impuls/lib/python3.11/site-packages/routes/mapper.py

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"""Mapper and Sub-Mapper"""
import collections
import itertools as it
import re
import threading
from repoze.lru import LRUCache
import six
from routes import request_config
from routes.util import (
controller_scan,
RoutesException,
as_unicode
)
from routes.route import Route
COLLECTION_ACTIONS = ['index', 'create', 'new']
MEMBER_ACTIONS = ['show', 'update', 'delete', 'edit']
def strip_slashes(name):
"""Remove slashes from the beginning and end of a part/URL."""
if name.startswith('/'):
name = name[1:]
if name.endswith('/'):
name = name[:-1]
return name
class SubMapperParent(object):
"""Base class for Mapper and SubMapper, both of which may be the parent
of SubMapper objects
"""
def submapper(self, **kargs):
"""Create a partial version of the Mapper with the designated
options set
This results in a :class:`routes.mapper.SubMapper` object.
If keyword arguments provided to this method also exist in the
keyword arguments provided to the submapper, their values will
be merged with the saved options going first.
In addition to :class:`routes.route.Route` arguments, submapper
can also take a ``path_prefix`` argument which will be
prepended to the path of all routes that are connected.
Example::
>>> map = Mapper(controller_scan=None)
>>> map.connect('home', '/', controller='home', action='splash')
>>> map.matchlist[0].name == 'home'
True
>>> m = map.submapper(controller='home')
>>> m.connect('index', '/index', action='index')
>>> map.matchlist[1].name == 'index'
True
>>> map.matchlist[1].defaults['controller'] == 'home'
True
Optional ``collection_name`` and ``resource_name`` arguments are
used in the generation of route names by the ``action`` and
``link`` methods. These in turn are used by the ``index``,
``new``, ``create``, ``show``, ``edit``, ``update`` and
``delete`` methods which may be invoked indirectly by listing
them in the ``actions`` argument. If the ``formatted`` argument
is set to ``True`` (the default), generated paths are given the
suffix '{.format}' which matches or generates an optional format
extension.
Example::
>>> from routes.util import url_for
>>> map = Mapper(controller_scan=None)
>>> m = map.submapper(path_prefix='/entries', collection_name='entries', resource_name='entry', actions=['index', 'new'])
>>> url_for('entries') == '/entries'
True
>>> url_for('new_entry', format='xml') == '/entries/new.xml'
True
"""
return SubMapper(self, **kargs)
def collection(self, collection_name, resource_name, path_prefix=None,
member_prefix='/{id}', controller=None,
collection_actions=COLLECTION_ACTIONS,
member_actions=MEMBER_ACTIONS, member_options=None,
**kwargs):
"""Create a submapper that represents a collection.
This results in a :class:`routes.mapper.SubMapper` object, with a
``member`` property of the same type that represents the collection's
member resources.
Its interface is the same as the ``submapper`` together with
``member_prefix``, ``member_actions`` and ``member_options``
which are passed to the ``member`` submapper as ``path_prefix``,
``actions`` and keyword arguments respectively.
