RedHatTraining/pyramid.git

fix p.security.ACLPermitsResult to subclass p.security.PermitsResult

Michael Merickel

2017-06-15 21300198ee62eb00b757a77f2792329ff2d882a0

commit \| author \| age
c151ad	1	from zope.deprecation import deprecated
MM	2
0c1c39	3	from zope.interface import (
CM	4	Attribute,
	5	Interface,
	6	)
eca67a	7
bc37a5	8	from pyramid.compat import PY2
475532	9
4aa22c	10	# public API interfaces
CM	11
8f45be	12	class IContextFound(Interface):
fd5ae9	13	""" An event type that is emitted after :app:`Pyramid` finds a
8f45be	14	:term:`context` object but before it calls any view code. See the
c81aad	15	documentation attached to :class:`pyramid.events.ContextFound`
8f45be	16	for more information.
CM	17
012b97	18	.. note::
M	19
	20	For backwards compatibility with versions of
fd5ae9	21	:app:`Pyramid` before 1.0, this event interface can also be
c81aad	22	imported as :class:`pyramid.interfaces.IAfterTraversal`.
8f45be	23	"""
4aa22c	24	request = Attribute('The request object')
8f45be	25
CM	26	IAfterTraversal = IContextFound
4aa22c	27
d4f5a8	28	class IBeforeTraversal(Interface):
499b78	29	"""
4112d6	30	An event type that is emitted after :app:`Pyramid` attempted to find a
BJR	31	route but before it calls any traversal or view code. See the documentation
499b78	32	attached to :class:`pyramid.events.Routefound` for more information.
DS	33	"""
	34	request = Attribute('The request object')
	35
4aa22c	36	class INewRequest(Interface):
fd5ae9	37	""" An event type that is emitted whenever :app:`Pyramid`
8f45be	38	begins to process a new request. See the documentation attached
c81aad	39	to :class:`pyramid.events.NewRequest` for more information."""
4aa22c	40	request = Attribute('The request object')
012b97	41
4aa22c	42	class INewResponse(Interface):
fd5ae9	43	""" An event type that is emitted whenever any :app:`Pyramid`
8f45be	44	view returns a response. See the
c81aad	45	documentation attached to :class:`pyramid.events.NewResponse`
8f45be	46	for more information."""
eb7ea4	47	request = Attribute('The request object')
4aa22c	48	response = Attribute('The response object')
CM	49
8f45be	50	class IApplicationCreated(Interface):
c6895b	51	""" Event issued when the
aff443	52	:meth:`pyramid.config.Configurator.make_wsgi_app` method
8f45be	53	is called. See the documentation attached to
c81aad	54	:class:`pyramid.events.ApplicationCreated` for more
8f45be	55	information.
CM	56
012b97	57	.. note::
M	58
	59	For backwards compatibility with :app:`Pyramid`
c81aad	60	versions before 1.0, this interface can also be imported as
CM	61	:class:`pyramid.interfaces.IWSGIApplicationCreatedEvent`.
8f45be	62	"""
e6c2d2	63	app = Attribute("Created application")
239a93	64
CM	65	IWSGIApplicationCreatedEvent = IApplicationCreated # b /c
4aa22c	66
99edc5	67	class IResponse(Interface):
55241c	68	""" Represents a WSGI response using the WebOb response interface.
TL	69	Some attribute and method documentation of this interface references
	70	:rfc:`2616`.
51fb07	71
CM	72	This interface is most famously implemented by
	73	:class:`pyramid.response.Response` and the HTTP exception classes in
	74	:mod:`pyramid.httpexceptions`."""
	75
	76	RequestClass = Attribute(
	77	""" Alias for :class:`pyramid.request.Request` """)
99edc5	78
CM	79	def __call__(environ, start_response):
51fb07	80	""" :term:`WSGI` call interface, should call the start_response
CM	81	callback and should return an iterable"""
	82
	83	accept_ranges = Attribute(
	84	"""Gets and sets and deletes the Accept-Ranges header. For more
	85	information on Accept-Ranges see RFC 2616, section 14.5""")
	86
	87	age = Attribute(
	88	"""Gets and sets and deletes the Age header. Converts using int.
	89	For more information on Age see RFC 2616, section 14.6.""")
	90
	91	allow = Attribute(
	92	"""Gets and sets and deletes the Allow header. Converts using
	93	list. For more information on Allow see RFC 2616, Section 14.7.""")
	94
	95	app_iter = Attribute(
	96	"""Returns the app_iter of the response.
	97
	98	If body was set, this will create an app_iter from that body
	99	(a single-item list)""")
	100
	101	def app_iter_range(start, stop):
	102	""" Return a new app_iter built from the response app_iter that
	103	serves up only the given start:stop range. """
	104
	105	body = Attribute(
	106	"""The body of the response, as a str. This will read in the entire
	107	app_iter if necessary.""")
	108
	109	body_file = Attribute(
	110	"""A file-like object that can be used to write to the body. If you
	111	passed in a list app_iter, that app_iter will be modified by writes.""")
	112
	113	cache_control = Attribute(
	114	"""Get/set/modify the Cache-Control header (RFC 2616 section 14.9)""")
	115
	116	cache_expires = Attribute(
	117	""" Get/set the Cache-Control and Expires headers. This sets the
	118	response to expire in the number of seconds passed when set. """)
	119
	120	charset = Attribute(
	121	"""Get/set the charset (in the Content-Type)""")
	122
	123	def conditional_response_app(environ, start_response):
	124	""" Like the normal __call__ interface, but checks conditional
	125	headers:
	126
	127	- If-Modified-Since (304 Not Modified; only on GET, HEAD)
	128
	129	- If-None-Match (304 Not Modified; only on GET, HEAD)
	130
	131	- Range (406 Partial Content; only on GET, HEAD)"""
	132
	133	content_disposition = Attribute(
	134	"""Gets and sets and deletes the Content-Disposition header.
	135	For more information on Content-Disposition see RFC 2616 section
	136	19.5.1.""")
	137
	138	content_encoding = Attribute(
	139	"""Gets and sets and deletes the Content-Encoding header. For more
	140	information about Content-Encoding see RFC 2616 section 14.11.""")
	141
	142	content_language = Attribute(
	143	"""Gets and sets and deletes the Content-Language header. Converts
	144	using list. For more information about Content-Language see RFC 2616
	145	section 14.12.""")
	146
	147	content_length = Attribute(
	148	"""Gets and sets and deletes the Content-Length header. For more
	149	information on Content-Length see RFC 2616 section 14.17.
	150	Converts using int. """)
	151
	152	content_location = Attribute(
	153	"""Gets and sets and deletes the Content-Location header. For more
	154	information on Content-Location see RFC 2616 section 14.14.""")
	155
	156	content_md5 = Attribute(
	157	"""Gets and sets and deletes the Content-MD5 header. For more
	158	information on Content-MD5 see RFC 2616 section 14.14.""")
