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Editing File: /usr/share/nodejs/node-fetch/lib/index.es.js

process.emitWarning("The .es.js file is deprecated. Use .mjs instead.");

import Url from 'url';
import http from 'http';
import https from 'https';
import zlib from 'zlib';
import Stream from 'stream';
import whatwgUrl from 'whatwg-url';

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);
  }
}

function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
  if (staticProps) _defineProperties(Constructor, staticProps);
  Object.defineProperty(Constructor, "prototype", {
    writable: false
  });
  return Constructor;
}

function _unsupportedIterableToArray(o, minLen) {
  if (!o) return;
  if (typeof o === "string") return _arrayLikeToArray(o, minLen);
  var n = Object.prototype.toString.call(o).slice(8, -1);
  if (n === "Object" && o.constructor) n = o.constructor.name;
  if (n === "Map" || n === "Set") return Array.from(o);
  if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
}

function _arrayLikeToArray(arr, len) {
  if (len == null || len > arr.length) len = arr.length;

for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];

return arr2;
}

function _createForOfIteratorHelperLoose(o, allowArrayLike) {
  var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
  if (it) return (it = it.call(o)).next.bind(it);

if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
    if (it) o = it;
    var i = 0;
    return function () {
      if (i >= o.length) return {
        done: true
      };
      return {
        done: false,
        value: o[i++]
      };
    };
  }

throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}

var Readable = Stream.Readable;
var BUFFER = Symbol('buffer');
var TYPE = Symbol('type');

var Blob = /*#__PURE__*/function () {
  function Blob() {
    this[TYPE] = '';
    var blobParts = arguments[0];
    var options = arguments[1];
    var buffers = [];
    var size = 0;

if (blobParts) {
      var a = blobParts;
      var length = Number(a.length);

for (var i = 0; i < length; i++) {
        var element = a[i];
        var buffer = void 0;

if (element instanceof Buffer) {
          buffer = element;
        } else if (ArrayBuffer.isView(element)) {
          buffer = Buffer.from(element.buffer, element.byteOffset, element.byteLength);
        } else if (element instanceof ArrayBuffer) {
          buffer = Buffer.from(element);
        } else if (element instanceof Blob) {
          buffer = element[BUFFER];
        } else {
          buffer = Buffer.from(typeof element === 'string' ? element : String(element));
        }

size += buffer.length;
        buffers.push(buffer);
      }
    }

this[BUFFER] = Buffer.concat(buffers);
    var type = options && options.type !== undefined && String(options.type).toLowerCase();

if (type && !/[^\u0020-\u007E]/.test(type)) {
      this[TYPE] = type;
    }
  }

var _proto = Blob.prototype;

_proto.text = function text() {
    return Promise.resolve(this[BUFFER].toString());
  };

_proto.arrayBuffer = function arrayBuffer() {
    var buf = this[BUFFER];
    var ab = buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
    return Promise.resolve(ab);
  };

_proto.stream = function stream() {
    var readable = new Readable();

readable._read = function () {};

readable.push(this[BUFFER]);
    readable.push(null);
    return readable;
  };

_proto.toString = function toString() {
    return '[object Blob]';
  };

_proto.slice = function slice() {
    var size = this.size;
    var start = arguments[0];
    var end = arguments[1];
    var relativeStart, relativeEnd;

if (start === undefined) {
      relativeStart = 0;
    } else if (start < 0) {
      relativeStart = Math.max(size + start, 0);
    } else {
      relativeStart = Math.min(start, size);
    }

if (end === undefined) {
      relativeEnd = size;
    } else if (end < 0) {
      relativeEnd = Math.max(size + end, 0);
    } else {
      relativeEnd = Math.min(end, size);
    }

var span = Math.max(relativeEnd - relativeStart, 0);
    var buffer = this[BUFFER];
    var slicedBuffer = buffer.slice(relativeStart, relativeStart + span);
    var blob = new Blob([], {
      type: arguments[2]
    });
    blob[BUFFER] = slicedBuffer;
    return blob;
  };

_createClass(Blob, [{
    key: "size",
    get: function get() {
      return this[BUFFER].length;
    }
  }, {
    key: "type",
    get: function get() {
      return this[TYPE];
    }
  }]);

return Blob;
}();
Object.defineProperties(Blob.prototype, {
  size: {
    enumerable: true
  },
  type: {
    enumerable: true
  },
  slice: {
    enumerable: true
  }
});
Object.defineProperty(Blob.prototype, Symbol.toStringTag, {
  value: 'Blob',
  writable: false,
  enumerable: false,
  configurable: true
});

/**
 * fetch-error.js
 *
 * FetchError interface for operational errors
 */

/**
 * Create FetchError instance
 *
 * @param   String      message      Error message for human
 * @param   String      type         Error type for machine
 * @param   String      systemError  For Node.js system error
 * @return  FetchError
 */
function FetchError(message, type, systemError) {
  Error.call(this, message);
  this.message = message;
  this.type = type; // when err.type is `system`, err.code contains system error code

if (systemError) {
    this.code = this.errno = systemError.code;
  } // hide custom error implementation details from end-users

