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# Copyright (C) 2010-2023 RhodeCode GmbH
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License, version 3
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# (only), as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# This program is dual-licensed. If you wish to learn more about the
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# RhodeCode Enterprise Edition, including its added features, Support services,
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# and proprietary license terms, please see https://rhodecode.com/licenses/
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import gzip
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import shutil
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import logging
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import tempfile
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import urllib.parse
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from webob.exc import HTTPNotFound
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import rhodecode
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from rhodecode.lib.middleware.utils import get_path_info
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from rhodecode.lib.middleware.appenlight import wrap_in_appenlight_if_enabled
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from rhodecode.lib.middleware.simplegit import SimpleGit, GIT_PROTO_PAT
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from rhodecode.lib.middleware.simplehg import SimpleHg
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from rhodecode.lib.middleware.simplesvn import SimpleSvn
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from rhodecode.lib.str_utils import safe_str
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from rhodecode.model.settings import VcsSettingsModel
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log = logging.getLogger(__name__)
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VCS_TYPE_KEY = '_rc_vcs_type'
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VCS_TYPE_SKIP = '_rc_vcs_skip'
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def is_git(environ):
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"""
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Returns True if requests should be handled by GIT wsgi middleware
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"""
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path_info = get_path_info(environ)
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is_git_path = GIT_PROTO_PAT.match(path_info)
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log.debug(
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'request path: `%s` detected as GIT PROTOCOL %s', path_info,
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is_git_path is not None)
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return is_git_path
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def is_hg(environ):
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"""
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Returns True if requests target is mercurial server - header
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``HTTP_ACCEPT`` of such request would start with ``application/mercurial``.
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"""
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is_hg_path = False
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http_accept = environ.get('HTTP_ACCEPT')
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if http_accept and http_accept.startswith('application/mercurial'):
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query = urllib.parse.parse_qs(environ['QUERY_STRING'])
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if 'cmd' in query:
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is_hg_path = True
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path_info = get_path_info(environ)
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log.debug(
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'request path: `%s` detected as HG PROTOCOL %s', path_info,
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is_hg_path)
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return is_hg_path
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def is_svn(environ):
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"""
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Returns True if requests target is Subversion server
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"""
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http_dav = environ.get('HTTP_DAV', '')
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magic_path_segment = rhodecode.CONFIG.get(
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'rhodecode_subversion_magic_path', '/!svn')
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path_info = get_path_info(environ)
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req_method = environ['REQUEST_METHOD']
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is_svn_path = (
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'subversion' in http_dav or
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magic_path_segment in path_info
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or req_method in ['PROPFIND', 'PROPPATCH', 'HEAD']
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)
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log.debug(
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'request path: `%s` detected as SVN PROTOCOL %s', path_info,
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is_svn_path)
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return is_svn_path
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class GunzipMiddleware(object):
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"""
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WSGI middleware that unzips gzip-encoded requests before
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passing on to the underlying application.
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"""
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def __init__(self, application):
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self.app = application
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def __call__(self, environ, start_response):
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accepts_encoding_header = safe_str(environ.get('HTTP_CONTENT_ENCODING', ''))
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if 'gzip' in accepts_encoding_header:
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log.debug('gzip detected, now running gunzip wrapper')
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wsgi_input = environ['wsgi.input']
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if not hasattr(environ['wsgi.input'], 'seek'):
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# The gzip implementation in the standard library of Python 2.x
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# requires the '.seek()' and '.tell()' methods to be available
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# on the input stream. Read the data into a temporary file to
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# work around this limitation.
