from zope.deprecation import deprecated from zope.interface import ( Attribute, Interface, ) from pyramid.compat import PY3 # public API interfaces class IContextFound(Interface): """ An event type that is emitted after :app:`Pyramid` finds a :term:`context` object but before it calls any view code. See the documentation attached to :class:`pyramid.events.ContextFound` for more information. .. note:: For backwards compatibility with versions of :app:`Pyramid` before 1.0, this event interface can also be imported as :class:`pyramid.interfaces.IAfterTraversal`. """ request = Attribute('The request object') IAfterTraversal = IContextFound class INewRequest(Interface): """ An event type that is emitted whenever :app:`Pyramid` begins to process a new request. See the documentation attached to :class:`pyramid.events.NewRequest` for more information.""" request = Attribute('The request object') class INewResponse(Interface): """ An event type that is emitted whenever any :app:`Pyramid` view returns a response. See the documentation attached to :class:`pyramid.events.NewResponse` for more information.""" request = Attribute('The request object') response = Attribute('The response object') class IApplicationCreated(Interface): """ Event issued when the :meth:`pyramid.config.Configurator.make_wsgi_app` method is called. See the documentation attached to :class:`pyramid.events.ApplicationCreated` for more information. .. note:: For backwards compatibility with :app:`Pyramid` versions before 1.0, this interface can also be imported as :class:`pyramid.interfaces.IWSGIApplicationCreatedEvent`. """ app = Attribute("Created application") IWSGIApplicationCreatedEvent = IApplicationCreated # b /c class IResponse(Interface): """ Represents a WSGI response using the WebOb response interface. Some attribute and method documentation of this interface references :rfc:`2616`. This interface is most famously implemented by :class:`pyramid.response.Response` and the HTTP exception classes in :mod:`pyramid.httpexceptions`.""" RequestClass = Attribute( """ Alias for :class:`pyramid.request.Request` """) def __call__(environ, start_response): """ :term:`WSGI` call interface, should call the start_response callback and should return an iterable""" accept_ranges = Attribute( """Gets and sets and deletes the Accept-Ranges header. For more information on Accept-Ranges see RFC 2616, section 14.5""") age = Attribute( """Gets and sets and deletes the Age header. Converts using int. For more information on Age see RFC 2616, section 14.6.""") allow = Attribute( """Gets and sets and deletes the Allow header. Converts using list. For more information on Allow see RFC 2616, Section 14.7.""") app_iter = Attribute( """Returns the app_iter of the response. If body was set, this will create an app_iter from that body (a single-item list)""") def app_iter_range(start, stop): """ Return a new app_iter built from the response app_iter that serves up only the given start:stop range. """ body = Attribute( """The body of the response, as a str. This will read in the entire app_iter if necessary.""") body_file = Attribute( """A file-like object that can be used to write to the body. If you passed in a list app_iter, that app_iter will be modified by writes.""") cache_control = Attribute( """Get/set/modify the Cache-Control header (RFC 2616 section 14.9)""") cache_expires = Attribute( """ Get/set the Cache-Control and Expires headers. This sets the response to expire in the number of seconds passed when set. """) charset = Attribute( """Get/set the charset (in the Content-Type)""") def conditional_response_app(environ, start_response): """ Like the normal __call__ interface, but checks conditional headers: - If-Modified-Since (304 Not Modified; only on GET, HEAD) - If-None-Match (304 Not Modified; only on GET, HEAD) - Range (406 Partial Content; only on GET, HEAD)""" content_disposition = Attribute( """Gets and sets and deletes the Content-Disposition header. For more information on Content-Disposition see RFC 2616 section 19.5.1.""") content_encoding = Attribute( """Gets and sets and deletes the Content-Encoding header. For more information about Content-Encoding see RFC 2616 section 14.11.""") content_language = Attribute( """Gets and sets and deletes the Content-Language header. Converts using list. For more information about Content-Language see RFC 2616 section 14.12.""") content_length = Attribute( """Gets and sets and deletes the Content-Length header. For more information on Content-Length see RFC 2616 section 14.17. Converts using int. """) content_location = Attribute( """Gets and sets and deletes the Content-Location header. For more information on Content-Location see RFC 2616 section 14.14.""") content_md5 = Attribute( """Gets and sets and deletes the Content-MD5 header. For more information on Content-MD5 see RFC 2616 section 14.14.""") content_range = Attribute( """Gets and sets and deletes the Content-Range header. For more information on Content-Range see section 14.16. Converts using ContentRange object.""") content_type = Attribute( """Get/set the Content-Type header (or None), without the charset or any parameters. If you include parameters (or ; at all) when setting the content_type, any existing parameters will be deleted; otherwise they will be preserved.""") content_type_params = Attribute( """A dictionary of all the