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