Add extracted source directory and README navigation

extracted-source/node_modules/axios/lib/helpers/AxiosTransformStream.js

@@ -0,0 +1,156 @@
+'use strict';
+
+import stream from 'stream';
+import utils from '../utils.js';
+
+const kInternals = Symbol('internals');
+
+class AxiosTransformStream extends stream.Transform {
+  constructor(options) {
+    options = utils.toFlatObject(
+      options,
+      {
+        maxRate: 0,
+        chunkSize: 64 * 1024,
+        minChunkSize: 100,
+        timeWindow: 500,
+        ticksRate: 2,
+        samplesCount: 15,
+      },
+      null,
+      (prop, source) => {
+        return !utils.isUndefined(source[prop]);
+      }
+    );
+
+    super({
+      readableHighWaterMark: options.chunkSize,
+    });
+
+    const internals = (this[kInternals] = {
+      timeWindow: options.timeWindow,
+      chunkSize: options.chunkSize,
+      maxRate: options.maxRate,
+      minChunkSize: options.minChunkSize,
+      bytesSeen: 0,
+      isCaptured: false,
+      notifiedBytesLoaded: 0,
+      ts: Date.now(),
+      bytes: 0,
+      onReadCallback: null,
+    });
+
+    this.on('newListener', (event) => {
+      if (event === 'progress') {
+        if (!internals.isCaptured) {
+          internals.isCaptured = true;
+        }
+      }
+    });
+  }
+
+  _read(size) {
+    const internals = this[kInternals];
+
+    if (internals.onReadCallback) {
+      internals.onReadCallback();
+    }
+
+    return super._read(size);
+  }
+
+  _transform(chunk, encoding, callback) {
+    const internals = this[kInternals];
+    const maxRate = internals.maxRate;
+
+    const readableHighWaterMark = this.readableHighWaterMark;
+
+    const timeWindow = internals.timeWindow;
+
+    const divider = 1000 / timeWindow;
+    const bytesThreshold = maxRate / divider;
+    const minChunkSize =
+      internals.minChunkSize !== false
+        ? Math.max(internals.minChunkSize, bytesThreshold * 0.01)
+        : 0;
+
+    const pushChunk = (_chunk, _callback) => {
+      const bytes = Buffer.byteLength(_chunk);
+      internals.bytesSeen += bytes;
+      internals.bytes += bytes;
+
+      internals.isCaptured && this.emit('progress', internals.bytesSeen);
+
+      if (this.push(_chunk)) {
+        process.nextTick(_callback);
+      } else {
+        internals.onReadCallback = () => {
+          internals.onReadCallback = null;
+          process.nextTick(_callback);
+        };
+      }
+    };
+
+    const transformChunk = (_chunk, _callback) => {
+      const chunkSize = Buffer.byteLength(_chunk);
+      let chunkRemainder = null;
+      let maxChunkSize = readableHighWaterMark;
+      let bytesLeft;
+      let passed = 0;
+
+      if (maxRate) {
+        const now = Date.now();
+
+        if (!internals.ts || (passed = now - internals.ts) >= timeWindow) {
+          internals.ts = now;
+          bytesLeft = bytesThreshold - internals.bytes;
+          internals.bytes = bytesLeft < 0 ? -bytesLeft : 0;
+          passed = 0;
+        }
+
+        bytesLeft = bytesThreshold - internals.bytes;
+      }
+
+      if (maxRate) {
+        if (bytesLeft <= 0) {
+          // next time window
+          return setTimeout(() => {
+            _callback(null, _chunk);
+          }, timeWindow - passed);
+        }
+
+        if (bytesLeft < maxChunkSize) {
+          maxChunkSize = bytesLeft;
+        }
+      }
+
+      if (maxChunkSize && chunkSize > maxChunkSize && chunkSize - maxChunkSize > minChunkSize) {
+        chunkRemainder = _chunk.subarray(maxChunkSize);
+        _chunk = _chunk.subarray(0, maxChunkSize);
+      }
+
+      pushChunk(
+        _chunk,
+        chunkRemainder
+          ? () => {
+              process.nextTick(_callback, null, chunkRemainder);
+            }
+          : _callback
+      );
+    };
+
+    transformChunk(chunk, function transformNextChunk(err, _chunk) {
+      if (err) {
+        return callback(err);
+      }
+
+      if (_chunk) {
+        transformChunk(_chunk, transformNextChunk);
+      } else {
+        callback(null);
+      }
+    });
+  }
+}
+
+export default AxiosTransformStream;

extracted-source/node_modules/axios/lib/helpers/AxiosURLSearchParams.js

@@ -0,0 +1,62 @@
+'use strict';
+
+import toFormData from './toFormData.js';
+
+/**
+ * It encodes a string by replacing all characters that are not in the unreserved set with
+ * their percent-encoded equivalents
+ *
+ * @param {string} str - The string to encode.
+ *
+ * @returns {string} The encoded string.
+ */
+function encode(str) {
+  const charMap = {
+    '!': '%21',
+    "'": '%27',
+    '(': '%28',
+    ')': '%29',
+    '~': '%7E',
+    '%20': '+',
+    '%00': '\x00',
+  };
+  return encodeURIComponent(str).replace(/[!'()~]|%20|%00/g, function replacer(match) {
+    return charMap[match];
+  });
+}
+
+/**
+ * It takes a params object and converts it to a FormData object
+ *
+ * @param {Object<string, any>} params - The parameters to be converted to a FormData object.
+ * @param {Object<string, any>} options - The options object passed to the Axios constructor.
+ *
+ * @returns {void}
+ */
+function AxiosURLSearchParams(params, options) {
+  this._pairs = [];
+
+  params && toFormData(params, this, options);
+}
+
+const prototype = AxiosURLSearchParams.prototype;
+
+prototype.append = function append(name, value) {
+  this._pairs.push([name, value]);
+};
+
+prototype.toString = function toString(encoder) {
+  const _encode = encoder
+    ? function (value) {
+        return encoder.call(this, value, encode);
+      }
+    : encode;
+
+  return this._pairs
+    .map(function each(pair) {
+      return _encode(pair[0]) + '=' + _encode(pair[1]);
+    }, '')
+    .join('&');
+};
+
+export default AxiosURLSearchParams;

