4 files changed, 904 insertions, 0 deletions
diff --git a/school/node_modules/axios/lib/adapters/README.md b/school/node_modules/axios/lib/adapters/README.md
new file mode 100644
index 0000000..68f1118
--- /dev/null
+++ b/school/node_modules/axios/lib/adapters/README.md
@@ -0,0 +1,37 @@
+# axios // adapters
+
+The modules under `adapters/` are modules that handle dispatching a request and settling a returned `Promise` once a response is received.
+
+## Example
+
+```js
+var settle = require('./../core/settle');
+
+module.exports = function myAdapter(config) {
+  // At this point:
+  //  - config has been merged with defaults
+  //  - request transformers have already run
+  //  - request interceptors have already run
+  
+  // Make the request using config provided
+  // Upon response settle the Promise
+
+  return new Promise(function(resolve, reject) {
+  
+    var response = {
+      data: responseData,
+      status: request.status,
+      statusText: request.statusText,
+      headers: responseHeaders,
+      config: config,
+      request: request
+    };
+
+    settle(resolve, reject, response);
+
+    // From here:
+    //  - response transformers will run
+    //  - response interceptors will run
+  });
+}
+```
diff --git a/school/node_modules/axios/lib/adapters/http.js b/school/node_modules/axios/lib/adapters/http.js
new file mode 100755
index 0000000..35722b3
--- /dev/null
+++ b/school/node_modules/axios/lib/adapters/http.js
@@ -0,0 +1,588 @@
+'use strict';
+
+import utils from './../utils.js';
+import settle from './../core/settle.js';
+import buildFullPath from '../core/buildFullPath.js';
+import buildURL from './../helpers/buildURL.js';
+import {getProxyForUrl} from 'proxy-from-env';
+import http from 'http';
+import https from 'https';
+import followRedirects from 'follow-redirects';
+import zlib from 'zlib';
+import {VERSION} from '../env/data.js';
+import transitionalDefaults from '../defaults/transitional.js';
+import AxiosError from '../core/AxiosError.js';
+import CanceledError from '../cancel/CanceledError.js';
+import platform from '../platform/index.js';
+import fromDataURI from '../helpers/fromDataURI.js';
+import stream from 'stream';
+import AxiosHeaders from '../core/AxiosHeaders.js';
+import AxiosTransformStream from '../helpers/AxiosTransformStream.js';
+import EventEmitter from 'events';
+
+const isBrotliSupported = utils.isFunction(zlib.createBrotliDecompress);
+
+const {http: httpFollow, https: httpsFollow} = followRedirects;
+
+const isHttps = /https:?/;
+
+const supportedProtocols = platform.protocols.map(protocol => {
+  return protocol + ':';
+});
+
+/**
+ * If the proxy or config beforeRedirects functions are defined, call them with the options
+ * object.
+ *
+ * @param {Object<string, any>} options - The options object that was passed to the request.
+ *
+ * @returns {Object<string, any>}
+ */
+function dispatchBeforeRedirect(options) {
+  if (options.beforeRedirects.proxy) {
+    options.beforeRedirects.proxy(options);
+  }
+  if (options.beforeRedirects.config) {
+    options.beforeRedirects.config(options);
+  }
+}
+
+/**
+ * If the proxy or config afterRedirects functions are defined, call them with the options
+ *
+ * @param {http.ClientRequestArgs} options
+ * @param {AxiosProxyConfig} configProxy
+ * @param {string} location
+ *
+ * @returns {http.ClientRequestArgs}
+ */
+function setProxy(options, configProxy, location) {
+  let proxy = configProxy;
+  if (!proxy && proxy !== false) {
+    const proxyUrl = getProxyForUrl(location);
+    if (proxyUrl) {
+      proxy = new URL(proxyUrl);
+    }
+  }
+  if (proxy) {
+    // Basic proxy authorization
+    if (proxy.username) {
+      proxy.auth = (proxy.username || '') + ':' + (proxy.password || '');
+    }
+
+    if (proxy.auth) {
+      // Support proxy auth object form
+      if (proxy.auth.username || proxy.auth.password) {
+        proxy.auth = (proxy.auth.username || '') + ':' + (proxy.auth.password || '');
+      }
+      const base64 = Buffer
+        .from(proxy.auth, 'utf8')
+        .toString('base64');
+      options.headers['Proxy-Authorization'] = 'Basic ' + base64;
+    }
+
+    options.headers.host = options.hostname + (options.port ? ':' + options.port : '');
+    options.hostname = proxy.hostname;
+    // Replace 'host' since options is not a URL object
+    options.host = proxy.hostname;
+    options.port = proxy.port;
+    options.path = location;
+    if (proxy.protocol) {
+      options.protocol = proxy.protocol;
+    }
+  }
+
+  options.beforeRedirects.proxy = function beforeRedirect(redirectOptions) {
+    // Configure proxy for redirected request, passing the original config proxy to apply
+    // the exact same logic as if the redirected request was performed by axios directly.