Error.captureStackTrace(this, this.constructor);
}
FetchError.prototype = Object.create(Error.prototype);
FetchError.prototype.constructor = FetchError;
FetchError.prototype.name = 'FetchError';

var convert;

try {
  convert = require('encoding').convert;
} catch (e) {}

var INTERNALS$2 = Symbol('Body internals'); // fix an issue where "PassThrough" isn't a named export for node <10

var PassThrough$1 = Stream.PassThrough;
/**
 * Body mixin
 *
 * Ref: https://fetch.spec.whatwg.org/#body
 *
 * @param   Stream  body  Readable stream
 * @param   Object  opts  Response options
 * @return  Void
 */

function Body(body, _temp) {
  var _this = this;

var _ref = _temp === void 0 ? {} : _temp,
      _ref$size = _ref.size,
      size = _ref$size === void 0 ? 0 : _ref$size,
      _ref$timeout = _ref.timeout,
      timeout = _ref$timeout === void 0 ? 0 : _ref$timeout;

if (body == null) {
    // body is undefined or null
    body = null;
  } else if (isURLSearchParams(body)) {
    // body is a URLSearchParams
    body = Buffer.from(body.toString());
  } else if (isBlob(body)) ; else if (Buffer.isBuffer(body)) ; else if (Object.prototype.toString.call(body) === '[object ArrayBuffer]') {
    // body is ArrayBuffer
    body = Buffer.from(body);
  } else if (ArrayBuffer.isView(body)) {
    // body is ArrayBufferView
    body = Buffer.from(body.buffer, body.byteOffset, body.byteLength);
  } else if (body instanceof Stream) ; else {
    // none of the above
    // coerce to string then buffer
    body = Buffer.from(String(body));
  }

this[INTERNALS$2] = {
    body,
    disturbed: false,
    error: null
  };
  this.size = size;
  this.timeout = timeout;

if (body instanceof Stream) {
    body.on('error', function (err) {
      var error = err.name === 'AbortError' ? err : new FetchError(`Invalid response body while trying to fetch ${_this.url}: ${err.message}`, 'system', err);
      _this[INTERNALS$2].error = error;
    });
  }
}
Body.prototype = {
  get body() {
    return this[INTERNALS$2].body;
  },

get bodyUsed() {
    return this[INTERNALS$2].disturbed;
  },

/**
   * Decode response as ArrayBuffer
   *
   * @return  Promise
   */
  arrayBuffer() {
    return consumeBody.call(this).then(function (buf) {
      return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
    });
  },

/**
   * Return raw response as Blob
   *
   * @return Promise
   */
  blob() {
    var ct = this.headers && this.headers.get('content-type') || '';
    return consumeBody.call(this).then(function (buf) {
      return Object.assign( // Prevent copying
      new Blob([], {
        type: ct.toLowerCase()
      }), {
        [BUFFER]: buf
      });
    });
  },

/**
   * Decode response as json
   *
   * @return  Promise
   */
  json() {
    var _this2 = this;

return consumeBody.call(this).then(function (buffer) {
      try {
        return JSON.parse(buffer.toString());
      } catch (err) {
        return Body.Promise.reject(new FetchError(`invalid json response body at ${_this2.url} reason: ${err.message}`, 'invalid-json'));
      }
    });
  },

/**
   * Decode response as text
   *
   * @return  Promise
   */
  text() {
    return consumeBody.call(this).then(function (buffer) {
      return buffer.toString();
    });
  },

/**
   * Decode response as buffer (non-spec api)
   *
   * @return  Promise
   */
  buffer() {
    return consumeBody.call(this);
  },

/**
   * Decode response as text, while automatically detecting the encoding and
   * trying to decode to UTF-8 (non-spec api)
   *
   * @return  Promise
   */
  textConverted() {
    var _this3 = this;

return consumeBody.call(this).then(function (buffer) {
      return convertBody(buffer, _this3.headers);
    });
  }

}; // In browsers, all properties are enumerable.

Object.defineProperties(Body.prototype, {
  body: {
    enumerable: true
  },
  bodyUsed: {
    enumerable: true
  },
  arrayBuffer: {
    enumerable: true
  },
  blob: {
    enumerable: true
  },
  json: {
    enumerable: true
  },
  text: {
    enumerable: true
  }
});

Body.mixIn = function (proto) {
  for (var _iterator = _createForOfIteratorHelperLoose(Object.getOwnPropertyNames(Body.prototype)), _step; !(_step = _iterator()).done;) {
    var name = _step.value;

// istanbul ignore else: future proof
    if (!(name in proto)) {
      var desc = Object.getOwnPropertyDescriptor(Body.prototype, name);
      Object.defineProperty(proto, name, desc);
    }
  }
};
/**
 * Consume and convert an entire Body to a Buffer.
 *
 * Ref: https://fetch.spec.whatwg.org/#concept-body-consume-body
 *
 * @return  Promise
 */

function consumeBody() {
  var _this4 = this;

if (this[INTERNALS$2].disturbed) {
    return Body.Promise.reject(new TypeError(`body used already for: ${this.url}`));
  }

this[INTERNALS$2].disturbed = true;

if (this[INTERNALS$2].error) {
    return Body.Promise.reject(this[INTERNALS$2].error);
  }

var body = this.body; // body is null

if (body === null) {
    return Body.Promise.resolve(Buffer.alloc(0));
  } // body is blob

if (isBlob(body)) {
    body = body.stream();
  } // body is buffer

if (Buffer.isBuffer(body)) {
    return Body.Promise.resolve(body);
  } // istanbul ignore if: should never happen

if (!(body instanceof Stream)) {
    return Body.Promise.resolve(Buffer.alloc(0));
  } // body is stream
  // get ready to actually consume the body

var accum = [];
  var accumBytes = 0;
  var abort = false;
  return new Body.Promise(function (resolve, reject) {
    var resTimeout; // allow timeout on slow response body

if (_this4.timeout) {
      resTimeout = setTimeout(function () {
        abort = true;
        reject(new FetchError(`Response timeout while trying to fetch ${_this4.url} (over ${_this4.timeout}ms)`, 'body-timeout'));
      }, _this4.timeout);
    } // handle stream errors

body.on('error', function (err) {
      if (err.name === 'AbortError') {
        // if the request was aborted, reject with this Error
        abort = true;
        reject(err);
      } else {
        // other errors, such as incorrect content-encoding
        reject(new FetchError(`Invalid response body while trying to fetch ${_this4.url}: ${err.message}`, 'system', err));
      }
    });
    body.on('data', function (chunk) {
      if (abort || chunk === null) {
        return;
      }

