'+' symbol problem in URL in IIS 7.x
Solution 1
The reason why you are facing this error is that IIS7 has introduced new URL filtering rules for security reasons. So '+' sign is blocked by default as part of security reason in URL.
To resolve this issue you have to set allowDoubleEscaping="true" in web.config files. Here is the tag to do that.
<system.webServer>
<security>
<requestFiltering allowDoubleEscaping="true">
</requestFiltering>
</security>
Solution 2
You can change the + to %20 when encoding to handle this programmatically, assuming that you have control over the code that's producing the urls.
Kashif
Updated on April 13, 2020Comments
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Kashif about 4 years
We are sending an HTML encoded string in the Query string. It was working fine on IIS 6 (windows 2003). We have recently moved the website to Windows 2008 (IIS 7.x). Since the move any Query String that contains "+" sign i.e., "%2b" gives error on the server "404 - File or directory not found."
Any help?
Best regards.
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Guffa over 13 yearsThe encoded
+
is the same as the encoded%20
, but the unencoded+
that is encoded as%2b
is not the same. -
Jamie Treworgy over 13 yearsPerhaps I misunderstood the question - I thought the problem was IIS not handling + as a space. If he actually has a plus sign as part of a file URL then it would have to be encoded as %2b (and hence should have worked anyway) since + means space in a query string.