+    setProxy(redirectOptions, configProxy, redirectOptions.href);
+  };
+}
+
+/*eslint consistent-return:0*/
+export default function httpAdapter(config) {
+  return new Promise(function dispatchHttpRequest(resolvePromise, rejectPromise) {
+    let data = config.data;
+    const responseType = config.responseType;
+    const responseEncoding = config.responseEncoding;
+    const method = config.method.toUpperCase();
+    let isFinished;
+    let isDone;
+    let rejected = false;
+    let req;
+
+    // temporary internal emitter until the AxiosRequest class will be implemented
+    const emitter = new EventEmitter();
+
+    function onFinished() {
+      if (isFinished) return;
+      isFinished = true;
+
+      if (config.cancelToken) {
+        config.cancelToken.unsubscribe(abort);
+      }
+
+      if (config.signal) {
+        config.signal.removeEventListener('abort', abort);
+      }
+
+      emitter.removeAllListeners();
+    }
+
+    function done(value, isRejected) {
+      if (isDone) return;
+
+      isDone = true;
+
+      if (isRejected) {
+        rejected = true;
+        onFinished();
+      }
+
+      isRejected ? rejectPromise(value) : resolvePromise(value);
+    }
+
+    const resolve = function resolve(value) {
+      done(value);
+    };
+
+    const reject = function reject(value) {
+      done(value, true);
+    };
+
+    function abort(reason) {
+      emitter.emit('abort', !reason || reason.type ? new CanceledError(null, config, req) : reason);
+    }
+
+    emitter.once('abort', reject);
+
+    if (config.cancelToken || config.signal) {
+      config.cancelToken && config.cancelToken.subscribe(abort);
+      if (config.signal) {
+        config.signal.aborted ? abort() : config.signal.addEventListener('abort', abort);
+      }
+    }
+
+    // Parse url
+    const fullPath = buildFullPath(config.baseURL, config.url);
+    const parsed = new URL(fullPath);
+    const protocol = parsed.protocol || supportedProtocols[0];
+
+    if (protocol === 'data:') {
+      let convertedData;
+
+      if (method !== 'GET') {
+        return settle(resolve, reject, {
+          status: 405,
+          statusText: 'method not allowed',
+          headers: {},
+          config
+        });
+      }
+
+      try {
+        convertedData = fromDataURI(config.url, responseType === 'blob', {
+          Blob: config.env && config.env.Blob
+        });
+      } catch (err) {
+        throw AxiosError.from(err, AxiosError.ERR_BAD_REQUEST, config);
+      }
+
+      if (responseType === 'text') {
+        convertedData = convertedData.toString(responseEncoding);
+
+        if (!responseEncoding || responseEncoding === 'utf8') {
+          data = utils.stripBOM(convertedData);
+        }
+      } else if (responseType === 'stream') {
+        convertedData = stream.Readable.from(convertedData);
+      }
+
+      return settle(resolve, reject, {
+        data: convertedData,
+        status: 200,
+        statusText: 'OK',
+        headers: {},
+        config
+      });
+    }
+
+    if (supportedProtocols.indexOf(protocol) === -1) {
+      return reject(new AxiosError(
+        'Unsupported protocol ' + protocol,
+        AxiosError.ERR_BAD_REQUEST,
+        config
+      ));
+    }
+
+    const headers = AxiosHeaders.from(config.headers).normalize();
+
+    // Set User-Agent (required by some servers)
+    // See https://github.com/axios/axios/issues/69
+    // User-Agent is specified; handle case where no UA header is desired
+    // Only set header if it hasn't been set in config
+    headers.set('User-Agent', 'axios/' + VERSION, false);
+
+    const onDownloadProgress = config.onDownloadProgress;
+    const onUploadProgress = config.onUploadProgress;
+    const maxRate = config.maxRate;
+    let maxUploadRate = undefined;
+    let maxDownloadRate = undefined;
+
+    // support for https://www.npmjs.com/package/form-data api
+    if (utils.isFormData(data) && utils.isFunction(data.getHeaders)) {
+      headers.set(data.getHeaders());
+    } else if (data && !utils.isStream(data)) {
+      if (Buffer.isBuffer(data)) {
+        // Nothing to do...