parameters in the content type. This is not a view, set to change, modifications of the dict would not be applied otherwise.""") def copy(): """ Makes a copy of the response and returns the copy. """ date = Attribute( """Gets and sets and deletes the Date header. For more information on Date see RFC 2616 section 14.18. Converts using HTTP date.""") def delete_cookie(key, path='/', domain=None): """ Delete a cookie from the client. Note that path and domain must match how the cookie was originally set. This sets the cookie to the empty string, and max_age=0 so that it should expire immediately. """ def encode_content(encoding='gzip', lazy=False): """ Encode the content with the given encoding (only gzip and identity are supported).""" environ = Attribute( """Get/set the request environ associated with this response, if any.""") etag = Attribute( """ Gets and sets and deletes the ETag header. For more information on ETag see RFC 2616 section 14.19. Converts using Entity tag.""") expires = Attribute( """ Gets and sets and deletes the Expires header. For more information on Expires see RFC 2616 section 14.21. Converts using HTTP date.""") headerlist = Attribute( """ The list of response headers. """) headers = Attribute( """ The headers in a dictionary-like object """) last_modified = Attribute( """ Gets and sets and deletes the Last-Modified header. For more information on Last-Modified see RFC 2616 section 14.29. Converts using HTTP date.""") location = Attribute( """ Gets and sets and deletes the Location header. For more information on Location see RFC 2616 section 14.30.""") def md5_etag(body=None, set_content_md5=False): """ Generate an etag for the response object using an MD5 hash of the body (the body parameter, or self.body if not given). Sets self.etag. If set_content_md5 is True sets self.content_md5 as well """ def merge_cookies(resp): """ Merge the cookies that were set on this response with the given resp object (which can be any WSGI application). If the resp is a webob.Response object, then the other object will be modified in-place. """ pragma = Attribute( """ Gets and sets and deletes the Pragma header. For more information on Pragma see RFC 2616 section 14.32. """) request = Attribute( """ Return the request associated with this response if any. """) retry_after = Attribute( """ Gets and sets and deletes the Retry-After header. For more information on Retry-After see RFC 2616 section 14.37. Converts using HTTP date or delta seconds.""") server = Attribute( """ Gets and sets and deletes the Server header. For more information on Server see RFC216 section 14.38. """) def set_cookie(key, value='', max_age=None, path='/', domain=None, secure=False, httponly=False, comment=None, expires=None, overwrite=False): """ Set (add) a cookie for the response """ status = Attribute( """ The status string. """) status_int = Attribute( """ The status as an integer """) unicode_body = Attribute( """ Get/set the unicode value of the body (using the charset of the Content-Type)""") def unset_cookie(key, strict=True): """ Unset a cookie with the given name (remove it from the response).""" vary = Attribute( """Gets and sets and deletes the Vary header. For more information on Vary see section 14.44. Converts using list.""") www_authenticate = Attribute( """ Gets and sets and deletes the WWW-Authenticate header. For more information on WWW-Authenticate see RFC 2616 section 14.47. Converts using 'parse_auth' and 'serialize_auth'. """) class IException(Interface): # not an API """ An interface representing a generic exception """ class IExceptionResponse(IException, IResponse): """ An interface representing a WSGI response which is also an exception object. Register an exception view using this interface as a ``context`` to apply the registered view for all exception types raised by :app:`Pyramid` internally (any exception that inherits from :class:`pyramid.response.Response`, including :class:`pyramid.httpexceptions.HTTPNotFound` and :class:`pyramid.httpexceptions.HTTPForbidden`).""" def prepare(environ): """ Prepares the response for being called as a WSGI application """ class IDict(Interface): # Documentation-only interface def __contains__(k): """ Return ``True`` if key ``k`` exists in the dictionary.""" def __setitem__(k, value): """ Set a key/value pair into the dictionary""" def __delitem__(k): """ Delete an item from the dictionary which is passed to the renderer as the renderer globals dictionary.""" def __getitem__(k): """ Return the value for key ``k`` from the dictionary or raise a KeyError if the key doesn't exist""" def __iter__(): """ Return an iterator over the keys of this dictionary """ def get(k, default=None): """ Return the value for key ``k`` from the renderer dictionary, or the default if no such value exists.""" def items(): """ Return a list of [(k,v)] pairs from the dictionary """ def keys(): """ Return a list of keys from the dictionary """ def values(): """ Return a list of values from the dictionary """ if not PY3: def iterkeys(): """ Return an iterator of keys from the dictionary """ def iteritems(): """ Return an iterator of (k,v) pairs from the dictionary """ def itervalues(): """ Return an iterator of values from the dictionary """ has_key = __contains__ def pop(k, default=None): """ Pop the key k from the dictionary and return its value. If k doesn't exist, and