biofriction-wp-theme/node_modules/remove-bom-stream/index.js

52 lines
1008 B
JavaScript

'use strict';
var through = require('through2');
var removeBom = require('remove-bom-buffer');
var SafeBuffer = require('safe-buffer').Buffer;
function removeBomStream() {
var completed = false;
var buffer = SafeBuffer.alloc(0);
return through(onChunk, onFlush);
function removeAndCleanup(data) {
completed = true;
buffer = null;
return removeBom(data);
}
function onChunk(data, enc, cb) {
if (completed) {
return cb(null, data);
}
if (data.length >= 7) {
return cb(null, removeAndCleanup(data));
}
var bufferLength = buffer.length;
var chunkLength = data.length;
var totalLength = bufferLength + chunkLength;
buffer = SafeBuffer.concat([buffer, data], totalLength);
if (totalLength >= 7) {
return cb(null, removeAndCleanup(buffer));
}
cb();
}
function onFlush(cb) {
if (completed || !buffer) {
return cb();
}
cb(null, removeAndCleanup(buffer));
}
}
module.exports = removeBomStream;