable:true,configurable:true};
        };
        global.Base64.extendString = function () {
            Object.defineProperty(
                String.prototype, 'fromBase64', noEnum(function () {
                    return decode(this)
                }));
            Object.defineProperty(
                String.prototype, 'toBase64', noEnum(function (urisafe) {
                    return encode(this, urisafe)
                }));
            Object.defineProperty(
                String.prototype, 'toBase64URI', noEnum(function () {
                    return encode(this, true)
                }));
        };
    }
    //
    // export Base64 to the namespace
    //
    if (global['Meteor']) { // Meteor.js
        Base64 = global.Base64;
    }
    // module.exports and AMD are mutually exclusive.
    // module.exports has precedence.
    if (typeof module !== 'undefined' && module.exports) {
        module.exports.Base64 = global.Base64;
    }
    else if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        define([], function(){ return global.Base64 });
    }
    // that's it!
    return {Base64: global.Base64}
}));

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{}],14:[function(_dereq_,module,exports){
'use strict';

var has = Object.prototype.hasOwnProperty;

/**
 * Decode a URI encoded string.
 *
 * @param {String} input The URI encoded string.
 * @returns {String} The decoded string.
 * @api private
 */
function decode(input) {
  return decodeURIComponent(input.replace(/\+/g, ' '));
}

/**
 * Simple query string parser.
 *
 * @param {String} query The query string that needs to be parsed.
 * @returns {Object}
 * @api public
 */
function querystring(query) {
  var parser = /([^=?&]+)=?([^&]*)/g
    , result = {}
    , part;

  while (part = parser.exec(query)) {
    var key = decode(part[1])
      , value = decode(part[2]);

    //
    // Prevent overriding of existing properties. This ensures that build-in
    // methods like `toString` or __proto__ are not overriden by malicious
    // querystrings.
    //
    if (key in result) continue;
    result[key] = value;
  }

  return result;
}

/**
 * Transform a query string to an object.
 *
 * @param {Object} obj Object that should be transformed.
 * @param {String} prefix Optional prefix.
 * @returns {String}
 * @api public
 */
function querystringify(obj, prefix) {
  prefix = prefix || '';

  var pairs = [];

  //
  // Optionally prefix with a '?' if needed
  //
  if ('string' !== typeof prefix) prefix = '?';

  for (var key in obj) {
    if (has.call(obj, key)) {
      pairs.push(encodeURIComponent(key) +'='+ encodeURIComponent(obj[key]));
    }
  }

  return pairs.length ? prefix + pairs.join('&') : '';
}

//
// Expose the module.
//
exports.stringify = querystringify;
exports.parse = querystring;

},{}],15:[function(_dereq_,module,exports){
'use strict';

/**
 * Check if we're required to add a port number.
 *
 * @see https://url.spec.whatwg.org/#default-port
 * @param {Number|String} port Port number we need to check
 * @param {String} protocol Protocol we need to check against.
 * @returns {Boolean} Is it a default port for the given protocol
 * @api private
 */
module.exports = function required(port, protocol) {
  protocol = protocol.split(':')[0];
  port = +port;

  if (!port) return false;

  switch (protocol) {
    case 'http':
    case 'ws':
    return port !== 80;

    case 'https':
    case 'wss':
    return port !== 443;

    case 'ftp':
    return port !== 21;

    case 'gopher':
    return port !== 70;

    case 'file':
    return false;
  }

  return port !== 0;
};

},{}],16:[function(_dereq_,module,exports){
(function (global){
'use strict';

var required = _dereq_('requires-port')
  , qs = _dereq_('querystringify')
  , protocolre = /^([a-z][a-z0-9.+-]*:)?(\/\/)?([\S\s]*)/i
  , slashes = /^[A-Za-z][A-Za-z0-9+-.]*:\/\//;

/**
 * These are the parse rules for the URL parser, it informs the parser
 * about:
 *
 * 0. The char it Needs to parse, if it's a string it should be done using
 *    indexOf, RegExp using exec and NaN means set as current value.
 * 1. The property we should set when parsing this value.
 * 2. Indication if it's backwards or forward parsing, when set as number it's
 *    the value of extra chars that should be split off.
 * 3. Inherit from location if non existing in the parser.
 * 4. `toLowerCase` the resulting value.
 */
var rules = [
  ['#', 'hash'],                        // Extract from the back.
  ['?', 'query'],                       // Extract from the back.
  function sanitize(address) {          // Sanitize what is left of the address
    return address.replace('\\', '/');
  },
  ['/', 'pathname'],                    // Extract from the back.
  ['@', 'auth', 1],                     // Extract from the front.
  [NaN, 'host', undefined, 1, 1],       // Set left over value.
  [/:(\d+)$/, 'port', undefined, 1],    // RegExp the back.
  [NaN, 'hostname', undefined, 1, 1]    // Set left over.
];

/**
 * These properties should not be copied or inherited from. This is only needed
 * for all non blob URL's as a blob URL does not include a hash, only the
 * origin.
 *
 * @type {Object}
 * @private
 */
var ignore = { hash: 1, query: 1 };