	159
25c64c	160	content_range = Attribute(
51fb07	161	"""Gets and sets and deletes the Content-Range header. For more
CM	162	information on Content-Range see section 14.16. Converts using
	163	ContentRange object.""")
	164
	165	content_type = Attribute(
	166	"""Get/set the Content-Type header (or None), without the charset
	167	or any parameters. If you include parameters (or ; at all) when
	168	setting the content_type, any existing parameters will be deleted;
	169	otherwise they will be preserved.""")
	170
	171	content_type_params = Attribute(
012b97	172	"""A dictionary of all the parameters in the content type. This is
51fb07	173	not a view, set to change, modifications of the dict would not
CM	174	be applied otherwise.""")
	175
	176	def copy():
	177	""" Makes a copy of the response and returns the copy. """
	178
	179	date = Attribute(
	180	"""Gets and sets and deletes the Date header. For more information on
	181	Date see RFC 2616 section 14.18. Converts using HTTP date.""")
	182
	183	def delete_cookie(key, path='/', domain=None):
	184	""" Delete a cookie from the client. Note that path and domain must
	185	match how the cookie was originally set. This sets the cookie to the
	186	empty string, and max_age=0 so that it should expire immediately. """
	187
	188	def encode_content(encoding='gzip', lazy=False):
	189	""" Encode the content with the given encoding (only gzip and
	190	identity are supported)."""
	191
	192	environ = Attribute(
	193	"""Get/set the request environ associated with this response,
	194	if any.""")
	195
	196	etag = Attribute(
	197	""" Gets and sets and deletes the ETag header. For more information
	198	on ETag see RFC 2616 section 14.19. Converts using Entity tag.""")
	199
	200	expires = Attribute(
	201	""" Gets and sets and deletes the Expires header. For more
	202	information on Expires see RFC 2616 section 14.21. Converts using
	203	HTTP date.""")
	204
	205	headerlist = Attribute(
	206	""" The list of response headers. """)
	207
	208	headers = Attribute(
	209	""" The headers in a dictionary-like object """)
	210
	211	last_modified = Attribute(
	212	""" Gets and sets and deletes the Last-Modified header. For more
	213	information on Last-Modified see RFC 2616 section 14.29. Converts
	214	using HTTP date.""")
	215
	216	location = Attribute(
	217	""" Gets and sets and deletes the Location header. For more
	218	information on Location see RFC 2616 section 14.30.""")
	219
	220	def md5_etag(body=None, set_content_md5=False):
	221	""" Generate an etag for the response object using an MD5 hash of the
	222	body (the body parameter, or self.body if not given). Sets self.etag.
	223	If set_content_md5 is True sets self.content_md5 as well """
	224
	225	def merge_cookies(resp):
	226	""" Merge the cookies that were set on this response with the given
	227	resp object (which can be any WSGI application). If the resp is a
	228	webob.Response object, then the other object will be modified
	229	in-place. """
	230
	231	pragma = Attribute(
	232	""" Gets and sets and deletes the Pragma header. For more information
	233	on Pragma see RFC 2616 section 14.32. """)
	234
	235	request = Attribute(
	236	""" Return the request associated with this response if any. """)
	237
	238	retry_after = Attribute(
	239	""" Gets and sets and deletes the Retry-After header. For more
	240	information on Retry-After see RFC 2616 section 14.37. Converts
	241	using HTTP date or delta seconds.""")
	242
	243	server = Attribute(
	244	""" Gets and sets and deletes the Server header. For more information
	245	on Server see RFC216 section 14.38. """)
	246
	247	def set_cookie(key, value='', max_age=None, path='/', domain=None,
	248	secure=False, httponly=False, comment=None, expires=None,
	249	overwrite=False):
	250	""" Set (add) a cookie for the response """
	251
	252	status = Attribute(
	253	""" The status string. """)
	254
	255	status_int = Attribute(
	256	""" The status as an integer """)
	257
	258	unicode_body = Attribute(
	259	""" Get/set the unicode value of the body (using the charset of
	260	the Content-Type)""")
	261
	262	def unset_cookie(key, strict=True):
	263	""" Unset a cookie with the given name (remove it from the
	264	response)."""
	265
	266	vary = Attribute(
	267	"""Gets and sets and deletes the Vary header. For more information
	268	on Vary see section 14.44. Converts using list.""")
	269
	270	www_authenticate = Attribute(
	271	""" Gets and sets and deletes the WWW-Authenticate header. For more
	272	information on WWW-Authenticate see RFC 2616 section 14.47. Converts
	273	using 'parse_auth' and 'serialize_auth'. """)
d96ff9	274
CM	275	class IException(Interface): # not an API
	276	""" An interface representing a generic exception """
	277
	278	class IExceptionResponse(IException, IResponse):
a7e625	279	""" An interface representing a WSGI response which is also an exception
CM	280	object. Register an exception view using this interface as a ``context``
	281	to apply the registered view for all exception types raised by
	282	:app:`Pyramid` internally (any exception that inherits from
	283	:class:`pyramid.response.Response`, including
99edc5	284	:class:`pyramid.httpexceptions.HTTPNotFound` and
CM	285	:class:`pyramid.httpexceptions.HTTPForbidden`)."""
85093d	286	def prepare(environ):
CM	287	""" Prepares the response for being called as a WSGI application """
d96ff9	288
5c52da	289	class IDict(Interface):
CM	290	# Documentation-only interface
	291
	292	def __contains__(k):
	293	""" Return ``True`` if key ``k`` exists in the dictionary."""
	294
	295	def __setitem__(k, value):
	296	""" Set a key/value pair into the dictionary"""
012b97	297
5c52da	298	def __delitem__(k):
CM	299	""" Delete an item from the dictionary which is passed to the
	300	renderer as the renderer globals dictionary."""
012b97	301
5c52da	302	def __getitem__(k):
CM	303	""" Return the value for key ``k`` from the dictionary or raise a
	304	KeyError if the key doesn't exist"""
	305
	306	def __iter__():
	307	""" Return an iterator over the keys of this dictionary """
012b97	308
5c52da	309	def get(k, default=None):
CM	310	""" Return the value for key ``k`` from the renderer dictionary, or
	311	the default if no such value exists."""
	312
	313	def items():
	314	""" Return a list of [(k,v)] pairs from the dictionary """
	315
	316	def keys():
	317	""" Return a list of keys from the dictionary """
	318
	319	def values():
	320	""" Return a list of values from the dictionary """
	321
bc37a5	322	if PY2:
475532	323
CM	324	def iterkeys():
	325	""" Return an iterator of keys from the dictionary """
	326
	327	def iteritems():
	328	""" Return an iterator of (k,v) pairs from the dictionary """
	329
	330	def itervalues():
	331	""" Return an iterator of values from the dictionary """
	332
	333	has_key = __contains__
5c52da	334
CM	335	def pop(k, default=None):
	336	""" Pop the key k from the dictionary and return its value. If k
	337	doesn't exist, and default is provided, return the default. If k
	338	doesn't exist and default is not provided, raise a KeyError."""