+      } else if (utils.isArrayBuffer(data)) {
+        data = Buffer.from(new Uint8Array(data));
+      } else if (utils.isString(data)) {
+        data = Buffer.from(data, 'utf-8');
+      } else {
+        return reject(new AxiosError(
+          'Data after transformation must be a string, an ArrayBuffer, a Buffer, or a Stream',
+          AxiosError.ERR_BAD_REQUEST,
+          config
+        ));
+      }
+
+      // Add Content-Length header if data exists
+      headers.set('Content-Length', data.length, false);
+
+      if (config.maxBodyLength > -1 && data.length > config.maxBodyLength) {
+        return reject(new AxiosError(
+          'Request body larger than maxBodyLength limit',
+          AxiosError.ERR_BAD_REQUEST,
+          config
+        ));
+      }
+    }
+
+    const contentLength = +headers.getContentLength();
+
+    if (utils.isArray(maxRate)) {
+      maxUploadRate = maxRate[0];
+      maxDownloadRate = maxRate[1];
+    } else {
+      maxUploadRate = maxDownloadRate = maxRate;
+    }
+
+    if (data && (onUploadProgress || maxUploadRate)) {
+      if (!utils.isStream(data)) {
+        data = stream.Readable.from(data, {objectMode: false});
+      }
+
+      data = stream.pipeline([data, new AxiosTransformStream({
+        length: utils.toFiniteNumber(contentLength),
+        maxRate: utils.toFiniteNumber(maxUploadRate)
+      })], utils.noop);
+
+      onUploadProgress && data.on('progress', progress => {
+        onUploadProgress(Object.assign(progress, {
+          upload: true
+        }));
+      });
+    }
+
+    // HTTP basic authentication
+    let auth = undefined;
+    if (config.auth) {
+      const username = config.auth.username || '';
+      const password = config.auth.password || '';
+      auth = username + ':' + password;
+    }
+
+    if (!auth && parsed.username) {
+      const urlUsername = parsed.username;
+      const urlPassword = parsed.password;
+      auth = urlUsername + ':' + urlPassword;
+    }
+
+    auth && headers.delete('authorization');
+
+    let path;
+
+    try {
+      path = buildURL(
+        parsed.pathname + parsed.search,
+        config.params,
+        config.paramsSerializer
+      ).replace(/^\?/, '');
+    } catch (err) {
+      const customErr = new Error(err.message);
+      customErr.config = config;
+      customErr.url = config.url;
+      customErr.exists = true;
+      return reject(customErr);
+    }
+
+    headers.set('Accept-Encoding', 'gzip, deflate, br', false);
+
+    const options = {
+      path,
+      method: method,
+      headers: headers.toJSON(),
+      agents: { http: config.httpAgent, https: config.httpsAgent },
+      auth,
+      protocol,
+      beforeRedirect: dispatchBeforeRedirect,
+      beforeRedirects: {}
+    };
+
+    if (config.socketPath) {
+      options.socketPath = config.socketPath;
+    } else {
+      options.hostname = parsed.hostname;
+      options.port = parsed.port;
+      setProxy(options, config.proxy, protocol + '//' + parsed.hostname + (parsed.port ? ':' + parsed.port : '') + options.path);
+    }
+
+    let transport;
+    const isHttpsRequest = isHttps.test(options.protocol);
+    options.agent = isHttpsRequest ? config.httpsAgent : config.httpAgent;
+    if (config.transport) {
+      transport = config.transport;
+    } else if (config.maxRedirects === 0) {
+      transport = isHttpsRequest ? https : http;
+    } else {
+      if (config.maxRedirects) {
+        options.maxRedirects = config.maxRedirects;
+      }
+      if (config.beforeRedirect) {
+        options.beforeRedirects.config = config.beforeRedirect;
+      }
+      transport = isHttpsRequest ? httpsFollow : httpFollow;
+    }
+
+    if (config.maxBodyLength > -1) {
+      options.maxBodyLength = config.maxBodyLength;
+    } else {
+      // follow-redirects does not skip comparison, so it should always succeed for axios -1 unlimited
+      options.maxBodyLength = Infinity;
+    }
+
+    if (config.insecureHTTPParser) {
+      options.insecureHTTPParser = config.insecureHTTPParser;
+    }
+
+    // Create the request
+    req = transport.request(options, function handleResponse(res) {
