File size: 894 Bytes
bc20498 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 |
'use strict';
const {PassThrough: PassThroughStream} = require('stream');
module.exports = options => {
options = {...options};
const {array} = options;
let {encoding} = options;
const isBuffer = encoding === 'buffer';
let objectMode = false;
if (array) {
objectMode = !(encoding || isBuffer);
} else {
encoding = encoding || 'utf8';
}
if (isBuffer) {
encoding = null;
}
const stream = new PassThroughStream({objectMode});
if (encoding) {
stream.setEncoding(encoding);
}
let length = 0;
const chunks = [];
stream.on('data', chunk => {
chunks.push(chunk);
if (objectMode) {
length = chunks.length;
} else {
length += chunk.length;
}
});
stream.getBufferedValue = () => {
if (array) {
return chunks;
}
return isBuffer ? Buffer.concat(chunks, length) : chunks.join('');
};
stream.getBufferedLength = () => length;
return stream;
};
|