On Wed, 5 Nov 2003, Adam Hardy wrote:
>- it lies with the character set interpretation in the HTML output from
>the database and files - which files? I'm not familiar with file reading
> or whether you have to specify a character set.
Because of the "timing aspect" (next paragraph), I am sure it's nothing to
do with settings concerning files or databases.
>- it occurs after random time intervals after starting tomcat. It
>doesn't ever go away again does it?
Exaclty.
Although I could imagine an "event" not being exactly "random" might
"switch" the behaviour.
>- the problem is overcome currently by restarting tomcat. This narrows
>it down to Java or Tomcat basically. So you can forget the OS or the
>database.
Yes, exactly my thought.
>- you manually encode umlauted letters into HTML code. I presume you
>have a filter with a big switch case construct that parses your output
>strings. Perhaps you should log the output of the ASCII value of the
>umlauted letters, to see what you are really getting instead of what you
>should be getting.
Good idea, i will write a test app which replaces unknwon characters
with something like '_'+ASCII code+'_' instead of a space._
What I have forgotten to test out so far is, if all applications share
the problem once it started. But I believe so.
>Where does the filter operate in your app? Obviously you have already
>fetched your output string from either JDBC or from a file at the point
>when you apply the filter. It is unlikely that both JDBC and the
>file-reading processes always go wrong simulataneously. That is the case
>though?
Yes.
The operation goes like this:
Read text files ...
StringBuffer sb=new StringBuffer();
BufferedReader reader=new BufferedReader(new FileReader(pathToFile));
String nextLine=reader.readLine();
while (nextLine != null)
{ sb.append(nextLine).append("\n");
nextLine=reader.readLine(); }
... or database queries ...
String = resulset.getString(colname);
... then put it through a loop including ...
switch (string.charAt(i))
{ ...
'�' : stringbuffer.append('ä'); break;
...
default: stringbuffer.append(string.charAt(i));
}
... finally print like this ....
writer=new PrintWriter(resp.getOutputStream());
writer.write(string);
The point the problem occurs (or at least shows up) is that the
switch statement walks the default branch for e.g. '�'.
So far thanks for the clearer formulation of the problem ;->>
kr
Christoph Lechleitner
Gesch�ftsf�hrung und Technik
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