if (_this4.size && accumBytes + chunk.length > _this4.size) {
        abort = true;
        reject(new FetchError(`content size at ${_this4.url} over limit: ${_this4.size}`, 'max-size'));
        return;
      }

accumBytes += chunk.length;
      accum.push(chunk);
    });
    body.on('end', function () {
      if (abort) {
        return;
      }

clearTimeout(resTimeout);

try {
        resolve(Buffer.concat(accum, accumBytes));
      } catch (err) {
        // handle streams that have accumulated too much data (issue #414)
        reject(new FetchError(`Could not create Buffer from response body for ${_this4.url}: ${err.message}`, 'system', err));
      }
    });
  });
}
/**
 * Detect buffer encoding and convert to target encoding
 * ref: http://www.w3.org/TR/2011/WD-html5-20110113/parsing.html#determining-the-character-encoding
 *
 * @param   Buffer  buffer    Incoming buffer
 * @param   String  encoding  Target encoding
 * @return  String
 */

function convertBody(buffer, headers) {
  if (typeof convert !== 'function') {
    throw new Error('The package `encoding` must be installed to use the textConverted() function');
  }

var ct = headers.get('content-type');
  var charset = 'utf-8';
  var res, str; // header

if (ct) {
    res = /charset=([^;]*)/i.exec(ct);
  } // no charset in content type, peek at response body for at most 1024 bytes

str = buffer.slice(0, 1024).toString(); // html5

if (!res && str) {
    res = /<meta.+?charset=(['"])(.+?)\1/i.exec(str);
  } // html4

if (!res && str) {
    res = /<meta[\s]+?http-equiv=(['"])content-type\1[\s]+?content=(['"])(.+?)\2/i.exec(str);

if (!res) {
      res = /<meta[\s]+?content=(['"])(.+?)\1[\s]+?http-equiv=(['"])content-type\3/i.exec(str);

if (res) {
        res.pop(); // drop last quote
      }
    }

if (res) {
      res = /charset=(.*)/i.exec(res.pop());
    }
  } // xml

if (!res && str) {
    res = /<\?xml.+?encoding=(['"])(.+?)\1/i.exec(str);
  } // found charset

if (res) {
    charset = res.pop(); // prevent decode issues when sites use incorrect encoding
    // ref: https://hsivonen.fi/encoding-menu/

if (charset === 'gb2312' || charset === 'gbk') {
      charset = 'gb18030';
    }
  } // turn raw buffers into a single utf-8 buffer

return convert(buffer, 'UTF-8', charset).toString();
}
/**
 * Detect a URLSearchParams object
 * ref: https://github.com/bitinn/node-fetch/issues/296#issuecomment-307598143
 *
 * @param   Object  obj     Object to detect by type or brand
 * @return  String
 */

function isURLSearchParams(obj) {
  // Duck-typing as a necessary condition.
  if (typeof obj !== 'object' || typeof obj.append !== 'function' || typeof obj.delete !== 'function' || typeof obj.get !== 'function' || typeof obj.getAll !== 'function' || typeof obj.has !== 'function' || typeof obj.set !== 'function') {
    return false;
  } // Brand-checking and more duck-typing as optional condition.

return obj.constructor.name === 'URLSearchParams' || Object.prototype.toString.call(obj) === '[object URLSearchParams]' || typeof obj.sort === 'function';
}
/**
 * Check if `obj` is a W3C `Blob` object (which `File` inherits from)
 * @param  {*} obj
 * @return {boolean}
 */

function isBlob(obj) {
  return typeof obj === 'object' && typeof obj.arrayBuffer === 'function' && typeof obj.type === 'string' && typeof obj.stream === 'function' && typeof obj.constructor === 'function' && typeof obj.constructor.name === 'string' && /^(Blob|File)$/.test(obj.constructor.name) && /^(Blob|File)$/.test(obj[Symbol.toStringTag]);
}
/**
 * Clone body given Res/Req instance
 *
 * @param   Mixed  instance  Response or Request instance
 * @return  Mixed
 */

function clone(instance) {
  var p1, p2;
  var body = instance.body; // don't allow cloning a used body

if (instance.bodyUsed) {
    throw new Error('cannot clone body after it is used');
  } // check that body is a stream and not form-data object
  // note: we can't clone the form-data object without having it as a dependency

if (body instanceof Stream && typeof body.getBoundary !== 'function') {
    // tee instance body
    p1 = new PassThrough$1();
    p2 = new PassThrough$1();
    body.pipe(p1);
    body.pipe(p2); // set instance body to teed body and return the other teed body

instance[INTERNALS$2].body = p1;
    body = p2;
  }

return body;
}
/**
 * Performs the operation "extract a `Content-Type` value from |object|" as
 * specified in the specification:
 * https://fetch.spec.whatwg.org/#concept-bodyinit-extract
 *
 * This function assumes that instance.body is present.
 *
 * @param   Mixed  instance  Any options.body input
 */

function getTotalBytes(instance) {
  var body = instance.body;

if (body === null) {
    // body is null
    return 0;
  } else if (isBlob(body)) {
    return body.size;
  } else if (Buffer.isBuffer(body)) {
    // body is buffer
    return body.length;
  } else if (body && typeof body.getLengthSync === 'function') {
    // detect form data input from form-data module
    if (body._lengthRetrievers && body._lengthRetrievers.length == 0 || // 1.x
    body.hasKnownLength && body.hasKnownLength()) {
      // 2.x
      return body.getLengthSync();
    }

return null;
  } else {
    // body is stream
    return null;
  }
}
/**
 * Write a Body to a Node.js WritableStream (e.g. http.Request) object.
 *
 * @param   Body    instance   Instance of Body
 * @return  Void
 */

function writeToStream(dest, instance) {
  var body = instance.body;

if (body === null) {
    // body is null
    dest.end();
  } else if (isBlob(body)) {
    body.stream().pipe(dest);
  } else if (Buffer.isBuffer(body)) {
    // body is buffer
    dest.write(body);
    dest.end();
  } else {
    // body is stream
    body.pipe(dest);
  }
} // expose Promise

