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Simple request for browser.
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| (function(exports) { | |
| 'use strict'; | |
| class Request { | |
| static get METHODS() { | |
| return { | |
| GET: 'GET', | |
| POST: 'POST', | |
| PUT: 'PUT', | |
| DELETE: 'DELETE', | |
| HEAD: 'HEAD', | |
| OPTIONS: 'OPTIONS', | |
| CONNECT: 'CONNECT' | |
| }; | |
| } | |
| static get defaultOptions() { | |
| return { | |
| url: null, | |
| method: Request.METHODS.GET, | |
| headers: {}, | |
| data: null, | |
| query: null, | |
| json: false | |
| }; | |
| } | |
| constructor(defaults = Request.defaultOptions) { | |
| this.defaultOptions = defaults; | |
| this.pending = new Map(); | |
| Request.METHODS.forEach(({ key, value }) => { | |
| this[key.toLowerCase()] = (settings) => { | |
| return this.request(Object.assign(settings, { method: value })) | |
| } | |
| }); | |
| } | |
| request(settings) { | |
| return Request.request(Object.assign({}, this.defaultOptions, settings)); | |
| } | |
| static setRequestHeader (xhr, options) { | |
| const headers = Object.assign({ | |
| 'Content-type': (options.query && 'application/x-www-form-urlencoded') || (options.data && 'application/json'), | |
| 'Accept': options.json && 'application/json' | |
| }, options.headers); | |
| Object.keys(headers) | |
| .forEach(key => xhr.setRequestHeader(key, options.headers[key])); | |
| } | |
| static createBody (options) { | |
| if (options.query) { | |
| return Object.keys(options.query) | |
| .map(key => `${encodeURIComponent(key)}=${encodeURIComponent(options.query[key])}`).join('&'); | |
| } else if (options.data) { | |
| return JSON.stringify(options.data); | |
| } | |
| return ''; | |
| } | |
| static request(settings = Request.defaultOptions) { | |
| const xhr = new XMLHttpRequest(); | |
| const options = Object.assign(Request.defaultOptions, settings); | |
| const result = { | |
| options, | |
| xhr, | |
| response: null, | |
| promise: new Promise((resolve, reject) => { | |
| const rejectXhr = (error) => reject({ status: xhr.status, statusText: xhr.statusText, error }); | |
| xhr.open(options.method, options.url, true, options.user, options.password); | |
| xhr.addEventListener('error', rejectXhr, { once: true }); | |
| xhr.addEventListener('load', () => { | |
| if (xhr.status.toString()[0] === '2') resolve(xhr.response); | |
| else rejectXhr(); | |
| }, { once: true }); | |
| Request.setRequestHeader(xhr, options); | |
| xhr.send(Request.createBody(options)); | |
| }).then((data) => options.json ? JSON.parse(data) : data) | |
| }; | |
| result.promise.then(data => result.response = data); | |
| return result; | |
| } | |
| } | |
| exports.request = Request; | |
| })(typeof exports === 'undefined' ? window : exports); |
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