# -*- coding: utf-8 -*-

# 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 3 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, see <http://www.gnu.org/licenses/>.

"""

kallithea.lib.hooks

~~~~~~~~~~~~~~~~~~~

Hooks run by Kallithea

This file was forked by the Kallithea project in July 2014.

Original author and date, and relevant copyright and licensing information is below:

:created_on: Aug 6, 2010

:author: marcink

:copyright: (c) 2013 RhodeCode GmbH, and others.

:license: GPLv3, see LICENSE.md for more details.

"""

import os

import sys

import time

import binascii

from kallithea.lib.vcs.utils.hgcompat import nullrev, revrange

from kallithea.lib import helpers as h

from kallithea.lib.utils import action_logger

from kallithea.lib.vcs.backends.base import EmptyChangeset

from kallithea.lib.exceptions import HTTPLockedRC, UserCreationError

from kallithea.lib.utils2 import safe_str, _extract_extras

from kallithea.model.db import Repository, User

def _get_scm_size(alias, root_path):

    if not alias.startswith('.'):

        alias += '.'

    size_scm, size_root = 0, 0

    for path, dirs, files in os.walk(safe_str(root_path)):

        if path.find(alias) != -1:

            for f in files:

                try:

                    size_scm += os.path.getsize(os.path.join(path, f))

                except OSError:

                    pass

        else:

            for f in files:

                try:

                    size_root += os.path.getsize(os.path.join(path, f))

                except OSError:

                    pass

    size_scm_f = h.format_byte_size(size_scm)

    size_root_f = h.format_byte_size(size_root)

    size_total_f = h.format_byte_size(size_root + size_scm)

    return size_scm_f, size_root_f, size_total_f

def repo_size(ui, repo, hooktype=None, **kwargs):

    """

    Presents size of repository after push

    :param ui:

    :param repo:

    :param hooktype:

    """

    size_hg_f, size_root_f, size_total_f = _get_scm_size('.hg', repo.root)

    last_cs = repo[len(repo) - 1]

    msg = ('Repository size .hg:%s repo:%s total:%s\n'

           'Last revision is now r%s:%s\n') % (

        size_hg_f, size_root_f, size_total_f, last_cs.rev(), last_cs.hex()[:12]

    )

    sys.stdout.write(msg)

def pre_push(ui, repo, **kwargs):

    # pre push function, currently used to ban pushing when

    # repository is locked

    ex = _extract_extras()

    usr = User.get_by_username(ex.username)

    if ex.locked_by[0] and usr.user_id != int(ex.locked_by[0]):

        locked_by = User.get(ex.locked_by[0]).username

        # this exception is interpreted in git/hg middlewares and based

        # on that proper return code is server to client

        _http_ret = HTTPLockedRC(ex.repository, locked_by)

        if str(_http_ret.code).startswith('2'):

            #2xx Codes don't raise exceptions

            sys.stdout.write(_http_ret.title)

        else:

            raise _http_ret

def pre_pull(ui, repo, **kwargs):

    ex = _extract_extras()

    if ex.locked_by[0]:

        locked_by = User.get(ex.locked_by[0]).username

        # this exception is interpreted in git/hg middlewares and based

        # on that proper return code is server to client

        _http_ret = HTTPLockedRC(ex.repository, locked_by)

        if str(_http_ret.code).startswith('2'):

            #2xx Codes don't raise exceptions

            sys.stdout.write(_http_ret.title)

        else:

            raise _http_ret

def log_pull_action(ui, repo, **kwargs):

    """

    Logs user last pull action

    :param ui:

    :param repo:

    """

    ex = _extract_extras()

    user = User.get_by_username(ex.username)

    action = 'pull'

    action_logger(user, action, ex.repository, ex.ip, commit=True)

    # extension hook call

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'PULL_HOOK', None)

    if callable(callback):

        kw = {}

        kw.update(ex)

        callback(**kw)

    if ex.make_lock is not None and ex.make_lock:

        Repository.lock(Repository.get_by_repo_name(ex.repository), user.user_id)

        #msg = 'Made lock on repo `%s`' % repository

        #sys.stdout.write(msg)

    if ex.locked_by[0]:

        locked_by = User.get(ex.locked_by[0]).username

        _http_ret = HTTPLockedRC(ex.repository, locked_by)

        if str(_http_ret.code).startswith('2'):

            #2xx Codes don't raise exceptions

            sys.stdout.write(_http_ret.title)

    return 0

def log_push_action(ui, repo, **kwargs):

    """

    Register that changes have been pushed.