Body.Promise = global.Promise;

/**
 * headers.js
 *
 * Headers class offers convenient helpers
 */
var invalidTokenRegex = /[^\^_`a-zA-Z\-0-9!#$%&'*+.|~]/;
var invalidHeaderCharRegex = /[^\t\x20-\x7e\x80-\xff]/;

function validateName(name) {
  name = `${name}`;

if (invalidTokenRegex.test(name) || name === '') {
    throw new TypeError(`${name} is not a legal HTTP header name`);
  }
}

function validateValue(value) {
  value = `${value}`;

if (invalidHeaderCharRegex.test(value)) {
    throw new TypeError(`${value} is not a legal HTTP header value`);
  }
}
/**
 * Find the key in the map object given a header name.
 *
 * Returns undefined if not found.
 *
 * @param   String  name  Header name
 * @return  String|Undefined
 */

function find(map, name) {
  name = name.toLowerCase();

for (var key in map) {
    if (key.toLowerCase() === name) {
      return key;
    }
  }

return undefined;
}

var MAP = Symbol('map');

var Headers = /*#__PURE__*/function (_Symbol$iterator) {
  /**
   * Headers class
   *
   * @param   Object  headers  Response headers
   * @return  Void
   */
  function Headers(init) {
    if (init === void 0) {
      init = undefined;
    }

this[MAP] = Object.create(null);

if (init instanceof Headers) {
      var rawHeaders = init.raw();
      var headerNames = Object.keys(rawHeaders);

for (var _i = 0, _headerNames = headerNames; _i < _headerNames.length; _i++) {
        var headerName = _headerNames[_i];

for (var _iterator = _createForOfIteratorHelperLoose(rawHeaders[headerName]), _step; !(_step = _iterator()).done;) {
          var value = _step.value;
          this.append(headerName, value);
        }
      }

return;
    } // We don't worry about converting prop to ByteString here as append()
    // will handle it.

if (init == null) ; else if (typeof init === 'object') {
      var method = init[Symbol.iterator];

if (method != null) {
        if (typeof method !== 'function') {
          throw new TypeError('Header pairs must be iterable');
        } // sequence<sequence<ByteString>>
        // Note: per spec we have to first exhaust the lists then process them

var pairs = [];

for (var _iterator2 = _createForOfIteratorHelperLoose(init), _step2; !(_step2 = _iterator2()).done;) {
          var _pair = _step2.value;

if (typeof _pair !== 'object' || typeof _pair[Symbol.iterator] !== 'function') {
            throw new TypeError('Each header pair must be iterable');
          }

pairs.push(Array.from(_pair));
        }

for (var _i2 = 0, _pairs = pairs; _i2 < _pairs.length; _i2++) {
          var pair = _pairs[_i2];

if (pair.length !== 2) {
            throw new TypeError('Each header pair must be a name/value tuple');
          }

this.append(pair[0], pair[1]);
        }
      } else {
        // record<ByteString, ByteString>
        for (var _i3 = 0, _Object$keys = Object.keys(init); _i3 < _Object$keys.length; _i3++) {
          var key = _Object$keys[_i3];
          var _value = init[key];
          this.append(key, _value);
        }
      }
    } else {
      throw new TypeError('Provided initializer must be an object');
    }
  }
  /**
   * Return combined header value given name
   *
   * @param   String  name  Header name
   * @return  Mixed
   */

var _proto = Headers.prototype;

_proto.get = function get(name) {
    name = `${name}`;
    validateName(name);
    var key = find(this[MAP], name);

if (key === undefined) {
      return null;
    }

return this[MAP][key].join(', ');
  }
  /**
   * Iterate over all headers
   *
   * @param   Function  callback  Executed for each item with parameters (value, name, thisArg)
   * @param   Boolean   thisArg   `this` context for callback function
   * @return  Void
   */
  ;

_proto.forEach = function forEach(callback, thisArg) {
    if (thisArg === void 0) {
      thisArg = undefined;
    }

var pairs = getHeaders(this);
    var i = 0;

while (i < pairs.length) {
      var _pairs$i = pairs[i],
          name = _pairs$i[0],
          value = _pairs$i[1];
      callback.call(thisArg, value, name, this);
      pairs = getHeaders(this);
      i++;
    }
  }
  /**
   * Overwrite header values given name
   *
   * @param   String  name   Header name
   * @param   String  value  Header value
   * @return  Void
   */
  ;

_proto.set = function set(name, value) {
    name = `${name}`;
    value = `${value}`;
    validateName(name);
    validateValue(value);
    var key = find(this[MAP], name);
    this[MAP][key !== undefined ? key : name] = [value];
  }
  /**
   * Append a value onto existing header
   *
   * @param   String  name   Header name
   * @param   String  value  Header value
   * @return  Void
   */
  ;

_proto.append = function append(name, value) {
    name = `${name}`;
    value = `${value}`;
    validateName(name);
    validateValue(value);
    var key = find(this[MAP], name);

if (key !== undefined) {
      this[MAP][key].push(value);
    } else {
      this[MAP][name] = [value];
    }
  }
  /**
   * Check for header name existence
   *
   * @param   String   name  Header name
   * @return  Boolean
   */
  ;

_proto.has = function has(name) {
    name = `${name}`;
    validateName(name);
    return find(this[MAP], name) !== undefined;
  }
  /**
   * Delete all header values given name
   *
   * @param   String  name  Header name
   * @return  Void
   */
  ;

