53 lines
894 B
JavaScript
53 lines
894 B
JavaScript
'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;
|
|
};
|