Christopher Schultz schrieb am 01.12.2008 um 13:15:24 (-0500):
> Michael Ludwig wrote:
[Better late than never.]
> > public HttpResponseCatcher( HttpServletResponse res) {
> > super( res);
> > this.buffer = new ByteArrayOutputStream();
> > this.stream = new CapturedServletOutputStream( this.buffer);
> > this.writer = new PrintWriter( new OutputStreamWriter( this.stream));
>
> ! No character encoding!
Yes, the ctor OutputStreamWriter(OutputStream out, String charsetName)
should be used, so:
new OutputStreamWriter( this.stream, this.getCharacterEncoding())
> I would lazily instantiate these objects -- at least the stream and
> writer. There's no need to create a writer if the caller doesn't ask
> for one.
Okay, probably like this:
private ByteArrayOutputStream buffer;
private CapturedServletOutputStream stream;
private StringWriter stringWriter;
private PrintWriter writer;
public ServletOutputStream getOutputStream() throws IOException {
getResponse().getOutputStream();
if ( buffer == null) {
buffer = new ByteArrayOutputStream();
stream = new CapturedServletOutputStream( buffer);
}
return stream;
}
public PrintWriter getWriter() throws IOException {
getResponse().getWriter();
if ( stringWriter == null ) {
stringWriter = new StringWriter();
writer = new PrintWriter( stringWriter);
}
return writer;
}
I'm using a StringWriter as a backing class here, following a
recommendation you made in a previous post (20.11.08).
> Also, the caller might want to set the character encoding on the
> response, and you have to allow that to occur before you create your
> writer.
Now has to be handled by the underlying response object.
> > public byte[] getByteArray() { return buffer.toString().getBytes(); }
>
> Yikes! You aren't checking the character encoding of the response! You
> definitely need to do this in order to properly implement this method.
Yes, this should be:
return buffer.toString( this.getCharacterEncoding()).getBytes()
And "buffer" in this case has to be of type ByteArrayOutputStream, not
just OutputStream.
Thanks for all your help,
Michael Ludwig
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