async def traverse(
request: IRequest, parent: IBaseObject,
path: Tuple[str, ...]) -> Tuple[IBaseObject, Tuple[str, ...]]:
"""Do not use outside the main router function."""
if IApplication.providedBy(parent):
request.application = parent
if len(path) == 0:
return parent, path
assert request is not None # could be used for permissions, etc
if not ITraversable.providedBy(parent):
# not a traversable context
return parent, path
try:
if path[0][0] == "_" or path[0] in (".", ".."):
raise HTTPUnauthorized()
if path[0][0] == "@":
# shortcut
return parent, path
if IAsyncContainer.providedBy(parent):
context = await parent.async_get(path[0], suppress_events=True)
if context is None:
return parent, path
else:
context = parent[path[0]]
except (TypeError, KeyError, AttributeError):
return parent, path
if IDatabase.providedBy(context):
task_vars.db.set(context)
# Add a transaction Manager to request
tm = context.get_transaction_manager()
task_vars.tm.set(tm)
# Start a transaction
txn = await tm.begin(
read_only=not app_settings["check_writable_request"](request))
# Get the root of the tree
context = await tm.get_root(txn=txn)
if IContainer.providedBy(context):
task_vars.container.set(context)
# make sure to unset before we attempt to load in case
# there is an existing registry object set on task_vars
task_vars.registry.set(None)
registry = await get_registry(context)
layers = registry.get(ACTIVE_LAYERS_KEY, [])
for layer in layers:
try:
alsoProvides(request, import_class(layer))
except ModuleNotFoundError:
logger.error("Can not apply layer " + layer, request=request)
return await traverse(request, context, path[1:])
async def traverse(request, parent, path):
"""Do not use outside the main router function."""
if IApplication.providedBy(parent):
request.application = parent
if not path:
return parent, path
assert request is not None # could be used for permissions, etc
if not ITraversable.providedBy(parent):
# not a traversable context
return parent, path
try:
if path[0][0] == '_' or path[0] in ('.', '..'):
raise HTTPUnauthorized()
if path[0][0] == '@':
# shortcut
return parent, path
if IAsyncContainer.providedBy(parent):
context = await parent.async_get(path[0], suppress_events=True)
if context is None:
return parent, path
else:
context = parent[path[0]]
except (TypeError, KeyError, AttributeError):
return parent, path
if IDatabase.providedBy(context):
request._db_write_enabled = app_settings['check_writable_request'](
request)
request._db_id = context.id
# Add a transaction Manager to request
tm = request._tm = context.get_transaction_manager()
# Start a transaction
txn = await tm.begin(request=request)
# Get the root of the tree
context = await tm.get_root(txn=txn)
if IContainer.providedBy(context):
request._container_id = context.id
request.container = context
annotations_container = IAnnotations(request.container)
request.container_settings = await annotations_container.async_get(
REGISTRY_DATA_KEY)
layers = request.container_settings.get(ACTIVE_LAYERS_KEY, [])
for layer in layers:
try:
alsoProvides(request, import_class(layer))
except ModuleNotFoundError:
logger.error('Can not apply layer ' + layer, request=request)
return await traverse(request, context, path[1:])
async def traverse(request, parent, path):
"""Do not use outside the main router function."""
if IApplication.providedBy(parent):
request.application = parent
if not path:
return parent, path
assert request is not None # could be used for permissions, etc
if not ITraversable.providedBy(parent):
# not a traversable context
return parent, path
try:
if path[0][0] == '_' or path[0] in ('.', '..'):
raise HTTPUnauthorized()
if path[0][0] == '@':
# shortcut
return parent, path
if IAsyncContainer.providedBy(parent):
context = await parent.async_get(path[0], suppress_events=True)
if context is None:
return parent, path
else:
context = parent[path[0]]
except (TypeError, KeyError, AttributeError):
return parent, path
if IDatabase.providedBy(context):
request._db_write_enabled = app_settings['check_writable_request'](request)
request._db_id = context.id
# Add a transaction Manager to request
tm = request._tm = context.get_transaction_manager()
# Start a transaction
txn = await tm.begin(request=request)
# Get the root of the tree
context = await tm.get_root(txn=txn)
if IContainer.providedBy(context):
request._container_id = context.id
request.container = context
annotations_container = IAnnotations(request.container)
request.container_settings = await annotations_container.async_get(REGISTRY_DATA_KEY)
layers = request.container_settings.get(ACTIVE_LAYERS_KEY, [])
for layer in layers:
try:
alsoProvides(request, import_class(layer))
except ModuleNotFoundError:
logger.error('Can not apply layer ' + layer, request=request)
return await traverse(request, context, path[1:])
async def traverse(request, parent, path):
"""Do not use outside the main router function."""
if IApplication.providedBy(parent):
request.application = parent
if not path:
return parent, path
assert request is not None # could be used for permissions, etc
if not ITraversable.providedBy(parent):
# not a traversable context
return parent, path
try:
if path[0].startswith('_'):
raise HTTPUnauthorized()
if IAsyncContainer.providedBy(parent):
context = await parent.async_get(path[0])
else:
context = parent[path[0]]
except (TypeError, KeyError, AttributeError):
return parent, path
if IDatabase.providedBy(context):
request._db_write_enabled = False
request._db_id = context.id
# Create a transaction Manager
request._tm = context.new_transaction_manager()
# Start a transaction
try:
await request._tm.begin(request=request)
except asyncpg.exceptions.UndefinedTableError:
pass
# Get the root of the tree
context = await request._tm.root()
if ISite.providedBy(context):
request._site_id = context.id
request.site = context
annotations_container = IAnnotations(request.site)
request.site_settings = await annotations_container.async_get(
REGISTRY_DATA_KEY)
layers = request.site_settings.get(ACTIVE_LAYERS_KEY, [])
for layer in layers:
alsoProvides(request, import_class(layer))
return await traverse(request, context, path[1:])