	339
	340	def popitem():
	341	""" Pop the item with key k from the dictionary and return it as a
	342	two-tuple (k, v). If k doesn't exist, raise a KeyError."""
	343
	344	def setdefault(k, default=None):
	345	""" Return the existing value for key ``k`` in the dictionary. If no
	346	value with ``k`` exists in the dictionary, set the ``default``
	347	value into the dictionary under the k name passed. If a value already
	348	existed in the dictionary, return it. If a value did not exist in
	349	the dictionary, return the default"""
012b97	350
5c52da	351	def update(d):
CM	352	""" Update the renderer dictionary with another dictionary ``d``."""
	353
	354	def clear():
	355	""" Clear all values from the dictionary """
	356
	357	class IBeforeRender(IDict):
a76e99	358	"""
7709b1	359	Subscribers to this event may introspect and modify the set of
a76e99	360	:term:`renderer globals` before they are passed to a :term:`renderer`.
5c52da	361	The event object itself provides a dictionary-like interface for adding
CM	362	and removing :term:`renderer globals`. The keys and values of the
	363	dictionary are those globals. For example::
012b97	364
a76e99	365	from repoze.events import subscriber
CM	366	from pyramid.interfaces import IBeforeRender
	367
	368	@subscriber(IBeforeRender)
	369	def add_global(event):
	370	event['mykey'] = 'foo'
	371
2033ee	372	.. seealso::
SP	373
	374	See also :ref:`beforerender_event`.
a76e99	375	"""
9a66aa	376	rendering_val = Attribute('The value returned by a view or passed to a '
CM	377	'``render`` method for this rendering. '
57144e	378	'This feature is new in Pyramid 1.2.')
9a66aa	379
b04ae5	380	class IRendererInfo(Interface):
MM	381	""" An object implementing this interface is passed to every
	382	:term:`renderer factory` constructor as its only argument (conventionally
	383	named ``info``)"""
	384	name = Attribute('The value passed by the user as the renderer name')
	385	package = Attribute('The "current package" when the renderer '
	386	'configuration statement was found')
	387	type = Attribute('The renderer type name')
	388	registry = Attribute('The "current" application registry when the '
	389	'renderer was created')
	390	settings = Attribute('The deployment settings dictionary related '
	391	'to the current application')
	392
ec4691	393	def clone():
MM	394	""" Return a shallow copy that does not share any mutable state."""
	395
b04ae5	396	class IRendererFactory(Interface):
MM	397	def __call__(info):
	398	""" Return an object that implements
	399	:class:`pyramid.interfaces.IRenderer`. ``info`` is an
	400	object that implements :class:`pyramid.interfaces.IRendererInfo`.
	401	"""
	402
e26903	403	class IRenderer(Interface):
CM	404	def __call__(value, system):
b04ae5	405	""" Call the renderer with the result of the
e26903	406	view (``value``) passed in and return a result (a string or
CM	407	unicode object useful as a response body). Values computed by
	408	the system are passed by the system in the ``system``
	409	parameter, which is a dictionary. Keys in the dictionary
	410	include: ``view`` (the view callable that returned the value),
	411	``renderer_name`` (the template name or simple name of the
	412	renderer), ``context`` (the context object passed to the
	413	view), and ``request`` (the request object passed to the
	414	view)."""
	415
	416	class ITemplateRenderer(IRenderer):
	417	def implementation():
	418	""" Return the object that the underlying templating system
	419	uses to render the template; it is typically a callable that
	420	accepts arbitrary keyword arguments and returns a string or
	421	unicode object """
b04ae5	422
MM	423	deprecated(
	424	'ITemplateRenderer',
	425	'As of Pyramid 1.5 the, "pyramid.interfaces.ITemplateRenderer" interface '
	426	'is scheduled to be removed. It was used by the Mako and Chameleon '
c151ad	427	'renderers which have been split into their own packages.'
b04ae5	428	)
e26903	429
8739f5	430	class IViewMapper(Interface):
CM	431	def __call__(self, object):
	432	""" Provided with an arbitrary object (a function, class, or
	433	instance), returns a callable with the call signature ``(context,
	434	request)``. The callable returned should itself return a Response
	435	object. An IViewMapper is returned by
	436	:class:`pyramid.interfaces.IViewMapperFactory`."""
	437
	438	class IViewMapperFactory(Interface):
	439	def __call__(self, **kw):
	440	"""
	441	Return an object which implements
	442	:class:`pyramid.interfaces.IViewMapper`. ``kw`` will be a dictionary
	443	containing view-specific arguments, such as ``permission``,
	444	``predicates``, ``attr``, ``renderer``, and other items. An
	445	IViewMapperFactory is used by
	446	:meth:`pyramid.config.Configurator.add_view` to provide a plugpoint
	447	to extension developers who want to modify potential view callable
	448	invocation signatures and response values.
	449	"""
	450
a9fb52	451	class IAuthenticationPolicy(Interface):
c81aad	452	""" An object representing a Pyramid authentication policy. """
fe83c6	453
4aa22c	454	def authenticated_userid(request):
fe83c6	455	""" Return the authenticated :term:`userid` or ``None`` if
MM	456	no authenticated userid can be found. This method of the
	457	policy should ensure that a record exists in whatever
	458	persistent store is used related to the user (the user
	459	should not have been deleted); if a record associated with
	460	the current id does not exist in a persistent store, it
	461	should return ``None``.
	462
	463	"""
2526d8	464
CM	465	def unauthenticated_userid(request):
fe83c6	466	""" Return the unauthenticated userid. This method
MM	467	performs the same duty as ``authenticated_userid`` but is
	468	permitted to return the userid based only on data present
	469	in the request; it needn't (and shouldn't) check any
	470	persistent store to ensure that the user record related to
	471	the request userid exists.
	472
	473	This method is intended primarily a helper to assist the
	474	``authenticated_userid`` method in pulling credentials out
	475	of the request data, abstracting away the specific headers,
	476	query strings, etc that are used to authenticate the request.
	477
	478	"""
4aa22c	479
CM	480	def effective_principals(request):
	481	""" Return a sequence representing the effective principals
fe83c6	482	typically including the :term:`userid` and any groups belonged
MM	483	to by the current user, always including 'system' groups such
	484	as ``pyramid.security.Everyone`` and
	485	``pyramid.security.Authenticated``.
	486
	487	"""
4aa22c	488
c7afe4	489	def remember(request, userid, **kw):
4aa22c	490	""" Return a set of headers suitable for 'remembering' the
fe83c6	491	:term:`userid` named ``userid`` when set in a response. An
MM	492	individual authentication policy and its consumers can
c62f7d	493	decide on the composition and meaning of ``**kw``.
fe83c6	494
MM	495	"""
012b97	496
4aa22c	497	def forget(request):
CM	498	""" Return a set of headers suitable for 'forgetting' the
fe83c6	499	current user on subsequent requests.
