RegEx获取文件的路径，没有域

I'm new to regular expressions, and have no clue where to start, it's like a diff language to me. But I need one quick to accomplish a task.

我是正则表达式的新手,并且不知道从哪里开始,这对我来说就像是一种差异语言。但我需要一个快速完成任务。

I need to take

我需要服用

http://www.domain.com/folder1/folder2/file_path.txt

and get just

得到的

/folder1/folder2/file_path.txt

from it.

Thanks!

4 个解决方案

#1

construct a URI object from it and one of the properties of it will have what you want.

从它构造一个URI对象,其中一个属性将具有你想要的。

#2

I think that regex should work:

我认为正则表达式应该有效:

^http://.*?/(.*)$

(tested with Python)

(用Python测试)

#3

Since VB.NET is in the tag for this question, I assume you have access at the server side to the Request object:

由于VB.NET位于此问题的标记中,因此我假设您可以在服务器端访问Request对象:

Dim instance As HttpRequest
Dim value As String

value = instance.Path

This should give you exactly what you asked for.

这应该会给你你所要求的。

Edit: On second thought - you could be parsing URLs from some input string... in which case, regex will only help if you have a simple (regular) set of inputs:

编辑:第二个想法 - 你可以从一些输入字符串解析URL ...在这种情况下,正则表达式只有在你有一组简单(常规)输入时才有用:

Do you know all the possible domains? i.e. are "http://www.ABC.com" and "http://www.DEF.com" the only possible domains?

你知道所有可能的域吗?即“http://www.ABC.com”和“http://www.DEF.com”是唯一可能的域名?

Then here:

Dim text As String = "http://www.ABC.com/folder1/folder2/file.txt"
Dim pattern As String = "(?:http://www.ABC.com|http://www.DEF.com)(.*)"

Dim r As Regex = new Regex(pattern, RegexOptions.IgnoreCase)

' Match the regular expression pattern against a text string.
Dim m As Match = r.Match(text)
Dim g as Group = m.Groups(2)  'Gives the string matched by the capturing parentheses

#4

Supporting more protocols and making the protocol optional too.

支持更多协议并使协议也可选。

((https?|ftp)://)?(.*?)/(.*)

#1