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A potentially dangerous Request.Path value was detected from the client (&).

Posted on 2013-02-06
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Last Modified: 2013-04-03
I've looked this error up and tried fixing it for quite a while but am still stuck.

My .NET app, passes a filepath name to a Javascript function that I created, which then passes the path to a Flash audio player to play MP3s.  This works fine except for when there is an ampersand in the file path.  

After reading, I learned to try adding the following to my page directive:  ValidateRequest="false"
This didn't work, so I tried adding it globally in web.config, like so:
    <httpRuntime requestValidationMode="2.0"/>
    <pages validateRequest="false" />

That didn't work either.

Any ideas?

For testing, I was just trying to play the MP3 from my browser by typing in the URL, like so:
www.mysite.com/audio_folder/albums/Jack & Jill/Song123.mp3

This gives me the dangerous request path error.
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Question by:Xbradders
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by:nmarun
nmarun earned 125 total points
ID: 38862326
Try this:

<httpRuntime requestPathInvalidChars="&lt;,&gt;,*,%,:,\,?" />

Arun
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LVL 27

Expert Comment

by:nmarun
ID: 38862328
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LVL 26

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by:
Alan Warren earned 125 total points
ID: 38862551
Have you tried passing an HtmlEncoded File path to the JavaScript function?
Server.HtmlEncode("strFilePath")

Alan
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LVL 83

Assisted Solution

by:Dave Baldwin
Dave Baldwin earned 125 total points
ID: 38863033
'&' is supposed to be used as a query string separator and spaces are supposed to be urlencoded as '%20'.  While they may be valid on your machine, they are trouble on the web.  I always remove spaces from filenames and paths and would not use an '&' in them either.
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