MM	500
	501	"""
4aa22c	502
CM	503	class IAuthorizationPolicy(Interface):
c81aad	504	""" An object representing a Pyramid authorization policy. """
4aa22c	505	def permits(context, principals, permission):
213001	506	""" Return an instance of :class:`pyramid.security.Allowed` if any
MM	507	of the ``principals`` is allowed the ``permission`` in the current
	508	``context``, else return an instance of
	509	:class:`pyramid.security.Denied`.
57cc86	510	"""
012b97	511
4aa22c	512	def principals_allowed_by_permission(context, permission):
57cc86	513	""" Return a set of principal identifiers allowed by the
CM	514	``permission`` in ``context``. This behavior is optional; if you
	515	choose to not implement it you should define this method as
	516	something which raises a ``NotImplementedError``. This method
	517	will only be called when the
	518	``pyramid.security.principals_allowed_by_permission`` API is
	519	used."""
4aa22c	520
5c52da	521	class IMultiDict(IDict): # docs-only interface
2a1c3f	522	"""
CM	523	An ordered dictionary that can have multiple values for each key. A
b9a6b3	524	multidict adds the methods ``getall``, ``getone``, ``mixed``, ``extend``,
2a1c3f	525	``add``, and ``dict_of_lists`` to the normal dictionary interface. A
CM	526	multidict data structure is used as ``request.POST``, ``request.GET``,
	527	and ``request.params`` within an :app:`Pyramid` application.
	528	"""
	529
	530	def add(key, value):
	531	""" Add the key and value, not overwriting any previous value. """
	532
	533	def dict_of_lists():
	534	"""
	535	Returns a dictionary where each key is associated with a list of
	536	values.
	537	"""
	538
	539	def extend(other=None, **kwargs):
	540	""" Add a set of keys and values, not overwriting any previous
	541	values. The ``other`` structure may be a list of two-tuples or a
	542	dictionary. If ``*kwargs`` is passed, its value will* overwrite
	543	existing values."""
	544
	545	def getall(key):
	546	""" Return a list of all values matching the key (may be an empty
	547	list) """
	548
	549	def getone(key):
	550	""" Get one value matching the key, raising a KeyError if multiple
	551	values were found. """
	552
	553	def mixed():
	554	""" Returns a dictionary where the values are either single values,
	555	or a list of values when a key/value appears more than once in this
	556	dictionary. This is similar to the kind of dictionary often used to
	557	represent the variables in a web request. """
d2973d	558
CM	559	# internal interfaces
	560
	561	class IRequest(Interface):
	562	""" Request type interface attached to all request objects """
	563
b4843b	564	class ITweens(Interface):
af2323	565	""" Marker interface for utility registration representing the ordered
b4843b	566	set of a configuration's tween factories"""
af2323	567
CM	568	class IRequestHandler(Interface):
	569	""" """
	570	def __call__(self, request):
0d4963	571	""" Must return a tuple of IReqest, IResponse or raise an exception.
CM	572	The ``request`` argument will be an instance of an object that
	573	provides IRequest."""
af2323	574
012b97	575	IRequest.combined = IRequest # for exception view lookups
d2973d	576
d7f34b	577	class IRequestExtensions(Interface):
MM	578	""" Marker interface for storing request extensions (properties and
	579	methods) which will be added to the request object."""
	580	descriptors = Attribute(
	581	"""A list of descriptors that will be added to each request.""")
	582	methods = Attribute(
	583	"""A list of methods to be added to each request.""")
74d503	584
d2973d	585	class IRouteRequest(Interface):
CM	586	""" internal only interface used as in a utility lookup to find
	587	route-specific interfaces. Not an API."""
	588
b29429	589	class IStaticURLInfo(Interface):
3e2f12	590	""" A policy for generating URLs to static assets """
cda7f6	591	def add(config, name, spec, **extra):
b29429	592	""" Add a new static info registration """
CM	593
	594	def generate(path, request, **kw):
	595	""" Generate a URL for the given path """
a0b40c	596
6e29b4	597	def add_cache_buster(config, spec, cache_buster):
MM	598	""" Add a new cache buster to a particular set of assets """
	599
c8cf22	600	class IResponseFactory(Interface):
da5f5f	601	""" A utility which generates a response """
MM	602	def __call__(request):
	603	""" Return a response object implementing IResponse,
	604	e.g. :class:`pyramid.response.Response`). It should handle the
	605	case when ``request`` is ``None``."""
7de404	606
81a833	607	class IRequestFactory(Interface):
CM	608	""" A utility which generates a request """
	609	def __call__(environ):
04cc91	610	""" Return an instance of ``pyramid.request.Request``"""
81a833	611
CM	612	def blank(path):
	613	""" Return an empty request object (see
8c6a4c	614	:meth:`pyramid.request.Request.blank`)"""
81a833	615
ff1213	616	class IViewClassifier(Interface):
CM	617	""" Internal only marker interface for views."""
	618
	619	class IExceptionViewClassifier(Interface):
	620	""" Internal only marker interface for exception views."""
	621
7de404	622	class IView(Interface):
CM	623	def __call__(context, request):
99edc5	624	""" Must return an object that implements IResponse. """
d66bfb	625
CM	626	class ISecuredView(IView):
573184	627	""" Internal only interface. Not an API. """
d66bfb	628	def __call_permissive__(context, request):
CM	629	""" Guaranteed-permissive version of __call__ """
	630
	631	def __permitted__(context, request):
	632	""" Return True if view execution will be permitted using the
	633	context and request, False otherwise"""
	634
	635	class IMultiView(ISecuredView):
	636	""" internal only. A multiview is a secured view that is a
	637	collection of other views. Each of the views is associated with
	638	zero or more predicates. Not an API."""
ff1213	639	def add(view, predicates, order, accept=None, phash=None):
d66bfb	640	""" Add a view to the multiview. """
5ed24b	641
358dc2	642	class IRootFactory(Interface):
8b1f6e	643	def __call__(request):
CM	644	""" Return a root object based on the request """
dfc2b6	645
CM	646	class IDefaultRootFactory(Interface):
8b1f6e	647	def __call__(request):
dfc2b6	648	""" Return the default root object for an application """
612d74	649
4df575	650	class ITraverser(Interface):
8b1f6e	651	def __call__(request):
80a25e	652	""" Return a dictionary with (at least) the keys ``root``,
CM	653	``context``, ``view_name``, ``subpath``, ``traversed``,
	654	``virtual_root``, and ``virtual_root_path``. These values are
f426e5	655	typically the result of an object graph traversal. ``root`` is the
CM	656	physical root object, ``context`` will be a model object,
	657	``view_name`` will be the view name used (a Unicode name),
	658	``subpath`` will be a sequence of Unicode names that followed the
	659	view name but were not traversed, ``traversed`` will be a sequence of
	660	Unicode names that were traversed (including the virtual root path,
	661	if any) ``virtual_root`` will be a model object representing the
	662	virtual root (or the physical root if traversal was not performed),
	663	and ``virtual_root_path`` will be a sequence representing the virtual
	664	root path (a sequence of Unicode names) or ``None`` if traversal was
	665	not performed.