/**
 * The location object differs when your code is loaded through a normal page,
 * Worker or through a worker using a blob. And with the blobble begins the
 * trouble as the location object will contain the URL of the blob, not the
 * location of the page where our code is loaded in. The actual origin is
 * encoded in the `pathname` so we can thankfully generate a good "default"
 * location from it so we can generate proper relative URL's again.
 *
 * @param {Object|String} loc Optional default location object.
 * @returns {Object} lolcation object.
 * @public
 */
function lolcation(loc) {
  var location = global && global.location || {};
  loc = loc || location;

  var finaldestination = {}
    , type = typeof loc
    , key;

  if ('blob:' === loc.protocol) {
    finaldestination = new Url(unescape(loc.pathname), {});
  } else if ('string' === type) {
    finaldestination = new Url(loc, {});
    for (key in ignore) delete finaldestination[key];
  } else if ('object' === type) {
    for (key in loc) {
      if (key in ignore) continue;
      finaldestination[key] = loc[key];
    }

    if (finaldestination.slashes === undefined) {
      finaldestination.slashes = slashes.test(loc.href);
    }
  }

  return finaldestination;
}

/**
 * @typedef ProtocolExtract
 * @type Object
 * @property {String} protocol Protocol matched in the URL, in lowercase.
 * @property {Boolean} slashes `true` if protocol is followed by "//", else `false`.
 * @property {String} rest Rest of the URL that is not part of the protocol.
 */

/**
 * Extract protocol information from a URL with/without double slash ("//").
 *
 * @param {String} address URL we want to extract from.
 * @return {ProtocolExtract} Extracted information.
 * @private
 */
function extractProtocol(address) {
  var match = protocolre.exec(address);

  return {
    protocol: match[1] ? match[1].toLowerCase() : '',
    slashes: !!match[2],
    rest: match[3]
  };
}

/**
 * Resolve a relative URL pathname against a base URL pathname.
 *
 * @param {String} relative Pathname of the relative URL.
 * @param {String} base Pathname of the base URL.
 * @return {String} Resolved pathname.
 * @private
 */
function resolve(relative, base) {
  var path = (base || '/').split('/').slice(0, -1).concat(relative.split('/'))
    , i = path.length
    , last = path[i - 1]
    , unshift = false
    , up = 0;

  while (i--) {
    if (path[i] === '.') {
      path.splice(i, 1);
    } else if (path[i] === '..') {
      path.splice(i, 1);
      up++;
    } else if (up) {
      if (i === 0) unshift = true;
      path.splice(i, 1);
      up--;
    }
  }

  if (unshift) path.unshift('');
  if (last === '.' || last === '..') path.push('');

  return path.join('/');
}

/**
 * The actual URL instance. Instead of returning an object we've opted-in to
 * create an actual constructor as it's much more memory efficient and
 * faster and it pleases my OCD.
 *
 * It is worth noting that we should not use `URL` as class name to prevent
 * clashes with the global URL instance that got introduced in browsers.
 *
 * @constructor
 * @param {String} address URL we want to parse.
 * @param {Object|String} location Location defaults for relative paths.
 * @param {Boolean|Function} parser Parser for the query string.
 * @private
 */
function Url(address, location, parser) {
  if (!(this instanceof Url)) {
    return new Url(address, location, parser);
  }

  var relative, extracted, parse, instruction, index, key
    , instructions = rules.slice()
    , type = typeof location
    , url = this
    , i = 0;

  //
  // The following if statements allows this module two have compatibility with
  // 2 different API:
  //
  // 1. Node.js's `url.parse` api which accepts a URL, boolean as arguments
  //    where the boolean indicates that the query string should also be parsed.
  //
  // 2. The `URL` interface of the browser which accepts a URL, object as
  //    arguments. The supplied object will be used as default values / fall-back
  //    for relative paths.
  //
  if ('object' !== type && 'string' !== type) {
    parser = location;
    location = null;
  }

  if (parser && 'function' !== typeof parser) parser = qs.parse;

  location = lolcation(location);

  //
  // Extract protocol information before running the instructions.
  //
  extracted = extractProtocol(address || '');
  relative = !extracted.protocol && !extracted.slashes;
  url.slashes = extracted.slashes || relative && location.slashes;
  url.protocol = extracted.protocol || location.protocol || '';
  address = extracted.rest;

  //
  // When the authority component is absent the URL starts with a path
  // component.
  //
  if (!extracted.slashes) instructions[3] = [/(.*)/, 'pathname'];

  for (; i < instructions.length; i++) {
    instruction = instructions[i];

    if (typeof instruction === 'function') {
      address = instruction(address);
      continue;
    }

    parse = instruction[0];
    key = instruction[1];

    if (parse !== parse) {
      url[key] = address;
    } else if ('string' === typeof parse) {
      if (~(index = address.indexOf(parse))) {
        if ('number' === typeof instruction[2]) {
          url[key] = address.slice(0, index);
          address = address.slice(index + instruction[2]);
        } else {
          url[key] = address.slice(index);
          address = address.slice(0, index);
        }
      }
    } else if ((index = parse.exec(address))) {
      url[key] = index[1];
      address = address.slice(0, index.index);
    }

    url[key] = url[key] || (
      relative && instruction[3] ? location[key] || '' : ''
    );