default is provided, return the default. If k doesn't exist and default is not provided, raise a KeyError.""" def popitem(): """ Pop the item with key k from the dictionary and return it as a two-tuple (k, v). If k doesn't exist, raise a KeyError.""" def setdefault(k, default=None): """ Return the existing value for key ``k`` in the dictionary. If no value with ``k`` exists in the dictionary, set the ``default`` value into the dictionary under the k name passed. If a value already existed in the dictionary, return it. If a value did not exist in the dictionary, return the default""" def update(d): """ Update the renderer dictionary with another dictionary ``d``.""" def clear(): """ Clear all values from the dictionary """ class IBeforeRender(IDict): """ Subscribers to this event may introspect and modify the set of :term:`renderer globals` before they are passed to a :term:`renderer`. The event object itself provides a dictionary-like interface for adding and removing :term:`renderer globals`. The keys and values of the dictionary are those globals. For example:: from repoze.events import subscriber from pyramid.interfaces import IBeforeRender @subscriber(IBeforeRender) def add_global(event): event['mykey'] = 'foo' .. seealso:: See also :ref:`beforerender_event`. """ rendering_val = Attribute('The value returned by a view or passed to a ' '``render`` method for this rendering. ' 'This feature is new in Pyramid 1.2.') class IRendererInfo(Interface): """ An object implementing this interface is passed to every :term:`renderer factory` constructor as its only argument (conventionally named ``info``)""" name = Attribute('The value passed by the user as the renderer name') package = Attribute('The "current package" when the renderer ' 'configuration statement was found') type = Attribute('The renderer type name') registry = Attribute('The "current" application registry when the ' 'renderer was created') settings = Attribute('The deployment settings dictionary related ' 'to the current application') def clone(): """ Return a shallow copy that does not share any mutable state.""" class IRendererFactory(Interface): def __call__(info): """ Return an object that implements :class:`pyramid.interfaces.IRenderer`. ``info`` is an object that implements :class:`pyramid.interfaces.IRendererInfo`. """ class IRenderer(Interface): def __call__(value, system): """ Call the renderer with the result of the view (``value``) passed in and return a result (a string or unicode object useful as a response body). Values computed by the system are passed by the system in the ``system`` parameter, which is a dictionary. Keys in the dictionary include: ``view`` (the view callable that returned the value), ``renderer_name`` (the template name or simple name of the renderer), ``context`` (the context object passed to the view), and ``request`` (the request object passed to the view).""" class ITemplateRenderer(IRenderer): def implementation(): """ Return the object that the underlying templating system uses to render the template; it is typically a callable that accepts arbitrary keyword arguments and returns a string or unicode object """ deprecated( 'ITemplateRenderer', 'As of Pyramid 1.5 the, "pyramid.interfaces.ITemplateRenderer" interface ' 'is scheduled to be removed. It was used by the Mako and Chameleon ' 'renderers which have been split into their own packages.' ) class IViewMapper(Interface): def __call__(self, object): """ Provided with an arbitrary object (a function, class, or instance), returns a callable with the call signature ``(context, request)``. The callable returned should itself return a Response object. An IViewMapper is returned by :class:`pyramid.interfaces.IViewMapperFactory`.""" class IViewMapperFactory(Interface): def __call__(self, **kw): """ Return an object which implements :class:`pyramid.interfaces.IViewMapper`. ``kw`` will be a dictionary containing view-specific arguments, such as ``permission``, ``predicates``, ``attr``, ``renderer``, and other items. An IViewMapperFactory is used by :meth:`pyramid.config.Configurator.add_view` to provide a plugpoint to extension developers who want to modify potential view callable invocation signatures and response values. """ class IAuthenticationPolicy(Interface): """ An object representing a Pyramid authentication policy. """ def authenticated_userid(request): """ Return the authenticated :term:`userid` or ``None`` if no authenticated userid can be found. This method of the policy should ensure that a record exists in whatever persistent store is used related to the user (the user should not have been deleted); if a record associated with the current id does not exist in a persistent store, it should return ``None``. """ def unauthenticated_userid(request): """ Return the *unauthenticated* userid. This method performs the same duty as ``authenticated_userid`` but is permitted to return the userid based only on data present in the request; it needn't (and shouldn't) check any persistent store to ensure that the user record related to the request userid exists. This method is intended primarily a helper to assist the ``authenticated_userid`` method in pulling credentials out of the request data, abstracting away the specific headers, query strings, etc that are used to authenticate the request. """ def effective_principals(request): """ Return a sequence