80a25e	666
f426e5	667	Extra keys for special purpose functionality can be returned as
80a25e	668	necessary.
CM	669
	670	All values returned in the dictionary will be made available
f426e5	671	as attributes of the ``request`` object by the :term:`router`.
80a25e	672	"""
93a4f5	673
517d03	674	ITraverserFactory = ITraverser # b / c for 1.0 code
8f8869	675
2466f6	676	class IViewPermission(Interface):
d7e43b	677	def __call__(context, request):
b04ae5	678	""" Return True if the permission allows, return False if it denies.
MM	679	"""
2466f6	680
eba6f8	681	class IRouter(Interface):
b04ae5	682	""" WSGI application which routes requests to 'view' code based on
eba6f8	683	a view registry."""
9dd823	684	registry = Attribute(
eba6f8	685	"""Component architecture registry local to this application.""")
012b97	686
0bee84	687	def make_request(environ):
MM	688	"""
	689	Create a new request object.
	690
	691	This method initializes a new :class:`pyramid.interfaces.IRequest`
	692	object using the application's
	693	:class:`pyramid.interfaces.IRequestFactory`.
	694	"""
	695
	696	def invoke_request(request):
	697	"""
	698	Invoke the :app:`Pyramid` request pipeline.
	699
	700	See :ref:`router_chapter` for information on the request pipeline.
	701	"""
	702
	703	class IExecutionPolicy(Interface):
	704	def __call__(environ, router):
	705	"""
	706	This callable triggers the router to process a raw WSGI environ dict
	707	into a response and controls the :app:`Pyramid` request pipeline.
	708
	709	The ``environ`` is the raw WSGI environ.
	710
	711	The ``router`` is an :class:`pyramid.interfaces.IRouter` object which
	712	should be used to create a request object and send it into the
	713	processing pipeline.
	714
	715	The return value should be a :class:`pyramid.interfaces.IResponse`
	716	object or an exception that will be handled by WSGI middleware.
	717
2e015c	718	The default execution policy simply creates a request and sends it
0bee84	719	through the pipeline:
MM	720
	721	.. code-block:: python
	722
	723	def simple_execution_policy(environ, router):
	724	request = router.make_request(environ)
	725	return router.invoke_request(request)
	726	"""
	727
	728	class ISettings(IDict):
c81aad	729	""" Runtime settings utility for pyramid; represents the
8b1f6e	730	deployment settings for the application. Implements a mapping
CM	731	interface."""
012b97	732
c81aad	733	# this interface, even if it becomes unused within Pyramid, is
cba2e1	734	# imported by other packages (such as traversalwrapper)
cbdc36	735	class ILocation(Interface):
CM	736	"""Objects that have a structural location"""
	737	__parent__ = Attribute("The parent in the location hierarchy")
	738	__name__ = Attribute("The name within the parent")
	739
bd39b1	740	class IDebugLogger(Interface):
47b4d3	741	""" Interface representing a PEP 282 logger """
62267e	742
bd39b1	743	ILogger = IDebugLogger # b/c
CM	744
70f1cd	745	class IRoutePregenerator(Interface):
CM	746	def __call__(request, elements, kw):
fb90f0	747
CM	748	""" A pregenerator is a function associated by a developer with a
	749	:term:`route`. The pregenerator for a route is called by
	750	:meth:`pyramid.request.Request.route_url` in order to adjust the set
	751	of arguments passed to it by the user for special purposes, such as
	752	Pylons 'subdomain' support. It will influence the URL returned by
	753	``route_url``.
70f1cd	754
CM	755	A pregenerator should return a two-tuple of ``(elements, kw)``
	756	after examining the originals passed to this function, which
	757	are the arguments ``(request, elements, kw)``. The simplest
	758	pregenerator is::
	759
	760	def pregenerator(request, elements, kw):
	761	return elements, kw
	762
	763	You can employ a pregenerator by passing a ``pregenerator``
	764	argument to the
aff443	765	:meth:`pyramid.config.Configurator.add_route`
70f1cd	766	function.
CM	767
	768	"""
	769
74409d	770	class IRoute(Interface):
CM	771	""" Interface representing the type of object returned from
	772	``IRoutesMapper.get_route``"""
	773	name = Attribute('The route name')
	774	pattern = Attribute('The route pattern')
	775	factory = Attribute(
fd5ae9	776	'The :term:`root factory` used by the :app:`Pyramid` router '
74409d	777	'when this route matches (or ``None``)')
CM	778	predicates = Attribute(
	779	'A sequence of :term:`route predicate` objects used to '
c337a8	780	'determine if a request matches this route or not after '
74409d	781	'basic pattern matching has been completed.')
70f1cd	782	pregenerator = Attribute('This attribute should either be ``None`` or '
CM	783	'a callable object implementing the '
	784	'``IRoutePregenerator`` interface')
0445bf	785
74409d	786	def match(path):
CM	787	"""
	788	If the ``path`` passed to this function can be matched by the
	789	``pattern`` of this route, return a dictionary (the
	790	'matchdict'), which will contain keys representing the dynamic
	791	segment markers in the pattern mapped to values extracted from
	792	the provided ``path``.
	793
	794	If the ``path`` passed to this function cannot be matched by
	795	the ``pattern`` of this route, return ``None``.
	796	"""
	797	def generate(kw):
	798	"""
	799	Generate a URL based on filling in the dynamic segment markers
	800	in the pattern using the ``kw`` dictionary provided.
	801	"""
	802
62267e	803	class IRoutesMapper(Interface):
CM	804	""" Interface representing a Routes ``Mapper`` object """
8b1f6e	805	def get_routes():
e725cf	806	""" Return a sequence of Route objects registered in the mapper.
CM	807	Static routes will not be returned in this sequence."""
8b1f6e	808
74409d	809	def has_routes():
CM	810	""" Returns ``True`` if any route has been registered. """
	811
	812	def get_route(name):
	813	""" Returns an ``IRoute`` object if a route with the name ``name``
	814	was registered, otherwise return ``None``."""
	815
90ed75	816	def connect(name, pattern, factory=None, predicates=(), pregenerator=None,
CM	817	static=True):
8b1f6e	818	""" Add a new route. """
CM	819
	820	def generate(name, kw):
	821	""" Generate a URL using the route named ``name`` with the
	822	keywords implied by kw"""
	823
	824	def __call__(request):
74409d	825	""" Return a dictionary containing matching information for
CM	826	the request; the ``route`` key of this dictionary will either
	827	be a Route object or ``None`` if no route matched; the
51b2f9	828	``match`` key will be the matchdict or ``None`` if no route
90ed75	829	matched. Static routes will not be considered for matching. """
8b1f6e	830
c51896	831	class IResourceURL(Interface):
db0185	832	virtual_path = Attribute(
CM	833	'The virtual url path of the resource as a string.'
	834	)
	835	physical_path = Attribute(
	836	'The physical url path of the resource as a string.'
