Non-english letter in BufferedWriter

Question

I've written a simple HTTP server in Java. I've a problem with returning data to the browser.

This write a returned content:

this.writer = new BufferedWriter(new OutputStreamWriter(this.socket.getOutputStream(), Charset.forName("UTF-8").newEncoder()));
...
writer.write(this.getResponseLine() + "\n");
writer.write("Content-Type: " + this.contentType + "; charset=utf-8\n");
writer.write("Content-Length: " + this.body.length() + "\n");
writer.write("\r\n");
writer.write(new String(this.body.getBytes(), "UTF-8"));
writer.flush();
writer.flush();

Method this.body.getBytes() returns "Witaj świecie", but in the brower is only "Witaj świeci" (missing the last letter).

Where is the problem?

Answer 1

My guess is: this.body.length() is the character count, not the byte count. With one UTF8 character in there, the Content-Length header will be too small by one byte, letting the browser stop reading from the socket before the HTTP message body actually ends.