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diff --git a/middleware/node_modules/axios/README.md b/middleware/node_modules/axios/README.md new file mode 100755 index 0000000..66906d8 --- /dev/null +++ b/middleware/node_modules/axios/README.md @@ -0,0 +1,991 @@ +# axios + +[](https://www.npmjs.org/package/axios) +[](https://cdnjs.com/libraries/axios) + +[](https://gitpod.io/#https://github.com/axios/axios) +[](https://coveralls.io/r/mzabriskie/axios) +[](https://packagephobia.now.sh/result?p=axios) +[](http://npm-stat.com/charts.html?package=axios) +[](https://gitter.im/mzabriskie/axios) +[](https://www.codetriage.com/axios/axios) +[](https://snyk.io/test/npm/axios) + +Promise based HTTP client for the browser and node.js + +> New axios docs website: [click here](https://axios-http.com/) + +## Table of Contents + + - [Features](#features) + - [Browser Support](#browser-support) + - [Installing](#installing) + - [Example](#example) + - [Axios API](#axios-api) + - [Request method aliases](#request-method-aliases) + - [Concurrency π](#concurrency-deprecated) + - [Creating an instance](#creating-an-instance) + - [Instance methods](#instance-methods) + - [Request Config](#request-config) + - [Response Schema](#response-schema) + - [Config Defaults](#config-defaults) + - [Global axios defaults](#global-axios-defaults) + - [Custom instance defaults](#custom-instance-defaults) + - [Config order of precedence](#config-order-of-precedence) + - [Interceptors](#interceptors) + - [Multiple Interceptors](#multiple-interceptors) + - [Handling Errors](#handling-errors) + - [Cancellation](#cancellation) + - [AbortController](#abortcontroller) + - [CancelToken π](#canceltoken-deprecated) + - [Using application/x-www-form-urlencoded format](#using-applicationx-www-form-urlencoded-format) + - [Browser](#browser) + - [Node.js](#nodejs) + - [Query string](#query-string) + - [Form data](#form-data) + - [Automatic serialization](#-automatic-serialization) + - [Manual FormData passing](#manual-formdata-passing) + - [Semver](#semver) + - [Promises](#promises) + - [TypeScript](#typescript) + - [Resources](#resources) + - [Credits](#credits) + - [License](#license) + +## Features + +- Make [XMLHttpRequests](https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest) from the browser +- Make [http](http://nodejs.org/api/http.html) requests from node.js +- Supports the [Promise](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise) API +- Intercept request and response +- Transform request and response data +- Cancel requests +- Automatic transforms for JSON data +- Client side support for protecting against [XSRF](http://en.wikipedia.org/wiki/Cross-site_request_forgery) + +## Browser Support + + |  |  |  |  |  | +--- | --- | --- | --- | --- | --- | +Latest β | Latest β | Latest β | Latest β | Latest β | 11 β | + +[](https://saucelabs.com/u/axios) + +## Installing + +Using npm: + +```bash +$ npm install axios +``` + +Using bower: + +```bash +$ bower install axios +``` + +Using yarn: + +```bash +$ yarn add axios +``` + +Using jsDelivr CDN: + +```html +<script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script> +``` + +Using unpkg CDN: + +```html +<script src="https://unpkg.com/axios/dist/axios.min.js"></script> +``` + +## Example + +### note: CommonJS usage +In order to gain the TypeScript typings (for intellisense / autocomplete) while using CommonJS imports with `require()` use the following approach: + +```js +const axios = require('axios').default; + +// axios.<method> will now provide autocomplete and parameter typings +``` + +Performing a `GET` request + +```js +const axios = require('axios').default; + +// Make a request for a user with a given ID +axios.get('/user?ID=12345') + .then(function (response) { + // handle success + console.log(response); + }) + .catch(function (error) { + // handle error + console.log(error); + }) + .then(function () { + // always executed + }); + +// Optionally the request above could also be done as +axios.get('/user', { + params: { + ID: 12345 + } + }) + .then(function (response) { + console.log(response); + }) + .catch(function (error) { + console.log(error); + }) + .then(function () { + // always executed + }); + +// Want to use async/await? Add the `async` keyword to your outer function/method. +async function getUser() { + try { + const response = await axios.get('/user?ID=12345'); + console.log(response); + } catch (error) { + console.error(error); + } +} +``` + +> **NOTE:** `async/await` is part of ECMAScript 2017 and is not supported in Internet +> Explorer and