extracted-source/node_modules/axios/lib/helpers/HttpStatusCode.js

@@ -0,0 +1,77 @@
+const HttpStatusCode = {
+  Continue: 100,
+  SwitchingProtocols: 101,
+  Processing: 102,
+  EarlyHints: 103,
+  Ok: 200,
+  Created: 201,
+  Accepted: 202,
+  NonAuthoritativeInformation: 203,
+  NoContent: 204,
+  ResetContent: 205,
+  PartialContent: 206,
+  MultiStatus: 207,
+  AlreadyReported: 208,
+  ImUsed: 226,
+  MultipleChoices: 300,
+  MovedPermanently: 301,
+  Found: 302,
+  SeeOther: 303,
+  NotModified: 304,
+  UseProxy: 305,
+  Unused: 306,
+  TemporaryRedirect: 307,
+  PermanentRedirect: 308,
+  BadRequest: 400,
+  Unauthorized: 401,
+  PaymentRequired: 402,
+  Forbidden: 403,
+  NotFound: 404,
+  MethodNotAllowed: 405,
+  NotAcceptable: 406,
+  ProxyAuthenticationRequired: 407,
+  RequestTimeout: 408,
+  Conflict: 409,
+  Gone: 410,
+  LengthRequired: 411,
+  PreconditionFailed: 412,
+  PayloadTooLarge: 413,
+  UriTooLong: 414,
+  UnsupportedMediaType: 415,
+  RangeNotSatisfiable: 416,
+  ExpectationFailed: 417,
+  ImATeapot: 418,
+  MisdirectedRequest: 421,
+  UnprocessableEntity: 422,
+  Locked: 423,
+  FailedDependency: 424,
+  TooEarly: 425,
+  UpgradeRequired: 426,
+  PreconditionRequired: 428,
+  TooManyRequests: 429,
+  RequestHeaderFieldsTooLarge: 431,
+  UnavailableForLegalReasons: 451,
+  InternalServerError: 500,
+  NotImplemented: 501,
+  BadGateway: 502,
+  ServiceUnavailable: 503,
+  GatewayTimeout: 504,
+  HttpVersionNotSupported: 505,
+  VariantAlsoNegotiates: 506,
+  InsufficientStorage: 507,
+  LoopDetected: 508,
+  NotExtended: 510,
+  NetworkAuthenticationRequired: 511,
+  WebServerIsDown: 521,
+  ConnectionTimedOut: 522,
+  OriginIsUnreachable: 523,
+  TimeoutOccurred: 524,
+  SslHandshakeFailed: 525,
+  InvalidSslCertificate: 526,
+};
+
+Object.entries(HttpStatusCode).forEach(([key, value]) => {
+  HttpStatusCode[value] = key;
+});
+
+export default HttpStatusCode;

extracted-source/node_modules/axios/lib/helpers/ZlibHeaderTransformStream.js

@@ -0,0 +1,29 @@
+'use strict';
+
+import stream from 'stream';
+
+class ZlibHeaderTransformStream extends stream.Transform {
+  __transform(chunk, encoding, callback) {
+    this.push(chunk);
+    callback();
+  }
+
+  _transform(chunk, encoding, callback) {
+    if (chunk.length !== 0) {
+      this._transform = this.__transform;
+
+      // Add Default Compression headers if no zlib headers are present
+      if (chunk[0] !== 120) {
+        // Hex: 78
+        const header = Buffer.alloc(2);
+        header[0] = 120; // Hex: 78
+        header[1] = 156; // Hex: 9C
+        this.push(header, encoding);
+      }
+    }
+
+    this.__transform(chunk, encoding, callback);
+  }
+}
+
+export default ZlibHeaderTransformStream;

extracted-source/node_modules/axios/lib/helpers/bind.js

@@ -0,0 +1,14 @@
+'use strict';
+
+/**
+ * Create a bound version of a function with a specified `this` context
+ *
+ * @param {Function} fn - The function to bind
+ * @param {*} thisArg - The value to be passed as the `this` parameter
+ * @returns {Function} A new function that will call the original function with the specified `this` context
+ */
+export default function bind(fn, thisArg) {
+  return function wrap() {
+    return fn.apply(thisArg, arguments);
+  };
+}

extracted-source/node_modules/axios/lib/helpers/buildURL.js

@@ -0,0 +1,66 @@
+'use strict';
+
+import utils from '../utils.js';
+import AxiosURLSearchParams from '../helpers/AxiosURLSearchParams.js';
+
+/**
+ * It replaces all instances of the characters `:`, `$`, `,`, `+`, `[`, and `]` with their
+ * URI encoded counterparts
+ *
+ * @param {string} val The value to be encoded.
+ *
+ * @returns {string} The encoded value.
+ */
+function encode(val) {
+  return encodeURIComponent(val)
+    .replace(/%3A/gi, ':')
+    .replace(/%24/g, '$')
+    .replace(/%2C/gi, ',')
+    .replace(/%20/g, '+');
+}
+
+/**
+ * Build a URL by appending params to the end
+ *
+ * @param {string} url The base of the url (e.g., http://www.google.com)
+ * @param {object} [params] The params to be appended
+ * @param {?(object|Function)} options
+ *
+ * @returns {string} The formatted url
+ */
+export default function buildURL(url, params, options) {
+  if (!params) {
+    return url;
+  }
+
+  const _encode = (options && options.encode) || encode;
+
+  const _options = utils.isFunction(options)
+    ? {
+        serialize: options,
+      }
+    : options;
+
+  const serializeFn = _options && _options.serialize;
+
+  let serializedParams;
+
+  if (serializeFn) {
+    serializedParams = serializeFn(params, _options);
+  } else {
+    serializedParams = utils.isURLSearchParams(params)
+      ? params.toString()
+      : new AxiosURLSearchParams(params, _options).toString(_encode);
+  }
+
+  if (serializedParams) {
+    const hashmarkIndex = url.indexOf('#');
+
+    if (hashmarkIndex !== -1) {
+      url = url.slice(0, hashmarkIndex);
+    }
+    url += (url.indexOf('?') === -1 ? '?' : '&') + serializedParams;
+  }
+
+  return url;
+}

extracted-source/node_modules/axios/lib/helpers/callbackify.js

@@ -0,0 +1,18 @@
+import utils from '../utils.js';
+
+const callbackify = (fn, reducer) => {
+  return utils.isAsyncFn(fn)
+    ? function (...args) {
+        const cb = args.pop();
+        fn.apply(this, args).then((value) => {
+          try {
+            reducer ? cb(null, ...reducer(value)) : cb(null, value);
+          } catch (err) {
+            cb(err);
+          }
+        }, cb);
+      }
+    : fn;
+};
+
+export default callbackify;

extracted-source/node_modules/axios/lib/helpers/combineURLs.js

@@ -0,0 +1,15 @@
+'use strict';
+
+/**
+ * Creates a new URL by combining the specified URLs
+ *
+ * @param {string} baseURL The base URL
+ * @param {string} relativeURL The relative URL
+ *
+ * @returns {string} The combined URL
+ */
+export default function combineURLs(baseURL, relativeURL) {
+  return relativeURL
+    ? baseURL.replace(/\/?\/$/, '') + '/' + relativeURL.replace(/^\/+/, '')
+    : baseURL;
+}