    Mercurial invokes this directly as a hook, git uses handle_git_receive.

    """

    ex = _extract_extras()

    action_tmpl = ex.action + ':%s'

    revs = []

    if ex.scm == 'hg':

        node = kwargs['node']

        def get_revs(repo, rev_opt):

            if rev_opt:

                revs = revrange(repo, rev_opt)

                if len(revs) == 0:

                    return (nullrev, nullrev)

                return max(revs), min(revs)

            else:

                return len(repo) - 1, 0

        stop, start = get_revs(repo, [node + ':'])

        _h = binascii.hexlify

        revs = [_h(repo[r].node()) for r in xrange(start, stop + 1)]

    elif ex.scm == 'git':

        revs = kwargs.get('_git_revs', [])

        if '_git_revs' in kwargs:

            kwargs.pop('_git_revs')

    action = action_tmpl % ','.join(revs)

    action_logger(ex.username, action, ex.repository, ex.ip, commit=True)

    # extension hook call

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'PUSH_HOOK', None)

    if callable(callback):

        kw = {'pushed_revs': revs}

        kw.update(ex)

        callback(**kw)

    if ex.make_lock is not None and not ex.make_lock:

        Repository.unlock(Repository.get_by_repo_name(ex.repository))

        msg = 'Released lock on repo `%s`\n' % ex.repository

        sys.stdout.write(msg)

    if ex.locked_by[0]:

        locked_by = User.get(ex.locked_by[0]).username

        _http_ret = HTTPLockedRC(ex.repository, locked_by)

        if str(_http_ret.code).startswith('2'):

            #2xx Codes don't raise exceptions

            sys.stdout.write(_http_ret.title)

    return 0

def log_create_repository(repository_dict, created_by, **kwargs):

    """

    Post create repository Hook.

    :param repository: dict dump of repository object

    :param created_by: username who created repository

    available keys of repository_dict:

     'repo_type',

     'description',

     'private',

     'created_on',

     'enable_downloads',

     'repo_id',

     'user_id',

     'enable_statistics',

     'clone_uri',

     'fork_id',

     'group_id',

     'repo_name'

    """

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'CREATE_REPO_HOOK', None)

    if callable(callback):

        kw = {}

        kw.update(repository_dict)

        kw.update({'created_by': created_by})

        kw.update(kwargs)

        return callback(**kw)

    return 0

def check_allowed_create_user(user_dict, created_by, **kwargs):

    # pre create hooks

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'PRE_CREATE_USER_HOOK', None)

    if callable(callback):

        allowed, reason = callback(created_by=created_by, **user_dict)

        if not allowed:

            raise UserCreationError(reason)

def log_create_user(user_dict, created_by, **kwargs):

    """

    Post create user Hook.

    :param user_dict: dict dump of user object

    available keys for user_dict:

     'username',

     'full_name_or_username',

     'full_contact',

     'user_id',

     'name',

     'firstname',

     'short_contact',

     'admin',

     'lastname',

     'ip_addresses',

     'ldap_dn',

     'email',

     'api_key',

     'last_login',

     'full_name',

     'active',

     'password',

     'emails',

     'inherit_default_permissions'

    """

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'CREATE_USER_HOOK', None)

    if callable(callback):

        return callback(created_by=created_by, **user_dict)

    return 0

def log_delete_repository(repository_dict, deleted_by, **kwargs):

    """

    Post delete repository Hook.