+      if (req.destroyed) return;
+
+      const streams = [res];
+
+      // uncompress the response body transparently if required
+      let responseStream = res;
+
+      // return the last request in case of redirects
+      const lastRequest = res.req || req;
+
+      // if decompress disabled we should not decompress
+      if (config.decompress !== false) {
+        // if no content, but headers still say that it is encoded,
+        // remove the header not confuse downstream operations
+        if (data && data.length === 0 && res.headers['content-encoding']) {
+          delete res.headers['content-encoding'];
+        }
+
+        switch (res.headers['content-encoding']) {
+        /*eslint default-case:0*/
+        case 'gzip':
+        case 'compress':
+        case 'deflate':
+          // add the unzipper to the body stream processing pipeline
+          streams.push(zlib.createUnzip());
+
+          // remove the content-encoding in order to not confuse downstream operations
+          delete res.headers['content-encoding'];
+          break;
+        case 'br':
+          if (isBrotliSupported) {
+            streams.push(zlib.createBrotliDecompress());
+            delete res.headers['content-encoding'];
+          }
+        }
+      }
+
+      if (onDownloadProgress) {
+        const responseLength = +res.headers['content-length'];
+
+        const transformStream = new AxiosTransformStream({
+          length: utils.toFiniteNumber(responseLength),
+          maxRate: utils.toFiniteNumber(maxDownloadRate)
+        });
+
+        onDownloadProgress && transformStream.on('progress', progress => {
+          onDownloadProgress(Object.assign(progress, {
+            download: true
+          }));
+        });
+
+        streams.push(transformStream);
+      }
+
+      responseStream = streams.length > 1 ? stream.pipeline(streams, utils.noop) : streams[0];
+
+      const offListeners = stream.finished(responseStream, () => {
+        offListeners();
+        onFinished();
+      });
+
+      const response = {
+        status: res.statusCode,
+        statusText: res.statusMessage,
+        headers: new AxiosHeaders(res.headers),
+        config,
+        request: lastRequest
+      };
+
+      if (responseType === 'stream') {
+        response.data = responseStream;
+        settle(resolve, reject, response);
+      } else {
+        const responseBuffer = [];
+        let totalResponseBytes = 0;
+
+        responseStream.on('data', function handleStreamData(chunk) {
+          responseBuffer.push(chunk);
+          totalResponseBytes += chunk.length;
+
+          // make sure the content length is not over the maxContentLength if specified
+          if (config.maxContentLength > -1 && totalResponseBytes > config.maxContentLength) {
+            // stream.destroy() emit aborted event before calling reject() on Node.js v16
+            rejected = true;
+            responseStream.destroy();
+            reject(new AxiosError('maxContentLength size of ' + config.maxContentLength + ' exceeded',
+              AxiosError.ERR_BAD_RESPONSE, config, lastRequest));
+          }
+        });
+
+        responseStream.on('aborted', function handlerStreamAborted() {
+          if (rejected) {
+            return;
+          }
+
+          const err = new AxiosError(
+            'maxContentLength size of ' + config.maxContentLength + ' exceeded',
+            AxiosError.ERR_BAD_RESPONSE,
+            config,
+            lastRequest
+          );
+          responseStream.destroy(err);
+          reject(err);
+        });
+
+        responseStream.on('error', function handleStreamError(err) {
+          if (req.destroyed) return;
+          reject(AxiosError.from(err, null, config, lastRequest));
+        });
+
+        responseStream.on('end', function handleStreamEnd() {
+          try {
+            let responseData = responseBuffer.length === 1 ? responseBuffer[0] : Buffer.concat(responseBuffer);
+            if (responseType !== 'arraybuffer') {
+              responseData = responseData.toString(responseEncoding);