extracted-source/node_modules/axios/lib/helpers/composeSignals.js

@@ -0,0 +1,56 @@
+import CanceledError from '../cancel/CanceledError.js';
+import AxiosError from '../core/AxiosError.js';
+import utils from '../utils.js';
+
+const composeSignals = (signals, timeout) => {
+  const { length } = (signals = signals ? signals.filter(Boolean) : []);
+
+  if (timeout || length) {
+    let controller = new AbortController();
+
+    let aborted;
+
+    const onabort = function (reason) {
+      if (!aborted) {
+        aborted = true;
+        unsubscribe();
+        const err = reason instanceof Error ? reason : this.reason;
+        controller.abort(
+          err instanceof AxiosError
+            ? err
+            : new CanceledError(err instanceof Error ? err.message : err)
+        );
+      }
+    };
+
+    let timer =
+      timeout &&
+      setTimeout(() => {
+        timer = null;
+        onabort(new AxiosError(`timeout of ${timeout}ms exceeded`, AxiosError.ETIMEDOUT));
+      }, timeout);
+
+    const unsubscribe = () => {
+      if (signals) {
+        timer && clearTimeout(timer);
+        timer = null;
+        signals.forEach((signal) => {
+          signal.unsubscribe
+            ? signal.unsubscribe(onabort)
+            : signal.removeEventListener('abort', onabort);
+        });
+        signals = null;
+      }
+    };
+
+    signals.forEach((signal) => signal.addEventListener('abort', onabort));
+
+    const { signal } = controller;
+
+    signal.unsubscribe = () => utils.asap(unsubscribe);
+
+    return signal;
+  }
+};
+
+export default composeSignals;

extracted-source/node_modules/axios/lib/helpers/cookies.js

@@ -0,0 +1,48 @@
+import utils from '../utils.js';
+import platform from '../platform/index.js';
+
+export default platform.hasStandardBrowserEnv
+  ? // Standard browser envs support document.cookie
+    {
+      write(name, value, expires, path, domain, secure, sameSite) {
+        if (typeof document === 'undefined') return;
+
+        const cookie = [`${name}=${encodeURIComponent(value)}`];
+
+        if (utils.isNumber(expires)) {
+          cookie.push(`expires=${new Date(expires).toUTCString()}`);
+        }
+        if (utils.isString(path)) {
+          cookie.push(`path=${path}`);
+        }
+        if (utils.isString(domain)) {
+          cookie.push(`domain=${domain}`);
+        }
+        if (secure === true) {
+          cookie.push('secure');
+        }
+        if (utils.isString(sameSite)) {
+          cookie.push(`SameSite=${sameSite}`);
+        }
+
+        document.cookie = cookie.join('; ');
+      },
+
+      read(name) {
+        if (typeof document === 'undefined') return null;
+        const match = document.cookie.match(new RegExp('(?:^|; )' + name + '=([^;]*)'));
+        return match ? decodeURIComponent(match[1]) : null;
+      },
+
+      remove(name) {
+        this.write(name, '', Date.now() - 86400000, '/');
+      },
+    }
+  : // Non-standard browser env (web workers, react-native) lack needed support.
+    {
+      write() {},
+      read() {
+        return null;
+      },
+      remove() {},
+    };

extracted-source/node_modules/axios/lib/helpers/estimateDataURLDecodedBytes.js

@@ -0,0 +1,73 @@
+/**
+ * Estimate decoded byte length of a data:// URL *without* allocating large buffers.
+ * - For base64: compute exact decoded size using length and padding;
+ *               handle %XX at the character-count level (no string allocation).
+ * - For non-base64: use UTF-8 byteLength of the encoded body as a safe upper bound.
+ *
+ * @param {string} url
+ * @returns {number}
+ */
+export default function estimateDataURLDecodedBytes(url) {
+  if (!url || typeof url !== 'string') return 0;
+  if (!url.startsWith('data:')) return 0;
+
+  const comma = url.indexOf(',');
+  if (comma < 0) return 0;
+
+  const meta = url.slice(5, comma);
+  const body = url.slice(comma + 1);
+  const isBase64 = /;base64/i.test(meta);
+
+  if (isBase64) {
+    let effectiveLen = body.length;
+    const len = body.length; // cache length
+
+    for (let i = 0; i < len; i++) {
+      if (body.charCodeAt(i) === 37 /* '%' */ && i + 2 < len) {
+        const a = body.charCodeAt(i + 1);
+        const b = body.charCodeAt(i + 2);
+        const isHex =
+          ((a >= 48 && a <= 57) || (a >= 65 && a <= 70) || (a >= 97 && a <= 102)) &&
+          ((b >= 48 && b <= 57) || (b >= 65 && b <= 70) || (b >= 97 && b <= 102));
+
+        if (isHex) {
+          effectiveLen -= 2;
+          i += 2;
+        }
+      }
+    }
+
+    let pad = 0;
+    let idx = len - 1;
+
+    const tailIsPct3D = (j) =>
+      j >= 2 &&
+      body.charCodeAt(j - 2) === 37 && // '%'
+      body.charCodeAt(j - 1) === 51 && // '3'
+      (body.charCodeAt(j) === 68 || body.charCodeAt(j) === 100); // 'D' or 'd'
+
+    if (idx >= 0) {
+      if (body.charCodeAt(idx) === 61 /* '=' */) {
+        pad++;
+        idx--;
+      } else if (tailIsPct3D(idx)) {
+        pad++;
+        idx -= 3;
+      }
+    }
+
+    if (pad === 1 && idx >= 0) {
+      if (body.charCodeAt(idx) === 61 /* '=' */) {
+        pad++;
+      } else if (tailIsPct3D(idx)) {
+        pad++;
+      }
+    }
+
+    const groups = Math.floor(effectiveLen / 4);
+    const bytes = groups * 3 - (pad || 0);
+    return bytes > 0 ? bytes : 0;
+  }
+
+  return Buffer.byteLength(body, 'utf8');
+}

