view mercurial/urllibcompat.py @ 48598:a6f16ec07ed7

stream-clone: add a explicit test for format change during stream clone

They are different kind of requirements, the one which impact the data storage
and are relevant to the files being streamed and the one which does not. For
example some requirements are only relevant to the working copy, like sparse, or
dirstate-v2.

Since they are irrelevant to the content being streamed, they do not prevent the
receiving side to use streaming clone and mercurial skip adverting them over
the wire and, ideally, within the bundle.

In addition, this let the client decide to use whichever format it desire for
the part that does not affect the store itself. So the configuration related to
these format are used as normal when doing a streaming clone.

In practice, the feature was not really tested and is badly broken with bundle-2,
since the requirements are not filtered out from the stream bundle.

So we start with adding simple tests as a good base before the fix and adjust
the feature.

Differential Revision: https://phab.mercurial-scm.org/D12029

# urllibcompat.py - adapters to ease using urllib2 on Py2 and urllib on Py3
#
# Copyright 2017 Google, Inc.
#
# 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 .pycompat import getattr
from . import pycompat

_sysstr = pycompat.sysstr


class _pycompatstub(object):
    def __init__(self):
        self._aliases = {}

    def _registeraliases(self, origin, items):
        """Add items that will be populated at the first access"""
        items = map(_sysstr, items)
        self._aliases.update(
            (item.replace('_', '').lower(), (origin, item)) for item in items
        )

    def _registeralias(self, origin, attr, name):
        """Alias ``origin``.``attr`` as ``name``"""
        self._aliases[_sysstr(name)] = (origin, _sysstr(attr))

    def __getattr__(self, name):
        try:
            origin, item = self._aliases[name]
        except KeyError:
            raise AttributeError(name)
        self.__dict__[name] = obj = getattr(origin, item)
        return obj


httpserver = _pycompatstub()
urlreq = _pycompatstub()
urlerr = _pycompatstub()

if pycompat.ispy3:
    import urllib.parse

    urlreq._registeraliases(
        urllib.parse,
        (
            b"splitattr",
            b"splitpasswd",
            b"splitport",
            b"splituser",
            b"urlparse",
            b"urlunparse",
        ),
    )
    urlreq._registeralias(urllib.parse, b"parse_qs", b"parseqs")
    urlreq._registeralias(urllib.parse, b"parse_qsl", b"parseqsl")
    urlreq._registeralias(urllib.parse, b"unquote_to_bytes", b"unquote")
    import urllib.request

    urlreq._registeraliases(
        urllib.request,
        (
            b"AbstractHTTPHandler",
            b"BaseHandler",
            b"build_opener",
            b"FileHandler",
            b"FTPHandler",
            b"ftpwrapper",
            b"HTTPHandler",
            b"HTTPSHandler",
            b"install_opener",
            b"pathname2url",
            b"HTTPBasicAuthHandler",
            b"HTTPDigestAuthHandler",
            b"HTTPPasswordMgrWithDefaultRealm",
            b"ProxyHandler",
            b"Request",
            b"url2pathname",
            b"urlopen",
        ),
    )
    import urllib.response

    urlreq._registeraliases(
        urllib.response,
        (
            b"addclosehook",
            b"addinfourl",
        ),
    )
    import urllib.error

    urlerr._registeraliases(
        urllib.error,
        (
            b"HTTPError",
            b"URLError",
        ),
    )
    import http.server

    httpserver._registeraliases(
        http.server,
        (
            b"HTTPServer",
            b"BaseHTTPRequestHandler",
            b"SimpleHTTPRequestHandler",
            b"CGIHTTPRequestHandler",
        ),
    )

    # urllib.parse.quote() accepts both str and bytes, decodes bytes
    # (if necessary), and returns str. This is wonky. We provide a custom
    # implementation that only accepts bytes and emits bytes.
    def quote(s, safe='/'):
        # bytestr has an __iter__ that emits characters. quote_from_bytes()
        # does an iteration and expects ints. We coerce to bytes to appease it.
        if isinstance(s, pycompat.bytestr):
            s = bytes(s)
        s = urllib.parse.quote_from_bytes(s, safe=safe)
        return s.encode('ascii', 'strict')

    # urllib.parse.urlencode() returns str. We use this function to make
    # sure we return bytes.
    def urlencode(query, doseq=False):
        s = urllib.parse.urlencode(query, doseq=doseq)
        return s.encode('ascii')

    urlreq.quote = quote
    urlreq.urlencode = urlencode

    def getfullurl(req):
        return req.full_url

    def gethost(req):
        return req.host

    def getselector(req):
        return req.selector

    def getdata(req):
        return req.data

    def hasdata(req):
        return req.data is not None


else:
    # pytype: disable=import-error
    import BaseHTTPServer
    import CGIHTTPServer
    import SimpleHTTPServer
    import urllib2
    import urllib
    import urlparse

    # pytype: enable=import-error

    urlreq._registeraliases(
        urllib,
        (
            b"addclosehook",
            b"addinfourl",
            b"ftpwrapper",
            b"pathname2url",
            b"quote",
            b"splitattr",
            b"splitpasswd",
            b"splitport",
            b"splituser",
            b"unquote",
            b"url2pathname",
            b"urlencode",
        ),
    )
    urlreq._registeraliases(
        urllib2,
        (
            b"AbstractHTTPHandler",
            b"BaseHandler",
            b"build_opener",
            b"FileHandler",
            b"FTPHandler",
            b"HTTPBasicAuthHandler",
            b"HTTPDigestAuthHandler",
            b"HTTPHandler",
            b"HTTPPasswordMgrWithDefaultRealm",
            b"HTTPSHandler",
            b"install_opener",
            b"ProxyHandler",
            b"Request",
            b"urlopen",
        ),
    )
    urlreq._registeraliases(
        urlparse,
        (
            b"urlparse",
            b"urlunparse",
        ),
    )
    urlreq._registeralias(urlparse, b"parse_qs", b"parseqs")
    urlreq._registeralias(urlparse, b"parse_qsl", b"parseqsl")
    urlerr._registeraliases(
        urllib2,
        (
            b"HTTPError",
            b"URLError",
        ),
    )
    httpserver._registeraliases(
        BaseHTTPServer,
        (
            b"HTTPServer",
            b"BaseHTTPRequestHandler",
        ),
    )
    httpserver._registeraliases(
        SimpleHTTPServer, (b"SimpleHTTPRequestHandler",)
    )
    httpserver._registeraliases(CGIHTTPServer, (b"CGIHTTPRequestHandler",))

    def gethost(req):
        return req.get_host()

    def getselector(req):
        return req.get_selector()

    def getfullurl(req):
        return req.get_full_url()

    def getdata(req):
        return req.get_data()

    def hasdata(req):
        return req.has_data()