正则表达式匹配路由参数

Question

I always have I kinda rough time working with regexes. I'm trying to make a regex that matches routes, when the route has parameters set:

For instance:

• /post/1 matches /post/{id}
• /post/5/ doesn't match /post/{id}
• /post/6/comments/4 matches /post/{id}/comments/{comment}
• /post/a-random-slug matches /post/{id} or /post/{slug} (whatever you want to name the param)
• /user matches /user, but not /user/

What I currently did is create a regex for every route, and then match the current URI against that route regex.

What I currently have is:

My regex

In this example I try to make a regex for the route: /post/{param1}/{param2}. Meaning it should match /post/ then a parameter and another parameter, but nothing after that parameter.

As you can see: ^(\/post\b)(\/.{1,}\/)(.{1,}\b)$ matches /post/what-is-your-name/5, and when I add another / it doesnt match anymore. However if you add characters after that regex again it starts to match again.

Meaning that:

• /post/what-is-your-name/5/ doesn't match
• /post/what-is-your-name/5/more does match

Does anyone have an idea how I can accomplish the first example?

I'm by far someone who knows a lot about regexes, if someone sees a better way to match URIs against routes then please let me know.

Answer 1

Hope this will help you out

Regex: ^(?:\/post\b)(?:\/[\w]+){2}$

Regex demo