extracted-source/node_modules/axios/lib/helpers/formDataToJSON.js

@@ -0,0 +1,95 @@
+'use strict';
+
+import utils from '../utils.js';
+
+/**
+ * It takes a string like `foo[x][y][z]` and returns an array like `['foo', 'x', 'y', 'z']
+ *
+ * @param {string} name - The name of the property to get.
+ *
+ * @returns An array of strings.
+ */
+function parsePropPath(name) {
+  // foo[x][y][z]
+  // foo.x.y.z
+  // foo-x-y-z
+  // foo x y z
+  return utils.matchAll(/\w+|\[(\w*)]/g, name).map((match) => {
+    return match[0] === '[]' ? '' : match[1] || match[0];
+  });
+}
+
+/**
+ * Convert an array to an object.
+ *
+ * @param {Array<any>} arr - The array to convert to an object.
+ *
+ * @returns An object with the same keys and values as the array.
+ */
+function arrayToObject(arr) {
+  const obj = {};
+  const keys = Object.keys(arr);
+  let i;
+  const len = keys.length;
+  let key;
+  for (i = 0; i < len; i++) {
+    key = keys[i];
+    obj[key] = arr[key];
+  }
+  return obj;
+}
+
+/**
+ * It takes a FormData object and returns a JavaScript object
+ *
+ * @param {string} formData The FormData object to convert to JSON.
+ *
+ * @returns {Object<string, any> | null} The converted object.
+ */
+function formDataToJSON(formData) {
+  function buildPath(path, value, target, index) {
+    let name = path[index++];
+
+    if (name === '__proto__') return true;
+
+    const isNumericKey = Number.isFinite(+name);
+    const isLast = index >= path.length;
+    name = !name && utils.isArray(target) ? target.length : name;
+
+    if (isLast) {
+      if (utils.hasOwnProp(target, name)) {
+        target[name] = [target[name], value];
+      } else {
+        target[name] = value;
+      }
+
+      return !isNumericKey;
+    }
+
+    if (!target[name] || !utils.isObject(target[name])) {
+      target[name] = [];
+    }
+
+    const result = buildPath(path, value, target[name], index);
+
+    if (result && utils.isArray(target[name])) {
+      target[name] = arrayToObject(target[name]);
+    }
+
+    return !isNumericKey;
+  }
+
+  if (utils.isFormData(formData) && utils.isFunction(formData.entries)) {
+    const obj = {};
+
+    utils.forEachEntry(formData, (name, value) => {
+      buildPath(parsePropPath(name), value, obj, 0);
+    });
+
+    return obj;
+  }
+
+  return null;
+}
+
+export default formDataToJSON;

extracted-source/node_modules/axios/lib/helpers/formDataToStream.js

@@ -0,0 +1,118 @@
+import util from 'util';
+import { Readable } from 'stream';
+import utils from '../utils.js';
+import readBlob from './readBlob.js';
+import platform from '../platform/index.js';
+
+const BOUNDARY_ALPHABET = platform.ALPHABET.ALPHA_DIGIT + '-_';
+
+const textEncoder = typeof TextEncoder === 'function' ? new TextEncoder() : new util.TextEncoder();
+
+const CRLF = '\r\n';
+const CRLF_BYTES = textEncoder.encode(CRLF);
+const CRLF_BYTES_COUNT = 2;
+
+class FormDataPart {
+  constructor(name, value) {
+    const { escapeName } = this.constructor;
+    const isStringValue = utils.isString(value);
+
+    let headers = `Content-Disposition: form-data; name="${escapeName(name)}"${
+      !isStringValue && value.name ? `; filename="${escapeName(value.name)}"` : ''
+    }${CRLF}`;
+
+    if (isStringValue) {
+      value = textEncoder.encode(String(value).replace(/\r?\n|\r\n?/g, CRLF));
+    } else {
+      headers += `Content-Type: ${value.type || 'application/octet-stream'}${CRLF}`;
+    }
+
+    this.headers = textEncoder.encode(headers + CRLF);
+
+    this.contentLength = isStringValue ? value.byteLength : value.size;
+
+    this.size = this.headers.byteLength + this.contentLength + CRLF_BYTES_COUNT;
+
+    this.name = name;
+    this.value = value;
+  }
+
+  async *encode() {
+    yield this.headers;
+
+    const { value } = this;
+
+    if (utils.isTypedArray(value)) {
+      yield value;
+    } else {
+      yield* readBlob(value);
+    }
+
+    yield CRLF_BYTES;
+  }
+
+  static escapeName(name) {
+    return String(name).replace(
+      /[\r\n"]/g,
+      (match) =>
+        ({
+          '\r': '%0D',
+          '\n': '%0A',
+          '"': '%22',
+        })[match]
+    );
+  }
+}
+
+const formDataToStream = (form, headersHandler, options) => {
+  const {
+    tag = 'form-data-boundary',
+    size = 25,
+    boundary = tag + '-' + platform.generateString(size, BOUNDARY_ALPHABET),
+  } = options || {};
+
+  if (!utils.isFormData(form)) {
+    throw TypeError('FormData instance required');
+  }
+
+  if (boundary.length < 1 || boundary.length > 70) {
+    throw Error('boundary must be 10-70 characters long');
+  }
+
+  const boundaryBytes = textEncoder.encode('--' + boundary + CRLF);
+  const footerBytes = textEncoder.encode('--' + boundary + '--' + CRLF);
+  let contentLength = footerBytes.byteLength;
+
+  const parts = Array.from(form.entries()).map(([name, value]) => {
+    const part = new FormDataPart(name, value);
+    contentLength += part.size;
+    return part;
+  });
+
+  contentLength += boundaryBytes.byteLength * parts.length;
+
+  contentLength = utils.toFiniteNumber(contentLength);
+
+  const computedHeaders = {
+    'Content-Type': `multipart/form-data; boundary=${boundary}`,
+  };
+
+  if (Number.isFinite(contentLength)) {
+    computedHeaders['Content-Length'] = contentLength;
+  }
+
+  headersHandler && headersHandler(computedHeaders);
+
+  return Readable.from(
+    (async function* () {
+      for (const part of parts) {
+        yield boundaryBytes;
+        yield* part.encode();
+      }
+
+      yield footerBytes;
+    })()
+  );
+};
+
+export default formDataToStream;