older browsers, so use with caution. + +Performing a `POST` request + +```js +axios.post('/user', { + firstName: 'Fred', + lastName: 'Flintstone' + }) + .then(function (response) { + console.log(response); + }) + .catch(function (error) { + console.log(error); + }); +``` + +Performing multiple concurrent requests + +```js +function getUserAccount() { + return axios.get('/user/12345'); +} + +function getUserPermissions() { + return axios.get('/user/12345/permissions'); +} + +Promise.all([getUserAccount(), getUserPermissions()]) + .then(function (results) { + const acct = results[0]; + const perm = results[1]; + }); +``` + +## axios API + +Requests can be made by passing the relevant config to `axios`. + +##### axios(config) + +```js +// Send a POST request +axios({ + method: 'post', + url: '/user/12345', + data: { + firstName: 'Fred', + lastName: 'Flintstone' + } +}); +``` + +```js +// GET request for remote image in node.js +axios({ + method: 'get', + url: 'http://bit.ly/2mTM3nY', + responseType: 'stream' +}) + .then(function (response) { + response.data.pipe(fs.createWriteStream('ada_lovelace.jpg')) + }); +``` + +##### axios(url[, config]) + +```js +// Send a GET request (default method) +axios('/user/12345'); +``` + +### Request method aliases + +For convenience, aliases have been provided for all common request methods. + +##### axios.request(config) +##### axios.get(url[, config]) +##### axios.delete(url[, config]) +##### axios.head(url[, config]) +##### axios.options(url[, config]) +##### axios.post(url[, data[, config]]) +##### axios.put(url[, data[, config]]) +##### axios.patch(url[, data[, config]]) + +###### NOTE +When using the alias methods `url`, `method`, and `data` properties don't need to be specified in config. + +### Concurrency (Deprecated) +Please use `Promise.all` to replace the below functions. + +Helper functions for dealing with concurrent requests. + +axios.all(iterable) +axios.spread(callback) + +### Creating an instance + +You can create a new instance of axios with a custom config. + +##### axios.create([config]) + +```js +const instance = axios.create({ + baseURL: 'https://some-domain.com/api/', + timeout: 1000, + headers: {'X-Custom-Header': 'foobar'} +}); +``` + +### Instance methods + +The available instance methods are listed below. The specified config will be merged with the instance config. + +##### axios#request(config) +##### axios#get(url[, config]) +##### axios#delete(url[, config]) +##### axios#head(url[, config]) +##### axios#options(url[, config]) +##### axios#post(url[, data[, config]]) +##### axios#put(url[, data[, config]]) +##### axios#patch(url[, data[, config]]) +##### axios#getUri([config]) + +## Request Config + +These are the available config options for making requests. Only the `url` is required. Requests will default to `GET` if `method` is not specified. + +```js +{ + // `url` is the server URL that will be used for the request + url: '/user', + + // `method` is the request method to be used when making the request + method: 'get', // default + + // `baseURL` will be prepended to `url` unless `url` is absolute. + // It can be convenient to set `baseURL` for an instance of axios to pass relative URLs + // to methods of that instance. + baseURL: 'https://some-domain.com/api/', + + // `transformRequest` allows changes to the request data before it is sent to the server + // This is only applicable for request methods 'PUT', 'POST', 'PATCH' and 'DELETE' + // The last function in the array must return a string or an instance of Buffer, ArrayBuffer, + // FormData or Stream + // You may modify the headers object. + transformRequest: [function (data, headers) { + // Do whatever you want to transform the data + + return data; + }], + + // `transformResponse` allows changes to the response data to be made before + // it is passed to then/catch + transformResponse: [function (data) { + // Do whatever you want to transform the data + + return data; + }], + + // `headers` are custom headers to be sent + headers: {'X-Requested-With': 'XMLHttpRequest'}, + + // `params` are the URL parameters to be sent with the request + // Must be a plain object or a URLSearchParams object + params: { + ID: 12345 + }, + + // `paramsSerializer` is an optional function in charge of serializing `params` + // (e.g. https://www.npmjs.com/package/qs, http://api.jquery.com/jquery.param/) + paramsSerializer: function (params) { + return Qs.stringify(params, {arrayFormat: 'brackets'}) + }, + + // `data` is the data to be sent as the request body + // Only applicable for request methods 