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29 lines
901 B
29 lines
901 B
9 years ago
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'use strict';
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const common = require('../common');
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const stream = require('stream');
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// A writable stream which pushes data onto the stream which pipes into it,
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// but only the first time it's written to. Since it's not paused at this time,
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// a second write will occur. If the pipe increases awaitDrain twice, we'll
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// never get subsequent chunks because 'drain' is only emitted once.
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const writable = new stream.Writable({
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write: common.mustCall((chunk, encoding, cb) => {
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if (chunk.length === 32 * 1024) { // first chunk
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readable.push(new Buffer(33 * 1024)); // above hwm
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}
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cb();
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}, 3)
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});
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// A readable stream which produces two buffers.
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const bufs = [new Buffer(32 * 1024), new Buffer(33 * 1024)]; // above hwm
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const readable = new stream.Readable({
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read: function() {
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while (bufs.length > 0) {
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this.push(bufs.shift());
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}
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}
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});
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readable.pipe(writable);
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