	837	)
	838	virtual_path_tuple = Attribute(
	839	'The virtual url path of the resource as a tuple. (New in 1.5)'
	840	)
e744e9	841	physical_path_tuple = Attribute(
db0185	842	'The physical url path of the resource as a tuple. (New in 1.5)'
CM	843	)
c51896	844
bea48e	845	class IPEP302Loader(Interface):
TS	846	""" See http://www.python.org/dev/peps/pep-0302/#id30.
	847	"""
	848	def get_data(path):
	849	""" Retrieve data for and arbitrary "files" from storage backend.
	850
	851	Raise IOError for not found.
	852
	853	Data is returned as bytes.
	854	"""
	855
	856	def is_package(fullname):
	857	""" Return True if the module specified by 'fullname' is a package.
	858	"""
	859
	860	def get_code(fullname):
	861	""" Return the code object for the module identified by 'fullname'.
0445bf	862
bea48e	863	Return 'None' if it's a built-in or extension module.
0445bf	864
bea48e	865	If the loader doesn't have the code object but it does have the source
TS	866	code, return the compiled source code.
	867
	868	Raise ImportError if the module can't be found by the importer at all.
	869	"""
	870
	871	def get_source(fullname):
	872	""" Return the source code for the module identified by 'fullname'.
0445bf	873
bea48e	874	Return a string, using newline characters for line endings, or None
TS	875	if the source is not available.
0445bf	876
bea48e	877	Raise ImportError if the module can't be found by the importer at all.
TS	878	"""
	879
	880	def get_filename(fullname):
	881	""" Return the value of '__file__' if the named module was loaded.
0445bf	882
bea48e	883	If the module is not found, raise ImportError.
TS	884	"""
	885
	886
	887	class IPackageOverrides(IPEP302Loader):
2869fc	888	""" Utility for pkg_resources overrides """
CM	889
a7a6d7	890	# VH_ROOT_KEY is an interface; its imported from other packages (e.g.
CM	891	# traversalwrapper)
ff1213	892	VH_ROOT_KEY = 'HTTP_X_VHM_ROOT'
7534ba	893
CM	894	class ILocalizer(Interface):
	895	""" Localizer for a specific language """
012b97	896
7534ba	897	class ILocaleNegotiator(Interface):
CM	898	def __call__(request):
	899	""" Return a locale name """
	900
	901	class ITranslationDirectories(Interface):
	902	""" A list object representing all known translation directories
	903	for an application"""
d96ff9	904
e25a70	905	class IDefaultPermission(Interface):
CM	906	""" A string object representing the default permission to be used
	907	for all view configurations which do not explicitly declare their
	908	own."""
968209	909
de3d0c	910	class IDefaultCSRFOptions(Interface):
MM	911	""" An object representing the default CSRF settings to be used for
	912	all view configurations which do not explicitly declare their own."""
	913	require_csrf = Attribute(
	914	'Boolean attribute. If ``True``, then CSRF checks will be enabled by '
	915	'default for the view unless overridden.')
	916	token = Attribute('The key to be matched in the body of the request.')
	917	header = Attribute('The header to be matched with the CSRF token.')
	918	safe_methods = Attribute('A set of safe methods that skip CSRF checks.')
17fa5e	919	callback = Attribute('A callback to disable CSRF checks per-request.')
de3d0c	920
968209	921	class ISessionFactory(Interface):
CM	922	""" An interface representing a factory which accepts a request object and
	923	returns an ISession object """
	924	def __call__(request):
	925	""" Return an ISession object """
	926
866949	927	class ISession(IDict):
968209	928	""" An interface representing a session (a web session object,
CM	929	usually accessed via ``request.session``.
	930
	931	Keys and values of a session must be pickleable.
682a9b	932
MM	933	.. versionchanged:: 1.9
	934
	935	Sessions are no longer required to implement ``get_csrf_token`` and
	936	``new_csrf_token``. CSRF token support was moved to the pluggable
	937	:class:`pyramid.interfaces.ICSRFStoragePolicy` configuration hook.
	938
968209	939	"""
CM	940
	941	# attributes
	942
	943	created = Attribute('Integer representing Epoch time when created.')
	944	new = Attribute('Boolean attribute. If ``True``, the session is new.')
	945
	946	# special methods
	947
	948	def invalidate():
	949	""" Invalidate the session. The action caused by
	950	``invalidate`` is implementation-dependent, but it should have
	951	the effect of completely dissociating any data stored in the
	952	session with the current request. It might set response
dd4f73	953	values (such as one which clears a cookie), or it might not.
MM	954
	955	An invalidated session may be used after the call to ``invalidate``
	956	with the effect that a new session is created to store the data. This
	957	enables workflows requiring an entirely new session, such as in the
	958	case of changing privilege levels or preventing fixation attacks.
	959	"""
968209	960
CM	961	def changed():
	962	""" Mark the session as changed. A user of a session should
	963	call this method after he or she mutates a mutable object that
	964	is a value of the session (it should not be required after
	965	mutating the session itself). For example, if the user has
	966	stored a dictionary in the session under the key ``foo``, and
	967	he or she does ``session['foo'] = {}``, ``changed()`` needn't
	968	be called. However, if subsequently he or she does
	969	``session['foo']['a'] = 1``, ``changed()`` must be called for
	970	the sessioning machinery to notice the mutation of the
	971	internal dictionary."""
	972
6f6d36	973	def flash(msg, queue='', allow_duplicate=True):
CM	974	""" Push a flash message onto the end of the flash queue represented
	975	by ``queue``. An alternate flash message queue can used by passing
	976	an optional ``queue``, which must be a string. If
	977	``allow_duplicate`` is false, if the ``msg`` already exists in the
bfb395	978	queue, it will not be re-added."""
4df636	979
6f6d36	980	def pop_flash(queue=''):
CM	981	""" Pop a queue from the flash storage. The queue is removed from
	982	flash storage after this message is called. The queue is returned;
	983	it is a list of flash messages added by
be03f7	984	:meth:`pyramid.interfaces.ISession.flash`"""
6f6d36	985
CM	986	def peek_flash(queue=''):
	987	""" Peek at a queue in the flash storage. The queue remains in
	988	flash storage after this message is called. The queue is returned;
	989	it is a list of flash messages added by
be03f7	990	:meth:`pyramid.interfaces.ISession.flash`
319793	991	"""
CM	992
	993
fe0d22	994	class ICSRFStoragePolicy(Interface):
a2c7c7	995	""" An object that offers the ability to verify CSRF tokens and generate
682a9b	996	new ones."""
a2c7c7	997
MW	998	def new_csrf_token(request):
682a9b	999	""" Create and return a new, random cross-site request forgery
MM	1000	protection token. The token will be an ascii-compatible unicode
	1001	string.
	1002
	1003	"""
a2c7c7	1004
MW	1005	def get_csrf_token(request):
	1006	""" Return a cross-site request forgery protection token. It
682a9b	1007	will be an ascii-compatible unicode string. If a token was previously
MM	1008	set for this user via ``new_csrf_token``, that token will be returned.
