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import http.client
import re
import urllib.error
import urllib.request
from inspect import cleandoc

import pytest

import setuptools.package_index

import distutils.errors


class TestPackageIndex:
    def test_regex(self):
        hash_url = 'http://other_url?:action=show_md5&amp;'
        hash_url += 'digest=0123456789abcdef0123456789abcdef'
        doc = """
            <a href="http://some_url">Name</a>
            (<a title="MD5 hash"
            href="{hash_url}">md5</a>)
        """.lstrip().format(**locals())
        assert setuptools.package_index.PYPI_MD5.match(doc)

    def test_bad_url_bad_port(self):
        index = setuptools.package_index.PackageIndex()
        url = 'http://127.0.0.1:0/nonesuch/test_package_index'
        with pytest.raises(Exception, match=re.escape(url)):
            v = index.open_url(url)
            assert isinstance(v, urllib.error.HTTPError)

    def test_bad_url_typo(self):
        # issue 16
        # easy_install inquant.contentmirror.plone breaks because of a typo
        # in its home URL
        index = setuptools.package_index.PackageIndex(hosts=('www.example.com',))

        url = 'url:%20https://svn.plone.org/svn/collective/inquant.contentmirror.plone/trunk'

        with pytest.raises(Exception, match=re.escape(url)):
            v = index.open_url(url)
            assert isinstance(v, urllib.error.HTTPError)

    def test_bad_url_bad_status_line(self):
        index = setuptools.package_index.PackageIndex(hosts=('www.example.com',))

        def _urlopen(*args):
            raise http.client.BadStatusLine('line')

        index.opener = _urlopen
        url = 'http://example.com'
        with pytest.raises(Exception, match=r'line'):
            index.open_url(url)

    def test_bad_url_double_scheme(self):
        """
        A bad URL with a double scheme should raise a DistutilsError.
        """
        index = setuptools.package_index.PackageIndex(hosts=('www.example.com',))

        # issue 20
        url = 'http://http://svn.pythonpaste.org/Paste/wphp/trunk'
        try:
            index.open_url(url)
        except distutils.errors.DistutilsError as error:
            msg = str(error)
            assert (
                'nonnumeric port' in msg
                or 'getaddrinfo failed' in msg
                or 'Name or service not known' in msg
            )
            return
        raise RuntimeError("Did not raise")

    def test_url_ok(self):
        index = setuptools.package_index.PackageIndex(hosts=('www.example.com',))
        url = 'file:///tmp/test_package_index'
        assert index.url_ok(url, True)

    def test_parse_bdist_wininst(self):
        parse = setuptools.package_index.parse_bdist_wininst

        actual = parse('reportlab-2.5.win32-py2.4.exe')
        expected = 'reportlab-2.5', '2.4', 'win32'
        assert actual == expected

        actual = parse('reportlab-2.5.win32.exe')
        expected = 'reportlab-2.5', None, 'win32'
        assert actual == expected

        actual = parse('reportlab-2.5.win-amd64-py2.7.exe')
        expected = 'reportlab-2.5', '2.7', 'win-amd64'
        assert actual == expected

        actual = parse('reportlab-2.5.win-amd64.exe')
        expected = 'reportlab-2.5', None, 'win-amd64'
        assert actual == expected

    def test__vcs_split_rev_from_url(self):
        """
        Test the basic usage of _vcs_split_rev_from_url
        """
        vsrfu = setuptools.package_index.PackageIndex._vcs_split_rev_from_url
        url, rev = vsrfu('https://example.com/bar@2995')
        assert url == 'https://example.com/bar'
        assert rev == '2995'

    def test_local_index(self, tmpdir):
        """
        local_open should be able to read an index from the file system.
        """
        index_file = tmpdir / 'index.html'
        with index_file.open('w') as f:
            f.write('<div>content</div>')
        url = 'file:' + urllib.request.pathname2url(str(tmpdir)) + '/'
        res = setuptools.package_index.local_open(url)
        assert 'content' in res.read()

