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274 lines
10 KiB
Markdown
274 lines
10 KiB
Markdown
# superagent
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[](https://travis-ci.org/ladjs/superagent)
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[](https://codecov.io/gh/ladjs/superagent)
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[](https://github.com/sindresorhus/xo)
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[](https://github.com/prettier/prettier)
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[](https://lass.js.org)
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[](LICENSE)
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> Small progressive client-side HTTP request library, and Node.js module with the same API, supporting many high-level HTTP client features. Maintained for [Forward Email](https://github.com/forwardemail) and [Lad](https://github.com/ladjs).
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## Table of Contents
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* [Install](#install)
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* [Usage](#usage)
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* [Node](#node)
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* [Browser](#browser)
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* [Supported Platforms](#supported-platforms)
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* [Required Browser Features](#required-browser-features)
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* [Plugins](#plugins)
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* [Upgrading from previous versions](#upgrading-from-previous-versions)
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* [Contributors](#contributors)
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* [License](#license)
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## Install
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[npm][]:
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```sh
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npm install superagent
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```
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[yarn][]:
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```sh
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yarn add superagent
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```
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## Usage
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### Node
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```js
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const superagent = require('superagent');
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// callback
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superagent
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.post('/api/pet')
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.send({ name: 'Manny', species: 'cat' }) // sends a JSON post body
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.set('X-API-Key', 'foobar')
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.set('accept', 'json')
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.end((err, res) => {
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// Calling the end function will send the request
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});
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// promise with then/catch
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superagent.post('/api/pet').then(console.log).catch(console.error);
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// promise with async/await
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(async () => {
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try {
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const res = await superagent.post('/api/pet');
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console.log(res);
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} catch (err) {
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console.error(err);
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}
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})();
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```
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### Browser
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**The browser-ready, minified version of `superagent` is only 50 KB (minified and gzipped).**
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Browser-ready versions of this module are available via [jsdelivr][], [unpkg][], and also in the `node_modules/superagent/dist` folder in downloads of the `superagent` package.
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> Note that we also provide unminified versions with `.js` instead of `.min.js` file extensions.
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#### VanillaJS
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This is the solution for you if you're just using `<script>` tags everywhere!
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```html
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<script src="https://cdnjs.cloudflare.com/polyfill/v3/polyfill.min.js?features=WeakRef,BigInt"></script>
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<script src="https://cdn.jsdelivr.net/npm/superagent"></script>
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<!-- if you wish to use unpkg.com instead: -->
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<!-- <script src="https://unpkg.com/superagent"></script> -->
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<script type="text/javascript">
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(function() {
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// superagent is exposed as `window.superagent`
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// if you wish to use "request" instead please
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// uncomment the following line of code:
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// `window.request = superagent;`
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superagent
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.post('/api/pet')
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.send({ name: 'Manny', species: 'cat' }) // sends a JSON post body
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.set('X-API-Key', 'foobar')
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.set('accept', 'json')
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.end(function (err, res) {
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// Calling the end function will send the request
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});
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})();
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</script>
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```
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#### Bundler
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If you are using [browserify][], [webpack][], [rollup][], or another bundler, then you can follow the same usage as [Node](#node) above.
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## Supported Platforms
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* Node: v14.18.0+
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* Browsers (see [.browserslistrc](.browserslistrc)):
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```sh
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npx browserslist
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```
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```sh
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and_chr 102
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and_ff 101
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and_qq 10.4
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and_uc 12.12
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android 101
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chrome 103
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chrome 102
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chrome 101
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chrome 100
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edge 103
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edge 102
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edge 101
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firefox 101
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firefox 100
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firefox 91
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ios_saf 15.5
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ios_saf 15.4
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ios_saf 15.2-15.3
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ios_saf 15.0-15.1
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ios_saf 14.5-14.8
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ios_saf 14.0-14.4
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ios_saf 12.2-12.5
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kaios 2.5
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op_mini all
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op_mob 64
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opera 86
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opera 85
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safari 15.5
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safari 15.4
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samsung 17.0
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samsung 16.0
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```
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### Required Browser Features
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We recommend using <https://cdnjs.cloudflare.com/polyfill/> (specifically with the bundle mentioned in [VanillaJS](#vanillajs) above):
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```html
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<script src="https://cdnjs.cloudflare.com/polyfill/v3/polyfill.min.js?features=WeakRef,BigInt"></script>
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```
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* WeakRef is not supported in Opera 85, iOS Safari 12.2-12.5
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* BigInt is not supported in iOS Safari 12.2-12.5
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## Plugins
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SuperAgent is easily extended via plugins.
