~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2006 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Tests of the bzr serve command."""

import os

import signal

import subprocess

import sys

import threading

from bzrlib import (

    errors,

    osutils,

    revision as _mod_revision,

    )

from bzrlib.branch import Branch

from bzrlib.bzrdir import BzrDir

from bzrlib.errors import ParamikoNotPresent

from bzrlib.smart import medium

from bzrlib.tests import TestCaseWithTransport, TestSkipped

from bzrlib.transport import get_transport, remote

class TestBzrServe(TestCaseWithTransport):

    def assertInetServerShutsdownCleanly(self, process):

        """Shutdown the server process looking for errors."""

        # Shutdown the server: the server should shut down when it cannot read

        # from stdin anymore.

        process.stdin.close()

        # Hide stdin from the subprocess module, so it won't fail to close it.

        process.stdin = None

        result = self.finish_bzr_subprocess(process)

        self.assertEqual('', result[0])

        self.assertEqual('', result[1])

    def assertServerFinishesCleanly(self, process):

        """Shutdown the bzr serve instance process looking for errors."""

        # Shutdown the server

        result = self.finish_bzr_subprocess(process, retcode=3,

                                            send_signal=signal.SIGINT)

        self.assertEqual('', result[0])

        self.assertEqual('bzr: interrupted\n', result[1])

    def make_read_requests(self, branch):

        """Do some read only requests."""

        branch.lock_read()

        try:

            branch.repository.all_revision_ids()

            self.assertEqual(_mod_revision.NULL_REVISION,

                             _mod_revision.ensure_null(branch.last_revision()))

        finally:

            branch.unlock()

    def start_server_inet(self, extra_options=()):

        """Start a bzr server subprocess using the --inet option.

        :param extra_options: extra options to give the server.

        :return: a tuple with the bzr process handle for passing to

            finish_bzr_subprocess, a client for the server, and a transport.

        """

        # Serve from the current directory

        process = self.start_bzr_subprocess(['serve', '--inet'])

        # Connect to the server

        # We use this url because while this is no valid URL to connect to this

        # server instance, the transport needs a URL.

        url = 'bzr://localhost/'

        client_medium = medium.SmartSimplePipesClientMedium(

            process.stdout, process.stdin, url)

        transport = remote.RemoteTransport(url, medium=client_medium)

        return process, transport

    def start_server_port(self, extra_options=()):

        """Start a bzr server subprocess.

        :param extra_options: extra options to give the server.

        :return: a tuple with the bzr process handle for passing to

            finish_bzr_subprocess, and the base url for the server.

        """

        # Serve from the current directory

        args = ['serve', '--port', 'localhost:0']

        args.extend(extra_options)

        process = self.start_bzr_subprocess(args, skip_if_plan_to_signal=True)

        port_line = process.stdout.readline()

        prefix = 'listening on port: '

        self.assertStartsWith(port_line, prefix)

        port = int(port_line[len(prefix):])

        return process,'bzr://localhost:%d/' % port

    def test_bzr_serve_inet_readonly(self):

        """bzr server should provide a read only filesystem by default."""

        process, transport = self.start_server_inet()

        self.assertRaises(errors.TransportNotPossible, transport.mkdir, 'adir')

        self.assertInetServerShutsdownCleanly(process)

    def test_bzr_serve_inet_readwrite(self):

        # Make a branch

        self.make_branch('.')

        process, transport = self.start_server_inet(['--allow-writes'])

        # We get a working branch

        branch = BzrDir.open_from_transport(transport).open_branch()

        self.make_read_requests(branch)

        self.assertInetServerShutsdownCleanly(process)

    def test_bzr_serve_port_readonly(self):

        """bzr server should provide a read only filesystem by default."""

        process, url = self.start_server_port()

        transport = get_transport(url)

        self.assertRaises(errors.TransportNotPossible, transport.mkdir, 'adir')

        self.assertServerFinishesCleanly(process)

    def test_bzr_serve_port_readwrite(self):

        # Make a branch

        self.make_branch('.')

        process, url = self.start_server_port(['--allow-writes'])

        # Connect to the server

        branch = Branch.open(url)

        self.make_read_requests(branch)

        self.assertServerFinishesCleanly(process)

    def test_bzr_connect_to_bzr_ssh(self):

        """User acceptance that get_transport of a bzr+ssh:// behaves correctly.

        bzr+ssh:// should cause bzr to run a remote bzr smart server over SSH.

        """

        try:

            from bzrlib.transport.sftp import SFTPServer

        except ParamikoNotPresent:

            raise TestSkipped('Paramiko not installed')

        from bzrlib.tests.stub_sftp import StubServer

        # Make a branch

        self.make_branch('a_branch')

        # Start an SSH server

        self.command_executed = []

        # XXX: This is horrible -- we define a really dumb SSH server that

        # executes commands, and manage the hooking up of stdin/out/err to the

        # SSH channel ourselves.  Surely this has already been implemented

        # elsewhere?

        class StubSSHServer(StubServer):

            test = self

            def check_channel_exec_request(self, channel, command):

                self.test.command_executed.append(command)

                proc = subprocess.Popen(

                    command, shell=True, stdin=subprocess.PIPE,

                    stdout=subprocess.PIPE, stderr=subprocess.PIPE)

                # XXX: horribly inefficient, not to mention ugly.

                # Start a thread for each of stdin/out/err, and relay bytes from

                # the subprocess to channel and vice versa.

                def ferry_bytes(read, write, close):

                    while True:

                        bytes = read(1)

                        if bytes == '':

                            close()

                            break

                        write(bytes)

                file_functions = [

                    (channel.recv, proc.stdin.write, proc.stdin.close),

                    (proc.stdout.read, channel.sendall, channel.close),

                    (proc.stderr.read, channel.sendall_stderr, channel.close)]

                for read, write, close in file_functions:

                    t = threading.Thread(

                        target=ferry_bytes, args=(read, write, close))

                    t.start()

                return True

        ssh_server = SFTPServer(StubSSHServer)

        # XXX: We *don't* want to override the default SSH vendor, so we set

        # _vendor to what _get_ssh_vendor returns.

        ssh_server.setUp()

        self.addCleanup(ssh_server.tearDown)

        port = ssh_server._listener.port

        # Access the branch via a bzr+ssh URL.  The BZR_REMOTE_PATH environment

        # variable is used to tell bzr what command to run on the remote end.

        path_to_branch = osutils.abspath('a_branch')

        orig_bzr_remote_path = os.environ.get('BZR_REMOTE_PATH')

        bzr_remote_path = self.get_bzr_path()

        if sys.platform == 'win32':

            bzr_remote_path = sys.executable + ' ' + self.get_bzr_path()

        os.environ['BZR_REMOTE_PATH'] = bzr_remote_path

        try:

            if sys.platform == 'win32':

                path_to_branch = os.path.splitdrive(path_to_branch)[1]

            branch = Branch.open(

                'bzr+ssh://fred:secret@localhost:%d%s' % (port, path_to_branch))

            self.make_read_requests(branch)

            # Check we can perform write operations

            branch.bzrdir.root_transport.mkdir('foo')

        finally:

            # Restore the BZR_REMOTE_PATH environment variable back to its

            # original state.

            if orig_bzr_remote_path is None:

                del os.environ['BZR_REMOTE_PATH']

            else:

                os.environ['BZR_REMOTE_PATH'] = orig_bzr_remote_path

        self.assertEqual(

            ['%s serve --inet --directory=/ --allow-writes'

             % bzr_remote_path],

            self.command_executed)