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26 lines
645 B
JavaScript
26 lines
645 B
JavaScript
"use strict";
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const Promise = require("bluebird");
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const ms = require("ms");
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const promiseDelaySince = require("@joepie91/promise-delay-every");
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const propagateAbort = require("@ppstreams/propagate-abort");
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module.exports = function rateLimitedStream(interval) {
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let intervalInMilliseconds = (typeof interval === "number")
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? interval
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: ms(interval);
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let delayer = promiseDelaySince(intervalInMilliseconds);
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return {
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description: `rate-limited stream (1 per ${interval})`,
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read: (source) => {
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return Promise.try(() => {
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return delayer();
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}).then(() => {
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return source.read();
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});
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},
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abort: propagateAbort
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}
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}; |