Getting bad content in trailing section exception, when parsing xml produced by C# client in a GAEJ app

I am trying to POST a potentially large chunk of xml from a C# client to a GAEJ app, and then parse it into a DOM document.

I've managed to get the documentbuilder to parse the xml by parsing the request data into a string and then trimming it, as such:

        String xml;
        BufferedReader rdr = req.get开发者_运维问答Reader();
        String line;
        StringBuilder result = new StringBuilder();
        while ((line = rdr.readLine()) != null) {
            result.append(line);
        }
        xml = result.toString();
        db = dbf.newDocumentBuilder();
        Document doc = db.parse(new InputSource(new StringReader(xml.trim())));

However the GAEJ app should be as efficient as possible and reading the potentially large xml input to a string line by line, as opposed to feeding the sourcestream to the parser, seems quite bad. I would like the following to work:

        Document doc = db.parse(request.getInputStream());

But then I always get "org.xml.sax.SAXParseException: Content is not allowed in trailing section." If I dump the contents of the request.getInputStream() call to the console I can see some box-characters after the final closing tag, but I'm not sure how they got there (the clientside is using UTF-8 encoding), or how to remove them from the input stream. Thanks!

http://code.google.com/p/googleappengine/issues/detail?id=1344 http://code.google.com/p/googleappengine/issues/detail?id=1919