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__init__.py
248 lines | 7.9 KiB | text/x-python | PythonLexer
# -*- coding: utf-8 -*-
# Copyright (C) 2014-2017 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# 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 Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/
"""
Various version Control System version lib (vcs) management abstraction layer
for Python. Build with server client architecture.
"""
VERSION = (0, 5, 0, 'dev')
__version__ = '.'.join((str(each) for each in VERSION[:4]))
__all__ = [
'get_version', 'get_vcs_instance', 'get_backend',
'VCSError', 'RepositoryError', 'CommitError'
]
import atexit
import logging
import subprocess32
import time
import urlparse
from cStringIO import StringIO
from rhodecode.lib.vcs.conf import settings
from rhodecode.lib.vcs.backends import get_vcs_instance, get_backend
from rhodecode.lib.vcs.exceptions import (
VCSError, RepositoryError, CommitError, VCSCommunicationError)
log = logging.getLogger(__name__)
# The pycurl library directly accesses C API functions and is not patched by
# gevent. This will potentially lead to deadlocks due to incompatibility to
# gevent. Therefore we check if gevent is active and import a gevent compatible
# wrapper in that case.
try:
from gevent import monkey
if monkey.is_module_patched('__builtin__'):
import geventcurl as pycurl
log.debug('Using gevent comapatible pycurl: %s', pycurl)
else:
import pycurl
except ImportError:
import pycurl
def get_version():
"""
Returns shorter version (digit parts only) as string.
"""
return '.'.join((str(each) for each in VERSION[:3]))
def connect_http(server_and_port):
from rhodecode.lib.vcs import connection, client_http
from rhodecode.lib.middleware.utils import scm_app
session_factory = client_http.ThreadlocalSessionFactory()
connection.Git = client_http.RepoMaker(
server_and_port, '/git', 'git', session_factory)
connection.Hg = client_http.RepoMaker(
server_and_port, '/hg', 'hg', session_factory)
connection.Svn = client_http.RepoMaker(
server_and_port, '/svn', 'svn', session_factory)
connection.Service = client_http.ServiceConnection(
server_and_port, '/_service', session_factory)
scm_app.HG_REMOTE_WSGI = client_http.VcsHttpProxy(
server_and_port, '/proxy/hg')
scm_app.GIT_REMOTE_WSGI = client_http.VcsHttpProxy(
server_and_port, '/proxy/git')
@atexit.register
def free_connection_resources():
connection.Git = None
connection.Hg = None
connection.Svn = None
connection.Service = None
def connect_vcs(server_and_port, protocol):
"""
Initializes the connection to the vcs server.
:param server_and_port: str, e.g. "localhost:9900"
:param protocol: str or "http"
"""
if protocol == 'http':
connect_http(server_and_port)
else:
raise Exception('Invalid vcs server protocol "{}"'.format(protocol))
# TODO: johbo: This function should be moved into our test suite, there is
# no reason to support starting the vcsserver in Enterprise itself.
def start_vcs_server(server_and_port, protocol, log_level=None):
"""
Starts the vcs server in a subprocess.
"""
log.info('Starting VCSServer as a sub process with %s protocol', protocol)
if protocol == 'http':
return _start_http_vcs_server(server_and_port, log_level)
else:
raise Exception('Invalid vcs server protocol "{}"'.format(protocol))
def _start_http_vcs_server(server_and_port, log_level=None):
# TODO: mikhail: shutdown if an http server already runs
host, port = server_and_port.rsplit(":", 1)
args = [
'pserve', 'rhodecode/tests/vcsserver_http.ini',
'http_port=%s' % (port, ), 'http_host=%s' % (host, )]
proc = subprocess32.Popen(args)
def cleanup_server_process():
proc.kill()
atexit.register(cleanup_server_process)
server = create_vcsserver_proxy(server_and_port, protocol='http')
_wait_until_vcs_server_is_reachable(server)
def _wait_until_vcs_server_is_reachable(server, timeout=40):
begin = time.time()
while (time.time() - begin) < timeout:
try:
server.ping()
return
except (VCSCommunicationError, pycurl.error):
log.debug('VCSServer not started yet, retry to connect.')
time.sleep(0.5)
raise Exception(
'Starting the VCSServer failed or took more than {} '
'seconds.'.format(timeout))
def _try_to_shutdown_running_server(server_and_port, protocol):
server = create_vcsserver_proxy(server_and_port, protocol)
try:
server.shutdown()
except pycurl.error:
return
# TODO: Not sure why this is important, but without it the following start
# of the server fails.
server = create_vcsserver_proxy(server_and_port, protocol)
server.ping()
def create_vcsserver_proxy(server_and_port, protocol):
if protocol == 'http':
return _create_vcsserver_proxy_http(server_and_port)
else:
raise Exception('Invalid vcs server protocol "{}"'.format(protocol))
def _create_vcsserver_proxy_http(server_and_port):
from rhodecode.lib.vcs import client_http
session = _create_http_rpc_session()
url = urlparse.urljoin('http://%s' % server_and_port, '/server')
return client_http.RemoteObject(url, session)
class CurlSession(object):
"""
Modeled so that it provides a subset of the requests interface.
This has been created so that it does only provide a minimal API for our
needs. The parts which it provides are based on the API of the library
`requests` which allows us to easily benchmark against it.
Please have a look at the class :class:`requests.Session` when you extend
it.
"""
def __init__(self):
curl = pycurl.Curl()
# TODO: johbo: I did test with 7.19 of libcurl. This version has
# trouble with 100 - continue being set in the expect header. This
# can lead to massive performance drops, switching it off here.
curl.setopt(curl.HTTPHEADER, ["Expect:"])
curl.setopt(curl.TCP_NODELAY, True)
curl.setopt(curl.PROTOCOLS, curl.PROTO_HTTP)
self._curl = curl
def post(self, url, data, allow_redirects=False):
response_buffer = StringIO()
curl = self._curl
curl.setopt(curl.URL, url)
curl.setopt(curl.POST, True)
curl.setopt(curl.POSTFIELDS, data)
curl.setopt(curl.FOLLOWLOCATION, allow_redirects)
curl.setopt(curl.WRITEDATA, response_buffer)
curl.perform()
status_code = curl.getinfo(pycurl.HTTP_CODE)
return CurlResponse(response_buffer, status_code)
class CurlResponse(object):
"""
The response of a request, modeled after the requests API.
This class provides a subset of the response interface known from the
library `requests`. It is intentionally kept similar, so that we can use
`requests` as a drop in replacement for benchmarking purposes.
"""
def __init__(self, response_buffer, status_code):
self._response_buffer = response_buffer
self._status_code = status_code
@property
def content(self):
return self._response_buffer.getvalue()
@property
def status_code(self):
return self._status_code
def _create_http_rpc_session():
session = CurlSession()
return session