| 1 | 'use strict';
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| 2 | const fs = require('fs');
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| 3 | const util = require('util');
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| 4 | const is = require('@sindresorhus/is');
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| 5 | const isFormData = require('./is-form-data');
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| 6 |
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| 7 | module.exports = async options => {
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| 8 | const {body} = options;
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| 9 |
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| 10 | if (options.headers['content-length']) {
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| 11 | return Number(options.headers['content-length']);
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| 12 | }
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| 13 |
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| 14 | if (!body && !options.stream) {
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| 15 | return 0;
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| 16 | }
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| 17 |
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| 18 | if (is.string(body)) {
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| 19 | return Buffer.byteLength(body);
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| 20 | }
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| 21 |
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| 22 | if (isFormData(body)) {
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| 23 | return util.promisify(body.getLength.bind(body))();
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| 24 | }
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| 25 |
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| 26 | if (body instanceof fs.ReadStream) {
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| 27 | const {size} = await util.promisify(fs.stat)(body.path);
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| 28 | return size;
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| 29 | }
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| 30 |
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| 31 | if (is.nodeStream(body) && is.buffer(body._buffer)) {
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| 32 | return body._buffer.length;
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| 33 | }
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| 34 |
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| 35 | return null;
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| 36 | };
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