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# -*- test-case-name: twisted.protocols.haproxy.test.test_parser -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Parser for 'haproxy:' string endpoint.
"""
from zope.interface import implementer
from twisted.plugin import IPlugin
from twisted.internet.endpoints import (
quoteStringArgument, serverFromString, IStreamServerEndpointStringParser
)
from twisted.python.compat import iteritems
from . import proxyEndpoint
def unparseEndpoint(args, kwargs):
"""
Un-parse the already-parsed args and kwargs back into endpoint syntax.
@param args: C{:}-separated arguments
@type args: L{tuple} of native L{str}
@param kwargs: C{:} and then C{=}-separated keyword arguments
@type arguments: L{tuple} of native L{str}
@return: a string equivalent to the original format which this was parsed
as.
@rtype: native L{str}
"""
description = ':'.join(
[quoteStringArgument(str(arg)) for arg in args] +
sorted(['%s=%s' % (quoteStringArgument(str(key)),
quoteStringArgument(str(value)))
for key, value in iteritems(kwargs)
]))
return description
@implementer(IPlugin, IStreamServerEndpointStringParser)
class HAProxyServerParser(object):
"""
Stream server endpoint string parser for the HAProxyServerEndpoint type.
@ivar prefix: See L{IStreamServerEndpointStringParser.prefix}.
"""
prefix = "haproxy"
def parseStreamServer(self, reactor, *args, **kwargs):
"""
Parse a stream server endpoint from a reactor and string-only arguments
and keyword arguments.
@param reactor: The reactor.
@param args: The parsed string arguments.
@param kwargs: The parsed keyword arguments.
@return: a stream server endpoint
@rtype: L{IStreamServerEndpoint}
"""
subdescription = unparseEndpoint(args, kwargs)
wrappedEndpoint = serverFromString(reactor, subdescription)
return proxyEndpoint(wrappedEndpoint)
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