| 1 | export default function(url, options) {
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| 2 | options = options || {};
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| 3 | return new Promise( (resolve, reject) => {
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| 4 | let request = new XMLHttpRequest();
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| 5 |
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| 6 | request.open(options.method || 'get', url, true);
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| 7 |
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| 8 | for (let i in options.headers) {
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| 9 | request.setRequestHeader(i, options.headers[i]);
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| 10 | }
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| 11 |
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| 12 | request.withCredentials = options.credentials=='include';
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| 13 |
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| 14 | request.onload = () => {
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| 15 | resolve(response());
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| 16 | };
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| 17 |
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| 18 | request.onerror = reject;
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| 19 |
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| 20 | request.send(options.body || null);
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| 21 |
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| 22 | function response() {
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| 23 | let keys = [],
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| 24 | all = [],
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| 25 | headers = {},
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| 26 | header;
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| 27 |
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| 28 | request.getAllResponseHeaders().replace(/^(.*?):[^\S\n]*([\s\S]*?)$/gm, (m, key, value) => {
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| 29 | keys.push(key = key.toLowerCase());
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| 30 | all.push([key, value]);
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| 31 | header = headers[key];
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| 32 | headers[key] = header ? `${header},${value}` : value;
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| 33 | });
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| 34 |
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| 35 | return {
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| 36 | ok: (request.status/100|0) == 2,
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| 37 | status: request.status,
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| 38 | statusText: request.statusText,
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| 39 | url: request.responseURL,
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| 40 | clone: response,
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| 41 | text: () => Promise.resolve(request.responseText),
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| 42 | json: () => Promise.resolve(request.responseText).then(JSON.parse),
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| 43 | blob: () => Promise.resolve(new Blob([request.response])),
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| 44 | headers: {
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| 45 | keys: () => keys,
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| 46 | entries: () => all,
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| 47 | get: n => headers[n.toLowerCase()],
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| 48 | has: n => n.toLowerCase() in headers
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| 49 | }
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| 50 | };
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| 51 | }
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| 52 | });
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| 53 | }
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