问题描述
我需要构建一个路由器，将REST请求路由到正确的控制器和操作。这里有一些例子：
I need to build a router, that routes a REST request to a correct controller and action. Here some examples:
POST /users
GET /users/:uid
GET /users/search&q=lol
GET /users
GET /users/:uid/pictures
GET /users/:uid/pictures/:pid
重要的是要有一个正则表达式并且尽可能好，因为路由是必不可少的，并且在每次请求时都会完成。
It is important to have a single regular expression and as good as possible since routing is essential and done at every request.
我们首先必须用正则表达式替换：（直到结束或直到下一个正斜杠/），然后我们可以使用它来验证带有请求网址的网址。
we first have to replace : (untill end or untill next forward slash /) in the urls with a regex, that we can afterwards use to validate the url with the request url.
我们如何用正则表达式替换这些动态路由？就像搜索以：开头并以/结尾的字符串，字符串结尾或&。
How can we replace these dynamic routings with regex? Like search for a string that starts with ":" and end with "/", end of string or "&".
这是我试过的：
var fixedUrl = new RegExp(url.replace(/\\\:[a-zA-Z0-9\_\-]+/g, '([a-zA-Z0-0\-\_]+)'));
由于某种原因，它不起作用。我如何实现用正则表达式替换：id的正则表达式，或者在与真实请求网址进行比较时忽略它们。
For some reason it does not work. How could I implement a regex that replaces :id with a regex, or just ignores them when comparing to the real request url.
感谢您的帮助
推荐答案
我使用：[^ \s /] + 来匹配参数，以...开头冒号（匹配：，然后尽可能多的字符，除了 / 和空格）。
I'd use :[^\s/]+ for matching parameters starting with colon (match :, then as many characters as possible except / and whitespace).
作为替换，我使用（[\\\\ - ] +）来匹配任何字母数字字符， - 和 _ 。
As replacement, I'm using ([\\w-]+) to match any alphanumeric character, - and _, in a capture group, given you're interested in using the matched parameters as well.
var route = "/users/:uid/pictures";
var routeMatcher = new RegExp(route.replace(/:[^\s/]+/g, '([\\w-]+)'));
var url = "/users/1024/pictures";
console.log(url.match(routeMatcher))
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