'PUT', 'POST', 'DELETE , and 'PATCH' + // When no `transformRequest` is set, must be of one of the following types: + // - string, plain object, ArrayBuffer, ArrayBufferView, URLSearchParams + // - Browser only: FormData, File, Blob + // - Node only: Stream, Buffer + data: { + firstName: 'Fred' + }, + + // syntax alternative to send data into the body + // method post + // only the value is sent, not the key + data: 'Country=Brasil&City=Belo Horizonte', + + // `timeout` specifies the number of milliseconds before the request times out. + // If the request takes longer than `timeout`, the request will be aborted. + timeout: 1000, // default is `0` (no timeout) + + // `withCredentials` indicates whether or not cross-site Access-Control requests + // should be made using credentials + withCredentials: false, // default + + // `adapter` allows custom handling of requests which makes testing easier. + // Return a promise and supply a valid response (see lib/adapters/README.md). + adapter: function (config) { + /* ... */ + }, + + // `auth` indicates that HTTP Basic auth should be used, and supplies credentials. + // This will set an `Authorization` header, overwriting any existing + // `Authorization` custom headers you have set using `headers`. + // Please note that only HTTP Basic auth is configurable through this parameter. + // For Bearer tokens and such, use `Authorization` custom headers instead. + auth: { + username: 'janedoe', + password: 's00pers3cret' + }, + + // `responseType` indicates the type of data that the server will respond with + // options are: 'arraybuffer', 'document', 'json', 'text', 'stream' + // browser only: 'blob' + responseType: 'json', // default + + // `responseEncoding` indicates encoding to use for decoding responses (Node.js only) + // Note: Ignored for `responseType` of 'stream' or client-side requests + responseEncoding: 'utf8', // default + + // `xsrfCookieName` is the name of the cookie to use as a value for xsrf token + xsrfCookieName: 'XSRF-TOKEN', // default + + // `xsrfHeaderName` is the name of the http header that carries the xsrf token value + xsrfHeaderName: 'X-XSRF-TOKEN', // default + + // `onUploadProgress` allows handling of progress events for uploads + // browser only + onUploadProgress: function (progressEvent) { + // Do whatever you want with the native progress event + }, + + // `onDownloadProgress` allows handling of progress events for downloads + // browser only + onDownloadProgress: function (progressEvent) { + // Do whatever you want with the native progress event + }, + + // `maxContentLength` defines the max size of the http response content in bytes allowed in node.js + maxContentLength: 2000, + + // `maxBodyLength` (Node only option) defines the max size of the http request content in bytes allowed + maxBodyLength: 2000, + + // `validateStatus` defines whether to resolve or reject the promise for a given + // HTTP response status code. If `validateStatus` returns `true` (or is set to `null` + // or `undefined`), the promise will be resolved; otherwise, the promise will be + // rejected. + validateStatus: function (status) { + return status >= 200 && status < 300; // default + }, + + // `maxRedirects` defines the maximum number of redirects to follow in node.js. + // If set to 0, no redirects will be followed. + maxRedirects: 21, // default + + // `beforeRedirect` defines a function that will be called before redirect. + // Use this to adjust the request options upon redirecting, + // to inspect the latest response headers, + // or to cancel the request by throwing an error + // If maxRedirects is set to 0, `beforeRedirect` is not used. + beforeRedirect: (options, { headers }) => { + if (options.hostname === "example.com") { + options.auth = "user:password"; + } + }; + + // `socketPath` defines a UNIX Socket to be used in node.js. + // e.g. '/var/run/docker.sock' to send requests to the docker daemon. + // Only either `socketPath` or `proxy` can be specified. + // If both are specified, `socketPath` is used. + socketPath: null, // default + + // `httpAgent` and `httpsAgent` define a custom agent to be used when performing http + // and https requests, respectively, in node.js. This allows options to be added like + // `keepAlive` that are not enabled by default. + httpAgent: new http.Agent({ keepAlive: true }), + httpsAgent: new https.Agent({ keepAlive: true }), + + // `proxy` defines the hostname, port, and protocol of the proxy server. + // You can also define your proxy using the conventional `http_proxy` and + // `https_proxy` environment