+              if (!responseEncoding || responseEncoding === 'utf8') {
+                responseData = utils.stripBOM(responseData);
+              }
+            }
+            response.data = responseData;
+          } catch (err) {
+            reject(AxiosError.from(err, null, config, response.request, response));
+          }
+          settle(resolve, reject, response);
+        });
+      }
+
+      emitter.once('abort', err => {
+        if (!responseStream.destroyed) {
+          responseStream.emit('error', err);
+          responseStream.destroy();
+        }
+      });
+    });
+
+    emitter.once('abort', err => {
+      reject(err);
+      req.destroy(err);
+    });
+
+    // Handle errors
+    req.on('error', function handleRequestError(err) {
+      // @todo remove
+      // if (req.aborted && err.code !== AxiosError.ERR_FR_TOO_MANY_REDIRECTS) return;
+      reject(AxiosError.from(err, null, config, req));
+    });
+
+    // set tcp keep alive to prevent drop connection by peer
+    req.on('socket', function handleRequestSocket(socket) {
+      // default interval of sending ack packet is 1 minute
+      socket.setKeepAlive(true, 1000 * 60);
+    });
+
+    // Handle request timeout
+    if (config.timeout) {
+      // This is forcing a int timeout to avoid problems if the `req` interface doesn't handle other types.
+      const timeout = parseInt(config.timeout, 10);
+
+      if (isNaN(timeout)) {
+        reject(new AxiosError(
+          'error trying to parse `config.timeout` to int',
+          AxiosError.ERR_BAD_OPTION_VALUE,
+          config,
+          req
+        ));
+
+        return;
+      }
+
+      // Sometime, the response will be very slow, and does not respond, the connect event will be block by event loop system.
+      // And timer callback will be fired, and abort() will be invoked before connection, then get "socket hang up" and code ECONNRESET.
+      // At this time, if we have a large number of request, nodejs will hang up some socket on background. and the number will up and up.
+      // And then these socket which be hang up will devouring CPU little by little.
+      // ClientRequest.setTimeout will be fired on the specify milliseconds, and can make sure that abort() will be fired after connect.
+      req.setTimeout(timeout, function handleRequestTimeout() {
+        if (isDone) return;
+        let timeoutErrorMessage = config.timeout ? 'timeout of ' + config.timeout + 'ms exceeded' : 'timeout exceeded';
+        const transitional = config.transitional || transitionalDefaults;
+        if (config.timeoutErrorMessage) {
+          timeoutErrorMessage = config.timeoutErrorMessage;
+        }
+        reject(new AxiosError(
+          timeoutErrorMessage,
+          transitional.clarifyTimeoutError ? AxiosError.ETIMEDOUT : AxiosError.ECONNABORTED,
+          config,
+          req
+        ));
+        abort();
+      });
+    }
+
+
+    // Send the request
+    if (utils.isStream(data)) {
+      let ended = false;
+      let errored = false;
+
+      data.on('end', () => {
+        ended = true;
+      });
+
+      data.once('error', err => {
+        errored = true;
+        req.destroy(err);
+      });
+
+      data.on('close', () => {
+        if (!ended && !errored) {
+          abort(new CanceledError('Request stream has been aborted', config, req));
+        }
+      });
+
+      data.pipe(req);
+    } else {
+      req.end(data);
+    }
+  });
+}
diff --git a/school/node_modules/axios/lib/adapters/index.js b/school/node_modules/axios/lib/adapters/index.js
new file mode 100644
index 0000000..02ab126
--- /dev/null
+++ b/school/node_modules/axios/lib/adapters/index.js
@@ -0,0 +1,33 @@
+import utils from '../utils.js';
+import httpAdapter from './http.js';
+import xhrAdapter from './xhr.js';
+
+const adapters = {
+  http: httpAdapter,
+  xhr: xhrAdapter
+}
+
+export default {
+  getAdapter: (nameOrAdapter) => {
+    if(utils.isString(nameOrAdapter)){
+      const adapter = adapters[nameOrAdapter];
+
+      if (!nameOrAdapter) {
+        throw Error(
+          utils.hasOwnProp(nameOrAdapter) ?
