comparison mercurial/wireprototypes.py @ 37296:78103e4138b1

wireproto: port protocol handler to zope.interface

zope.interface is superior to the abc module. Let's port to it.

As part of this, we add tests for interface conformance for
classes implementing the interface.

Differential Revision: https://phab.mercurial-scm.org/D2983

37295:45b39c69fae0

# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

import abc

# Names of the SSH protocol implementations.
SSHV1 = 'ssh-v1'
# These are advertised over the wire. Increment the counters at the end
# to reflect BC breakages.

    using the application/mercurial-0.1 media type.
    """
    def __init__(self, gen=None):
        self.gen = gen

class baseprotocolhandler(object):
    """Abstract base class for wire protocol handlers.

    A wire protocol handler serves as an interface between protocol command
    handlers and the wire protocol transport layer. Protocol handlers provide
    methods to read command arguments, redirect stdio for the duration of
    the request, handle response types, etc.
    """

    __metaclass__ = abc.ABCMeta

    @abc.abstractproperty
    def name(self):
        """The name of the protocol implementation.

        Used for uniquely identifying the transport type.
        """

    @abc.abstractmethod
    def getargs(self, args):
        """return the value for arguments in <args>

        returns a list of values (same order as <args>)"""

    @abc.abstractmethod
    def forwardpayload(self, fp):
        """Read the raw payload and forward to a file.

        The payload is read in full before the function returns.
        """

    @abc.abstractmethod
    def mayberedirectstdio(self):
        """Context manager to possibly redirect stdio.

        The context manager yields a file-object like object that receives
        stdout and stderr output when the context manager is active. Or it
        yields ``None`` if no I/O redirection occurs.

        so it may be sent in the response. Some transports support streaming
        stdio to the client in real time. For these transports, stdio output
        won't be captured.
        """

    @abc.abstractmethod
    def client(self):
        """Returns a string representation of this client (as bytes)."""

    @abc.abstractmethod
    def addcapabilities(self, repo, caps):
        """Adds advertised capabilities specific to this protocol.

        Receives the list of capabilities collected so far.

        Returns a list of capabilities. The passed in argument can be returned.
        """

    @abc.abstractmethod
    def checkperm(self, perm):
        """Validate that the client has permissions to perform a request.

        The argument is the permission required to proceed. If the client
        doesn't have that permission, the exception should raise or abort
        in a protocol specific manner.

37296:78103e4138b1

# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

from .thirdparty.zope import (
    interface as zi,
)

# Names of the SSH protocol implementations.
SSHV1 = 'ssh-v1'
# These are advertised over the wire. Increment the counters at the end
# to reflect BC breakages.

    using the application/mercurial-0.1 media type.
    """
    def __init__(self, gen=None):
        self.gen = gen

class baseprotocolhandler(zi.Interface):
    """Abstract base class for wire protocol handlers.

    A wire protocol handler serves as an interface between protocol command
    handlers and the wire protocol transport layer. Protocol handlers provide
    methods to read command arguments, redirect stdio for the duration of
    the request, handle response types, etc.
    """

    name = zi.Attribute(
        """The name of the protocol implementation.

        Used for uniquely identifying the transport type.
        """)

    def getargs(args):
        """return the value for arguments in <args>

        returns a list of values (same order as <args>)"""

    def forwardpayload(fp):
        """Read the raw payload and forward to a file.

        The payload is read in full before the function returns.
        """

    def mayberedirectstdio():
        """Context manager to possibly redirect stdio.

        The context manager yields a file-object like object that receives
        stdout and stderr output when the context manager is active. Or it
        yields ``None`` if no I/O redirection occurs.

        so it may be sent in the response. Some transports support streaming
        stdio to the client in real time. For these transports, stdio output
        won't be captured.
        """

    def client():
        """Returns a string representation of this client (as bytes)."""

    def addcapabilities(repo, caps):
        """Adds advertised capabilities specific to this protocol.

        Receives the list of capabilities collected so far.

        Returns a list of capabilities. The passed in argument can be returned.
        """

    def checkperm(perm):
        """Validate that the client has permissions to perform a request.

        The argument is the permission required to proceed. If the client
        doesn't have that permission, the exception should raise or abort
        in a protocol specific manner.