	1009	If no CSRF token was previously set, ``new_csrf_token`` will be
	1010	called, which will create and set a token, and this token will be
	1011	returned.
eb2fee	1012
a2c7c7	1013	"""
MW	1014
3f14d6	1015	def check_csrf_token(request, token):
MM	1016	""" Determine if the supplied ``token`` is valid. Most implementations
	1017	should simply compare the ``token`` to the current value of
	1018	``get_csrf_token`` but it is possible to verify the token using
	1019	any mechanism necessary using this method.
	1020
	1021	Returns ``True`` if the ``token`` is valid, otherwise ``False``.
	1022
	1023	"""
	1024
a2c7c7	1025
3b5ccb	1026	class IIntrospector(Interface):
CM	1027	def get(category_name, discriminator, default=None):
	1028	""" Get the IIntrospectable related to the category_name and the
	1029	discriminator (or discriminator hash) ``discriminator``. If it does
8a32e3	1030	not exist in the introspector, return the value of ``default`` """
3b5ccb	1031
79f34b	1032	def get_category(category_name, default=None, sort_key=None):
412b4a	1033	""" Get a sequence of dictionaries in the form
CM	1034	``[{'introspectable':IIntrospectable, 'related':[sequence of related
	1035	IIntrospectables]}, ...]`` where each introspectable is part of the
79f34b	1036	category associated with ``category_name`` .
CM	1037
	1038	If the category named ``category_name`` does not exist in the
	1039	introspector the value passed as ``default`` will be returned.
	1040
	1041	If ``sort_key`` is ``None``, the sequence will be returned in the
	1042	order the introspectables were added to the introspector. Otherwise,
	1043	sort_key should be a function that accepts an IIntrospectable and
	1044	returns a value from it (ala the ``key`` function of Python's
	1045	``sorted`` callable)."""
412b4a	1046
5e92f3	1047	def categories():
CM	1048	""" Return a sorted sequence of category names known by
	1049	this introspector """
	1050
57a0d7	1051	def categorized(sort_key=None):
412b4a	1052	""" Get a sequence of tuples in the form ``[(category_name,
CM	1053	[{'introspectable':IIntrospectable, 'related':[sequence of related
	1054	IIntrospectables]}, ...])]`` representing all known
57a0d7	1055	introspectables. If ``sort_key`` is ``None``, each introspectables
412b4a	1056	sequence will be returned in the order the introspectables were added
57a0d7	1057	to the introspector. Otherwise, sort_key should be a function that
3b5ccb	1058	accepts an IIntrospectable and returns a value from it (ala the
CM	1059	``key`` function of Python's ``sorted`` callable)."""
	1060
	1061	def remove(category_name, discriminator):
	1062	""" Remove the IIntrospectable related to ``category_name`` and
5e92f3	1063	``discriminator`` from the introspector, and fix up any relations
CM	1064	that the introspectable participates in. This method will not raise
	1065	an error if an introspectable related to the category name and
	1066	discriminator does not exist."""
	1067
57a9d6	1068	def related(intr):
5e92f3	1069	""" Return a sequence of IIntrospectables related to the
57a9d6	1070	IIntrospectable ``intr``. Return the empty sequence if no relations
CM	1071	for exist."""
5e92f3	1072
CM	1073	def add(intr):
	1074	""" Add the IIntrospectable ``intr`` (use instead of
	1075	:meth:`pyramid.interfaces.IIntrospector.add` when you have a custom
	1076	IIntrospectable). Replaces any existing introspectable registered
	1077	using the same category/discriminator.
	1078
	1079	This method is not typically called directly, instead it's called
	1080	indirectly by :meth:`pyramid.interfaces.IIntrospector.register`"""
3b5ccb	1081
CM	1082	def relate(*pairs):
043ccd	1083	""" Given any number of ``(category_name, discriminator)`` pairs
3b5ccb	1084	passed as positional arguments, relate the associated introspectables
CM	1085	to each other. The introspectable related to each pair must have
	1086	already been added via ``.add`` or ``.add_intr``; a :exc:`KeyError`
	1087	will result if this is not true. An error will not be raised if any
5e92f3	1088	pair has already been associated with another.
CM	1089
	1090	This method is not typically called directly, instead it's called
	1091	indirectly by :meth:`pyramid.interfaces.IIntrospector.register`
	1092	"""
3b5ccb	1093
CM	1094	def unrelate(*pairs):
043ccd	1095	""" Given any number of ``(category_name, discriminator)`` pairs
3b5ccb	1096	passed as positional arguments, unrelate the associated introspectables
CM	1097	from each other. The introspectable related to each pair must have
	1098	already been added via ``.add`` or ``.add_intr``; a :exc:`KeyError`
	1099	will result if this is not true. An error will not be raised if any
5e92f3	1100	pair is not already related to another.
3b5ccb	1101
5e92f3	1102	This method is not typically called directly, instead it's called
CM	1103	indirectly by :meth:`pyramid.interfaces.IIntrospector.register`
	1104	"""
3b5ccb	1105
CM	1106
	1107	class IIntrospectable(Interface):
	1108	""" An introspectable object used for configuration introspection. In
	1109	addition to the methods below, objects which implement this interface
	1110	must also implement all the methods of Python's
57a0d7	1111	``collections.MutableMapping`` (the "dictionary interface"), and must be
CM	1112	hashable."""
3b5ccb	1113
5e92f3	1114	title = Attribute('Text title describing this introspectable')
CM	1115	type_name = Attribute('Text type name describing this introspectable')
	1116	order = Attribute('integer order in which registered with introspector '
522405	1117	'(managed by introspector, usually)')
3b5ccb	1118	category_name = Attribute('introspection category name')
CM	1119	discriminator = Attribute('introspectable discriminator (within category) '
	1120	'(must be hashable)')
	1121	discriminator_hash = Attribute('an integer hash of the discriminator')
522405	1122	action_info = Attribute('An IActionInfo object representing the caller '
CM	1123	'that invoked the creation of this introspectable '
	1124	'(usually a sentinel until updated during '
	1125	'self.register)')
3b5ccb	1126
CM	1127	def relate(category_name, discriminator):
5e92f3	1128	""" Indicate an intent to relate this IIntrospectable with another
CM	1129	IIntrospectable (the one associated with the ``category_name`` and
	1130	``discriminator``) during action execution.
3b5ccb	1131	"""
CM	1132
8f6b24	1133	def unrelate(category_name, discriminator):
5e92f3	1134	""" Indicate an intent to break the relationship between this
CM	1135	IIntrospectable with another IIntrospectable (the one associated with
	1136	the ``category_name`` and ``discriminator``) during action execution.
	1137	"""
3b5ccb	1138
57a9d6	1139	def register(introspector, action_info):
35ad08	1140	""" Register this IIntrospectable with an introspector. This method
CM	1141	is invoked during action execution. Adds the introspectable and its
57a9d6	1142	relations to the introspector. ``introspector`` should be an object
CM	1143	implementing IIntrospector. ``action_info`` should be a object
	1144	implementing the interface :class:`pyramid.interfaces.IActionInfo`
	1145	representing the call that registered this introspectable.
