Solved

What's wrong with this web.config regex?

Posted on 2016-09-30
3
53 Views
Last Modified: 2016-09-30
I have a web.config file with the following rule in it:

<rule name="redirectStaticFileRequestsToDownloadHandler" stopProcessing="true">
       <match url="board\/([0-9]+)\/boarddocs\/([^/]+)?$" />
      <action type="Redirect" url="/download?filename={R:2}" appendQueryString="false" />
</rule>

Open in new window


If anyone tries to access a file from a URL like "board/[any number]/boarddocs/[any string]" it will redirect them to "/download?filename=[that second string from the URL example]". I've run my code through http://www.regexr.com/ and it says it should be capturing group #2. I tested replacing {R:2} with {R:1} and it redirects to the first captured string ([any number]) like expected.

What am I doing wrong in trying to reference that second string? Thanks!
0
Comment
Question by:SiobhanElara
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 27

Accepted Solution

by:
Dr. Klahn earned 250 total points
ID: 41823927
The up-caret ^ is a reserved character in regexes which indicates "start of string".  Since the location of the second regex is well past the start of string, there will be no match on any input.

Suggest:  .* instead which will capture anything to the end of the original URI.
0
 
LVL 20

Assisted Solution

by:Russ Suter
Russ Suter earned 250 total points
ID: 41823940
@Dr. Klahn
The caret here is specifying that the capture group matches against any character that is not a '/' character. This is perfectly acceptable Regex syntax.

@SiobhanElara
This regex won't match if the user has additional '/' characters after. For example, the following URL would match:
http://board/2341/boarddocs/foo.html
But this won't:
http://board/2341/boarddocs/foo/mydoc.html

Could that be your issue here?
1
 

Author Closing Comment

by:SiobhanElara
ID: 41824058
Thanks, folks! Changing to .* solved the problem, including any slashes being passed along.
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

To effectively work with Diskpart on a Server Core, it is necessary to write some small batch script's, because you can't execute diskpart in a remote powershell session. To get startet, place the Diskpart batch script's into a share on your loca…
Background Information Recently I have fixed file server permission issues for one of my client. The client has 1800 users and one Windows Server 2008 R2 domain joined file server with 12 TB of data, 250+ shared folders and the folder structure i…
This tutorial will show how to configure a single USB drive with a separate folder for each day of the week. This will allow each of the backups to be kept separate preventing the previous day’s backup from being overwritten. The USB drive must be s…
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question