xenu_nntp/lib/nntp/tiny/socket.py

from nntp.tiny.buffer  import OutputBuffer, LineBuffer
from nntp.tiny.message import Message, MessagePart, each_line

class Connection():
    def __init__(self, sock):
        self.sock   = sock
        self.output = OutputBuffer(sock)
        self.buf    = LineBuffer()

    def print(self, text: str, end: str="\r\n"):
        return self.output.print(text, end)

    def flush(self):
        return self.output.flush()

    def readline(self):
        self.flush()
        return self.buf.readline(self.sock)

    def end(self):
        return self.print('.')

    def message_send_headers(self, message: Message):
        for name in message.headers:
            self.print("%s: %s" % (
                name, message.headers[name]
            ))

    def message_send_body(self, body: str):
        for line in each_line(body):
            stripped = line.rstrip()

            if stripped == '.':
                self.print('..')
            else:
                self.print(stripped)

    def message_send(self, message: Message, part: MessagePart):
        if part is MessagePart.HEAD or part is MessagePart.WHOLE:
            self.message_send_headers(message)

        if part is MessagePart.WHOLE:
            self.print('')

        if part is MessagePart.BODY or part is MessagePart.WHOLE:
            self.message_send_body(message.body)