Example::
>>> from routes.util import url_for
>>> map = Mapper(controller_scan=None)
>>> c = map.collection('entries', 'entry')
>>> c.member.link('ping', method='POST')
>>> url_for('entries') == '/entries'
True
>>> url_for('edit_entry', id=1) == '/entries/1/edit'
True
>>> url_for('ping_entry', id=1) == '/entries/1/ping'
True
"""
if controller is None:
controller = resource_name or collection_name
if path_prefix is None:
if collection_name is None:
path_prefix_str = ''
else:
path_prefix_str = '/{collection_name}'
else:
if collection_name is None:
path_prefix_str = "{pre}"
else:
path_prefix_str = "{pre}/{collection_name}"
# generate what will be the path prefix for the collection
path_prefix = path_prefix_str.format(pre=path_prefix,
collection_name=collection_name)
collection = SubMapper(self, collection_name=collection_name,
resource_name=resource_name,
path_prefix=path_prefix, controller=controller,
actions=collection_actions, **kwargs)
collection.member = SubMapper(collection, path_prefix=member_prefix,
actions=member_actions,
**(member_options or {}))
return collection
class SubMapper(SubMapperParent):
"""Partial mapper for use with_options"""
def __init__(self, obj, resource_name=None, collection_name=None,
actions=None, formatted=None, **kwargs):
self.kwargs = kwargs
self.obj = obj
self.collection_name = collection_name
self.member = None
self.resource_name = resource_name \
or getattr(obj, 'resource_name', None) \
or kwargs.get('controller', None) \
or getattr(obj, 'controller', None)
if formatted is not None:
self.formatted = formatted
else:
self.formatted = getattr(obj, 'formatted', None)
if self.formatted is None:
self.formatted = True
self.add_actions(actions or [], **kwargs)
def connect(self, routename, path=None, **kwargs):
newkargs = {}
_routename = routename
_path = path
for key, value in six.iteritems(self.kwargs):
if key == 'path_prefix':
if path is not None:
# if there's a name_prefix, add it to the route name
# and if there's a path_prefix
_path = ''.join((self.kwargs[key], path))
else:
_path = ''.join((self.kwargs[key], routename))
elif key == 'name_prefix':
if path is not None:
# if there's a name_prefix, add it to the route name
# and if there's a path_prefix
_routename = ''.join((self.kwargs[key], routename))
else:
_routename = None
elif key in kwargs:
if isinstance(value, dict):
newkargs[key] = dict(value, **kwargs[key]) # merge dicts
else:
# Originally used this form:
# newkargs[key] = value + kwargs[key]
# New version avoids the inheritance concatenation issue
# with submappers. Only prefixes concatenate, everything
# else overrides in submappers.
newkargs[key] = kwargs[key]
else:
newkargs[key] = self.kwargs[key]
for key in kwargs:
if key not in self.kwargs:
newkargs[key] = kwargs[key]
newargs = (_routename, _path)
return self.obj.connect(*newargs, **newkargs)
def link(self, rel=None, name=None, action=None, method='GET',
formatted=None, **kwargs):
"""Generates a named route for a subresource.
Example::
>>> from routes.util import url_for
>>> map = Mapper(controller_scan=None)
>>> c = map.collection('entries', 'entry')
>>> c.link('recent', name='recent_entries')
>>> c.member.link('ping', method='POST', formatted=True)
>>> url_for('entries') == '/entries'
True
>>> url_for('recent_entries') == '/entries/recent'
True
>>> url_for('ping_entry', id=1) == '/entries/1/ping'
True
>>> url_for('ping_entry', id=1, format='xml') == '/entries/1/ping.xml'
True
"""
if formatted or (formatted is None and self.formatted):
suffix = '{.format}'
else:
suffix = ''
return self.connect(name or (rel + '_' + self.resource_name),
'/' + (rel or name) + suffix,
action=action or rel or name,
**_kwargs_with_conditions(kwargs, method))
def new(self, **kwargs):
"""Generates the "new" link for a collection submapper."""
return self.link(rel='new', **kwargs)
def edit(self, **kwargs):
"""Generates the "edit" link for a collection member submapper."""
return self.link(rel='edit', **kwargs)
def action(self, name=None, action=None, method='GET', formatted=None,
**kwargs):
"""Generates a named route at the base path of a submapper.