extracted-source/node_modules/axios/lib/helpers/fromDataURI.js

@@ -0,0 +1,53 @@
+'use strict';
+
+import AxiosError from '../core/AxiosError.js';
+import parseProtocol from './parseProtocol.js';
+import platform from '../platform/index.js';
+
+const DATA_URL_PATTERN = /^(?:([^;]+);)?(?:[^;]+;)?(base64|),([\s\S]*)$/;
+
+/**
+ * Parse data uri to a Buffer or Blob
+ *
+ * @param {String} uri
+ * @param {?Boolean} asBlob
+ * @param {?Object} options
+ * @param {?Function} options.Blob
+ *
+ * @returns {Buffer|Blob}
+ */
+export default function fromDataURI(uri, asBlob, options) {
+  const _Blob = (options && options.Blob) || platform.classes.Blob;
+  const protocol = parseProtocol(uri);
+
+  if (asBlob === undefined && _Blob) {
+    asBlob = true;
+  }
+
+  if (protocol === 'data') {
+    uri = protocol.length ? uri.slice(protocol.length + 1) : uri;
+
+    const match = DATA_URL_PATTERN.exec(uri);
+
+    if (!match) {
+      throw new AxiosError('Invalid URL', AxiosError.ERR_INVALID_URL);
+    }
+
+    const mime = match[1];
+    const isBase64 = match[2];
+    const body = match[3];
+    const buffer = Buffer.from(decodeURIComponent(body), isBase64 ? 'base64' : 'utf8');
+
+    if (asBlob) {
+      if (!_Blob) {
+        throw new AxiosError('Blob is not supported', AxiosError.ERR_NOT_SUPPORT);
+      }
+
+      return new _Blob([buffer], { type: mime });
+    }
+
+    return buffer;
+  }
+
+  throw new AxiosError('Unsupported protocol ' + protocol, AxiosError.ERR_NOT_SUPPORT);
+}

extracted-source/node_modules/axios/lib/helpers/isAbsoluteURL.js

@@ -0,0 +1,19 @@
+'use strict';
+
+/**
+ * Determines whether the specified URL is absolute
+ *
+ * @param {string} url The URL to test
+ *
+ * @returns {boolean} True if the specified URL is absolute, otherwise false
+ */
+export default function isAbsoluteURL(url) {
+  // A URL is considered absolute if it begins with "<scheme>://" or "//" (protocol-relative URL).
+  // RFC 3986 defines scheme name as a sequence of characters beginning with a letter and followed
+  // by any combination of letters, digits, plus, period, or hyphen.
+  if (typeof url !== 'string') {
+    return false;
+  }
+
+  return /^([a-z][a-z\d+\-.]*:)?\/\//i.test(url);
+}

extracted-source/node_modules/axios/lib/helpers/isAxiosError.js

@@ -0,0 +1,14 @@
+'use strict';
+
+import utils from '../utils.js';
+
+/**
+ * Determines whether the payload is an error thrown by Axios
+ *
+ * @param {*} payload The value to test
+ *
+ * @returns {boolean} True if the payload is an error thrown by Axios, otherwise false
+ */
+export default function isAxiosError(payload) {
+  return utils.isObject(payload) && payload.isAxiosError === true;
+}

extracted-source/node_modules/axios/lib/helpers/isURLSameOrigin.js

@@ -0,0 +1,16 @@
+import platform from '../platform/index.js';
+
+export default platform.hasStandardBrowserEnv
+  ? ((origin, isMSIE) => (url) => {
+      url = new URL(url, platform.origin);
+
+      return (
+        origin.protocol === url.protocol &&
+        origin.host === url.host &&
+        (isMSIE || origin.port === url.port)
+      );
+    })(
+      new URL(platform.origin),
+      platform.navigator && /(msie|trident)/i.test(platform.navigator.userAgent)
+    )
+  : () => true;

extracted-source/node_modules/axios/lib/helpers/parseHeaders.js

@@ -0,0 +1,69 @@
+'use strict';
+
+import utils from '../utils.js';
+
+// RawAxiosHeaders whose duplicates are ignored by node
+// c.f. https://nodejs.org/api/http.html#http_message_headers
+const ignoreDuplicateOf = utils.toObjectSet([
+  'age',
+  'authorization',
+  'content-length',
+  'content-type',
+  'etag',
+  'expires',
+  'from',
+  'host',
+  'if-modified-since',
+  'if-unmodified-since',
+  'last-modified',
+  'location',
+  'max-forwards',
+  'proxy-authorization',
+  'referer',
+  'retry-after',
+  'user-agent',
+]);
+
+/**
+ * Parse headers into an object
+ *
+ * ```
+ * Date: Wed, 27 Aug 2014 08:58:49 GMT
+ * Content-Type: application/json
+ * Connection: keep-alive
+ * Transfer-Encoding: chunked
+ * ```
+ *
+ * @param {String} rawHeaders Headers needing to be parsed
+ *
+ * @returns {Object} Headers parsed into an object
+ */
+export default (rawHeaders) => {
+  const parsed = {};
+  let key;
+  let val;
+  let i;
+
+  rawHeaders &&
+    rawHeaders.split('\n').forEach(function parser(line) {
+      i = line.indexOf(':');
+      key = line.substring(0, i).trim().toLowerCase();
+      val = line.substring(i + 1).trim();
+
+      if (!key || (parsed[key] && ignoreDuplicateOf[key])) {
+        return;
+      }
+
+      if (key === 'set-cookie') {
+        if (parsed[key]) {
+          parsed[key].push(val);
+        } else {
+          parsed[key] = [val];
+        }
+      } else {
+        parsed[key] = parsed[key] ? parsed[key] + ', ' + val : val;
+      }
+    });
+
+  return parsed;
+};

extracted-source/node_modules/axios/lib/helpers/parseProtocol.js

@@ -0,0 +1,6 @@
+'use strict';
+
+export default function parseProtocol(url) {
+  const match = /^([-+\w]{1,25})(:?\/\/|:)/.exec(url);
+  return (match && match[1]) || '';
+}

extracted-source/node_modules/axios/lib/helpers/progressEventReducer.js

@@ -0,0 +1,51 @@
+import speedometer from './speedometer.js';
+import throttle from './throttle.js';
+import utils from '../utils.js';
+
+export const progressEventReducer = (listener, isDownloadStream, freq = 3) => {
+  let bytesNotified = 0;
+  const _speedometer = speedometer(50, 250);
+
+  return throttle((e) => {
+    const loaded = e.loaded;
+    const total = e.lengthComputable ? e.total : undefined;
+    const progressBytes = loaded - bytesNotified;
+    const rate = _speedometer(progressBytes);
+    const inRange = loaded <= total;
+
+    bytesNotified = loaded;
+
+    const data = {
+      loaded,
+      total,
+      progress: total ? loaded / total : undefined,
+      bytes: progressBytes,
+      rate: rate ? rate : undefined,
+      estimated: rate && total && inRange ? (total - loaded) / rate : undefined,
+      event: e,
+      lengthComputable: total != null,
+      [isDownloadStream ? 'download' : 'upload']: true,
+    };
+
+    listener(data);
+  }, freq);
+};
+
+export const progressEventDecorator = (total, throttled) => {
+  const lengthComputable = total != null;
+
+  return [
+    (loaded) =>
+      throttled[0]({
+        lengthComputable,
+        total,
+        loaded,
+      }),
+    throttled[1],
+  ];
+};
+
+export const asyncDecorator =
+  (fn) =>
+  (...args) =>
+    utils.asap(() => fn(...args));