	1146	Pseudocode for an implementation of this method:
35ad08	1147
CM	1148	.. code-block:: python
	1149
	1150	def register(self, introspector, action_info):
	1151	self.action_info = action_info
	1152	introspector.add(self)
	1153	for methodname, category_name, discriminator in self._relations:
	1154	method = getattr(introspector, methodname)
	1155	method((i.category_name, i.discriminator),
	1156	(category_name, discriminator))
	1157	"""
	1158
57a0d7	1159	def __hash__():
CM	1160
	1161	""" Introspectables must be hashable. The typical implementation of
	1162	an introsepectable's __hash__ is::
	1163
	1164	return hash((self.category_name,) + (self.discriminator,))
	1165	"""
	1166
57a9d6	1167	class IActionInfo(Interface):
549cf7	1168	""" Class which provides code introspection capability associated with an
CM	1169	action. The ParserInfo class used by ZCML implements the same interface."""
	1170	file = Attribute(
d2ed7e	1171	'Filename of action-invoking code as a string')
549cf7	1172	line = Attribute(
d2ed7e	1173	'Starting line number in file (as an integer) of action-invoking code.'
CM	1174	'This will be ``None`` if the value could not be determined.')
549cf7	1175
CM	1176	def __str__():
	1177	""" Return a representation of the action information (including
	1178	source code from file, if possible) """
57a9d6	1179
56df90	1180	class IAssetDescriptor(Interface):
CM	1181	"""
	1182	Describes an :term:`asset`.
	1183	"""
	1184
	1185	def absspec():
	1186	"""
	1187	Returns the absolute asset specification for this asset
	1188	(e.g. ``mypackage:templates/foo.pt``).
	1189	"""
	1190
	1191	def abspath():
	1192	"""
	1193	Returns an absolute path in the filesystem to the asset.
	1194	"""
	1195
	1196	def stream():
	1197	"""
	1198	Returns an input stream for reading asset contents. Raises an
	1199	exception if the asset is a directory or does not exist.
	1200	"""
	1201
	1202	def isdir():
	1203	"""
	1204	Returns True if the asset is a directory, otherwise returns False.
	1205	"""
	1206
	1207	def listdir():
	1208	"""
	1209	Returns iterable of filenames of directory contents. Raises an
	1210	exception if asset is not a directory.
	1211	"""
	1212
	1213	def exists():
	1214	"""
	1215	Returns True if asset exists, otherwise returns False.
	1216	"""
	1217
677216	1218	class IJSONAdapter(Interface):
MM	1219	"""
	1220	Marker interface for objects that can convert an arbitrary object
	1221	into a JSON-serializable primitive.
	1222	"""
	1223
a00621	1224	class IPredicateList(Interface):
CM	1225	""" Interface representing a predicate list """
	1226
e4b931	1227	class IViewDeriver(Interface):
0b0f7e	1228	options = Attribute('A list of supported options to be passed to '
e4b931	1229	':meth:`pyramid.config.Configurator.add_view`. '
MM	1230	'This attribute is optional.')
	1231
	1232	def __call__(view, info):
	1233	"""
	1234	Derive a new view from the supplied view.
	1235
	1236	View options, package information and registry are available on
	1237	``info``, an instance of :class:`pyramid.interfaces.IViewDeriverInfo`.
	1238
	1239	The ``view`` is a callable accepting ``(context, request)``.
	1240
	1241	"""
007600	1242
MM	1243	class IViewDeriverInfo(Interface):
	1244	""" An object implementing this interface is passed to every
	1245	:term:`view deriver` during configuration."""
2160ce	1246	registry = Attribute('The "current" application registry where the '
007600	1247	'view was created')
2160ce	1248	package = Attribute('The "current package" where the view '
007600	1249	'configuration statement was found')
MM	1250	settings = Attribute('The deployment settings dictionary related '
	1251	'to the current application')
	1252	options = Attribute('The view options passed to the view, including any '
	1253	'default values that were not overriden')
	1254	predicates = Attribute('The list of predicates active on the view')
a610d0	1255	original_view = Attribute('The original view object being wrapped')
e8c66a	1256	exception_only = Attribute('The view will only be invoked for exceptions')
007600	1257
e4b931	1258	class IViewDerivers(Interface):
MM	1259	""" Interface for view derivers list """
	1260
2a1ca8	1261	class ICacheBuster(Interface):
CR	1262	"""
6e29b4	1263	A cache buster modifies the URL generation machinery for
MM	1264	:meth:`~pyramid.request.Request.static_url`. See :ref:`cache_busting`.
6b88bd	1265
CM	1266	.. versionadded:: 1.6
2a1ca8	1267	"""
4d19b8	1268	def __call__(request, subpath, kw):
0445bf	1269	"""
40c6bf	1270	Modifies a subpath and/or keyword arguments from which a static asset
4d19b8	1271	URL will be computed during URL generation.
0445bf	1272
6e29b4	1273	The ``subpath`` argument is a path of ``/``-delimited segments that
MM	1274	represent the portion of the asset URL which is used to find the asset.
	1275	The ``kw`` argument is a dict of keywords that are to be passed
	1276	eventually to :meth:`~pyramid.request.Request.static_url` for URL
	1277	generation. The return value should be a two-tuple of
b2fc4a	1278	``(subpath, kw)`` where ``subpath`` is the relative URL from where the
MM	1279	file is served and ``kw`` is the same input argument. The return value
	1280	should be modified to include the cache bust token in the generated
	1281	URL.
9d521e	1282
4d19b8	1283	The ``kw`` dictionary contains extra arguments passed to
MM	1284	:meth:`~pyramid.request.Request.static_url` as well as some extra
	1285	items that may be usful including:
2a1ca8	1286
4d19b8	1287	- ``pathspec`` is the path specification for the resource
MM	1288	to be cache busted.
	1289
	1290	- ``rawspec`` is the original location of the file, ignoring
	1291	any calls to :meth:`pyramid.config.Configurator.override_asset`.
	1292
	1293	The ``pathspec`` and ``rawspec`` values are only different in cases
	1294	where an asset has been mounted into a virtual location using
	1295	:meth:`pyramid.config.Configurator.override_asset`. For example, with
	1296	a call to ``request.static_url('myapp:static/foo.png'), the
	1297	``pathspec`` is ``myapp:static/foo.png`` whereas the ``rawspec`` may
	1298	be ``themepkg:bar.png``, assuming a call to
b2fc4a	1299	``config.override_asset('myapp:static/foo.png', 'themepkg:bar.png')``.
0445bf	1300	"""
CR	1301
eb2fee	1302	# configuration phases: a lower phase number means the actions associated
CM	1303	# with this phase will be executed earlier than those with later phase
3171fb	1304	# numbers. The default phase number is 0, FTR.
eb2fee	1305
568a02	1306	PHASE0_CONFIG = -30
eb2fee	1307	PHASE1_CONFIG = -20
CM	1308	PHASE2_CONFIG = -10
568a02	1309	PHASE3_CONFIG = 0