Example::
>>> from routes import url_for
>>> map = Mapper(controller_scan=None)
>>> c = map.submapper(path_prefix='/entries', controller='entry')
>>> c.action(action='index', name='entries', formatted=True)
>>> c.action(action='create', method='POST')
>>> url_for(controller='entry', action='index', method='GET') == '/entries'
True
>>> url_for(controller='entry', action='index', method='GET', format='xml') == '/entries.xml'
True
>>> url_for(controller='entry', action='create', method='POST') == '/entries'
True
"""
if formatted or (formatted is None and self.formatted):
suffix = '{.format}'
else:
suffix = ''
return self.connect(name or (action + '_' + self.resource_name),
suffix,
action=action or name,
**_kwargs_with_conditions(kwargs, method))
def index(self, name=None, **kwargs):
"""Generates the "index" action for a collection submapper."""
return self.action(name=name or self.collection_name,
action='index', method='GET', **kwargs)
def show(self, name=None, **kwargs):
"""Generates the "show" action for a collection member submapper."""
return self.action(name=name or self.resource_name,
action='show', method='GET', **kwargs)
def create(self, **kwargs):
"""Generates the "create" action for a collection submapper."""
return self.action(action='create', method='POST', **kwargs)
def update(self, **kwargs):
"""Generates the "update" action for a collection member submapper."""
return self.action(action='update', method='PUT', **kwargs)
def delete(self, **kwargs):
"""Generates the "delete" action for a collection member submapper."""
return self.action(action='delete', method='DELETE', **kwargs)
def add_actions(self, actions, **kwargs):
[getattr(self, action)(**kwargs) for action in actions]
# Provided for those who prefer using the 'with' syntax in Python 2.5+
def __enter__(self):
return self
def __exit__(self, type, value, tb):
pass
# Create kwargs with a 'conditions' member generated for the given method
def _kwargs_with_conditions(kwargs, method):
if method and 'conditions' not in kwargs:
newkwargs = kwargs.copy()
newkwargs['conditions'] = {'method': method}
return newkwargs
else:
return kwargs
class Mapper(SubMapperParent):
"""Mapper handles URL generation and URL recognition in a web
application.
Mapper is built handling dictionary's. It is assumed that the web
application will handle the dictionary returned by URL recognition
to dispatch appropriately.
URL generation is done by passing keyword parameters into the
generate function, a URL is then returned.
"""
def __init__(self, controller_scan=controller_scan, directory=None,
always_scan=False, register=True, explicit=True):
"""Create a new Mapper instance
All keyword arguments are optional.
``controller_scan``
Function reference that will be used to return a list of
valid controllers used during URL matching. If
``directory`` keyword arg is present, it will be passed
into the function during its call. This option defaults to
a function that will scan a directory for controllers.
Alternatively, a list of controllers or None can be passed
in which are assumed to be the definitive list of
controller names valid when matching 'controller'.
``directory``
Passed into controller_scan for the directory to scan. It
should be an absolute path if using the default
``controller_scan`` function.
``always_scan``
Whether or not the ``controller_scan`` function should be
run during every URL match. This is typically a good idea
during development so the server won't need to be restarted
anytime a controller is added.
``register``
Boolean used to determine if the Mapper should use
``request_config`` to register itself as the mapper. Since
it's done on a thread-local basis, this is typically best
used during testing though it won't hurt in other cases.
``explicit``
Boolean used to determine if routes should be connected
with implicit defaults of::
{'controller':'content','action':'index','id':None}
When set to True, these defaults will not be added to route
connections and ``url_for`` will not use Route memory.
Additional attributes that may be set after mapper
initialization (ie, map.ATTRIBUTE = 'something'):
``encoding``
Used to indicate alternative encoding/decoding systems to
use with both incoming URL's, and during Route generation
when passed a Unicode string. Defaults to 'utf-8'.
``decode_errors``
How to handle errors in the encoding, generally ignoring
any chars that don't convert should be sufficient. Defaults
to 'ignore'.
``minimization``
Boolean used to indicate whether or not Routes should
minimize URL's and the generated URL's, or require every
part where it appears in the path. Defaults to False.
``hardcode_names``
Whether or not Named Routes result in the default options
for the route being used *or* if they actually force url
generation to use the route. Defaults to False.