_proto.delete = function _delete(name) {
    name = `${name}`;
    validateName(name);
    var key = find(this[MAP], name);

if (key !== undefined) {
      delete this[MAP][key];
    }
  };

/**
   * Return raw headers (non-spec api)
   *
   * @return  Object
   */
  _proto.raw = function raw() {
    return this[MAP];
  }
  /**
   * Get an iterator on keys.
   *
   * @return  Iterator
   */
  ;

_proto.keys = function keys() {
    return createHeadersIterator(this, 'key');
  }
  /**
   * Get an iterator on values.
   *
   * @return  Iterator
   */
  ;

_proto.values = function values() {
    return createHeadersIterator(this, 'value');
  }
  /**
   * Get an iterator on entries.
   *
   * This is the default iterator of the Headers object.
   *
   * @return  Iterator
   */
  ;

_proto[_Symbol$iterator] = function () {
    return createHeadersIterator(this, 'key+value');
  };

return Headers;
}(Symbol.iterator);
Headers.prototype.entries = Headers.prototype[Symbol.iterator];
Object.defineProperty(Headers.prototype, Symbol.toStringTag, {
  value: 'Headers',
  writable: false,
  enumerable: false,
  configurable: true
});
Object.defineProperties(Headers.prototype, {
  get: {
    enumerable: true
  },
  forEach: {
    enumerable: true
  },
  set: {
    enumerable: true
  },
  append: {
    enumerable: true
  },
  has: {
    enumerable: true
  },
  delete: {
    enumerable: true
  },
  keys: {
    enumerable: true
  },
  values: {
    enumerable: true
  },
  entries: {
    enumerable: true
  }
});

function getHeaders(headers, kind) {
  if (kind === void 0) {
    kind = 'key+value';
  }

var INTERNAL = Symbol('internal');

function createHeadersIterator(target, kind) {
  var iterator = Object.create(HeadersIteratorPrototype);
  iterator[INTERNAL] = {
    target,
    kind,
    index: 0
  };
  return iterator;
}

var HeadersIteratorPrototype = Object.setPrototypeOf({
  next() {
    // istanbul ignore if
    if (!this || Object.getPrototypeOf(this) !== HeadersIteratorPrototype) {
      throw new TypeError('Value of `this` is not a HeadersIterator');
    }

var _this$INTERNAL = this[INTERNAL],
        target = _this$INTERNAL.target,
        kind = _this$INTERNAL.kind,
        index = _this$INTERNAL.index;
    var values = getHeaders(target, kind);
    var len = values.length;

if (index >= len) {
      return {
        value: undefined,
        done: true
      };
    }

this[INTERNAL].index = index + 1;
    return {
      value: values[index],
      done: false
    };
  }

}, Object.getPrototypeOf(Object.getPrototypeOf([][Symbol.iterator]())));
Object.defineProperty(HeadersIteratorPrototype, Symbol.toStringTag, {
  value: 'HeadersIterator',
  writable: false,
  enumerable: false,
  configurable: true
});
/**
 * Export the Headers object in a form that Node.js can consume.
 *
 * @param   Headers  headers
 * @return  Object
 */

function exportNodeCompatibleHeaders(headers) {
  var obj = Object.assign({
    __proto__: null
  }, headers[MAP]); // http.request() only supports string as Host header. This hack makes
  // specifying custom Host header possible.

var hostHeaderKey = find(headers[MAP], 'Host');

if (hostHeaderKey !== undefined) {
    obj[hostHeaderKey] = obj[hostHeaderKey][0];
  }

return obj;
}
/**
 * Create a Headers object from an object of headers, ignoring those that do
 * not conform to HTTP grammar productions.
 *
 * @param   Object  obj  Object of headers
 * @return  Headers
 */

function createHeadersLenient(obj) {
  var headers = new Headers();

for (var _i4 = 0, _Object$keys2 = Object.keys(obj); _i4 < _Object$keys2.length; _i4++) {
    var name = _Object$keys2[_i4];

if (invalidTokenRegex.test(name)) {
      continue;
    }

if (Array.isArray(obj[name])) {
      for (var _iterator3 = _createForOfIteratorHelperLoose(obj[name]), _step3; !(_step3 = _iterator3()).done;) {
        var val = _step3.value;

if (invalidHeaderCharRegex.test(val)) {
          continue;
        }

if (headers[MAP][name] === undefined) {
          headers[MAP][name] = [val];
        } else {
          headers[MAP][name].push(val);
        }
      }
    } else if (!invalidHeaderCharRegex.test(obj[name])) {
      headers[MAP][name] = [obj[name]];
    }
  }

return headers;
}

var INTERNALS$1 = Symbol('Response internals'); // fix an issue where "STATUS_CODES" aren't a named export for node <10

var STATUS_CODES = http.STATUS_CODES;
/**
 * Response class
 *
 * @param   Stream  body  Readable stream
 * @param   Object  opts  Response options
 * @return  Void
 */

var Response = /*#__PURE__*/function () {
  function Response(body, opts) {
    if (body === void 0) {
      body = null;
    }

if (opts === void 0) {
      opts = {};
    }

Body.call(this, body, opts);
    var status = opts.status || 200;
    var headers = new Headers(opts.headers);

if (body != null && !headers.has('Content-Type')) {
      var contentType = extractContentType(body);

if (contentType) {
        headers.append('Content-Type', contentType);
      }
    }

this[INTERNALS$1] = {
      url: opts.url,
      status,
      statusText: opts.statusText || STATUS_CODES[status],
      headers,
      counter: opts.counter
    };
  }

var _proto = Response.prototype;