    :param repository: dict dump of repository object

    :param deleted_by: username who deleted the repository

    available keys of repository_dict:

     'repo_type',

     'description',

     'private',

     'created_on',

     'enable_downloads',

     'repo_id',

     'user_id',

     'enable_statistics',

     'clone_uri',

     'fork_id',

     'group_id',

     'repo_name'

    """

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'DELETE_REPO_HOOK', None)

    if callable(callback):

        kw = {}

        kw.update(repository_dict)

        kw.update({'deleted_by': deleted_by,

                   'deleted_on': time.time()})

        kw.update(kwargs)

        return callback(**kw)

    return 0

def log_delete_user(user_dict, deleted_by, **kwargs):

    """

    Post delete user Hook.

    :param user_dict: dict dump of user object

    available keys for user_dict:

     'username',

     'full_name_or_username',

     'full_contact',

     'user_id',

     'name',

     'firstname',

     'short_contact',

     'admin',

     'lastname',

     'ip_addresses',

     'ldap_dn',

     'email',

     'api_key',

     'last_login',

     'full_name',

     'active',

     'password',

     'emails',

     'inherit_default_permissions'

    """

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'DELETE_USER_HOOK', None)

    if callable(callback):

        return callback(deleted_by=deleted_by, **user_dict)

    return 0

def handle_git_pre_receive(repo_path, revs, env):

    return handle_git_receive(repo_path, revs, env, hook_type='pre')

def handle_git_post_receive(repo_path, revs, env):

    return handle_git_receive(repo_path, revs, env, hook_type='post')

def handle_git_receive(repo_path, revs, env, hook_type):

    """

    A really hacky method that is run by git post-receive hook and logs

    an push action together with pushed revisions. It's executed by subprocess

    thus needs all info to be able to create a on the fly pylons environment,

    connect to database and run the logging code. Hacky as sh*t but works.

    :param repo_path:

    :param revs:

    :param env:

    """

    from paste.deploy import appconfig

    from sqlalchemy import engine_from_config

    from kallithea.config.environment import load_environment

    from kallithea.model import init_model

    from kallithea.model.db import Ui

    from kallithea.lib.utils import make_ui

    extras = _extract_extras(env)

    path, ini_name = os.path.split(extras['config'])

    conf = appconfig('config:%s' % ini_name, relative_to=path)

    load_environment(conf.global_conf, conf.local_conf, test_env=False,

                     test_index=False)

    engine = engine_from_config(conf, 'sqlalchemy.db1.')

    init_model(engine)

    baseui = make_ui('db')

    # fix if it's not a bare repo

    if repo_path.endswith(os.sep + '.git'):

        repo_path = repo_path[:-5]

    repo = Repository.get_by_full_path(repo_path)

    if not repo:

        raise OSError('Repository %s not found in database'

                      % (safe_str(repo_path)))

    _hooks = dict(baseui.configitems('hooks')) or {}

    if hook_type == 'pre':

        repo = repo.scm_instance

    else:

        #post push shouldn't use the cached instance never

        repo = repo.scm_instance_no_cache()

    if hook_type == 'pre':

        pre_push(baseui, repo)

    # if push hook is enabled via web interface

    elif hook_type == 'post' and _hooks.get(Ui.HOOK_PUSH):

        rev_data = []

        for l in revs:

            old_rev, new_rev, ref = l.split(' ')

            _ref_data = ref.split('/')

            if _ref_data[1] in ['tags', 'heads']:

                rev_data.append({'old_rev': old_rev,

                                 'new_rev': new_rev,

                                 'ref': ref,

                                 'type': _ref_data[1],

                                 'name': _ref_data[2].strip()})

        git_revs = []

        for push_ref in rev_data:

            _type = push_ref['type']

            if _type == 'heads':

                if push_ref['old_rev'] == EmptyChangeset().raw_id:

                    # update the symbolic ref if we push new repo

                    if repo.is_empty():

                        repo._repo.refs.set_symbolic_ref('HEAD',

                                            'refs/heads/%s' % push_ref['name'])

                    cmd = ['for-each-ref', '--format=%(refname)','refs/heads/*']

                    heads = repo.run_git_command(cmd)[0]

                    cmd = ['log', push_ref['new_rev'],

                           '--reverse', '--pretty=format:%H', '--not']

                    heads = heads.replace(push_ref['ref'], '')

                    for l in heads.splitlines():

                        cmd.append(l.strip())

                    git_revs += repo.run_git_command(cmd)[0].splitlines()

                elif push_ref['new_rev'] == EmptyChangeset().raw_id:

                    #delete branch case

                    git_revs += ['delete_branch=>%s' % push_ref['name']]

                else:

                    cmd = ['log', '%(old_rev)s..%(new_rev)s' % push_ref,

                           '--reverse', '--pretty=format:%H']

                    git_revs += repo.run_git_command(cmd)[0].splitlines()

            elif _type == 'tags':

                git_revs += ['tag=>%s' % push_ref['name']]

        log_push_action(baseui, repo, _git_revs=git_revs)

# -*- coding: utf-8 -*-

# 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 3 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, see <http://www.gnu.org/licenses/>.