    //
    // Hostname, host and protocol should be lowercased so they can be used to
    // create a proper `origin`.
    //
    if (instruction[4]) url[key] = url[key].toLowerCase();
  }

  //
  // Also parse the supplied query string in to an object. If we're supplied
  // with a custom parser as function use that instead of the default build-in
  // parser.
  //
  if (parser) url.query = parser(url.query);

  //
  // If the URL is relative, resolve the pathname against the base URL.
  //
  if (
      relative
    && location.slashes
    && url.pathname.charAt(0) !== '/'
    && (url.pathname !== '' || location.pathname !== '')
  ) {
    url.pathname = resolve(url.pathname, location.pathname);
  }

  //
  // We should not add port numbers if they are already the default port number
  // for a given protocol. As the host also contains the port number we're going
  // override it with the hostname which contains no port number.
  //
  if (!required(url.port, url.protocol)) {
    url.host = url.hostname;
    url.port = '';
  }

  //
  // Parse down the `auth` for the username and password.
  //
  url.username = url.password = '';
  if (url.auth) {
    instruction = url.auth.split(':');
    url.username = instruction[0] || '';
    url.password = instruction[1] || '';
  }

  url.origin = url.protocol && url.host && url.protocol !== 'file:'
    ? url.protocol +'//'+ url.host
    : 'null';

  //
  // The href is just the compiled result.
  //
  url.href = url.toString();
}

/**
 * This is convenience method for changing properties in the URL instance to
 * insure that they all propagate correctly.
 *
 * @param {String} part          Property we need to adjust.
 * @param {Mixed} value          The newly assigned value.
 * @param {Boolean|Function} fn  When setting the query, it will be the function
 *                               used to parse the query.
 *                               When setting the protocol, double slash will be
 *                               removed from the final url if it is true.
 * @returns {URL} URL instance for chaining.
 * @public
 */
function set(part, value, fn) {
  var url = this;

  switch (part) {
    case 'query':
      if ('string' === typeof value && value.length) {
        value = (fn || qs.parse)(value);
      }

      url[part] = value;
      break;

    case 'port':
      url[part] = value;

      if (!required(value, url.protocol)) {
        url.host = url.hostname;
        url[part] = '';
      } else if (value) {
        url.host = url.hostname +':'+ value;
      }

      break;

    case 'hostname':
      url[part] = value;

      if (url.port) value += ':'+ url.port;
      url.host = value;
      break;

    case 'host':
      url[part] = value;

      if (/:\d+$/.test(value)) {
        value = value.split(':');
        url.port = value.pop();
        url.hostname = value.join(':');
      } else {
        url.hostname = value;
        url.port = '';
      }

      break;

    case 'protocol':
      url.protocol = value.toLowerCase();
      url.slashes = !fn;
      break;

    case 'pathname':
    case 'hash':
      if (value) {
        var char = part === 'pathname' ? '/' : '#';
        url[part] = value.charAt(0) !== char ? char + value : value;
      } else {
        url[part] = value;
      }
      break;

    default:
      url[part] = value;
  }

  for (var i = 0; i < rules.length; i++) {
    var ins = rules[i];

    if (ins[4]) url[ins[1]] = url[ins[1]].toLowerCase();
  }

  url.origin = url.protocol && url.host && url.protocol !== 'file:'
    ? url.protocol +'//'+ url.host
    : 'null';

  url.href = url.toString();

  return url;
}

/**
 * Transform the properties back in to a valid and full URL string.
 *
 * @param {Function} stringify Optional query stringify function.
 * @returns {String} Compiled version of the URL.
 * @public
 */
function toString(stringify) {
  if (!stringify || 'function' !== typeof stringify) stringify = qs.stringify;

  var query
    , url = this
    , protocol = url.protocol;

  if (protocol && protocol.charAt(protocol.length - 1) !== ':') protocol += ':';

  var result = protocol + (url.slashes ? '//' : '');

  if (url.username) {
    result += url.username;
    if (url.password) result += ':'+ url.password;
    result += '@';
  }

  result += url.host + url.pathname;

  query = 'object' === typeof url.query ? stringify(url.query) : url.query;
  if (query) result += '?' !== query.charAt(0) ? '?'+ query : query;

  if (url.hash) result += url.hash;

  return result;
}

Url.prototype = { set: set, toString: toString };

//
// Expose the URL parser and some additional properties that might be useful for
// others or testing.
//
Url.extractProtocol = extractProtocol;
Url.location = lolcation;
Url.qs = qs;

module.exports = Url;

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{"querystringify":14,"requires-port":15}]},{},[10])(10)
});
//# sourceMappingURL=tus.js.map
