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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 re
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import os
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import logging
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import urllib.request
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import urllib.parse
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import urllib.error
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import urllib.parse
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import requests
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from pyramid.httpexceptions import HTTPNotAcceptable
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from rhodecode import ConfigGet
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from rhodecode.lib.middleware import simplevcs
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from rhodecode.lib.middleware.utils import get_path_info
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from rhodecode.lib.utils import is_valid_repo
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from rhodecode.lib.str_utils import safe_str
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log = logging.getLogger(__name__)
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class SimpleSvnApp(object):
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IGNORED_HEADERS = [
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'connection', 'keep-alive', 'content-encoding',
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'transfer-encoding', 'content-length']
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rc_extras = {}
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def __init__(self, config):
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self.config = config
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self.session = requests.Session()
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def __call__(self, environ, start_response):
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request_headers = self._get_request_headers(environ)
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data_io = environ['wsgi.input']
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req_method: str = environ['REQUEST_METHOD']
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has_content_length: bool = 'CONTENT_LENGTH' in environ
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path_info = self._get_url(
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self.config.get('subversion_http_server_url', ''), get_path_info(environ))
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transfer_encoding = environ.get('HTTP_TRANSFER_ENCODING', '')
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log.debug('Handling: %s method via `%s` has_content_length:%s', req_method, path_info, has_content_length)
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# stream control flag, based on request and content type...
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stream = False
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if req_method in ['MKCOL'] or has_content_length:
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# NOTE(johbo): Avoid that we end up with sending the request in chunked
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# transfer encoding (mainly on Gunicorn). If we know the content
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# length, then we should transfer the payload in one request.
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data_io = data_io.read()
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if req_method in ['GET', 'PUT'] or transfer_encoding == 'chunked':
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# NOTE(marcink): when getting/uploading files, we want to STREAM content
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# back to the client/proxy instead of buffering it here...
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stream = True
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stream = stream
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log.debug('Calling SVN PROXY at `%s`, using method:%s. Stream: %s',
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path_info, req_method, stream)
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call_kwargs = dict(
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data=data_io,
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headers=request_headers,
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stream=stream
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)
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if req_method in ['HEAD', 'DELETE']:
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# NOTE(marcink): HEAD might be deprecated for SVN 1.14+ protocol
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del call_kwargs['data']
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try:
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response = self.session.request(
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req_method, path_info, **call_kwargs)
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except requests.ConnectionError:
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log.exception('ConnectionError occurred for endpoint %s', path_info)
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raise
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if response.status_code not in [200, 401]:
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text = '\n{}'.format(safe_str(response.text)) if response.text else ''
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if response.status_code >= 500:
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log.error('Got SVN response:%s with text:`%s`', response, text)
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else:
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log.debug('Got SVN response:%s with text:`%s`', response, text)
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else:
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log.debug('got response code: %s', response.status_code)
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response_headers = self._get_response_headers(response.headers)
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start_response(f'{response.status_code} {response.reason}', response_headers)
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return response.iter_content(chunk_size=1024)
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def _get_url(self, svn_http_server, path):
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svn_http_server_url = (svn_http_server or '').rstrip('/')
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url_path = urllib.parse.urljoin(svn_http_server_url + '/', (path or '').lstrip('/'))
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url_path = urllib.parse.quote(url_path, safe="/:=~+!$,;'")
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return url_path
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def _get_txn_id(self, environ):
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url = environ['RAW_URI']
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# Define the regex pattern
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pattern = r'/txr/([^/]+)/'
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# Search for the pattern in the URL
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match = re.search(pattern, url)
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# Check if a match is found and extract the captured group
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if match:
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txn_id = match.group(1)
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return txn_id
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def _get_request_headers(self, environ):
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headers = {}
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whitelist = {
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'Authorization': {}
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}
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for key in environ:
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if key in whitelist:
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headers[key] = environ[key]
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elif not key.startswith('HTTP_'):
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continue
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else:
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new_key = key.split('_')
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new_key = [k.capitalize() for k in new_key[1:]]
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new_key = '-'.join(new_key)
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headers[new_key] = environ[key]
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if 'CONTENT_TYPE' in environ:
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headers['Content-Type'] = environ['CONTENT_TYPE']
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if 'CONTENT_LENGTH' in environ:
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headers['Content-Length'] = environ['CONTENT_LENGTH']
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return headers
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def _get_response_headers(self, headers):
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headers = [
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(h, headers[h])
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for h in headers
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if h.lower() not in self.IGNORED_HEADERS
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]
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return headers
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class DisabledSimpleSvnApp(object):
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def __init__(self, config):
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self.config = config
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def __call__(self, environ, start_response):
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reason = 'Cannot handle SVN call because: SVN HTTP Proxy is not enabled'
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log.warning(reason)
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return HTTPNotAcceptable(reason)(environ, start_response)
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class SimpleSvn(simplevcs.SimpleVCS):
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"""
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details: https://svn.apache.org/repos/asf/subversion/trunk/notes/http-and-webdav/webdav-protocol
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Read Commands : (OPTIONS, PROPFIND, GET, REPORT)
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GET: fetch info about resources
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PROPFIND: Used to retrieve properties of resources.