extracted-source/node_modules/axios/lib/helpers/readBlob.js

@@ -0,0 +1,15 @@
+const { asyncIterator } = Symbol;
+
+const readBlob = async function* (blob) {
+  if (blob.stream) {
+    yield* blob.stream();
+  } else if (blob.arrayBuffer) {
+    yield await blob.arrayBuffer();
+  } else if (blob[asyncIterator]) {
+    yield* blob[asyncIterator]();
+  } else {
+    yield blob;
+  }
+};
+
+export default readBlob;

extracted-source/node_modules/axios/lib/helpers/resolveConfig.js

@@ -0,0 +1,70 @@
+import platform from '../platform/index.js';
+import utils from '../utils.js';
+import isURLSameOrigin from './isURLSameOrigin.js';
+import cookies from './cookies.js';
+import buildFullPath from '../core/buildFullPath.js';
+import mergeConfig from '../core/mergeConfig.js';
+import AxiosHeaders from '../core/AxiosHeaders.js';
+import buildURL from './buildURL.js';
+
+export default (config) => {
+  const newConfig = mergeConfig({}, config);
+
+  let { data, withXSRFToken, xsrfHeaderName, xsrfCookieName, headers, auth } = newConfig;
+
+  newConfig.headers = headers = AxiosHeaders.from(headers);
+
+  newConfig.url = buildURL(
+    buildFullPath(newConfig.baseURL, newConfig.url, newConfig.allowAbsoluteUrls),
+    config.params,
+    config.paramsSerializer
+  );
+
+  // HTTP basic authentication
+  if (auth) {
+    headers.set(
+      'Authorization',
+      'Basic ' +
+        btoa(
+          (auth.username || '') +
+            ':' +
+            (auth.password ? unescape(encodeURIComponent(auth.password)) : '')
+        )
+    );
+  }
+
+  if (utils.isFormData(data)) {
+    if (platform.hasStandardBrowserEnv || platform.hasStandardBrowserWebWorkerEnv) {
+      headers.setContentType(undefined); // browser handles it
+    } else if (utils.isFunction(data.getHeaders)) {
+      // Node.js FormData (like form-data package)
+      const formHeaders = data.getHeaders();
+      // Only set safe headers to avoid overwriting security headers
+      const allowedHeaders = ['content-type', 'content-length'];
+      Object.entries(formHeaders).forEach(([key, val]) => {
+        if (allowedHeaders.includes(key.toLowerCase())) {
+          headers.set(key, val);
+        }
+      });
+    }
+  }
+
+  // Add xsrf header
+  // This is only done if running in a standard browser environment.
+  // Specifically not if we're in a web worker, or react-native.
+
+  if (platform.hasStandardBrowserEnv) {
+    withXSRFToken && utils.isFunction(withXSRFToken) && (withXSRFToken = withXSRFToken(newConfig));
+
+    if (withXSRFToken || (withXSRFToken !== false && isURLSameOrigin(newConfig.url))) {
+      // Add xsrf header
+      const xsrfValue = xsrfHeaderName && xsrfCookieName && cookies.read(xsrfCookieName);
+
+      if (xsrfValue) {
+        headers.set(xsrfHeaderName, xsrfValue);
+      }
+    }
+  }
+
+  return newConfig;
+};

extracted-source/node_modules/axios/lib/helpers/speedometer.js

@@ -0,0 +1,55 @@
+'use strict';
+
+/**
+ * Calculate data maxRate
+ * @param {Number} [samplesCount= 10]
+ * @param {Number} [min= 1000]
+ * @returns {Function}
+ */
+function speedometer(samplesCount, min) {
+  samplesCount = samplesCount || 10;
+  const bytes = new Array(samplesCount);
+  const timestamps = new Array(samplesCount);
+  let head = 0;
+  let tail = 0;
+  let firstSampleTS;
+
+  min = min !== undefined ? min : 1000;
+
+  return function push(chunkLength) {
+    const now = Date.now();
+
+    const startedAt = timestamps[tail];
+
+    if (!firstSampleTS) {
+      firstSampleTS = now;
+    }
+
+    bytes[head] = chunkLength;
+    timestamps[head] = now;
+
+    let i = tail;
+    let bytesCount = 0;
+
+    while (i !== head) {
+      bytesCount += bytes[i++];
+      i = i % samplesCount;
+    }
+
+    head = (head + 1) % samplesCount;
+
+    if (head === tail) {
+      tail = (tail + 1) % samplesCount;
+    }
+
+    if (now - firstSampleTS < min) {
+      return;
+    }
+
+    const passed = startedAt && now - startedAt;
+
+    return passed ? Math.round((bytesCount * 1000) / passed) : undefined;
+  };
+}
+
+export default speedometer;

extracted-source/node_modules/axios/lib/helpers/spread.js

@@ -0,0 +1,28 @@
+'use strict';
+
+/**
+ * Syntactic sugar for invoking a function and expanding an array for arguments.
+ *
+ * Common use case would be to use `Function.prototype.apply`.
+ *
+ *  ```js
+ *  function f(x, y, z) {}
+ *  const args = [1, 2, 3];
+ *  f.apply(null, args);
+ *  ```
+ *
+ * With `spread` this example can be re-written.
+ *
+ *  ```js
+ *  spread(function(x, y, z) {})([1, 2, 3]);
+ *  ```
+ *
+ * @param {Function} callback
+ *
+ * @returns {Function}
+ */
+export default function spread(callback) {
+  return function wrap(arr) {
+    return callback.apply(null, arr);
+  };
+}

extracted-source/node_modules/axios/lib/helpers/throttle.js

@@ -0,0 +1,44 @@
+/**
+ * Throttle decorator
+ * @param {Function} fn
+ * @param {Number} freq
+ * @return {Function}
+ */
+function throttle(fn, freq) {
+  let timestamp = 0;
+  let threshold = 1000 / freq;
+  let lastArgs;
+  let timer;
+
+  const invoke = (args, now = Date.now()) => {
+    timestamp = now;
+    lastArgs = null;
+    if (timer) {
+      clearTimeout(timer);
+      timer = null;
+    }
+    fn(...args);
+  };
+
+  const throttled = (...args) => {
+    const now = Date.now();
+    const passed = now - timestamp;
+    if (passed >= threshold) {
+      invoke(args, now);
+    } else {
+      lastArgs = args;
+      if (!timer) {
+        timer = setTimeout(() => {
+          timer = null;
+          invoke(lastArgs);
+        }, threshold - passed);
+      }
+    }
+  };
+
+  const flush = () => lastArgs && invoke(lastArgs);
+
+  return [throttled, flush];
+}
+
+export default throttle;