representing the effective principals typically including the :term:`userid` and any groups belonged to by the current user, always including 'system' groups such as ``pyramid.security.Everyone`` and ``pyramid.security.Authenticated``. """ def remember(request, userid, **kw): """ Return a set of headers suitable for 'remembering' the :term:`userid` named ``userid`` when set in a response. An individual authentication policy and its consumers can decide on the composition and meaning of ``**kw``. """ def forget(request): """ Return a set of headers suitable for 'forgetting' the current user on subsequent requests. """ class IAuthorizationPolicy(Interface): """ An object representing a Pyramid authorization policy. """ def permits(context, principals, permission): """ Return ``True`` if any of the ``principals`` is allowed the ``permission`` in the current ``context``, else return ``False`` """ def principals_allowed_by_permission(context, permission): """ Return a set of principal identifiers allowed by the ``permission`` in ``context``. This behavior is optional; if you choose to not implement it you should define this method as something which raises a ``NotImplementedError``. This method will only be called when the ``pyramid.security.principals_allowed_by_permission`` API is used.""" class IMultiDict(IDict): # docs-only interface """ An ordered dictionary that can have multiple values for each key. A multidict adds the methods ``getall``, ``getone``, ``mixed``, ``extend``, ``add``, and ``dict_of_lists`` to the normal dictionary interface. A multidict data structure is used as ``request.POST``, ``request.GET``, and ``request.params`` within an :app:`Pyramid` application. """ def add(key, value): """ Add the key and value, not overwriting any previous value. """ def dict_of_lists(): """ Returns a dictionary where each key is associated with a list of values. """ def extend(other=None, **kwargs): """ Add a set of keys and values, not overwriting any previous values. The ``other`` structure may be a list of two-tuples or a dictionary. If ``**kwargs`` is passed, its value *will* overwrite existing values.""" def getall(key): """ Return a list of all values matching the key (may be an empty list) """ def getone(key): """ Get one value matching the key, raising a KeyError if multiple values were found. """ def mixed(): """ Returns a dictionary where the values are either single values, or a list of values when a key/value appears more than once in this dictionary. This is similar to the kind of dictionary often used to represent the variables in a web request. """ # internal interfaces class IRequest(Interface): """ Request type interface attached to all request objects """ class ITweens(Interface): """ Marker interface for utility registration representing the ordered set of a configuration's tween factories""" class IRequestHandler(Interface): """ """ def __call__(self, request): """ Must return a tuple of IReqest, IResponse or raise an exception. The ``request`` argument will be an instance of an object that provides IRequest.""" IRequest.combined = IRequest # for exception view lookups class IRequestExtensions(Interface): """ Marker interface for storing request extensions (properties and methods) which will be added to the request object.""" descriptors = Attribute( """A list of descriptors that will be added to each request.""") methods = Attribute( """A list of methods to be added to each request.""") class IRouteRequest(Interface): """ *internal only* interface used as in a utility lookup to find route-specific interfaces. Not an API.""" class IStaticURLInfo(Interface): """ A policy for generating URLs to static assets """ def add(config, name, spec, **extra): """ Add a new static info registration """ def generate(path, request, **kw): """ Generate a URL for the given path """ def add_cache_buster(config, spec, cache_buster): """ Add a new cache buster to a particular set of assets """ class IResponseFactory(Interface): """ A utility which generates a response """ def __call__(request): """ Return a response object implementing IResponse, e.g. :class:`pyramid.response.Response`). It should handle the case when ``request`` is ``None``.""" class IRequestFactory(Interface): """ A utility which generates a request """ def __call__(environ): """ Return an instance of ``pyramid.request.Request``""" def blank(path): """ Return an empty request object (see :meth:`pyramid.request.Request.blank`)""" class IViewClassifier(Interface): """ *Internal only* marker interface for views.""" class IExceptionViewClassifier(Interface): """ *Internal only* marker interface for exception views.""" class IView(Interface): def __call__(context, request): """ Must return an object that implements IResponse. """ class ISecuredView(IView): """ *Internal only* interface. Not an API. """ def __call_permissive__(context, request): """ Guaranteed-permissive version of __call__ """ def __permitted__(context, request): """ Return True if view execution will be permitted using the context and request, False otherwise""" class IMultiView(ISecuredView): """ *internal only*. A multiview is a secured view that is a collection of other views. Each of the views is associated with zero or more predicates. Not an API.""" def add(view, predicates, order, accept=None, phash=None): """ Add a view to the multiview. """ class