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REPORT: Used for specialized queries to the repository. E.g History etc...
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OPTIONS: request is sent to an SVN server, the server responds with information about the available HTTP
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methods and other server capabilities.
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Write Commands : (MKACTIVITY, PROPPATCH, PUT, CHECKOUT, MKCOL, MOVE,
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-------------- COPY, DELETE, LOCK, UNLOCK, MERGE)
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With the exception of LOCK/UNLOCK, every write command performs some
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sort of DeltaV commit operation. In DeltaV, a commit always starts
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by creating a transaction (MKACTIVITY), applies a log message
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(PROPPATCH), does some other write methods, and then ends by
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committing the transaction (MERGE). If the MERGE fails, the client
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may try to remove the transaction with a DELETE.
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PROPPATCH: Used to set and/or remove properties on resources.
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MKCOL: Creates a new collection (directory).
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DELETE: Removes a resource.
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COPY and MOVE: Used for copying and moving resources.
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MERGE: Used to merge changes from different branches.
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CHECKOUT, CHECKIN, UNCHECKOUT: DeltaV methods for managing working resources and versions.
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"""
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SCM = 'svn'
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READ_ONLY_COMMANDS = ('OPTIONS', 'PROPFIND', 'GET', 'REPORT')
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WRITE_COMMANDS = ('MERGE', 'POST', 'PUT', 'COPY', 'MOVE', 'DELETE', 'MKCOL')
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DEFAULT_HTTP_SERVER = 'http://svn:8090'
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def _get_repository_name(self, environ):
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"""
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Gets repository name out of PATH_INFO header
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:param environ: environ where PATH_INFO is stored
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"""
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path = get_path_info(environ).split('!')
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repo_name = path[0].strip('/')
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# SVN includes the whole path in it's requests, including
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# subdirectories inside the repo. Therefore we have to search for
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# the repo root directory.
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if not is_valid_repo(
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repo_name, self.base_path, explicit_scm=self.SCM):
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current_path = ''
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for component in repo_name.split('/'):
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current_path += component
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if is_valid_repo(
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current_path, self.base_path, explicit_scm=self.SCM):
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return current_path
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current_path += '/'
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return repo_name
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def _get_action(self, environ):
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return (
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'pull'
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if environ['REQUEST_METHOD'] in self.READ_ONLY_COMMANDS
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else 'push')
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def _should_use_callback_daemon(self, extras, environ, action):
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# only PUT & MERGE command triggers hooks, so we don't want to start
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# hooks server too many times. POST however starts the svn transaction
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# so we also need to run the init of callback daemon of POST
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if environ['REQUEST_METHOD'] not in self.READ_ONLY_COMMANDS:
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return True
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return False
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def _create_wsgi_app(self, repo_path, repo_name, config):
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if self._is_svn_enabled():
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return SimpleSvnApp(config)
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# we don't have http proxy enabled return dummy request handler
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return DisabledSimpleSvnApp(config)
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def _is_svn_enabled(self):
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return ConfigGet().get_bool('vcs.svn.proxy.enabled')
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def _create_config(self, extras, repo_name, scheme='http'):
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server_url = ConfigGet().get_str('vcs.svn.proxy.host')
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server_url = server_url or self.DEFAULT_HTTP_SERVER
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extras['subversion_http_server_url'] = server_url
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return extras
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