variables. If you are using environment variables + // for your proxy configuration, you can also define a `no_proxy` environment + // variable as a comma-separated list of domains that should not be proxied. + // Use `false` to disable proxies, ignoring environment variables. + // `auth` indicates that HTTP Basic auth should be used to connect to the proxy, and + // supplies credentials. + // This will set an `Proxy-Authorization` header, overwriting any existing + // `Proxy-Authorization` custom headers you have set using `headers`. + // If the proxy server uses HTTPS, then you must set the protocol to `https`. + proxy: { + protocol: 'https', + host: '127.0.0.1', + port: 9000, + auth: { + username: 'mikeymike', + password: 'rapunz3l' + } + }, + + // `cancelToken` specifies a cancel token that can be used to cancel the request + // (see Cancellation section below for details) + cancelToken: new CancelToken(function (cancel) { + }), + + // an alternative way to cancel Axios requests using AbortController + signal: new AbortController().signal, + + // `decompress` indicates whether or not the response body should be decompressed + // automatically. If set to `true` will also remove the 'content-encoding' header + // from the responses objects of all decompressed responses + // - Node only (XHR cannot turn off decompression) + decompress: true // default + + // `insecureHTTPParser` boolean. + // Indicates where to use an insecure HTTP parser that accepts invalid HTTP headers. + // This may allow interoperability with non-conformant HTTP implementations. + // Using the insecure parser should be avoided. + // see options https://nodejs.org/dist/latest-v12.x/docs/api/http.html#http_http_request_url_options_callback + // see also https://nodejs.org/en/blog/vulnerability/february-2020-security-releases/#strict-http-header-parsing-none + insecureHTTPParser: undefined // default + + // transitional options for backward compatibility that may be removed in the newer versions + transitional: { + // silent JSON parsing mode + // `true` - ignore JSON parsing errors and set response.data to null if parsing failed (old behaviour) + // `false` - throw SyntaxError if JSON parsing failed (Note: responseType must be set to 'json') + silentJSONParsing: true, // default value for the current Axios version + + // try to parse the response string as JSON even if `responseType` is not 'json' + forcedJSONParsing: true, + + // throw ETIMEDOUT error instead of generic ECONNABORTED on request timeouts + clarifyTimeoutError: false, + }, + + env: { + // The FormData class to be used to automatically serialize the payload into a FormData object + FormData: window?.FormData || global?.FormData + } +} +``` + +## Response Schema + +The response for a request contains the following information. + +```js +{ + // `data` is the response that was provided by the server + data: {}, + + // `status` is the HTTP status code from the server response + status: 200, + + // `statusText` is the HTTP status message from the server response + statusText: 'OK', + + // `headers` the HTTP headers that the server responded with + // All header names are lower cased and can be accessed using the bracket notation. + // Example: `response.headers['content-type']` + headers: {}, + + // `config` is the config that was provided to `axios` for the request + config: {}, + + // `request` is the request that generated this response + // It is the last ClientRequest instance in node.js (in redirects) + // and an XMLHttpRequest instance in the browser + request: {} +} +``` + +When using `then`, you will receive the response as follows: + +```js +axios.get('/user/12345') + .then(function (response) { + console.log(response.data); + console.log(response.status); + console.log(response.statusText); + console.log(response.headers); + console.log(response.config); + }); +``` + +When using `catch`, or passing a [rejection callback](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/then) as second parameter of `then`, the response will be available through the `error` object as explained in the [Handling Errors](#handling-errors) section. + +## Config Defaults + +You can specify config defaults that will be applied to every request. + +### Global axios defaults + +```js +axios.defaults.baseURL = 'https://api.example.com'; + +// Important: If axios is used with multiple domains, the AUTH_TOKEN will be sent to all of them. +// See below for an example using Custom instance defaults instead. +axios.defaults.headers.common['Authorization'] = AUTH_TOKEN; + +axios.