    def test_egg_fragment(self):
        """
        EGG fragments must comply to PEP 440
        """
        epoch = [
            '',
            '1!',
        ]
        releases = [
            '0',
            '0.0',
            '0.0.0',
        ]
        pre = [
            'a0',
            'b0',
            'rc0',
        ]
        post = ['.post0']
        dev = [
            '.dev0',
        ]
        local = [
            ('', ''),
            ('+ubuntu.0', '+ubuntu.0'),
            ('+ubuntu-0', '+ubuntu.0'),
            ('+ubuntu_0', '+ubuntu.0'),
        ]
        versions = [
            [''.join([e, r, p, loc]) for loc in locs]
            for e in epoch
            for r in releases
            for p in sum([pre, post, dev], [''])
            for locs in local
        ]
        for v, vc in versions:
            dists = list(
                setuptools.package_index.distros_for_url(
                    'http://example.com/example-foo.zip#egg=example-foo-' + v
                )
            )
            assert dists[0].version == ''
            assert dists[1].version == vc

    def test_download_git_with_rev(self, tmp_path, fp):
        url = 'git+https://github.example/group/project@master#egg=foo'
        index = setuptools.package_index.PackageIndex()

        expected_dir = tmp_path / 'project@master'
        fp.register([
            'git',
            'clone',
            '--quiet',
            'https://github.example/group/project',
            expected_dir,
        ])
        fp.register(['git', '-C', expected_dir, 'checkout', '--quiet', 'master'])

        result = index.download(url, tmp_path)

        assert result == str(expected_dir)
        assert len(fp.calls) == 2

    def test_download_git_no_rev(self, tmp_path, fp):
        url = 'git+https://github.example/group/project#egg=foo'
        index = setuptools.package_index.PackageIndex()

        expected_dir = tmp_path / 'project'
        fp.register([
            'git',
            'clone',
            '--quiet',
            'https://github.example/group/project',
            expected_dir,
        ])
        index.download(url, tmp_path)

    def test_download_svn(self, tmp_path):
        url = 'svn+https://svn.example/project#egg=foo'
        index = setuptools.package_index.PackageIndex()

        msg = r".*SVN download is not supported.*"
        with pytest.raises(distutils.errors.DistutilsError, match=msg):
            index.download(url, tmp_path)


class TestContentCheckers:
    def test_md5(self):
        checker = setuptools.package_index.HashChecker.from_url(
            'http://foo/bar#md5=f12895fdffbd45007040d2e44df98478'
        )
        checker.feed('You should probably not be using MD5'.encode('ascii'))
        assert checker.hash.hexdigest() == 'f12895fdffbd45007040d2e44df98478'
        assert checker.is_valid()

    def test_other_fragment(self):
        "Content checks should succeed silently if no hash is present"
        checker = setuptools.package_index.HashChecker.from_url(
            'http://foo/bar#something%20completely%20different'
        )
        checker.feed('anything'.encode('ascii'))
        assert checker.is_valid()

    def test_blank_md5(self):
        "Content checks should succeed if a hash is empty"
        checker = setuptools.package_index.HashChecker.from_url('http://foo/bar#md5=')
        checker.feed('anything'.encode('ascii'))
        assert checker.is_valid()

    def test_get_hash_name_md5(self):
        checker = setuptools.package_index.HashChecker.from_url(
            'http://foo/bar#md5=f12895fdffbd45007040d2e44df98478'
        )
        assert checker.hash_name == 'md5'

    def test_report(self):
        checker = setuptools.package_index.HashChecker.from_url(
            'http://foo/bar#md5=f12895fdffbd45007040d2e44df98478'
        )
        rep = checker.report(lambda x: x, 'My message about %s')
        assert rep == 'My message about md5'


class TestPyPIConfig:
    def test_percent_in_password(self, tmp_home_dir):
        pypirc = tmp_home_dir / '.pypirc'
        pypirc.write_text(
            cleandoc(
                """
                [pypi]
                repository=https://pypi.org
                username=jaraco
                password=pity%
                """
            ),
            encoding="utf-8",
        )
        cfg = setuptools.package_index.PyPIConfig()
        cred = cfg.creds_by_repository['https://pypi.org']
        assert cred.username == 'jaraco'
        assert cred.password == 'pity%'


@pytest.mark.timeout(1)
def test_REL_DoS():
    """
    REL should not hang on a contrived attack string.
    """
    setuptools.package_index.REL.search('< rel=' + ' ' * 2**12)