"""
self.matchlist = []
self.maxkeys = {}
self.minkeys = {}
self.urlcache = LRUCache(1600)
self._created_regs = False
self._created_gens = False
self._master_regexp = None
self.prefix = None
self.req_data = threading.local()
self.directory = directory
self.always_scan = always_scan
self.controller_scan = controller_scan
self._regprefix = None
self._routenames = {}
self.debug = False
self.append_slash = False
self.sub_domains = False
self.sub_domains_ignore = []
self.domain_match = r'[^\.\/]+?\.[^\.\/]+'
self.explicit = explicit
self.encoding = 'utf-8'
self.decode_errors = 'ignore'
self.hardcode_names = True
self.minimization = False
self.create_regs_lock = threading.Lock()
if register:
config = request_config()
config.mapper = self
def __str__(self):
"""Generates a tabular string representation."""
def format_methods(r):
if r.conditions:
method = r.conditions.get('method', '')
return type(method) is str and method or ', '.join(method)
else:
return ''
table = [('Route name', 'Methods', 'Path', 'Controller', 'action')] + \
[(r.name or '', format_methods(r), r.routepath or '',
r.defaults.get('controller', ''), r.defaults.get('action', ''))
for r in self.matchlist]
widths = [max(len(row[col]) for row in table)
for col in range(len(table[0]))]
return '\n'.join(
' '.join(row[col].ljust(widths[col])
for col in range(len(widths)))
for row in table)
def _envget(self):
try:
return self.req_data.environ
except AttributeError:
return None
def _envset(self, env):
self.req_data.environ = env
def _envdel(self):
del self.req_data.environ
environ = property(_envget, _envset, _envdel)
def extend(self, routes, path_prefix=''):
"""Extends the mapper routes with a list of Route objects
If a path_prefix is provided, all the routes will have their
path prepended with the path_prefix.
Example::
>>> map = Mapper(controller_scan=None)
>>> map.connect('home', '/', controller='home', action='splash')
>>> map.matchlist[0].name == 'home'
True
>>> routes = [Route('index', '/index.htm', controller='home',
... action='index')]
>>> map.extend(routes)
>>> len(map.matchlist) == 2
True
>>> map.extend(routes, path_prefix='/subapp')
>>> len(map.matchlist) == 3
True
>>> map.matchlist[2].routepath == '/subapp/index.htm'
True
.. note::
This function does not merely extend the mapper with the
given list of routes, it actually creates new routes with
identical calling arguments.
"""
for route in routes:
if path_prefix and route.minimization:
routepath = '/'.join([path_prefix, route.routepath])
elif path_prefix:
routepath = path_prefix + route.routepath
else:
routepath = route.routepath
self.connect(route.name,
routepath,
conditions=route.conditions,
**route._kargs
)
def make_route(self, *args, **kargs):
"""Make a new Route object
A subclass can override this method to use a custom Route class.
"""
return Route(*args, **kargs)
def connect(self, *args, **kargs):
"""Create and connect a new Route to the Mapper.
Usage:
.. code-block:: python
m = Mapper()
m.connect(':controller/:action/:id')
m.connect('date/:year/:month/:day', controller="blog",
action="view")
m.connect('archives/:page', controller="blog", action="by_page",
requirements = { 'page':'\\d{1,2}' })
m.connect('category_list', 'archives/category/:section',
controller='blog', action='category',
section='home', type='list')
m.connect('home', '', controller='blog', action='view',
section='home')
"""
routename = None
if len(args) > 1:
routename = args[0]
else:
args = (None,) + args
if '_explicit' not in kargs:
kargs['_explicit'] = self.explicit
if '_minimize' not in kargs:
kargs['_minimize'] = self.minimization
route = self.make_route(*args, **kargs)