extracted-source/node_modules/axios/lib/helpers/toFormData.js

@@ -0,0 +1,241 @@
+'use strict';
+
+import utils from '../utils.js';
+import AxiosError from '../core/AxiosError.js';
+// temporary hotfix to avoid circular references until AxiosURLSearchParams is refactored
+import PlatformFormData from '../platform/node/classes/FormData.js';
+
+/**
+ * Determines if the given thing is a array or js object.
+ *
+ * @param {string} thing - The object or array to be visited.
+ *
+ * @returns {boolean}
+ */
+function isVisitable(thing) {
+  return utils.isPlainObject(thing) || utils.isArray(thing);
+}
+
+/**
+ * It removes the brackets from the end of a string
+ *
+ * @param {string} key - The key of the parameter.
+ *
+ * @returns {string} the key without the brackets.
+ */
+function removeBrackets(key) {
+  return utils.endsWith(key, '[]') ? key.slice(0, -2) : key;
+}
+
+/**
+ * It takes a path, a key, and a boolean, and returns a string
+ *
+ * @param {string} path - The path to the current key.
+ * @param {string} key - The key of the current object being iterated over.
+ * @param {string} dots - If true, the key will be rendered with dots instead of brackets.
+ *
+ * @returns {string} The path to the current key.
+ */
+function renderKey(path, key, dots) {
+  if (!path) return key;
+  return path
+    .concat(key)
+    .map(function each(token, i) {
+      // eslint-disable-next-line no-param-reassign
+      token = removeBrackets(token);
+      return !dots && i ? '[' + token + ']' : token;
+    })
+    .join(dots ? '.' : '');
+}
+
+/**
+ * If the array is an array and none of its elements are visitable, then it's a flat array.
+ *
+ * @param {Array<any>} arr - The array to check
+ *
+ * @returns {boolean}
+ */
+function isFlatArray(arr) {
+  return utils.isArray(arr) && !arr.some(isVisitable);
+}
+
+const predicates = utils.toFlatObject(utils, {}, null, function filter(prop) {
+  return /^is[A-Z]/.test(prop);
+});
+
+/**
+ * Convert a data object to FormData
+ *
+ * @param {Object} obj
+ * @param {?Object} [formData]
+ * @param {?Object} [options]
+ * @param {Function} [options.visitor]
+ * @param {Boolean} [options.metaTokens = true]
+ * @param {Boolean} [options.dots = false]
+ * @param {?Boolean} [options.indexes = false]
+ *
+ * @returns {Object}
+ **/
+
+/**
+ * It converts an object into a FormData object
+ *
+ * @param {Object<any, any>} obj - The object to convert to form data.
+ * @param {string} formData - The FormData object to append to.
+ * @param {Object<string, any>} options
+ *
+ * @returns
+ */
+function toFormData(obj, formData, options) {
+  if (!utils.isObject(obj)) {
+    throw new TypeError('target must be an object');
+  }
+
+  // eslint-disable-next-line no-param-reassign
+  formData = formData || new (PlatformFormData || FormData)();
+
+  // eslint-disable-next-line no-param-reassign
+  options = utils.toFlatObject(
+    options,
+    {
+      metaTokens: true,
+      dots: false,
+      indexes: false,
+    },
+    false,
+    function defined(option, source) {
+      // eslint-disable-next-line no-eq-null,eqeqeq
+      return !utils.isUndefined(source[option]);
+    }
+  );
+
+  const metaTokens = options.metaTokens;
+  // eslint-disable-next-line no-use-before-define
+  const visitor = options.visitor || defaultVisitor;
+  const dots = options.dots;
+  const indexes = options.indexes;
+  const _Blob = options.Blob || (typeof Blob !== 'undefined' && Blob);
+  const useBlob = _Blob && utils.isSpecCompliantForm(formData);
+
+  if (!utils.isFunction(visitor)) {
+    throw new TypeError('visitor must be a function');
+  }
+
+  function convertValue(value) {
+    if (value === null) return '';
+
+    if (utils.isDate(value)) {
+      return value.toISOString();
+    }
+
+    if (utils.isBoolean(value)) {
+      return value.toString();
+    }
+
+    if (!useBlob && utils.isBlob(value)) {
+      throw new AxiosError('Blob is not supported. Use a Buffer instead.');
+    }
+
+    if (utils.isArrayBuffer(value) || utils.isTypedArray(value)) {
+      return useBlob && typeof Blob === 'function' ? new Blob([value]) : Buffer.from(value);
+    }
+
+    return value;
+  }
+
+  /**
+   * Default visitor.
+   *
+   * @param {*} value
+   * @param {String|Number} key
+   * @param {Array<String|Number>} path
+   * @this {FormData}
+   *
+   * @returns {boolean} return true to visit the each prop of the value recursively
+   */
+  function defaultVisitor(value, key, path) {
+    let arr = value;
+
+    if (utils.isReactNative(formData) && utils.isReactNativeBlob(value)) {
+      formData.append(renderKey(path, key, dots), convertValue(value));
+      return false;
+    }
+
+    if (value && !path && typeof value === 'object') {
+      if (utils.endsWith(key, '{}')) {
+        // eslint-disable-next-line no-param-reassign
+        key = metaTokens ? key : key.slice(0, -2);
+        // eslint-disable-next-line no-param-reassign
+        value = JSON.stringify(value);
+      } else if (
+        (utils.isArray(value) && isFlatArray(value)) ||
+        ((utils.isFileList(value) || utils.endsWith(key, '[]')) && (arr = utils.toArray(value)))
+      ) {
+        // eslint-disable-next-line no-param-reassign
+        key = removeBrackets(key);
+
+        arr.forEach(function each(el, index) {
+          !(utils.isUndefined(el) || el === null) &&
+            formData.append(
+              // eslint-disable-next-line no-nested-ternary
+              indexes === true
+                ? renderKey([key], index, dots)
+                : indexes === null
+                  ? key
+                  : key + '[]',
+              convertValue(el)
+            );
+        });
+        return false;
+      }
+    }
+
+    if (isVisitable(value)) {
+      return true;
+    }
+
+    formData.append(renderKey(path, key, dots), convertValue(value));
+
+    return false;
+  }
+
+  const stack = [];
+
+  const exposedHelpers = Object.assign(predicates, {
+    defaultVisitor,
+    convertValue,
+    isVisitable,
+  });
+
+  function build(value, path) {
+    if (utils.isUndefined(value)) return;
+
+    if (stack.indexOf(value) !== -1) {
+      throw Error('Circular reference detected in ' + path.join('.'));
+    }
+
+    stack.push(value);
+
+    utils.forEach(value, function each(el, key) {
+      const result =
+        !(utils.isUndefined(el) || el === null) &&
+        visitor.call(formData, el, utils.isString(key) ? key.trim() : key, path, exposedHelpers);
+
+      if (result === true) {
+        build(el, path ? path.concat(key) : [key]);
+      }
+    });
+
+    stack.pop();
+  }
+
+  if (!utils.isObject(obj)) {
+    throw new TypeError('data must be an object');
+  }
+
+  build(obj);
+
+  return formData;
+}
+
+export default toFormData;

