Is UTF-8 used everywhere for Tomcat 8.5.6?

[R <bi...@gmail.com>]

Hi,

I have a default installation of Tomcat 8.5.6. When I make a POST request
with a tilde character, and the encoding is set to UTF-8, it seems that my
servlet handler is decoding it incorrectly. I have to set the character
encoding on the HttpServletRequest parameter to decode properly, example:

  protected void doPost(HttpServletRequest request, ...) {
      // I have to set this manually.
      request.setCharacterEncoding("UTF-8");

      // Decoding works now.
      String test = request.getParam("test");
      ...
  }

Reading the Tomcat docs, it seems like everything should be UTF-8 by
default. Is there a setting we still have to apply to get UTF-8 to be the
default encoding?

Thanks

Re: Is UTF-8 used everywhere for Tomcat 8.5.6?

[Konstantin Kolinko <kn...@gmail.com>]

/2016-10-17 19:59 GMT+03:00 R <bi...@gmail.com>:
> Hi,
>
> I have a default installation of Tomcat 8.5.6. When I make a POST request
> with a tilde character, and the encoding is set to UTF-8, it seems that my
> servlet handler is decoding it incorrectly. I have to set the character
> encoding on the HttpServletRequest parameter to decode properly, example:
>
>   protected void doPost(HttpServletRequest request, ...) {
>       // I have to set this manually.
>       request.setCharacterEncoding("UTF-8");
>
>       // Decoding works now.
>       String test = request.getParam("test");
>       ...
>   }
>
> Reading the Tomcat docs, it seems like everything should be UTF-8 by
> default. Is there a setting we still have to apply to get UTF-8 to be the
> default encoding?

For GET requests it defaults to UTF-8  (though actually it depends on
STRICT_SERVLET_COMPLIANCE setting. I prefer to explicitly configure
URIEncoding="UTF-8" on a Connector).

For POST requests you need to use
"org.apache.catalina.filters.SetCharacterEncodingFilter" filter (or a
similar 3-rd party filter e.g. the one provided by Spring Framework)
that essentially calls request.setCharacterEncoding() for you.

See webapps/examples/WEB-INF/web.xml for an example.



Best regards,
Konstantin Kolinko

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Re: Is UTF-8 used everywhere for Tomcat 8.5.6?

[Mark Thomas <ma...@apache.org>]

On 17/10/2016 17:59, R wrote:
> Hi,
> 
> I have a default installation of Tomcat 8.5.6. When I make a POST request
> with a tilde character, and the encoding is set to UTF-8, it seems that my
> servlet handler is decoding it incorrectly.

The tilde character should not need to be encoded. The byte sequence is
also identical between UTF-8, ISO-8859-1 and ASCII.

You'll need to be more specific about exactly what URL you are passing
to Tomcat.


> I have to set the character
> encoding on the HttpServletRequest parameter to decode properly, example:
> 
>   protected void doPost(HttpServletRequest request, ...) {
>       // I have to set this manually.
>       request.setCharacterEncoding("UTF-8");
> 
>       // Decoding works now.
>       String test = request.getParam("test");
>       ...
>   }
> 
> Reading the Tomcat docs, it seems like everything should be UTF-8 by
> default. Is there a setting we still have to apply to get UTF-8 to be the
> default encoding?

No. Tomcat 8.5.x uses UTF-8 by default.

Mark


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