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wsgi_input = tempfile.SpooledTemporaryFile(64 * 1024 * 1024)
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shutil.copyfileobj(environ['wsgi.input'], wsgi_input)
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wsgi_input.seek(0)
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environ['wsgi.input'] = gzip.GzipFile(fileobj=wsgi_input, mode='r')
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# since we "Ungzipped" the content we say now it's no longer gzip
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# content encoding
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del environ['HTTP_CONTENT_ENCODING']
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# content length has changes ? or i'm not sure
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if 'CONTENT_LENGTH' in environ:
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del environ['CONTENT_LENGTH']
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else:
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log.debug('content not gzipped, gzipMiddleware passing '
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'request further')
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return self.app(environ, start_response)
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def is_vcs_call(environ):
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if VCS_TYPE_KEY in environ:
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raw_type = environ[VCS_TYPE_KEY]
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return raw_type and raw_type != VCS_TYPE_SKIP
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return False
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def detect_vcs_request(environ, backends):
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checks = {
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'hg': (is_hg, SimpleHg),
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'git': (is_git, SimpleGit),
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'svn': (is_svn, SimpleSvn),
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}
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handler = None
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# List of path views first chunk we don't do any checks
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white_list = [
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# favicon often requested by browsers
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'favicon.ico',
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# e.g /_file_store/download
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'_file_store++',
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# login
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"_admin/login",
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# _admin/api is safe too
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'_admin/api',
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# _admin/gist is safe too
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'_admin/gists++',
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# _admin/my_account is safe too
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'_admin/my_account++',
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# static files no detection
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'_static++',
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# debug-toolbar
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'_debug_toolbar++',
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# skip ops ping, status
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'_admin/ops/ping',
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'_admin/ops/status',
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# full channelstream connect should be VCS skipped
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'_admin/channelstream/connect',
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'++/repo_creating_check'
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]
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path_info = get_path_info(environ)
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path_url = path_info.lstrip('/')
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req_method = environ.get('REQUEST_METHOD')
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for item in white_list:
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if item.endswith('++') and path_url.startswith(item[:-2]):
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log.debug('path `%s` in whitelist (match:%s), skipping...', path_url, item)
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return handler
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if item.startswith('++') and path_url.endswith(item[2:]):
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log.debug('path `%s` in whitelist (match:%s), skipping...', path_url, item)
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return handler
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if item == path_url:
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log.debug('path `%s` in whitelist (match:%s), skipping...', path_url, item)
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return handler
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if VCS_TYPE_KEY in environ:
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raw_type = environ[VCS_TYPE_KEY]
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if raw_type == VCS_TYPE_SKIP:
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log.debug('got `skip` marker for vcs detection, skipping...')
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return handler
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_check, handler = checks.get(raw_type) or [None, None]
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if handler:
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log.debug('got handler:%s from environ', handler)
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if not handler:
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log.debug('request start: checking if request for `%s:%s` is of VCS type in order: %s',
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req_method, path_url, backends)
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for vcs_type in backends:
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vcs_check, _handler = checks[vcs_type]
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if vcs_check(environ):
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log.debug('vcs handler found %s', _handler)
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handler = _handler
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break
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return handler
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class VCSMiddleware(object):
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def __init__(self, app, registry, config, appenlight_client):
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self.application = app
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self.registry = registry
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self.config = config
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self.appenlight_client = appenlight_client
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self.use_gzip = True
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# order in which we check the middlewares, based on vcs.backends config
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self.check_middlewares = config['vcs.backends']
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def vcs_config(self, repo_name=None):
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"""
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returns serialized VcsSettings
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"""
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try:
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return VcsSettingsModel(
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repo=repo_name).get_ui_settings_as_config_obj()
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except Exception:
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pass
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def wrap_in_gzip_if_enabled(self, app, config):
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if self.use_gzip:
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app = GunzipMiddleware(app)
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return app
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def _get_handler_app(self, environ):
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app = None
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log.debug('VCSMiddleware: detecting vcs type.')
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handler = detect_vcs_request(environ, self.check_middlewares)
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if handler:
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app = handler(self.config, self.registry)
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return app
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def __call__(self, environ, start_response):
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# check if we handle one of interesting protocols, optionally extract
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# specific vcsSettings and allow changes of how things are wrapped
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vcs_handler = self._get_handler_app(environ)
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if vcs_handler:
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# translate the _REPO_ID into real repo NAME for usage
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# in middleware
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path_info = get_path_info(environ)
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environ['PATH_INFO'] = vcs_handler._get_by_id(path_info)
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# Set acl, url and vcs repo names.
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vcs_handler.set_repo_names(environ)
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# register repo config back to the handler
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vcs_conf = self.vcs_config(vcs_handler.acl_repo_name)
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# maybe damaged/non existent settings. We still want to
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# pass that point to validate on is_valid_and_existing_repo
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# and return proper HTTP Code back to client
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if vcs_conf:
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vcs_handler.repo_vcs_config = vcs_conf
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# check for type, presence in database and on filesystem
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if not vcs_handler.is_valid_and_existing_repo(
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vcs_handler.acl_repo_name,
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vcs_handler.base_path,
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vcs_handler.SCM):
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return HTTPNotFound()(environ, start_response)
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environ['REPO_NAME'] = vcs_handler.url_repo_name
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# Wrap handler in middlewares if they are enabled.
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vcs_handler = self.wrap_in_gzip_if_enabled(
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vcs_handler, self.config)
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vcs_handler, _ = wrap_in_appenlight_if_enabled(
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vcs_handler, self.config, self.appenlight_client)
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return vcs_handler(environ, start_response)
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return self.application(environ, start_response)
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