extracted-source/node_modules/axios/lib/helpers/toURLEncodedForm.js

@@ -0,0 +1,19 @@
+'use strict';
+
+import utils from '../utils.js';
+import toFormData from './toFormData.js';
+import platform from '../platform/index.js';
+
+export default function toURLEncodedForm(data, options) {
+  return toFormData(data, new platform.classes.URLSearchParams(), {
+    visitor: function (value, key, path, helpers) {
+      if (platform.isNode && utils.isBuffer(value)) {
+        this.append(key, value.toString('base64'));
+        return false;
+      }
+
+      return helpers.defaultVisitor.apply(this, arguments);
+    },
+    ...options,
+  });
+}

extracted-source/node_modules/axios/lib/helpers/trackStream.js

@@ -0,0 +1,89 @@
+export const streamChunk = function* (chunk, chunkSize) {
+  let len = chunk.byteLength;
+
+  if (!chunkSize || len < chunkSize) {
+    yield chunk;
+    return;
+  }
+
+  let pos = 0;
+  let end;
+
+  while (pos < len) {
+    end = pos + chunkSize;
+    yield chunk.slice(pos, end);
+    pos = end;
+  }
+};
+
+export const readBytes = async function* (iterable, chunkSize) {
+  for await (const chunk of readStream(iterable)) {
+    yield* streamChunk(chunk, chunkSize);
+  }
+};
+
+const readStream = async function* (stream) {
+  if (stream[Symbol.asyncIterator]) {
+    yield* stream;
+    return;
+  }
+
+  const reader = stream.getReader();
+  try {
+    for (;;) {
+      const { done, value } = await reader.read();
+      if (done) {
+        break;
+      }
+      yield value;
+    }
+  } finally {
+    await reader.cancel();
+  }
+};
+
+export const trackStream = (stream, chunkSize, onProgress, onFinish) => {
+  const iterator = readBytes(stream, chunkSize);
+
+  let bytes = 0;
+  let done;
+  let _onFinish = (e) => {
+    if (!done) {
+      done = true;
+      onFinish && onFinish(e);
+    }
+  };
+
+  return new ReadableStream(
+    {
+      async pull(controller) {
+        try {
+          const { done, value } = await iterator.next();
+
+          if (done) {
+            _onFinish();
+            controller.close();
+            return;
+          }
+
+          let len = value.byteLength;
+          if (onProgress) {
+            let loadedBytes = (bytes += len);
+            onProgress(loadedBytes);
+          }
+          controller.enqueue(new Uint8Array(value));
+        } catch (err) {
+          _onFinish(err);
+          throw err;
+        }
+      },
+      cancel(reason) {
+        _onFinish(reason);
+        return iterator.return();
+      },
+    },
+    {
+      highWaterMark: 2,
+    }
+  );
+};

extracted-source/node_modules/axios/lib/helpers/validator.js

@@ -0,0 +1,110 @@
+'use strict';
+
+import { VERSION } from '../env/data.js';
+import AxiosError from '../core/AxiosError.js';
+
+const validators = {};
+
+// eslint-disable-next-line func-names
+['object', 'boolean', 'number', 'function', 'string', 'symbol'].forEach((type, i) => {
+  validators[type] = function validator(thing) {
+    return typeof thing === type || 'a' + (i < 1 ? 'n ' : ' ') + type;
+  };
+});
+
+const deprecatedWarnings = {};
+
+/**
+ * Transitional option validator
+ *
+ * @param {function|boolean?} validator - set to false if the transitional option has been removed
+ * @param {string?} version - deprecated version / removed since version
+ * @param {string?} message - some message with additional info
+ *
+ * @returns {function}
+ */
+validators.transitional = function transitional(validator, version, message) {
+  function formatMessage(opt, desc) {
+    return (
+      '[Axios v' +
+      VERSION +
+      "] Transitional option '" +
+      opt +
+      "'" +
+      desc +
+      (message ? '. ' + message : '')
+    );
+  }
+
+  // eslint-disable-next-line func-names
+  return (value, opt, opts) => {
+    if (validator === false) {
+      throw new AxiosError(
+        formatMessage(opt, ' has been removed' + (version ? ' in ' + version : '')),
+        AxiosError.ERR_DEPRECATED
+      );
+    }
+
+    if (version && !deprecatedWarnings[opt]) {
+      deprecatedWarnings[opt] = true;
+      // eslint-disable-next-line no-console
+      console.warn(
+        formatMessage(
+          opt,
+          ' has been deprecated since v' + version + ' and will be removed in the near future'
+        )
+      );
+    }
+
+    return validator ? validator(value, opt, opts) : true;
+  };
+};
+
+validators.spelling = function spelling(correctSpelling) {
+  return (value, opt) => {
+    // eslint-disable-next-line no-console
+    console.warn(`${opt} is likely a misspelling of ${correctSpelling}`);
+    return true;
+  };
+};
+
+/**
+ * Assert object's properties type
+ *
+ * @param {object} options
+ * @param {object} schema
+ * @param {boolean?} allowUnknown
+ *
+ * @returns {object}
+ */
+
+function assertOptions(options, schema, allowUnknown) {
+  if (typeof options !== 'object') {
+    throw new AxiosError('options must be an object', AxiosError.ERR_BAD_OPTION_VALUE);
+  }
+  const keys = Object.keys(options);
+  let i = keys.length;
+  while (i-- > 0) {
+    const opt = keys[i];
+    const validator = schema[opt];
+    if (validator) {
+      const value = options[opt];
+      const result = value === undefined || validator(value, opt, options);
+      if (result !== true) {
+        throw new AxiosError(
+          'option ' + opt + ' must be ' + result,
+          AxiosError.ERR_BAD_OPTION_VALUE
+        );
+      }
+      continue;
+    }
+    if (allowUnknown !== true) {
+      throw new AxiosError('Unknown option ' + opt, AxiosError.ERR_BAD_OPTION);
+    }
+  }
+}
+
+export default {
+  assertOptions,
+  validators,
+};