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# Copyright 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
from fnmatch import fnmatch
import logging
from urlparse import urlparse
from appengine_url_fetcher import AppEngineUrlFetcher
from appengine_wrappers import IsDevServer
from caching_file_system import CachingFileSystem
from caching_rietveld_patcher import CachingRietveldPatcher
from chained_compiled_file_system import ChainedCompiledFileSystem
from compiled_file_system import CompiledFileSystem
from host_file_system_creator import HostFileSystemCreator
from instance_servlet import InstanceServlet
from render_servlet import RenderServlet
from rietveld_patcher import RietveldPatcher, RietveldPatcherError
from object_store_creator import ObjectStoreCreator
from patched_file_system import PatchedFileSystem
from server_instance import ServerInstance
from servlet import Request, Response, Servlet
import svn_constants
import url_constants
class _PatchServletDelegate(RenderServlet.Delegate):
def __init__(self, issue, delegate):
self._issue = issue
self._delegate = delegate
def CreateServerInstance(self):
object_store_creator = ObjectStoreCreator(start_empty=False)
branch_utility = self._delegate.CreateBranchUtility(object_store_creator)
host_file_system_creator = self._delegate.CreateHostFileSystemCreator(
object_store_creator)
# TODO(fj): Use OfflineFileSystem here once all json/idl files in api/
# are pulled into data store by cron jobs.
base_file_system = CachingFileSystem(host_file_system_creator.Create(),
object_store_creator)
base_compiled_fs_factory = CompiledFileSystem.Factory(base_file_system,
object_store_creator)
rietveld_patcher = CachingRietveldPatcher(
RietveldPatcher(svn_constants.EXTENSIONS_PATH,
self._issue,
AppEngineUrlFetcher(url_constants.CODEREVIEW_SERVER)),
object_store_creator)
patched_file_system = PatchedFileSystem(base_file_system,
rietveld_patcher)
patched_compiled_fs_factory = CompiledFileSystem.Factory(
patched_file_system, object_store_creator)
compiled_fs_factory = ChainedCompiledFileSystem.Factory(
[(patched_compiled_fs_factory, patched_file_system),
(base_compiled_fs_factory, base_file_system)])
return ServerInstance(object_store_creator,
patched_file_system,
self._delegate.CreateAppSamplesFileSystem(
object_store_creator),
'/_patch/%s' % self._issue,
compiled_fs_factory,
branch_utility,
host_file_system_creator)
class PatchServlet(Servlet):
'''Servlet which renders patched docs.
'''
def __init__(self, request, delegate=None):
self._request = request
self._delegate = delegate or InstanceServlet.Delegate()
def Get(self):
if (not IsDevServer() and
not fnmatch(urlparse(self._request.host).netloc, '*.appspot.com')):
# Only allow patches on appspot URLs; it doesn't matter if appspot.com is
# XSS'ed, but it matters for chrome.com.
redirect_host = 'https://chrome-apps-doc.appspot.com'
logging.info('Redirecting from XSS-able host %s to %s' % (
self._request.host, redirect_host))
return Response.Redirect(
'%s/_patch/%s' % (redirect_host, self._request.path))
path_with_issue = self._request.path.lstrip('/')
if '/' in path_with_issue:
issue, path_without_issue = path_with_issue.split('/', 1)
else:
return Response.NotFound('Malformed URL. It should look like ' +
'https://developer.chrome.com/_patch/12345/extensions/...')
try:
response = RenderServlet(
Request(path_without_issue,
self._request.host,
self._request.headers),
_PatchServletDelegate(issue, self._delegate)).Get()
# Disable cache for patched content.
response.headers.pop('cache-control', None)
except RietveldPatcherError as e:
response = Response.NotFound(e.message, {'Content-Type': 'text/plain'})
redirect_url, permanent = response.GetRedirect()
if redirect_url is not None:
response = Response.Redirect('/_patch/%s%s' % (issue, redirect_url),
permanent)
return response
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