IRootFactory(Interface): def __call__(request): """ Return a root object based on the request """ class IDefaultRootFactory(Interface): def __call__(request): """ Return the *default* root object for an application """ class ITraverser(Interface): def __call__(request): """ Return a dictionary with (at least) the keys ``root``, ``context``, ``view_name``, ``subpath``, ``traversed``, ``virtual_root``, and ``virtual_root_path``. These values are typically the result of an object graph traversal. ``root`` is the physical root object, ``context`` will be a model object, ``view_name`` will be the view name used (a Unicode name), ``subpath`` will be a sequence of Unicode names that followed the view name but were not traversed, ``traversed`` will be a sequence of Unicode names that were traversed (including the virtual root path, if any) ``virtual_root`` will be a model object representing the virtual root (or the physical root if traversal was not performed), and ``virtual_root_path`` will be a sequence representing the virtual root path (a sequence of Unicode names) or ``None`` if traversal was not performed. Extra keys for special purpose functionality can be returned as necessary. All values returned in the dictionary will be made available as attributes of the ``request`` object by the :term:`router`. """ ITraverserFactory = ITraverser # b / c for 1.0 code class IViewPermission(Interface): def __call__(context, request): """ Return True if the permission allows, return False if it denies. """ class IRouter(Interface): """ WSGI application which routes requests to 'view' code based on a view registry.""" registry = Attribute( """Component architecture registry local to this application.""") class ISettings(Interface): """ Runtime settings utility for pyramid; represents the deployment settings for the application. Implements a mapping interface.""" # this interface, even if it becomes unused within Pyramid, is # imported by other packages (such as traversalwrapper) class ILocation(Interface): """Objects that have a structural location""" __parent__ = Attribute("The parent in the location hierarchy") __name__ = Attribute("The name within the parent") class IDebugLogger(Interface): """ Interface representing a PEP 282 logger """ ILogger = IDebugLogger # b/c class IRoutePregenerator(Interface): def __call__(request, elements, kw): """ A pregenerator is a function associated by a developer with a :term:`route`. The pregenerator for a route is called by :meth:`pyramid.request.Request.route_url` in order to adjust the set of arguments passed to it by the user for special purposes, such as Pylons 'subdomain' support. It will influence the URL returned by ``route_url``. A pregenerator should return a two-tuple of ``(elements, kw)`` after examining the originals passed to this function, which are the arguments ``(request, elements, kw)``. The simplest pregenerator is:: def pregenerator(request, elements, kw): return elements, kw You can employ a pregenerator by passing a ``pregenerator`` argument to the :meth:`pyramid.config.Configurator.add_route` function. """ class IRoute(Interface): """ Interface representing the type of object returned from ``IRoutesMapper.get_route``""" name = Attribute('The route name') pattern = Attribute('The route pattern') factory = Attribute( 'The :term:`root factory` used by the :app:`Pyramid` router ' 'when this route matches (or ``None``)') predicates = Attribute( 'A sequence of :term:`route predicate` objects used to ' 'determine if a request matches this route or not after ' 'basic pattern matching has been completed.') pregenerator = Attribute('This attribute should either be ``None`` or ' 'a callable object implementing the ' '``IRoutePregenerator`` interface') def match(path): """ If the ``path`` passed to this function can be matched by the ``pattern`` of this route, return a dictionary (the 'matchdict'), which will contain keys representing the dynamic segment markers in the pattern mapped to values extracted from the provided ``path``. If the ``path`` passed to this function cannot be matched by the ``pattern`` of this route, return ``None``. """ def generate(kw): """ Generate a URL based on filling in the dynamic segment markers in the pattern using the ``kw`` dictionary provided. """ class IRoutesMapper(Interface): """ Interface representing a Routes ``Mapper`` object """ def get_routes(): """ Return a sequence of Route objects registered in the mapper. Static routes will not be returned in this sequence.""" def has_routes(): """ Returns ``True`` if any route has been registered. """ def get_route(name): """ Returns an ``IRoute`` object if a route with the name ``name`` was registered, otherwise return ``None``.""" def connect(name, pattern, factory=None, predicates=(), pregenerator=None, static=True): """ Add a new route. """ def generate(name, kw): """ Generate a URL using the route named ``name`` with the keywords implied by kw""" def __call__(request): """ Return a dictionary containing matching information for the request; the ``route`` key of this dictionary will either be a Route object or ``None`` if no route matched; the ``match`` key will be the matchdict or ``None`` if no route matched. Static routes will not be considered for matching. """ class IResourceURL(Interface): virtual_path = Attribute( 'The virtual url path of the resource as a