/**
   * Clone this response
   *
   * @return  Response
   */
  _proto.clone = function clone$1() {
    return new Response(clone(this), {
      url: this.url,
      status: this.status,
      statusText: this.statusText,
      headers: this.headers,
      ok: this.ok,
      redirected: this.redirected
    });
  };

_createClass(Response, [{
    key: "url",
    get: function get() {
      return this[INTERNALS$1].url || '';
    }
  }, {
    key: "status",
    get: function get() {
      return this[INTERNALS$1].status;
    }
    /**
     * Convenience property representing if the request ended normally
     */

}, {
    key: "ok",
    get: function get() {
      return this[INTERNALS$1].status >= 200 && this[INTERNALS$1].status < 300;
    }
  }, {
    key: "redirected",
    get: function get() {
      return this[INTERNALS$1].counter > 0;
    }
  }, {
    key: "statusText",
    get: function get() {
      return this[INTERNALS$1].statusText;
    }
  }, {
    key: "headers",
    get: function get() {
      return this[INTERNALS$1].headers;
    }
  }]);

return Response;
}();
Body.mixIn(Response.prototype);
Object.defineProperties(Response.prototype, {
  url: {
    enumerable: true
  },
  status: {
    enumerable: true
  },
  ok: {
    enumerable: true
  },
  redirected: {
    enumerable: true
  },
  statusText: {
    enumerable: true
  },
  headers: {
    enumerable: true
  },
  clone: {
    enumerable: true
  }
});
Object.defineProperty(Response.prototype, Symbol.toStringTag, {
  value: 'Response',
  writable: false,
  enumerable: false,
  configurable: true
});

var INTERNALS = Symbol('Request internals');
var URL$1 = Url.URL || whatwgUrl.URL; // fix an issue where "format", "parse" aren't a named export for node <10

var parse_url = Url.parse;
var format_url = Url.format;
/**
 * Wrapper around `new URL` to handle arbitrary URLs
 *
 * @param  {string} urlStr
 * @return {void}
 */

function parseURL(urlStr) {
  /*
  	Check whether the URL is absolute or not
  		Scheme: https://tools.ietf.org/html/rfc3986#section-3.1
  	Absolute URL: https://tools.ietf.org/html/rfc3986#section-4.3
  */
  if (/^[a-zA-Z][a-zA-Z\d+\-.]*:/.exec(urlStr)) {
    urlStr = new URL$1(urlStr).toString();
  } // Fallback to old implementation for arbitrary URLs

return parse_url(urlStr);
}

var streamDestructionSupported = ('destroy' in Stream.Readable.prototype);
/**
 * Check if a value is an instance of Request.
 *
 * @param   Mixed   input
 * @return  Boolean
 */

function isRequest(input) {
  return typeof input === 'object' && typeof input[INTERNALS] === 'object';
}

function isAbortSignal(signal) {
  var proto = signal && typeof signal === 'object' && Object.getPrototypeOf(signal);
  return !!(proto && proto.constructor.name === 'AbortSignal');
}
/**
 * Request class
 *
 * @param   Mixed   input  Url or Request instance
 * @param   Object  init   Custom options
 * @return  Void
 */

var Request = /*#__PURE__*/function () {
  function Request(input, init) {
    if (init === void 0) {
      init = {};
    }

var parsedURL; // normalize input

if (!isRequest(input)) {
      if (input && input.href) {
        // in order to support Node.js' Url objects; though WHATWG's URL objects
        // will fall into this branch also (since their `toString()` will return
        // `href` property anyway)
        parsedURL = parseURL(input.href);
      } else {
        // coerce input to a string before attempting to parse
        parsedURL = parseURL(`${input}`);
      }

input = {};
    } else {
      parsedURL = parseURL(input.url);
    }

var method = init.method || input.method || 'GET';
    method = method.toUpperCase();

if ((init.body != null || isRequest(input) && input.body !== null) && (method === 'GET' || method === 'HEAD')) {
      throw new TypeError('Request with GET/HEAD method cannot have body');
    }

var inputBody = init.body != null ? init.body : isRequest(input) && input.body !== null ? clone(input) : null;
    Body.call(this, inputBody, {
      timeout: init.timeout || input.timeout || 0,
      size: init.size || input.size || 0
    });
    var headers = new Headers(init.headers || input.headers || {});

if (inputBody != null && !headers.has('Content-Type')) {
      var contentType = extractContentType(inputBody);

if (contentType) {
        headers.append('Content-Type', contentType);
      }
    }

var signal = isRequest(input) ? input.signal : null;
    if ('signal' in init) signal = init.signal;

if (signal != null && !isAbortSignal(signal)) {
      throw new TypeError('Expected signal to be an instanceof AbortSignal');
    }

this[INTERNALS] = {
      method,
      redirect: init.redirect || input.redirect || 'follow',
      headers,
      parsedURL,
      signal
    }; // node-fetch-only options

this.follow = init.follow !== undefined ? init.follow : input.follow !== undefined ? input.follow : 20;
    this.compress = init.compress !== undefined ? init.compress : input.compress !== undefined ? input.compress : true;
    this.counter = init.counter || input.counter || 0;
    this.agent = init.agent || input.agent;
  }

var _proto = Request.prototype;

/**
   * Clone this request
   *
   * @return  Request
   */
  _proto.clone = function clone() {
    return new Request(this);
  };