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded'; +``` + +### Custom instance defaults + +```js +// Set config defaults when creating the instance +const instance = axios.create({ + baseURL: 'https://api.example.com' +}); + +// Alter defaults after instance has been created +instance.defaults.headers.common['Authorization'] = AUTH_TOKEN; +``` + +### Config order of precedence + +Config will be merged with an order of precedence. The order is library defaults found in [lib/defaults.js](https://github.com/axios/axios/blob/master/lib/defaults.js#L28), then `defaults` property of the instance, and finally `config` argument for the request. The latter will take precedence over the former. Here's an example. + +```js +// Create an instance using the config defaults provided by the library +// At this point the timeout config value is `0` as is the default for the library +const instance = axios.create(); + +// Override timeout default for the library +// Now all requests using this instance will wait 2.5 seconds before timing out +instance.defaults.timeout = 2500; + +// Override timeout for this request as it's known to take a long time +instance.get('/longRequest', { + timeout: 5000 +}); +``` + +## Interceptors + +You can intercept requests or responses before they are handled by `then` or `catch`. + +```js +// Add a request interceptor +axios.interceptors.request.use(function (config) { + // Do something before request is sent + return config; + }, function (error) { + // Do something with request error + return Promise.reject(error); + }); + +// Add a response interceptor +axios.interceptors.response.use(function (response) { + // Any status code that lie within the range of 2xx cause this function to trigger + // Do something with response data + return response; + }, function (error) { + // Any status codes that falls outside the range of 2xx cause this function to trigger + // Do something with response error + return Promise.reject(error); + }); +``` + +If you need to remove an interceptor later you can. + +```js +const myInterceptor = axios.interceptors.request.use(function () {/*...*/}); +axios.interceptors.request.eject(myInterceptor); +``` + +You can add interceptors to a custom instance of axios. + +```js +const instance = axios.create(); +instance.interceptors.request.use(function () {/*...*/}); +``` + +When you add request interceptors, they are presumed to be asynchronous by default. This can cause a delay +in the execution of your axios request when the main thread is blocked (a promise is created under the hood for +the interceptor and your request gets put on the bottom of the call stack). If your request interceptors are synchronous you can add a flag +to the options object that will tell axios to run the code synchronously and avoid any delays in request execution. + +```js +axios.interceptors.request.use(function (config) { + config.headers.test = 'I am only a header!'; + return config; +}, null, { synchronous: true }); +``` + +If you want to execute a particular interceptor based on a runtime check, +you can add a `runWhen` function to the options object. The interceptor will not be executed **if and only if** the return +of `runWhen` is `false`. The function will be called with the config +object (don't forget that you can bind your own arguments to it as well.) This can be handy when you have an +asynchronous request interceptor that only needs to run at certain times. + +```js +function onGetCall(config) { + return config.method === 'get'; +} +axios.interceptors.request.use(function (config) { + config.headers.test = 'special get headers'; + return config; +}, null, { runWhen: onGetCall }); +``` + +### Multiple Interceptors + +Given you add multiple response interceptors +and when the response was fulfilled +- then each interceptor is executed +- then they are executed in the order they were added +- then only the last interceptor's result is returned +- then every interceptor receives the result of it's predecessor +- and when the fulfillment-interceptor throws + - then the following fulfillment-interceptor is not called + - then the following rejection-interceptor is called + - once caught, another following fulfill-interceptor is called again (just like in a promise chain). + +Read [the interceptor tests](./test/specs/interceptors.spec.js) for seeing all this in code. + +## Handling Errors + +```js +axios.get('/user/12345') + .catch(function (error) { + if (error.response) { + // The request was made and the server responded with a status code + // that falls out of the range