string.' ) physical_path = Attribute( 'The physical url path of the resource as a string.' ) virtual_path_tuple = Attribute( 'The virtual url path of the resource as a tuple. (New in 1.5)' ) physical_path_tuple = Attribute( 'The physical url path of the resource as a tuple. (New in 1.5)' ) class IContextURL(IResourceURL): """ .. deprecated:: 1.3 An adapter which deals with URLs related to a context. Use :class:`pyramid.interfaces.IResourceURL` instead. """ # this class subclasses IResourceURL because request.resource_url looks # for IResourceURL via queryAdapter. queryAdapter will find a deprecated # IContextURL registration if no registration for IResourceURL exists. # In reality, however, IContextURL objects were never required to have # the virtual_path or physical_path attributes spelled in IResourceURL. # The inheritance relationship is purely to benefit adapter lookup, # not to imply an inheritance relationship of interface attributes # and methods. # # Mechanics: # # class Fudge(object): # def __init__(self, one, two): # print(one, two) # class Another(object): # def __init__(self, one, two): # print(one, two) # ob = object() # r.registerAdapter(Fudge, (Interface, Interface), IContextURL) # print(r.queryMultiAdapter((ob, ob), IResourceURL)) # r.registerAdapter(Another, (Interface, Interface), IResourceURL) # print(r.queryMultiAdapter((ob, ob), IResourceURL)) # # prints # # # <__main__.Fudge object at 0x1cda890> # # <__main__.Another object at 0x1cda850> def virtual_root(): """ Return the virtual root related to a request and the current context""" def __call__(): """ Return a URL that points to the context. """ deprecated( 'IContextURL', 'As of Pyramid 1.3 the, "pyramid.interfaces.IContextURL" interface is ' 'scheduled to be removed. Use the ' '"pyramid.config.Configurator.add_resource_url_adapter" method to register ' 'a class that implements "pyramid.interfaces.IResourceURL" instead. ' 'See the "What\'s new In Pyramid 1.3" document for more details.' ) class IPEP302Loader(Interface): """ See http://www.python.org/dev/peps/pep-0302/#id30. """ def get_data(path): """ Retrieve data for and arbitrary "files" from storage backend. Raise IOError for not found. Data is returned as bytes. """ def is_package(fullname): """ Return True if the module specified by 'fullname' is a package. """ def get_code(fullname): """ Return the code object for the module identified by 'fullname'. Return 'None' if it's a built-in or extension module. If the loader doesn't have the code object but it does have the source code, return the compiled source code. Raise ImportError if the module can't be found by the importer at all. """ def get_source(fullname): """ Return the source code for the module identified by 'fullname'. Return a string, using newline characters for line endings, or None if the source is not available. Raise ImportError if the module can't be found by the importer at all. """ def get_filename(fullname): """ Return the value of '__file__' if the named module was loaded. If the module is not found, raise ImportError. """ class IPackageOverrides(IPEP302Loader): """ Utility for pkg_resources overrides """ # VH_ROOT_KEY is an interface; its imported from other packages (e.g. # traversalwrapper) VH_ROOT_KEY = 'HTTP_X_VHM_ROOT' class ILocalizer(Interface): """ Localizer for a specific language """ class ILocaleNegotiator(Interface): def __call__(request): """ Return a locale name """ class ITranslationDirectories(Interface): """ A list object representing all known translation directories for an application""" class IDefaultPermission(Interface): """ A string object representing the default permission to be used for all view configurations which do not explicitly declare their own.""" class ISessionFactory(Interface): """ An interface representing a factory which accepts a request object and returns an ISession object """ def __call__(request): """ Return an ISession object """ class ISession(IDict): """ An interface representing a session (a web session object, usually accessed via ``request.session``. Keys and values of a session must be pickleable. """ # attributes created = Attribute('Integer representing Epoch time when created.') new = Attribute('Boolean attribute. If ``True``, the session is new.') # special methods def invalidate(): """ Invalidate the session. The action caused by ``invalidate`` is implementation-dependent, but it should have the effect of completely dissociating any data stored in the session with the current request. It might set response values (such as one which clears a cookie), or it might not. An invalidated session may be used after the call to ``invalidate`` with the effect that a new session is created to store the data. This enables workflows requiring an entirely new session, such as in the case of changing privilege levels or preventing fixation attacks. """ def changed(): """ Mark the session as changed. A user of a session should call this method after he or she mutates a mutable object that is *a value of the session* (it should not be required after mutating the session itself). For example, if the user has stored a dictionary in the session under the key ``foo``, and he or she does ``session['foo'] = {}``, ``changed()`` needn't be called. However, if subsequently he or she does ``session['foo']['a'] = 1``, ``changed()`` must be called for the sessioning machinery