_createClass(Request, [{
    key: "method",
    get: function get() {
      return this[INTERNALS].method;
    }
  }, {
    key: "url",
    get: function get() {
      return format_url(this[INTERNALS].parsedURL);
    }
  }, {
    key: "headers",
    get: function get() {
      return this[INTERNALS].headers;
    }
  }, {
    key: "redirect",
    get: function get() {
      return this[INTERNALS].redirect;
    }
  }, {
    key: "signal",
    get: function get() {
      return this[INTERNALS].signal;
    }
  }]);

return Request;
}();
Body.mixIn(Request.prototype);
Object.defineProperty(Request.prototype, Symbol.toStringTag, {
  value: 'Request',
  writable: false,
  enumerable: false,
  configurable: true
});
Object.defineProperties(Request.prototype, {
  method: {
    enumerable: true
  },
  url: {
    enumerable: true
  },
  headers: {
    enumerable: true
  },
  redirect: {
    enumerable: true
  },
  clone: {
    enumerable: true
  },
  signal: {
    enumerable: true
  }
});
/**
 * Convert a Request to Node.js http request options.
 *
 * @param   Request  A Request instance
 * @return  Object   The options object to be passed to http.request
 */

function getNodeRequestOptions(request) {
  var parsedURL = request[INTERNALS].parsedURL;
  var headers = new Headers(request[INTERNALS].headers); // fetch step 1.3

if (!headers.has('Accept')) {
    headers.set('Accept', '*/*');
  } // Basic fetch

if (!parsedURL.protocol || !parsedURL.hostname) {
    throw new TypeError('Only absolute URLs are supported');
  }

if (!/^https?:$/.test(parsedURL.protocol)) {
    throw new TypeError('Only HTTP(S) protocols are supported');
  }

if (request.signal && request.body instanceof Stream.Readable && !streamDestructionSupported) {
    throw new Error('Cancellation of streamed requests with AbortSignal is not supported in node < 8');
  } // HTTP-network-or-cache fetch steps 2.4-2.7

var contentLengthValue = null;

if (request.body == null && /^(POST|PUT)$/i.test(request.method)) {
    contentLengthValue = '0';
  }

if (request.body != null) {
    var totalBytes = getTotalBytes(request);

if (typeof totalBytes === 'number') {
      contentLengthValue = String(totalBytes);
    }
  }

if (contentLengthValue) {
    headers.set('Content-Length', contentLengthValue);
  } // HTTP-network-or-cache fetch step 2.11

if (!headers.has('User-Agent')) {
    headers.set('User-Agent', 'node-fetch/1.0 (+https://github.com/bitinn/node-fetch)');
  } // HTTP-network-or-cache fetch step 2.15

if (request.compress && !headers.has('Accept-Encoding')) {
    headers.set('Accept-Encoding', 'gzip,deflate');
  }

var agent = request.agent;

if (typeof agent === 'function') {
    agent = agent(parsedURL);
  }

if (!headers.has('Connection') && !agent) {
    headers.set('Connection', 'close');
  } // HTTP-network fetch step 4.2
  // chunked encoding is handled by Node.js

return Object.assign({}, parsedURL, {
    method: request.method,
    headers: exportNodeCompatibleHeaders(headers),
    agent
  });
}

/**
 * abort-error.js
 *
 * AbortError interface for cancelled requests
 */

/**
 * Create AbortError instance
 *
 * @param   String      message      Error message for human
 * @return  AbortError
 */
function AbortError(message) {
  Error.call(this, message);
  this.type = 'aborted';
  this.message = message; // hide custom error implementation details from end-users

Error.captureStackTrace(this, this.constructor);
}
AbortError.prototype = Object.create(Error.prototype);
AbortError.prototype.constructor = AbortError;
AbortError.prototype.name = 'AbortError';

/**
 * index.js
 *
 * a request API compatible with window.fetch
 *
 * All spec algorithm step numbers are based on https://fetch.spec.whatwg.org/commit-snapshots/ae716822cb3a61843226cd090eefc6589446c1d2/.
 */
var URL = Url.URL || whatwgUrl.URL; // fix an issue where "PassThrough", "resolve" aren't a named export for node <10

var PassThrough = Stream.PassThrough;

var isDomainOrSubdomain = function isDomainOrSubdomain(destination, original) {
  var orig = new URL(original).hostname;
  var dest = new URL(destination).hostname;
  return orig === dest || orig[orig.length - dest.length - 1] === '.' && orig.endsWith(dest);
};
/**
 * Fetch function
 *
 * @param   Mixed    url   Absolute url or Request instance
 * @param   Object   opts  Fetch options
 * @return  Promise
 */

function fetch(url, opts) {
  // allow custom promise
  if (!fetch.Promise) {
    throw new Error('native promise missing, set fetch.Promise to your favorite alternative');
  }

Body.Promise = fetch.Promise; // wrap http.request into fetch

return new fetch.Promise(function (resolve, reject) {
    // build request object
    var request = new Request(url, opts);
    var options = getNodeRequestOptions(request);
    var send = (options.protocol === 'https:' ? https : http).request;
    var signal = request.signal;
    var response = null;

var abort = function abort() {
      var error = new AbortError('The user aborted a request.');
      reject(error);

if (request.body && request.body instanceof Stream.Readable) {
        request.body.destroy(error);
      }

if (!response || !response.body) return;
      response.body.emit('error', error);
    };

if (signal && signal.aborted) {
      abort();
      return;
    }

var abortAndFinalize = function abortAndFinalize() {
      abort();
      finalize();
    }; // send request

var req = send(options);
    var reqTimeout;

if (signal) {
      signal.addEventListener('abort', abortAndFinalize);
    }

function finalize() {
      req.abort();
      if (signal) signal.removeEventListener('abort', abortAndFinalize);
      clearTimeout(reqTimeout);
    }

if (request.timeout) {
      req.once('socket', function (socket) {
        reqTimeout = setTimeout(function () {
          reject(new FetchError(`network timeout at: ${request.url}`, 'request-timeout'));
          finalize();
        }, request.timeout);
      });
    }

req.on('error', function (err) {
      reject(new FetchError(`request to ${request.url} failed, reason: ${err.message}`, 'system', err));
      finalize();
    });
    req.on('response', function (res) {
      clearTimeout(reqTimeout);
      var headers = createHeadersLenient(res.headers); // HTTP fetch step 5

