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35 lines
1021 B
JavaScript
35 lines
1021 B
JavaScript
'use strict';
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const Promise = require("bluebird");
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const bhttp = require("bhttp");
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const debug = require("debug")("seekable:http");
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function generateRangeHeader(start, end) {
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if (start != null && end != null) {
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return `bytes=${start}-${end}`;
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} else if (start != null && end == null) {
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return `bytes=${start}-`;
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} else if (start == null && end != null) {
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return `bytes=-${end}`;
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} else {
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return null;
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}
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}
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module.exports = function getHttpSeekable(targetUrl) {
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return {
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createReadStream: function createReadStream(start, end) {
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return Promise.try(() => {
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debug(`${start}-${end} -- ${targetUrl}`);
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return bhttp.get(targetUrl, {
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stream: true,
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headers: {
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"range": generateRangeHeader(start, end) // FIXME: What if there is no range specified at all? Is `null` valid then?
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}
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});
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});
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}
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}
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};
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