node.js - Return number of files at ZIP package with NodeJS -

here function number of files within zip package.

// check if .zip package contains @ least 1 html file , return number of files function validatearchive(path, callback) {     var filescount = 0;      var unzipparser = unzip.parse();     var readstream = fs.createreadstream(path).pipe(unzipparser);     unzipparser.on('error', function(err) {         throw err;     });      readstream.on('entry', function (entry) {         var filename = entry.path;         var type = entry.type; // 'directory' or 'file'         if (type == 'file') {             var fext = filename.split('.')[1];             if (fext === 'html') {                 filescount++;             }         }         entry.autodrain();     });      // returns number of files     settimeout(function () {         callback(filescount);     }, 1000); } 

as can see have problem returning number of files because asynchronous process in place.

any ideas hot return number of files without using settimeout method?

you can listen close event:

unzipparser.on('close', function() {     callback(filescount); }); 

which emitted when end of zip reached.