+            `Adapter '${nameOrAdapter}' is not available in the build` :
+            `Can not resolve adapter '${nameOrAdapter}'`
+        );
+      }
+
+      return adapter
+    }
+
+    if (!utils.isFunction(nameOrAdapter)) {
+      throw new TypeError('adapter is not a function');
+    }
+
+    return nameOrAdapter;
+  },
+  adapters
+}
diff --git a/school/node_modules/axios/lib/adapters/xhr.js b/school/node_modules/axios/lib/adapters/xhr.js
new file mode 100644
index 0000000..e0233f5
--- /dev/null
+++ b/school/node_modules/axios/lib/adapters/xhr.js
@@ -0,0 +1,246 @@
+'use strict';
+
+import utils from './../utils.js';
+import settle from './../core/settle.js';
+import cookies from './../helpers/cookies.js';
+import buildURL from './../helpers/buildURL.js';
+import buildFullPath from '../core/buildFullPath.js';
+import isURLSameOrigin from './../helpers/isURLSameOrigin.js';
+import transitionalDefaults from '../defaults/transitional.js';
+import AxiosError from '../core/AxiosError.js';
+import CanceledError from '../cancel/CanceledError.js';
+import parseProtocol from '../helpers/parseProtocol.js';
+import platform from '../platform/index.js';
+import AxiosHeaders from '../core/AxiosHeaders.js';
+import speedometer from '../helpers/speedometer.js';
+
+function progressEventReducer(listener, isDownloadStream) {
+  let bytesNotified = 0;
+  const _speedometer = speedometer(50, 250);
+
+  return 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
+    };
+
+    data[isDownloadStream ? 'download' : 'upload'] = true;
+
+    listener(data);
+  };
+}
+
+export default function xhrAdapter(config) {
+  return new Promise(function dispatchXhrRequest(resolve, reject) {
+    let requestData = config.data;
+    const requestHeaders = AxiosHeaders.from(config.headers).normalize();
+    const responseType = config.responseType;
+    let onCanceled;
+    function done() {
+      if (config.cancelToken) {
+        config.cancelToken.unsubscribe(onCanceled);
+      }
+
+      if (config.signal) {
+        config.signal.removeEventListener('abort', onCanceled);
+      }
+    }
+
+    if (utils.isFormData(requestData) && platform.isStandardBrowserEnv) {
+      requestHeaders.setContentType(false); // Let the browser set it
+    }
+
+    let request = new XMLHttpRequest();
+
+    // HTTP basic authentication
+    if (config.auth) {
+      const username = config.auth.username || '';
+      const password = config.auth.password ? unescape(encodeURIComponent(config.auth.password)) : '';
+      requestHeaders.set('Authorization', 'Basic ' + btoa(username + ':' + password));
+    }
+
+    const fullPath = buildFullPath(config.baseURL, config.url);
+
+    request.open(config.method.toUpperCase(), buildURL(fullPath, config.params, config.paramsSerializer), true);
+
+    // Set the request timeout in MS
+    request.timeout = config.timeout;
+
+    function onloadend() {
+      if (!request) {
+        return;
+      }
+      // Prepare the response
+      const responseHeaders = AxiosHeaders.from(
+        'getAllResponseHeaders' in request && request.getAllResponseHeaders()
+      );
+      const responseData = !responseType || responseType === 'text' ||  responseType === 'json' ?