"""

kallithea.lib.middleware.simplegit

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

SimpleGit middleware for handling git protocol request (push/clone etc.)

It's implemented with basic auth function

This file was forked by the Kallithea project in July 2014.

Original author and date, and relevant copyright and licensing information is below:

:created_on: Apr 28, 2010

:author: marcink

:copyright: (c) 2013 RhodeCode GmbH, and others.

:license: GPLv3, see LICENSE.md for more details.

"""

import os

import re

import logging

import traceback

from paste.httpheaders import REMOTE_USER, AUTH_TYPE

from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError, \

    HTTPNotAcceptable

from kallithea.model.db import User, Ui

from kallithea.lib.utils2 import safe_str, safe_unicode, fix_PATH, get_server_url,\

    _set_extras

from kallithea.lib.base import BaseVCSController, WSGIResultCloseCallback

from kallithea.lib.utils import make_ui, is_valid_repo

from kallithea.lib.exceptions import HTTPLockedRC

from kallithea.lib.hooks import pre_pull

from kallithea.lib import auth_modules

log = logging.getLogger(__name__)

GIT_PROTO_PAT = re.compile(r'^/(.+)/(info/refs|git-upload-pack|git-receive-pack)')

def is_git(environ):

    path_info = environ['PATH_INFO']

    isgit_path = GIT_PROTO_PAT.match(path_info)

    log.debug('pathinfo: %s detected as Git %s',

        path_info, isgit_path is not None

    )

    return isgit_path

class SimpleGit(BaseVCSController):

    def _handle_request(self, environ, start_response):

        if not is_git(environ):

            return self.application(environ, start_response)

        if not self._check_ssl(environ):

            return HTTPNotAcceptable('SSL REQUIRED !')(environ, start_response)

        ip_addr = self._get_ip_addr(environ)

        username = None

        self._git_first_op = False

        # skip passing error to error controller

        environ['pylons.status_code_redirect'] = True

        #======================================================================

        # EXTRACT REPOSITORY NAME FROM ENV

        #======================================================================

        try:

            str_repo_name = self.__get_repository(environ)

            repo_name = safe_unicode(str_repo_name)

            log.debug('Extracted repo name is %s', repo_name)

        except Exception as e:

            log.error('error extracting repo_name: %r', e)

            return HTTPInternalServerError()(environ, start_response)

