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'use strict';
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const fs = require('fs');
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const util = require('util');
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const is = require('@sindresorhus/is');
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const isFormData = require('./is-form-data');
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module.exports = async options => {
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const {body} = options;
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if (options.headers['content-length']) {
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return Number(options.headers['content-length']);
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}
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if (!body && !options.stream) {
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return 0;
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}
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if (is.string(body)) {
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return Buffer.byteLength(body);
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}
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if (isFormData(body)) {
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return util.promisify(body.getLength.bind(body))();
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}
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if (body instanceof fs.ReadStream) {
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const {size} = await util.promisify(fs.stat)(body.path);
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return size;
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}
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return null;
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};
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