+        request.responseText : request.response;
+      const response = {
+        data: responseData,
+        status: request.status,
+        statusText: request.statusText,
+        headers: responseHeaders,
+        config,
+        request
+      };
+
+      settle(function _resolve(value) {
+        resolve(value);
+        done();
+      }, function _reject(err) {
+        reject(err);
+        done();
+      }, response);
+
+      // Clean up request
+      request = null;
+    }
+
+    if ('onloadend' in request) {
+      // Use onloadend if available
+      request.onloadend = onloadend;
+    } else {
+      // Listen for ready state to emulate onloadend
+      request.onreadystatechange = function handleLoad() {
+        if (!request || request.readyState !== 4) {
+          return;
+        }
+
+        // The request errored out and we didn't get a response, this will be
+        // handled by onerror instead
+        // With one exception: request that using file: protocol, most browsers
+        // will return status as 0 even though it's a successful request
+        if (request.status === 0 && !(request.responseURL && request.responseURL.indexOf('file:') === 0)) {
+          return;
+        }
+        // readystate handler is calling before onerror or ontimeout handlers,
+        // so we should call onloadend on the next 'tick'
+        setTimeout(onloadend);
+      };
+    }
+
+    // Handle browser request cancellation (as opposed to a manual cancellation)
+    request.onabort = function handleAbort() {
+      if (!request) {
+        return;
+      }
+
+      reject(new AxiosError('Request aborted', AxiosError.ECONNABORTED, config, request));
+
+      // Clean up request
+      request = null;
+    };
+
+    // Handle low level network errors
+    request.onerror = function handleError() {
+      // Real errors are hidden from us by the browser
+      // onerror should only fire if it's a network error
+      reject(new AxiosError('Network Error', AxiosError.ERR_NETWORK, config, request));
+
+      // Clean up request
+      request = null;
+    };
+
+    // Handle timeout
+    request.ontimeout = function handleTimeout() {
+      let timeoutErrorMessage = config.timeout ? 'timeout of ' + config.timeout + 'ms exceeded' : 'timeout exceeded';
+      const transitional = config.transitional || transitionalDefaults;
+      if (config.timeoutErrorMessage) {
+        timeoutErrorMessage = config.timeoutErrorMessage;
+      }
+      reject(new AxiosError(
+        timeoutErrorMessage,
+        transitional.clarifyTimeoutError ? AxiosError.ETIMEDOUT : AxiosError.ECONNABORTED,
+        config,
+        request));
+
+      // Clean up request
+      request = null;
+    };
+
+    // 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.isStandardBrowserEnv) {
+      // Add xsrf header
+      const xsrfValue = (config.withCredentials || isURLSameOrigin(fullPath))
+        && config.xsrfCookieName && cookies.read(config.xsrfCookieName);
+
+      if (xsrfValue) {
+        requestHeaders.set(config.xsrfHeaderName, xsrfValue);
+      }
+    }
+
+    // Remove Content-Type if data is undefined
+    requestData === undefined && requestHeaders.setContentType(null);
+
+    // Add headers to the request
+    if ('setRequestHeader' in request) {
+      utils.forEach(requestHeaders.toJSON(), function setRequestHeader(val, key) {
+        request.setRequestHeader(key, val);
+      });
+    }
+
+    // Add withCredentials to request if needed
+    if (!utils.isUndefined(config.withCredentials)) {
+      request.withCredentials = !!config.withCredentials;
+    }
+
+    // Add responseType to request if needed
+    if (responseType && responseType !== 'json') {
+      request.responseType = config.responseType;
+    }
+
+    // Handle progress if needed
+    if (typeof config.onDownloadProgress === 'function') {
+      request.addEventListener('progress', progressEventReducer(config.onDownloadProgress, true));
+    }
+
+    // Not all browsers support upload events
+    if (typeof config.onUploadProgress === 'function' && request.upload) {
+      request.upload.addEventListener('progress', progressEventReducer(config.onUploadProgress));
+    }
+
+    if (config.cancelToken || config.signal) {
+      // Handle cancellation
+      // eslint-disable-next-line func-names
+      onCanceled = cancel => {
+        if (!request) {
+          return;
+        }
+        reject(!cancel || cancel.type ? new CanceledError(null, config, request) : cancel);
+        request.abort();
+        request = null;
+      };
+
+      config.cancelToken && config.cancelToken.subscribe(onCanceled);
+      if (config.signal) {
+        config.signal.aborted ? onCanceled() : config.signal.addEventListener('abort', onCanceled);
+      }
+    }
+
+    const protocol = parseProtocol(fullPath);
+
+    if (protocol && platform.protocols.indexOf(protocol) === -1) {
+      reject(new AxiosError('Unsupported protocol ' + protocol + ':', AxiosError.ERR_BAD_REQUEST, config));
+      return;
+    }
+
+
+    // Send the request
+    request.send(requestData || null);
+  });
+}