var ext=path.extname(dest);
      if(ext!='.jpg'){
       dest=replaceExt(dest, '.jpg');
      }
      console.log(path.extname(dest));
      var file = fs.createWriteStream(dest);
      ////console.log(url)
      if(url.indexOf('https')!=-1){
        //console.log("https")
        var request = https.get(url, function(response) {
        response.pipe(file);
        file.on('finish', function() {
          Jimp.read(dest).then(function (lennaa) {
            lennaa.resize(256, 256)            // resize
              .quality(90)                 // set JPEG quality
              .greyscale()                 // set greyscale
              .write(dest); // save
          }).catch(function (err) {
            console.error(err);
          });
          file.close(cb);  // close() is async, call cb after close completes.
        });
      }).on('error', function(err) { // Handle errors
        fs.unlink(dest); // Delete the file async. (But we don't check the result)
        if (cb) cb(err.message);
      });
      }