node as perl

fixFiles.js

var cheerio = require('cheerio'),
	iconv = require('iconv-lite'),
	sizeOf = require('image-size'),
	fs = require('fs');
	
iconv.extendNodeEncodings(); //to use win1251 as node encoding

//extract filename from PHP method
function getFilenameFromGetUrld(str) {
	var newStr = str.substr(str.indexOf("'") + 1)
	newStr = newStr.substr(0, newStr.indexOf("'"))
	return newStr;
}

function getDimensions(filename) {
	filename = '/path/to/images/folder/' + filename
	return sizeOf(filename)
}

function generateMeta(dimensions) {
	return cheerio.load('<meta itemprop="width" content="' + dimensions.width + 'px">\n        <meta itemprop="height" content="' + dimensions.height +'px">\n        ');
}

function getFixed(filename) {
	console.log('fixing', filename);
	
  //win1251 -> utf8
	var text = fs.readFileSync(prefix + filename, {encoding:'win1251'}); 
	
	var $ = cheerio.load(text, {decodeEntities: false});
	var $img = $('img[itemprop="contentUrl"]')
	
	if ($img.length > 0) {
		var dimensions = getDimensions(getFilenameFromGetUrld($img.attr('src')));
		var els = generateMeta(dimensions);
	
		$img.before(els.html())
	
		//utf8 -> win1251
		fs.writeFileSync(prefix + filename, iconv.encode($.html(), 'win1251'));
	} else {
		console.log('no img in ', filename, '!'); //it helped find one file, where img was incorrect
	}
}

var prefix = '/path/to/files/';
var files = fs.readdirSync(prefix);

files.forEach(getFixed)