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```js
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const nocache = require('superagent-no-cache');
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const superagent = require('superagent');
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const prefix = require('superagent-prefix')('/static');
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superagent
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.get('/some-url')
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.query({ action: 'edit', city: 'London' }) // query string
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.use(prefix) // Prefixes *only* this request
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.use(nocache) // Prevents caching of *only* this request
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.end((err, res) => {
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// Do something
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});
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```
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Existing plugins:
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* [superagent-no-cache](https://github.com/johntron/superagent-no-cache) - prevents caching by including Cache-Control header
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* [superagent-prefix](https://github.com/johntron/superagent-prefix) - prefixes absolute URLs (useful in test environment)
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* [superagent-suffix](https://github.com/timneutkens1/superagent-suffix) - suffix URLs with a given path
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* [superagent-mock](https://github.com/M6Web/superagent-mock) - simulate HTTP calls by returning data fixtures based on the requested URL
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* [superagent-mocker](https://github.com/shuvalov-anton/superagent-mocker) — simulate REST API
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* [superagent-cache](https://github.com/jpodwys/superagent-cache) - A global SuperAgent patch with built-in, flexible caching
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* [superagent-cache-plugin](https://github.com/jpodwys/superagent-cache-plugin) - A SuperAgent plugin with built-in, flexible caching
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* [superagent-jsonapify](https://github.com/alex94puchades/superagent-jsonapify) - A lightweight [json-api](http://jsonapi.org/format/) client addon for superagent
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* [superagent-serializer](https://github.com/zzarcon/superagent-serializer) - Converts server payload into different cases
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* [superagent-httpbackend](https://www.npmjs.com/package/superagent-httpbackend) - stub out requests using AngularJS' $httpBackend syntax
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* [superagent-throttle](https://github.com/leviwheatcroft/superagent-throttle) - queues and intelligently throttles requests
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* [superagent-charset](https://github.com/magicdawn/superagent-charset) - add charset support for node's SuperAgent
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* [superagent-verbose-errors](https://github.com/jcoreio/superagent-verbose-errors) - include response body in error messages for failed requests
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* [superagent-declare](https://github.com/damoclark/superagent-declare) - A simple [declarative](https://en.wikipedia.org/wiki/Declarative_programming) API for SuperAgent
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* [superagent-node-http-timings](https://github.com/webuniverseio/superagent-node-http-timings) - measure http timings in node.js
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* [superagent-cheerio](https://github.com/mmmmmrob/superagent-cheerio) - add [cheerio](https://www.npmjs.com/package/cheerio) to your response content automatically. Adds `res.$` for HTML and XML response bodies.
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* [@certible/superagent-aws-sign](https://github.com/certible/superagent-aws-sign) - Sign AWS endpoint requests, it uses the aws4 to authenticate the SuperAgent requests
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Please prefix your plugin with `superagent-*` so that it can easily be found by others.
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For SuperAgent extensions such as couchdb and oauth visit the [wiki](https://github.com/ladjs/superagent/wiki).
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## Upgrading from previous versions
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Please see [GitHub releases page](https://github.com/ladjs/superagent/releases) for the current changelog.
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Our breaking changes are mostly in rarely used functionality and from stricter error handling.
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* [6.0 to 6.1](https://github.com/ladjs/superagent/releases/tag/v6.1.0)
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* Browser behaviour changed to match Node when serializing `application/x-www-form-urlencoded`, using `arrayFormat: 'indices'` semantics of `qs` library. (See: <https://www.npmjs.com/package/qs#stringifying>)
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* [5.x to 6.x](https://github.com/ladjs/superagent/releases/tag/v6.0.0):
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* Retry behavior is still opt-in, however we now have a more fine-grained list of status codes and error codes that we retry against (see updated docs)
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* A specific issue with Content-Type matching not being case-insensitive is fixed
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* Set is now required for IE 9, see [Required Browser Features](#required-browser-features) for more insight
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* [4.x to 5.x](https://github.com/ladjs/superagent/releases/tag/v5.0.0):
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* We've implemented the build setup of [Lass](https://lass.js.org) to simplify our stack and linting
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* Unminified browserified build size has been reduced from 48KB to 20KB (via `tinyify` and the latest version of Babel using `@babel/preset-env` and `.browserslistrc`)
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* Linting support has been added using `caniuse-lite` and `eslint-plugin-compat`
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* We can now target what versions of Node we wish to support more easily using `.babelrc`
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* [3.x to 4.x](https://github.com/ladjs/superagent/releases/tag/v4.0.0-alpha.1):
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* Ensure you're running Node 6 or later. We've dropped support for Node 4.
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* We've started using ES6 and for compatibility with Internet Explorer you may need to use Babel.
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* We suggest migrating from `.end()` callbacks to `.then()` or `await`.
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* [2.x to 3.x](https://github.com/ladjs/superagent/releases/tag/v3.0.0):
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* Ensure you're running Node 4 or later. We've dropped support for Node 0.x.
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* Test code that calls `.send()` multiple times. Invalid calls to `.send()` will now throw instead of sending garbage.
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* [1.x to 2.x](https://github.com/ladjs/superagent/releases/tag/v2.0.0):
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* If you use `.parse()` in the *browser* version, rename it to `.serialize()`.
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* If you rely on `undefined` in query-string values being sent literally as the text "undefined", switch to checking for missing value instead. `?key=undefined` is now `?key` (without a value).
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* If you use `.then()` in Internet Explorer, ensure that you have a polyfill that adds a global `Promise` object.
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* 0.x to 1.x:
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* Instead of 1-argument callback `.end(function(res){})` use `.then(res => {})`.
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## Contributors
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| Name |
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| ------------------- |
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| **Kornel Lesiński** |
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| **Peter Lyons** |
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| **Hunter Loftis** |
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| **Nick Baugh** |
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## License
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[MIT](LICENSE) © TJ Holowaychuk
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##
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[npm]: https://www.npmjs.com/
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[yarn]: https://yarnpkg.com/
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[jsdelivr]: https://www.jsdelivr.com/
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[unpkg]: https://unpkg.com/
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[browserify]: https://github.com/browserify/browserify
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[webpack]: https://github.com/webpack/webpack
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[rollup]: https://github.com/rollup/rollup
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