        # quick check if that dir exists...

        if not is_valid_repo(repo_name, self.basepath, 'git'):

            return HTTPNotFound()(environ, start_response)

        #======================================================================

        # GET ACTION PULL or PUSH

        #======================================================================

        action = self.__get_action(environ)

        #======================================================================

        # CHECK ANONYMOUS PERMISSION

        #======================================================================

        if action in ['pull', 'push']:

            anonymous_user = self.__get_user('default')

            username = anonymous_user.username

            if anonymous_user.active:

                # ONLY check permissions if the user is activated

                anonymous_perm = self._check_permission(action, anonymous_user,

                                                        repo_name, ip_addr)

            else:

                anonymous_perm = False

            if not anonymous_user.active or not anonymous_perm:

                if not anonymous_user.active:

                    log.debug('Anonymous access is disabled, running '

                              'authentication')

                if not anonymous_perm:

                    log.debug('Not enough credentials to access this '

                              'repository as anonymous user')

                username = None

                #==============================================================

                # DEFAULT PERM FAILED OR ANONYMOUS ACCESS IS DISABLED SO WE

                # NEED TO AUTHENTICATE AND ASK FOR AUTH USER PERMISSIONS

                #==============================================================

                # try to auth based on environ, container auth methods

                log.debug('Running PRE-AUTH for container based authentication')

                pre_auth = auth_modules.authenticate('', '', environ)

                if pre_auth is not None and pre_auth.get('username'):

                    username = pre_auth['username']

                log.debug('PRE-AUTH got %s as username', username)

                # If not authenticated by the container, running basic auth

                if not username:

                    self.authenticate.realm = \

                        safe_str(self.config['realm'])

                    result = self.authenticate(environ)

                    if isinstance(result, str):

                        AUTH_TYPE.update(environ, 'basic')

                        REMOTE_USER.update(environ, result)

                        username = result

                    else:

                        return result.wsgi_application(environ, start_response)

                #==============================================================

                # CHECK PERMISSIONS FOR THIS REQUEST USING GIVEN USERNAME

                #==============================================================

                try:

                    user = self.__get_user(username)

                    if user is None or not user.active:

                        return HTTPForbidden()(environ, start_response)

                    username = user.username

                except Exception:

                    log.error(traceback.format_exc())

                    return HTTPInternalServerError()(environ, start_response)

                #check permissions for this repository

                perm = self._check_permission(action, user, repo_name, ip_addr)

                if not perm:

                    return HTTPForbidden()(environ, start_response)

        # extras are injected into UI object and later available

        # in hooks executed by kallithea

        from kallithea import CONFIG

        server_url = get_server_url(environ)

        extras = {

            'ip': ip_addr,

            'username': username,

            'action': action,

            'repository': repo_name,

            'scm': 'git',

            'config': CONFIG['__file__'],

            'server_url': server_url,

            'make_lock': None,

            'locked_by': [None, None]

        }

        #===================================================================

        # GIT REQUEST HANDLING

        #===================================================================

        repo_path = os.path.join(safe_str(self.basepath),str_repo_name)

        log.debug('Repository path is %s', repo_path)

        # CHECK LOCKING only if it's not ANONYMOUS USER

        if username != User.DEFAULT_USER:

            log.debug('Checking locking on repository')

            (make_lock,

             locked,

             locked_by) = self._check_locking_state(

                            environ=environ, action=action,

                            repo=repo_name, user_id=user.user_id

                       )

            # store the make_lock for later evaluation in hooks

            extras.update({'make_lock': make_lock,

                           'locked_by': locked_by})

        fix_PATH()

        log.debug('HOOKS extras is %s', extras)

        baseui = make_ui('db')

        self.__inject_extras(repo_path, baseui, extras)

        try:

            self._handle_githooks(repo_name, action, baseui, environ)

            log.info('%s action on Git repo "%s" by "%s" from %s',

                     action, str_repo_name, safe_str(username), ip_addr)

            app = self.__make_app(repo_name, repo_path, extras)

            result = app(environ, start_response)

            if action == 'push':

                result = WSGIResultCloseCallback(result,

                    lambda: self._invalidate_cache(repo_name))

            return result

        except HTTPLockedRC as e:

            return e(environ, start_response)

        except Exception:

            log.error(traceback.format_exc())

            return HTTPInternalServerError()(environ, start_response)

    def __make_app(self, repo_name, repo_path, extras):

        """

        Make an wsgi application using dulserver

        :param repo_name: name of the repository

        :param repo_path: full path to the repository

        """

        from kallithea.lib.middleware.pygrack import make_wsgi_app

        app = make_wsgi_app(

            repo_root=safe_str(self.basepath),

            repo_name=repo_name,

            extras=extras,

        )

        return app

    def __get_repository(self, environ):

        """

        Gets repository name out of PATH_INFO header

        :param environ: environ where PATH_INFO is stored

        """

        try:

            environ['PATH_INFO'] = self._get_by_id(environ['PATH_INFO'])

            repo_name = GIT_PROTO_PAT.match(environ['PATH_INFO']).group(1)

        except Exception:

            log.error(traceback.format_exc())

            raise

        return repo_name

    def __get_user(self, username):

        return User.get_by_username(username)

    def __get_action(self, environ):

        """

        Maps git request commands into a pull or push command.

