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# -*- test-case-name: twisted.protocols.haproxy.test -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Interfaces used by the PROXY protocol modules.
"""
import zope.interface
class IProxyInfo(zope.interface.Interface):
"""
Data container for PROXY protocol header data.
"""
header = zope.interface.Attribute(
"The raw byestring that represents the PROXY protocol header.",
)
source = zope.interface.Attribute(
"An L{twisted.internet.interfaces.IAddress} representing the "
"connection source."
)
destination = zope.interface.Attribute(
"An L{twisted.internet.interfaces.IAddress} representing the "
"connection destination."
)
class IProxyParser(zope.interface.Interface):
"""
Streaming parser that handles PROXY protocol headers.
"""
def feed(self, data):
"""
Consume a chunk of data and attempt to parse it.
@param data: A bytestring.
@type data: bytes
@return: A two-tuple containing, in order, an L{IProxyInfo} and any
bytes fed to the parser that followed the end of the header. Both
of these values are None until a complete header is parsed.
@raises InvalidProxyHeader: If the bytes fed to the parser create an
invalid PROXY header.
"""
def parse(self, line):
"""
Parse a bytestring as a full PROXY protocol header line.
@param line: A bytestring that represents a valid HAProxy PROXY
protocol header line.
@type line: bytes
@return: An L{IProxyInfo} containing the parsed data.
@raises InvalidProxyHeader: If the bytestring does not represent a
valid PROXY header.
"""