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56 lines
1.2 KiB
56 lines
1.2 KiB
3 years ago
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/*global module, process*/
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var Buffer = require('safe-buffer').Buffer;
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var Stream = require('stream');
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var util = require('util');
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function DataStream(data) {
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this.buffer = null;
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this.writable = true;
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this.readable = true;
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// No input
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if (!data) {
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this.buffer = Buffer.alloc(0);
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return this;
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}
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// Stream
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if (typeof data.pipe === 'function') {
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this.buffer = Buffer.alloc(0);
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data.pipe(this);
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return this;
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}
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// Buffer or String
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// or Object (assumedly a passworded key)
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if (data.length || typeof data === 'object') {
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this.buffer = data;
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this.writable = false;
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process.nextTick(function () {
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this.emit('end', data);
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this.readable = false;
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this.emit('close');
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}.bind(this));
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return this;
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}
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throw new TypeError('Unexpected data type ('+ typeof data + ')');
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}
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util.inherits(DataStream, Stream);
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DataStream.prototype.write = function write(data) {
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this.buffer = Buffer.concat([this.buffer, Buffer.from(data)]);
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this.emit('data', data);
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};
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DataStream.prototype.end = function end(data) {
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if (data)
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this.write(data);
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this.emit('end', data);
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this.emit('close');
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this.writable = false;
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this.readable = false;
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};
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module.exports = DataStream;
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