        :param environ:

        """

        service = environ['QUERY_STRING'].split('=')

        if len(service) > 1:

            service_cmd = service[1]

            mapping = {

                'git-receive-pack': 'push',

                'git-upload-pack': 'pull',

            }

            op = mapping[service_cmd]

            self._git_stored_op = op

            return op

        else:

            # try to fallback to stored variable as we don't know if the last

            # operation is pull/push

            op = getattr(self, '_git_stored_op', 'pull')

        return op

    def _handle_githooks(self, repo_name, action, baseui, environ):

        """

        Handles pull action, push is handled by post-receive hook

        """

        from kallithea.lib.hooks import log_pull_action

        service = environ['QUERY_STRING'].split('=')

        if len(service) < 2:

            return

        from kallithea.model.db import Repository

        _repo = Repository.get_by_repo_name(repo_name)

        _repo = _repo.scm_instance

        _hooks = dict(baseui.configitems('hooks')) or {}

        if action == 'pull':

            # stupid git, emulate pre-pull hook !

            pre_pull(ui=baseui, repo=_repo._repo)

        if action == 'pull' and _hooks.get(Ui.HOOK_PULL):

            log_pull_action(ui=baseui, repo=_repo._repo)

    def __inject_extras(self, repo_path, baseui, extras={}):

        """

        Injects some extra params into baseui instance

        :param baseui: baseui instance

        :param extras: dict with extra params to put into baseui

        """

        _set_extras(extras)

# -*- coding: utf-8 -*-

# 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 3 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, see <http://www.gnu.org/licenses/>.

"""

kallithea.lib.middleware.simplehg

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

SimpleHg middleware for handling mercurial protocol request

(push/clone etc.). It's implemented with basic auth function

This file was forked by the Kallithea project in July 2014.

Original author and date, and relevant copyright and licensing information is below:

:created_on: Apr 28, 2010

:author: marcink

:copyright: (c) 2013 RhodeCode GmbH, and others.

:license: GPLv3, see LICENSE.md for more details.

"""

import os

import logging

import traceback

from paste.httpheaders import REMOTE_USER, AUTH_TYPE

from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError, \

    HTTPNotAcceptable

from kallithea.model.db import User

from kallithea.lib.utils2 import safe_str, safe_unicode, fix_PATH, get_server_url,\

    _set_extras

from kallithea.lib.base import BaseVCSController, WSGIResultCloseCallback

from kallithea.lib.utils import make_ui, is_valid_repo, ui_sections

from kallithea.lib.vcs.utils.hgcompat import RepoError, hgweb_mod

from kallithea.lib.exceptions import HTTPLockedRC

from kallithea.lib import auth_modules

log = logging.getLogger(__name__)

def is_mercurial(environ):

    """

    Returns True if request's target is mercurial server - header

    ``HTTP_ACCEPT`` of such request would start with ``application/mercurial``.

    """

    http_accept = environ.get('HTTP_ACCEPT')

    path_info = environ['PATH_INFO']

    if http_accept and http_accept.startswith('application/mercurial'):

        ishg_path = True

    else:

        ishg_path = False

    log.debug('pathinfo: %s detected as Mercurial %s',

        path_info, ishg_path

    )

    return ishg_path

class SimpleHg(BaseVCSController):

    def _handle_request(self, environ, start_response):

        if not is_mercurial(environ):

            return self.application(environ, start_response)

        if not self._check_ssl(environ):

            return HTTPNotAcceptable('SSL REQUIRED !')(environ, start_response)

        ip_addr = self._get_ip_addr(environ)

        username = None

        # skip passing error to error controller

        environ['pylons.status_code_redirect'] = True

        #======================================================================

        # EXTRACT REPOSITORY NAME FROM ENV

        #======================================================================

        try:

            str_repo_name = environ['REPO_NAME'] = self.__get_repository(environ)

            assert isinstance(str_repo_name, str), str_repo_name

            repo_name = safe_unicode(str_repo_name)

            assert safe_str(repo_name) == str_repo_name, (str_repo_name, repo_name)

            log.debug('Extracted repo name is %s', repo_name)

        except Exception as e:

            log.error('error extracting repo_name: %r', e)

            return HTTPInternalServerError()(environ, start_response)