tests/test-wireproto.py

wireproto: introduce type for raw byte responses (API)

Right now we simply return a str/bytes instance for simple
responses. I want all wire protocol response types to be strongly
typed. So let's invent and use a type for raw bytes responses.

.. api::

   Wire protocol command handlers now return a
   wireprototypes.bytesresponse instead of a raw bytes instance.
   Protocol handlers will continue handling bytes instances. However,
   any extensions wrapping wire protocol commands will need to handle
   the new type.

Differential Revision: https://phab.mercurial-scm.org/D2089

from __future__ import absolute_import, print_function

from mercurial import (
    error,
    util,
    wireproto,
    wireprototypes,
)
stringio = util.stringio

class proto(object):
    def __init__(self, args):
        self.args = args
    def getargs(self, spec):
        args = self.args
        args.setdefault('*', {})
        names = spec.split()
        return [args[n] for n in names]

class clientpeer(wireproto.wirepeer):
    def __init__(self, serverrepo):
        self.serverrepo = serverrepo

    @property
    def ui(self):
        return self.serverrepo.ui

    def url(self):
        return 'test'

    def local(self):
        return None

    def peer(self):
        return self

    def canpush(self):
        return True

    def close(self):
        pass

    def capabilities(self):
        return ['batch']

    def _call(self, cmd, **args):
        res = wireproto.dispatch(self.serverrepo, proto(args), cmd)
        if isinstance(res, wireprototypes.bytesresponse):
            return res.data
        elif isinstance(res, bytes):
            return res
        else:
            raise error.Abort('dummy client does not support response type')

    def _callstream(self, cmd, **args):
        return stringio(self._call(cmd, **args))

    @wireproto.batchable
    def greet(self, name):
        f = wireproto.future()
        yield {'name': mangle(name)}, f
        yield unmangle(f.value)

class serverrepo(object):
    def greet(self, name):
        return "Hello, " + name

    def filtered(self, name):
        return self

def mangle(s):
    return ''.join(chr(ord(c) + 1) for c in s)
def unmangle(s):
    return ''.join(chr(ord(c) - 1) for c in s)

def greet(repo, proto, name):
    return mangle(repo.greet(unmangle(name)))

wireproto.commands['greet'] = (greet, 'name',)

srv = serverrepo()
clt = clientpeer(srv)

print(clt.greet("Foobar"))
b = clt.iterbatch()
map(b.greet, ('Fo, =;:<o', 'Bar'))
b.submit()
print([r for r in b.results()])