if (fetch.isRedirect(res.statusCode)) {
        // HTTP fetch step 5.2
        var location = headers.get('Location'); // HTTP fetch step 5.3

var locationURL = null;

try {
          locationURL = location === null ? null : new URL(location, request.url).toString();
        } catch (err) {
          // error here can only be invalid URL in Location: header
          // do not throw when options.redirect == manual
          // let the user extract the errorneous redirect URL
          if (request.redirect !== 'manual') {
            reject(new FetchError(`uri requested responds with an invalid redirect URL: ${location}`, 'invalid-redirect'));
            finalize();
            return;
          }
        } // HTTP fetch step 5.5

switch (request.redirect) {
          case 'error':
            reject(new FetchError(`uri requested responds with a redirect, redirect mode is set to error: ${request.url}`, 'no-redirect'));
            finalize();
            return;

case 'manual':
            // node-fetch-specific step: make manual redirect a bit easier to use by setting the Location header value to the resolved URL.
            if (locationURL !== null) {
              // handle corrupted header
              try {
                headers.set('Location', locationURL);
              } catch (err) {
                // istanbul ignore next: nodejs server prevent invalid response headers, we can't test this through normal request
                reject(err);
              }
            }

break;

case 'follow':
            // HTTP-redirect fetch step 2
            if (locationURL === null) {
              break;
            } // HTTP-redirect fetch step 5

if (request.counter >= request.follow) {
              reject(new FetchError(`maximum redirect reached at: ${request.url}`, 'max-redirect'));
              finalize();
              return;
            } // HTTP-redirect fetch step 6 (counter increment)
            // Create a new Request object.

var requestOpts = {
              headers: new Headers(request.headers),
              follow: request.follow,
              counter: request.counter + 1,
              agent: request.agent,
              compress: request.compress,
              method: request.method,
              body: request.body,
              signal: request.signal,
              timeout: request.timeout,
              size: request.size
            };

if (!isDomainOrSubdomain(request.url, locationURL)) {
              for (var _i = 0, _arr = ['authorization', 'www-authenticate', 'cookie', 'cookie2']; _i < _arr.length; _i++) {
                var name = _arr[_i];
                requestOpts.headers.delete(name);
              }
            } // HTTP-redirect fetch step 9

if (res.statusCode !== 303 && request.body && getTotalBytes(request) === null) {
              reject(new FetchError('Cannot follow redirect with body being a readable stream', 'unsupported-redirect'));
              finalize();
              return;
            } // HTTP-redirect fetch step 11

if (res.statusCode === 303 || (res.statusCode === 301 || res.statusCode === 302) && request.method === 'POST') {
              requestOpts.method = 'GET';
              requestOpts.body = undefined;
              requestOpts.headers.delete('content-length');
            } // HTTP-redirect fetch step 15

resolve(fetch(new Request(locationURL, requestOpts)));
            finalize();
            return;
        }
      } // prepare response

res.once('end', function () {
        if (signal) signal.removeEventListener('abort', abortAndFinalize);
      });
      var body = res.pipe(new PassThrough());
      var response_options = {
        url: request.url,
        status: res.statusCode,
        statusText: res.statusMessage,
        headers: headers,
        size: request.size,
        timeout: request.timeout,
        counter: request.counter
      }; // HTTP-network fetch step 12.1.1.3

var codings = headers.get('Content-Encoding'); // HTTP-network fetch step 12.1.1.4: handle content codings
      // in following scenarios we ignore compression support
      // 1. compression support is disabled
      // 2. HEAD request
      // 3. no Content-Encoding header
      // 4. no content response (204)
      // 5. content not modified response (304)

if (!request.compress || request.method === 'HEAD' || codings === null || res.statusCode === 204 || res.statusCode === 304) {
        response = new Response(body, response_options);
        resolve(response);
        return;
      } // For Node v6+
      // Be less strict when decoding compressed responses, since sometimes
      // servers send slightly invalid responses that are still accepted
      // by common browsers.
      // Always using Z_SYNC_FLUSH is what cURL does.

var zlibOptions = {
        flush: zlib.Z_SYNC_FLUSH,
        finishFlush: zlib.Z_SYNC_FLUSH
      }; // for gzip

if (codings == 'gzip' || codings == 'x-gzip') {
        body = body.pipe(zlib.createGunzip(zlibOptions));
        response = new Response(body, response_options);
        resolve(response);
        return;
      } // for deflate

if (codings == 'deflate' || codings == 'x-deflate') {
        // handle the infamous raw deflate response from old servers
        // a hack for old IIS and Apache servers
        var raw = res.pipe(new PassThrough());
        raw.once('data', function (chunk) {
          // see http://stackoverflow.com/questions/37519828
          if ((chunk[0] & 0x0F) === 0x08) {
            body = body.pipe(zlib.createInflate());
          } else {
            body = body.pipe(zlib.createInflateRaw());
          }

response = new Response(body, response_options);
          resolve(response);
        });
        return;
      } // for br

if (codings == 'br' && typeof zlib.createBrotliDecompress === 'function') {
        body = body.pipe(zlib.createBrotliDecompress());
        response = new Response(body, response_options);
        resolve(response);
        return;
      } // otherwise, use response as-is

response = new Response(body, response_options);
      resolve(response);
    });
    writeToStream(req, request);
  });
}
/**
 * Redirect code matching
 *
 * @param   Number   code  Status code
 * @return  Boolean
 */

fetch.isRedirect = function (code) {
  return code === 301 || code === 302 || code === 303 || code === 307 || code === 308;
}; // expose Promise

fetch.Promise = global.Promise;
module.exports = exports = fetch;

export { FetchError, Headers, Request, Response, fetch as default };

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