to notice the mutation of the internal dictionary.""" def flash(msg, queue='', allow_duplicate=True): """ Push a flash message onto the end of the flash queue represented by ``queue``. An alternate flash message queue can used by passing an optional ``queue``, which must be a string. If ``allow_duplicate`` is false, if the ``msg`` already exists in the queue, it will not be re-added.""" def pop_flash(queue=''): """ Pop a queue from the flash storage. The queue is removed from flash storage after this message is called. The queue is returned; it is a list of flash messages added by :meth:`pyramid.interfaces.ISession.flash`""" def peek_flash(queue=''): """ Peek at a queue in the flash storage. The queue remains in flash storage after this message is called. The queue is returned; it is a list of flash messages added by :meth:`pyramid.interfaces.ISession.flash` """ def new_csrf_token(): """ Create and set into the session a new, random cross-site request forgery protection token. Return the token. It will be a string.""" def get_csrf_token(): """ Return a random cross-site request forgery protection token. It will be a string. If a token was previously added to the session via ``new_csrf_token``, that token will be returned. If no CSRF token was previously set into the session, ``new_csrf_token`` will be called, which will create and set a token, and this token will be returned. """ class IIntrospector(Interface): def get(category_name, discriminator, default=None): """ Get the IIntrospectable related to the category_name and the discriminator (or discriminator hash) ``discriminator``. If it does not exist in the introspector, return the value of ``default`` """ def get_category(category_name, default=None, sort_key=None): """ Get a sequence of dictionaries in the form ``[{'introspectable':IIntrospectable, 'related':[sequence of related IIntrospectables]}, ...]`` where each introspectable is part of the category associated with ``category_name`` . If the category named ``category_name`` does not exist in the introspector the value passed as ``default`` will be returned. If ``sort_key`` is ``None``, the sequence will be returned in the order the introspectables were added to the introspector. Otherwise, sort_key should be a function that accepts an IIntrospectable and returns a value from it (ala the ``key`` function of Python's ``sorted`` callable).""" def categories(): """ Return a sorted sequence of category names known by this introspector """ def categorized(sort_key=None): """ Get a sequence of tuples in the form ``[(category_name, [{'introspectable':IIntrospectable, 'related':[sequence of related IIntrospectables]}, ...])]`` representing all known introspectables. If ``sort_key`` is ``None``, each introspectables sequence will be returned in the order the introspectables were added to the introspector. Otherwise, sort_key should be a function that accepts an IIntrospectable and returns a value from it (ala the ``key`` function of Python's ``sorted`` callable).""" def remove(category_name, discriminator): """ Remove the IIntrospectable related to ``category_name`` and ``discriminator`` from the introspector, and fix up any relations that the introspectable participates in. This method will not raise an error if an introspectable related to the category name and discriminator does not exist.""" def related(intr): """ Return a sequence of IIntrospectables related to the IIntrospectable ``intr``. Return the empty sequence if no relations for exist.""" def add(intr): """ Add the IIntrospectable ``intr`` (use instead of :meth:`pyramid.interfaces.IIntrospector.add` when you have a custom IIntrospectable). Replaces any existing introspectable registered using the same category/discriminator. This method is not typically called directly, instead it's called indirectly by :meth:`pyramid.interfaces.IIntrospector.register`""" def relate(*pairs): """ Given any number of ``(category_name, discriminator)`` pairs passed as positional arguments, relate the associated introspectables to each other. The introspectable related to each pair must have already been added via ``.add`` or ``.add_intr``; a :exc:`KeyError` will result if this is not true. An error will not be raised if any pair has already been associated with another. This method is not typically called directly, instead it's called indirectly by :meth:`pyramid.interfaces.IIntrospector.register` """ def unrelate(*pairs): """ Given any number of ``(category_name, discriminator)`` pairs passed as positional arguments, unrelate the associated introspectables from each other. The introspectable related to each pair must have already been added via ``.add`` or ``.add_intr``; a :exc:`KeyError` will result if this is not true. An error will not be raised if any pair is not already related to another. This method is not typically called directly, instead it's called indirectly by :meth:`pyramid.interfaces.IIntrospector.register` """ class IIntrospectable(Interface): """ An introspectable object used for configuration introspection. In addition to the methods below, objects which implement this interface must also implement all the methods of Python's ``collections.MutableMapping`` (the "dictionary interface"), and must be hashable.""" title = Attribute('Text title describing this introspectable') type_name = Attribute('Text type name describing this