of 2xx + console.log(error.response.data); + console.log(error.response.status); + console.log(error.response.headers); + } else if (error.request) { + // The request was made but no response was received + // `error.request` is an instance of XMLHttpRequest in the browser and an instance of + // http.ClientRequest in node.js + console.log(error.request); + } else { + // Something happened in setting up the request that triggered an Error + console.log('Error', error.message); + } + console.log(error.config); + }); +``` + +Using the `validateStatus` config option, you can define HTTP code(s) that should throw an error. + +```js +axios.get('/user/12345', { + validateStatus: function (status) { + return status < 500; // Resolve only if the status code is less than 500 + } +}) +``` + +Using `toJSON` you get an object with more information about the HTTP error. + +```js +axios.get('/user/12345') + .catch(function (error) { + console.log(error.toJSON()); + }); +``` + +## Cancellation + +### AbortController + +Starting from `v0.22.0` Axios supports AbortController to cancel requests in fetch API way: + +```js +const controller = new AbortController(); + +axios.get('/foo/bar', { + signal: controller.signal +}).then(function(response) { + //... +}); +// cancel the request +controller.abort() +``` + +### CancelToken `πdeprecated` + +You can also cancel a request using a *CancelToken*. + +> The axios cancel token API is based on the withdrawn [cancelable promises proposal](https://github.com/tc39/proposal-cancelable-promises). + +> This API is deprecated since v0.22.0 and shouldn't be used in new projects + +You can create a cancel token using the `CancelToken.source` factory as shown below: + +```js +const CancelToken = axios.CancelToken; +const source = CancelToken.source(); + +axios.get('/user/12345', { + cancelToken: source.token +}).catch(function (thrown) { + if (axios.isCancel(thrown)) { + console.log('Request canceled', thrown.message); + } else { + // handle error + } +}); + +axios.post('/user/12345', { + name: 'new name' +}, { + cancelToken: source.token +}) + +// cancel the request (the message parameter is optional) +source.cancel('Operation canceled by the user.'); +``` + +You can also create a cancel token by passing an executor function to the `CancelToken` constructor: + +```js +const CancelToken = axios.CancelToken; +let cancel; + +axios.get('/user/12345', { + cancelToken: new CancelToken(function executor(c) { + // An executor function receives a cancel function as a parameter + cancel = c; + }) +}); + +// cancel the request +cancel(); +``` + +> Note: you can cancel several requests with the same cancel token/abort controller. +> If a cancellation token is already cancelled at the moment of starting an Axios request, then the request is cancelled immediately, without any attempts to make real request. + +> During the transition period, you can use both cancellation APIs, even for the same request: + +## Using application/x-www-form-urlencoded format + +By default, axios serializes JavaScript objects to `JSON`. To send data in the `application/x-www-form-urlencoded` format instead, you can use one of the following options. + +### Browser + +In a browser, you can use the [`URLSearchParams`](https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams) API as follows: + +```js +const params = new URLSearchParams(); +params.append('param1', 'value1'); +params.append('param2', 'value2'); +axios.post('/foo', params); +``` + +> Note that `URLSearchParams` is not supported by all browsers (see [caniuse.com](http://www.caniuse.com/#feat=urlsearchparams)), but there is a [polyfill](https://github.com/WebReflection/url-search-params) available (make sure to polyfill the global environment). + +Alternatively, you can encode data using the [`qs`](https://github.com/ljharb/qs) library: + +```js +const qs = require('qs'); +axios.post('/foo', qs.stringify({ 'bar': 123 })); +``` + +Or in another way (ES6), + +```js +import qs from 'qs'; +const data = { 'bar': 123 }; +const options = { + method: 'POST', + headers: { 'content-type': 'application/x-www-form-urlencoded' }, + data: qs.stringify(data), + url, +}; +axios(options); +``` + +### Node.js + +#### Query string + +In node.js, you can use the [`querystring`](https://nodejs.org/api/querystring.html) module as follows: + +```js +const querystring = require('querystring'); +axios.post('http://something.com/', querystring.stringify({ foo: 'bar' })); +``` + +or ['URLSearchParams'](https://nodejs.org/api/url.html#url_class_urlsearchparams) from ['url