Detect the URI encoding automatically in Tomcat

Posted by Roland Illig on Stack Overflow See other posts from Stack Overflow or by Roland Illig
Published on 2010-04-17T06:34:32Z Indexed on 2010/04/17 6:43 UTC
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tomcat

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uri

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encoding

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url-encoding

I have an instance of Apache Tomcat 6.x running, and I want it to interpret the character set of incoming URLs a little more intelligent than the default behavior. In particular, I want to achieve the following mapping:

So%DFe => Soße
So%C3%9Fe => Soße
So%DF%C3%9F => (error)

The bevavior I want could be described as "try to decode the byte stream as UTF-8, and if it doesn't work assume ISO-8859-1".

Simply using the URIEncoding configuration doesn't work in that case. So how can I configure Tomcat to encode the request the way I want?

I might have to write a Filter that takes the request (especially the query string) and re-encodes it into the parameters. Would that be the natural way?

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