introspectable') order = Attribute('integer order in which registered with introspector ' '(managed by introspector, usually)') category_name = Attribute('introspection category name') discriminator = Attribute('introspectable discriminator (within category) ' '(must be hashable)') discriminator_hash = Attribute('an integer hash of the discriminator') action_info = Attribute('An IActionInfo object representing the caller ' 'that invoked the creation of this introspectable ' '(usually a sentinel until updated during ' 'self.register)') def relate(category_name, discriminator): """ Indicate an intent to relate this IIntrospectable with another IIntrospectable (the one associated with the ``category_name`` and ``discriminator``) during action execution. """ def unrelate(category_name, discriminator): """ Indicate an intent to break the relationship between this IIntrospectable with another IIntrospectable (the one associated with the ``category_name`` and ``discriminator``) during action execution. """ def register(introspector, action_info): """ Register this IIntrospectable with an introspector. This method is invoked during action execution. Adds the introspectable and its relations to the introspector. ``introspector`` should be an object implementing IIntrospector. ``action_info`` should be a object implementing the interface :class:`pyramid.interfaces.IActionInfo` representing the call that registered this introspectable. Pseudocode for an implementation of this method: .. code-block:: python def register(self, introspector, action_info): self.action_info = action_info introspector.add(self) for methodname, category_name, discriminator in self._relations: method = getattr(introspector, methodname) method((i.category_name, i.discriminator), (category_name, discriminator)) """ def __hash__(): """ Introspectables must be hashable. The typical implementation of an introsepectable's __hash__ is:: return hash((self.category_name,) + (self.discriminator,)) """ class IActionInfo(Interface): """ Class which provides code introspection capability associated with an action. The ParserInfo class used by ZCML implements the same interface.""" file = Attribute( 'Filename of action-invoking code as a string') line = Attribute( 'Starting line number in file (as an integer) of action-invoking code.' 'This will be ``None`` if the value could not be determined.') def __str__(): """ Return a representation of the action information (including source code from file, if possible) """ class IAssetDescriptor(Interface): """ Describes an :term:`asset`. """ def absspec(): """ Returns the absolute asset specification for this asset (e.g. ``mypackage:templates/foo.pt``). """ def abspath(): """ Returns an absolute path in the filesystem to the asset. """ def stream(): """ Returns an input stream for reading asset contents. Raises an exception if the asset is a directory or does not exist. """ def isdir(): """ Returns True if the asset is a directory, otherwise returns False. """ def listdir(): """ Returns iterable of filenames of directory contents. Raises an exception if asset is not a directory. """ def exists(): """ Returns True if asset exists, otherwise returns False. """ class IJSONAdapter(Interface): """ Marker interface for objects that can convert an arbitrary object into a JSON-serializable primitive. """ class IPredicateList(Interface): """ Interface representing a predicate list """ class ICacheBuster(Interface): """ A cache buster modifies the URL generation machinery for :meth:`~pyramid.request.Request.static_url`. See :ref:`cache_busting`. .. versionadded:: 1.6 """ def __call__(request, subpath, kw): """ Modifies a subpath and/or keyword arguments from which a static asset URL will be computed during URL generation. The ``subpath`` argument is a path of ``/``-delimited segments that represent the portion of the asset URL which is used to find the asset. The ``kw`` argument is a dict of keywords that are to be passed eventually to :meth:`~pyramid.request.Request.static_url` for URL generation. The return value should be a two-tuple of ``(subpath, kw)`` where ``subpath`` is the relative URL from where the file is served and ``kw`` is the same input argument. The return value should be modified to include the cache bust token in the generated URL. The ``kw`` dictionary contains extra arguments passed to :meth:`~pyramid.request.Request.static_url` as well as some extra items that may be usful including: - ``pathspec`` is the path specification for the resource to be cache busted. - ``rawspec`` is the original location of the file, ignoring any calls to :meth:`pyramid.config.Configurator.override_asset`. The ``pathspec`` and ``rawspec`` values are only different in cases where an asset has been mounted into a virtual location using :meth:`pyramid.config.Configurator.override_asset`. For example, with a call to ``request.static_url('myapp:static/foo.png'), the ``pathspec`` is ``myapp:static/foo.png`` whereas the ``rawspec`` may be ``themepkg:bar.png``, assuming a call to ``config.override_asset('myapp:static/foo.png', 'themepkg:bar.png')``. """ # configuration phases: a lower phase number means the actions associated # with this phase will be executed earlier than those with later phase # numbers. The default phase number is 0, FTR. PHASE0_CONFIG = -30 PHASE1_CONFIG = -20 PHASE2_CONFIG = -10 PHASE3_CONFIG = 0