On 24/10/2014 21:22, Konstantin Kolinko wrote:
> 2014-10-24 23:48 GMT+04:00  <ma...@apache.org>:
>> Author: markt
>> Date: Fri Oct 24 19:48:18 2014
>> New Revision: 1634125
>>
>> URL: http://svn.apache.org/r1634125
>> Log:
>> Fix double counting of written characters.
>>
>> Modified:
>>     tomcat/trunk/java/org/apache/catalina/connector/OutputBuffer.java
>>
>> Modified: tomcat/trunk/java/org/apache/catalina/connector/OutputBuffer.java
>> URL: 
>> http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/connector/OutputBuffer.java?rev=1634125&r1=1634124&r2=1634125&view=diff
>> ==============================================================================
>> --- tomcat/trunk/java/org/apache/catalina/connector/OutputBuffer.java 
>> (original)
>> +++ tomcat/trunk/java/org/apache/catalina/connector/OutputBuffer.java Fri 
>> Oct 24 19:48:18 2014
>> @@ -523,7 +523,6 @@ public class OutputBuffer extends Writer
>>              return;
>>          }
>>
>> -        charsWritten += len;
>>          if (s == null) {
>>              s = "null";
>>          }
> 
> The context of the above change is
> 
>   @Override
>   public void write(String s, int off, int len)
>         throws IOException {
> 
>         if (suspended) {
>             return;
>         }
> 
>         if (s == null) {
>             s = "null";
>         }
>         cb.append(s, off, len);
>         charsWritten += len;
>     }
> 
> The null value handling there is rather odd. It writes len character
> from string "null". It makes no sense. (Whose offset and whose length
> are those?)

Indeed. Worth looking at the history and the specs though first in case
there is a good reason for this.

Mark

> 
> java.io.Writer implements the same method so that it blows with an
> NPE. I think our implementation shall throw NPE as well.
> 
> Best regards,
> Konstantin Kolinko
> 
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