在Java代理服务器中生成HTTP响应

Question

How would I display an HTTP 403 response to the client when the client attempts to access a forbidden page? I have the code below, but it doesn't display anything on the clients browser. May be a trivial error, but I'm new to this so anything helps.

                            // If webpage is not allowed, then redirect user to a blocked
            // URL page
            if (!checkHost(fin, requestSplit[3].split("\r")[0])) {
                System.out.println("DON'T SHOW");

                OutputStream to_client = clientSocket.getOutputStream();
                PrintStream ps = new PrintStream(to_client);
                ps.print("HTTP/1.1  403 Forbidden\r\n");
                ps.print("Connection: close\r\n");
                ps.print("\r\n");
                ps.close();

Answer 1

1. You should close the PrintStream, not the Socket.
2. The line terminator in HTTP is defined as \\r\\n , not whatever println() does, which is platform-dependent.
3. There's no point in setting a Content-type , a Date , or an Accept-Ranges header in a 404 response.
4. incomingOS is a terrible name for an output stream.

Your edit doesn't comply with (2) above.