module'](https://nodejs.org/api/url.html) as follows: + +```js +const url = require('url'); +const params = new url.URLSearchParams({ foo: 'bar' }); +axios.post('http://something.com/', params.toString()); +``` + +You can also use the [`qs`](https://github.com/ljharb/qs) library. + +> NOTE: +> The `qs` library is preferable if you need to stringify nested objects, as the `querystring` method has [known issues](https://github.com/nodejs/node-v0.x-archive/issues/1665) with that use case. + +#### Form data + +##### π Automatic serialization + +Starting from `v0.27.0`, Axios supports automatic object serialization to a FormData object if the request `Content-Type` +header is set to `multipart/form-data`. + +The following request will submit the data in a FormData format (Browser & Node.js): + +```js +import axios from 'axios'; + +axios.post('https://httpbin.org/post', {x: 1}, { + headers: { + 'Content-Type': 'multipart/form-data' + } +}).then(({data})=> console.log(data)); +``` + +In the `node.js` build, the ([`form-data`](https://github.com/form-data/form-data)) polyfill is used by default. + +You can overload the FormData class by setting the `env.FormData` config variable, +but you probably won't need it in most cases: + +```js +const axios= require('axios'); +var FormData = require('form-data'); + +axios.post('https://httpbin.org/post', {x: 1, buf: new Buffer(10)}, { + headers: { + 'Content-Type': 'multipart/form-data' + } +}).then(({data})=> console.log(data)); +``` + +Axios FormData serializer supports some special endings to perform the following operations: + +- `{}` - serialize the value with JSON.stringify +- `[]` - unwrap the array like object as separate fields with the same key + +```js +const axios= require('axios'); + +axios.post('https://httpbin.org/post', { + 'myObj{}': {x: 1, s: "foo"}, + 'files[]': document.querySelector('#fileInput').files +}, { + headers: { + 'Content-Type': 'multipart/form-data' + } +}).then(({data})=> console.log(data)); +``` + +Axios supports the following shortcut methods: `postForm`, `putForm`, `patchForm` +which are just the corresponding http methods with a header preset: `Content-Type`: `multipart/form-data`. + +FileList object can be passed directly: + +```js +await axios.postForm('https://httpbin.org/post', document.querySelector('#fileInput').files) +``` + +All files will be sent with the same field names: `files[]`; + +##### Manual FormData passing + +In node.js, you can use the [`form-data`](https://github.com/form-data/form-data) library as follows: + +```js +const FormData = require('form-data'); + +const form = new FormData(); +form.append('my_field', 'my value'); +form.append('my_buffer', new Buffer(10)); +form.append('my_file', fs.createReadStream('/foo/bar.jpg')); + +axios.post('https://example.com', form) +``` + +## Semver + +Until axios reaches a `1.0` release, breaking changes will be released with a new minor version. For example `0.5.1`, and `0.5.4` will have the same API, but `0.6.0` will have breaking changes. + +## Promises + +axios depends on a native ES6 Promise implementation to be [supported](http://caniuse.com/promises). +If your environment doesn't support ES6 Promises, you can [polyfill](https://github.com/jakearchibald/es6-promise). + +## TypeScript + +axios includes [TypeScript](http://typescriptlang.org) definitions and a type guard for axios errors. + +```typescript +let user: User = null; +try { + const { data } = await axios.get('/user?ID=12345'); + user = data.userDetails; +} catch (error) { + if (axios.isAxiosError(error)) { + handleAxiosError(error); + } else { + handleUnexpectedError(error); + } +} +``` + +## Online one-click setup + +You can use Gitpod an online IDE(which is free for Open Source) for contributing or running the examples online. + +[](https://gitpod.io/#https://github.com/axios/axios/blob/master/examples/server.js) + + +## Resources + +* [Changelog](https://github.com/axios/axios/blob/master/CHANGELOG.md) +* [Upgrade Guide](https://github.com/axios/axios/blob/master/UPGRADE_GUIDE.md) +* [Ecosystem](https://github.com/axios/axios/blob/master/ECOSYSTEM.md) +* [Contributing Guide](https://github.com/axios/axios/blob/master/CONTRIBUTING.md) +* [Code of Conduct](https://github.com/axios/axios/blob/master/CODE_OF_CONDUCT.md) + +## Credits + +axios is heavily inspired by the [$http service](https://docs.angularjs.org/api/ng/service/$http) provided in [AngularJS](https://angularjs.org/). Ultimately axios is an effort to provide a standalone `$http`-like service for use outside of AngularJS. + +## License + +[MIT](LICENSE) |