格式化URL

//格式化url查询参数为json
function formatUrl(url){
    var reg=/(?:[?&]+)([^&]+)=([^&]+)/g;
    var data={};
    function fn(str,pro,value){
        data[decodeURIComponent(pro)]=decodeURIComponent(value);
    }
    url.replace(reg,fn);
    return data;
} 

//替换索引编号
function replaceIndex(str){

    var regExp = new RegExp('<%=(.*?)%>');
    var replaceText = Math.floor(Math.random()*100000000);
    var i = str.search('<%=(.*?)%>');
    var n = str.search(regExp);

    console.log('i ', i, n, typeof str);

    var newstr = str.replace(regExp,replaceText);
    //console.log( newstr );

    fs.writeFile(path, newstr, 'utf-8', function(err){
        console.log('backfill error',err);
    });
}