Regular expression for url longer than 3 characters Nginx

All In

10/10/23, 8:16 AM

There is a website site.ru/ I need to write a regular expression where pages longer than 3 characters only work after the first slash. If in this case there are other pages after the slash, then 404 was returned. For example

site.ru/demo -> site.ru/demo
site.ru/dem/dem -> site.ru/dem/dem
site.ru/demo/{string of any length} -> 404

I wrote the following regular expression,

map $example {
            default 0;
            "~[^\/]\w.{3,}" 1;
}

but it works on both site.ru/demo and site.ru/demo/demo. Where is my mistake?

0 + 5

linux

nginx

regex

Richard Smith

10/10/23, 8:57 AM

`/demo/demo` is probably a bad example, which one causes it to fail? `/demo/dem` or `/dem/demo`?

All In

10/10/23, 1:37 PM

@Richard Smith added update: can be a string of any length

Richard Smith

10/10/23, 1:47 PM

Try: "~^/\w{4,}/"

William Martens

10/10/23, 3:44 PM

I don't know but this grabs urls; can be a good starting point I guess; `"(http|https)://[a-zA-Z0-9./?=_%:-]*"` `tested in bash`

Tero Kilkanen

10/11/23, 10:21 PM

Can you elaborate where the `$example` variable is used? That affects what has to be considered when writing the regex? Also, you can use https://regexr.com to play with the regular expressions.

Elon Musk

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EN: Regular expression for url longer than 3 characters Nginx

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