aaac7fed
 liuqimichale
add
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'use strict';
const PassThrough = require('stream').PassThrough;
module.exports = opts => {
opts = Object.assign({}, opts);
const array = opts.array;
let encoding = opts.encoding;
const buffer = encoding === 'buffer';
let objectMode = false;
if (array) {
objectMode = !(encoding || buffer);
} else {
encoding = encoding || 'utf8';
}
if (buffer) {
encoding = null;
}
let len = 0;
const ret = [];
const stream = new PassThrough({objectMode});
if (encoding) {
stream.setEncoding(encoding);
}
stream.on('data', chunk => {
ret.push(chunk);
if (objectMode) {
len = ret.length;
} else {
len += chunk.length;
}
});
stream.getBufferedValue = () => {
if (array) {
return ret;
}
return buffer ? Buffer.concat(ret, len) : ret.join('');
};
stream.getBufferedLength = () => len;
return stream;
};
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