在命名参数上重新定义正则表达式

Question

我正在使用 restify 2.8.4。

了解不支持带有正则表达式的命名参数 Mixing regex and :params in route #247

而不是将两种逻辑拼凑成一个块。

server.get ('/user/:id', function (req, res, next) {
  var id = req.params.id; 
  // check with isNaN()
  // if string do this
  // if number do that
}

我更喜欢下面的代码结构：

//hit this route when named param is a number
server.get (/user\/:id(\d+)/, function (req, res, next) {
  var id = req.params.id; 
  // do stuff with id
}

//hit this route when named param is a string
server.get (/user\/:name[A-Za-z]+/, function (req, res, next) {
  var name = req.params.name; 
  // do stuff with name
}

有什么方法可以将它们分成两个独立的关注点？

Answer 1

看起来你大部分已经自己完成了。只需从您的路线中删除标识符并确保您使用正则表达式捕获组。

//hit this route when named param is a number
server.get (/user\/(\d+)/, function (req, res, next) {
    var id = req.params[0]; 
    // do stuff with id
}

//hit this route when named param is a string
    server.get (/user\/([A-Za-z]+)/, function (req, res, next) {
    var name = req.params[0]; 
    // do stuff with name
}

编辑答案以纳入 Cheng Ping Onn 的意见。

在命名参数上重新定义正则表达式

restify regular expression on named parameter

restify