D2983: wireproto: port protocol handler to zope.interface
indygreg (Gregory Szorc)
phabricator at mercurial-scm.org
Fri Mar 30 21:16:18 UTC 2018
indygreg created this revision.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.
REVISION SUMMARY
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.
REPOSITORY
rHG Mercurial
REVISION DETAIL
https://phab.mercurial-scm.org/D2983
AFFECTED FILES
mercurial/wireprotoserver.py
mercurial/wireprototypes.py
tests/test-check-interfaces.py
CHANGE DETAILS
diff --git a/tests/test-check-interfaces.py b/tests/test-check-interfaces.py
--- a/tests/test-check-interfaces.py
+++ b/tests/test-check-interfaces.py
@@ -19,6 +19,8 @@
statichttprepo,
ui as uimod,
unionrepo,
+ wireprotoserver,
+ wireprototypes,
)
rootdir = os.path.normpath(os.path.join(os.path.dirname(__file__), '..'))
@@ -122,4 +124,23 @@
repo = localrepo.localrepository(ui, rootdir)
checkzobject(repo)
+ ziverify.verifyClass(wireprototypes.baseprotocolhandler,
+ wireprotoserver.sshv1protocolhandler)
+ ziverify.verifyClass(wireprototypes.baseprotocolhandler,
+ wireprotoserver.sshv2protocolhandler)
+ ziverify.verifyClass(wireprototypes.baseprotocolhandler,
+ wireprotoserver.httpv1protocolhandler)
+ ziverify.verifyClass(wireprototypes.baseprotocolhandler,
+ wireprotoserver.httpv2protocolhandler)
+
+ sshv1 = wireprotoserver.sshv1protocolhandler(None, None, None)
+ checkzobject(sshv1)
+ sshv2 = wireprotoserver.sshv2protocolhandler(None, None, None)
+ checkzobject(sshv2)
+
+ httpv1 = wireprotoserver.httpv1protocolhandler(None, None, None)
+ checkzobject(httpv1)
+ httpv2 = wireprotoserver.httpv2protocolhandler(None, None)
+ checkzobject(httpv2)
+
main()
diff --git a/mercurial/wireprototypes.py b/mercurial/wireprototypes.py
--- a/mercurial/wireprototypes.py
+++ b/mercurial/wireprototypes.py
@@ -5,7 +5,9 @@
from __future__ import absolute_import
-import abc
+from .thirdparty.zope import (
+ interface as zi,
+)
# Names of the SSH protocol implementations.
SSHV1 = 'ssh-v1'
@@ -95,39 +97,33 @@
def __init__(self, gen=None):
self.gen = gen
-class baseprotocolhandler(object):
+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.
"""
- __metaclass__ = abc.ABCMeta
-
- @abc.abstractproperty
- def name(self):
+ name = zi.Attribute(
"""The name of the protocol implementation.
Used for uniquely identifying the transport type.
- """
+ """)
- @abc.abstractmethod
- def getargs(self, args):
+ def getargs(args):
"""return the value for arguments in <args>
returns a list of values (same order as <args>)"""
- @abc.abstractmethod
- def forwardpayload(self, fp):
+ def forwardpayload(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):
+ def mayberedirectstdio():
"""Context manager to possibly redirect stdio.
The context manager yields a file-object like object that receives
@@ -140,21 +136,18 @@
won't be captured.
"""
- @abc.abstractmethod
- def client(self):
+ def client():
"""Returns a string representation of this client (as bytes)."""
- @abc.abstractmethod
- def addcapabilities(self, repo, caps):
+ 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.
"""
- @abc.abstractmethod
- def checkperm(self, perm):
+ def checkperm(perm):
"""Validate that the client has permissions to perform a request.
The argument is the permission required to proceed. If the client
diff --git a/mercurial/wireprotoserver.py b/mercurial/wireprotoserver.py
--- a/mercurial/wireprotoserver.py
+++ b/mercurial/wireprotoserver.py
@@ -12,6 +12,9 @@
import threading
from .i18n import _
+from .thirdparty.zope import (
+ interface as zi,
+)
from . import (
encoding,
error,
@@ -58,7 +61,8 @@
return ''.join(chunks)
-class httpv1protocolhandler(wireprototypes.baseprotocolhandler):
+ at zi.implementer(wireprototypes.baseprotocolhandler)
+class httpv1protocolhandler(object):
def __init__(self, req, ui, checkperm):
self._req = req
self._ui = ui
@@ -574,7 +578,8 @@
},
}
-class httpv2protocolhandler(wireprototypes.baseprotocolhandler):
+ at zi.implementer(wireprototypes.baseprotocolhandler)
+class httpv2protocolhandler(object):
def __init__(self, req, ui, args=None):
self._req = req
self._ui = ui
@@ -737,7 +742,8 @@
fout.write(b'\n')
fout.flush()
-class sshv1protocolhandler(wireprototypes.baseprotocolhandler):
+ at zi.implementer(wireprototypes.baseprotocolhandler)
+class sshv1protocolhandler(object):
"""Handler for requests services via version 1 of SSH protocol."""
def __init__(self, ui, fin, fout):
self._ui = ui
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