How to use

randomString

function

in

random-string

// 获取验证码
// TODO: 换一个验证码
router.get('/captcha', function(req, res, next) {
  var captcha = ccap({
    width: 110,
    height: 42,
    offset: 25,
    quality: 100,
    fontsize: 34,
    generate: function() {
      // generate调用20次,缓存20个随机字符串
      var str = randomString({
        length: 4
      });
      return str;
    }
  });
  var cptArr = captcha.get();
  // 将生成的验证码存到session中
  req.session.captcha = cptArr[0].toLocaleLowerCase();
  res.write(cptArr[1]);
  res.end();
});

var newFileName = randomString({length: config.fileNameLength}) + fileExtension;
var uploadPath = __dirname + '/uploads/' + newFileName;
logger.info('Uploading file ' + file.name + ' to ' + newFileName + ' (' + shortKey + ')');