# Apply encoding and errors if its not the defaults and the route
# didn't have one passed in.
if (self.encoding != 'utf-8' or self.decode_errors != 'ignore') and \
'_encoding' not in kargs:
route.encoding = self.encoding
route.decode_errors = self.decode_errors
if not route.static:
self.matchlist.append(route)
if routename:
self._routenames[routename] = route
route.name = routename
if route.static:
return
exists = False
for key in self.maxkeys:
if key == route.maxkeys:
self.maxkeys[key].append(route)
exists = True
break
if not exists:
self.maxkeys[route.maxkeys] = [route]
self._created_gens = False
def _create_gens(self):
"""Create the generation hashes for route lookups"""
# Use keys temporailly to assemble the list to avoid excessive
# list iteration testing with "in"
controllerlist = {}
actionlist = {}
# Assemble all the hardcoded/defaulted actions/controllers used
for route in self.matchlist:
if route.static:
continue
if 'controller' in route.defaults:
controllerlist[route.defaults['controller']] = True
if 'action' in route.defaults:
actionlist[route.defaults['action']] = True
# Setup the lists of all controllers/actions we'll add each route
# to. We include the '*' in the case that a generate contains a
# controller/action that has no hardcodes
controllerlist = list(controllerlist.keys()) + ['*']
actionlist = list(actionlist.keys()) + ['*']
# Go through our list again, assemble the controllers/actions we'll
# add each route to. If its hardcoded, we only add it to that dict key.
# Otherwise we add it to every hardcode since it can be changed.
gendict = {} # Our generated two-deep hash
for route in self.matchlist:
if route.static:
continue
clist = controllerlist
alist = actionlist
if 'controller' in route.hardcoded:
clist = [route.defaults['controller']]
if 'action' in route.hardcoded:
alist = [six.text_type(route.defaults['action'])]
for controller in clist:
for action in alist:
actiondict = gendict.setdefault(controller, {})
actiondict.setdefault(action, ([], {}))[0].append(route)
self._gendict = gendict
self._created_gens = True
def create_regs(self, *args, **kwargs):
"""Atomically creates regular expressions for all connected
routes
"""
self.create_regs_lock.acquire()
try:
self._create_regs(*args, **kwargs)
finally:
self.create_regs_lock.release()
def _create_regs(self, clist=None):
"""Creates regular expressions for all connected routes"""
if clist is None:
if self.directory:
clist = self.controller_scan(self.directory)
elif callable(self.controller_scan):
clist = self.controller_scan()
elif not self.controller_scan:
clist = []
else:
clist = self.controller_scan
for key, val in six.iteritems(self.maxkeys):
for route in val:
route.makeregexp(clist)
regexps = []
prefix2routes = collections.defaultdict(list)
for route in self.matchlist:
if not route.static:
regexps.append(route.makeregexp(clist, include_names=False))
# Group the routes by static prefix
prefix = ''.join(it.takewhile(lambda p: isinstance(p, str),
route.routelist))
if route.minimization and not prefix.startswith('/'):
prefix = '/' + prefix
prefix2routes[prefix.rstrip("/")].append(route)
self._prefix2routes = prefix2routes
# Keep track of all possible prefix lengths in decreasing order
self._prefix_lens = sorted(set(len(p) for p in prefix2routes),
reverse=True)
# Create our regexp to strip the prefix
if self.prefix:
self._regprefix = re.compile(self.prefix + '(.*)')
# Save the master regexp
regexp = '|'.join(['(?:%s)' % x for x in regexps])
self._master_reg = regexp
try:
self._master_regexp = re.compile(regexp)
except OverflowError:
self._master_regexp = None
self._created_regs = True
def _match(self, url, environ):
"""Internal Route matcher
Matches a URL against a route, and returns a tuple of the match
dict and the route object if a match is successfull, otherwise
it returns empty.
For internal use only.
"""
if not self._created_regs and self.controller_scan:
self.create_regs()
elif not self._created_regs:
raise RoutesException("You must generate the regular expressions"
" before matching.")
if self.always_scan:
self.create_regs()
matchlog = []
if self.prefix:
if re.match(self._regprefix, url):
url = re.sub(self._regprefix, r'\1', url)
if not url:
url = '/'
else:
return (None, None, matchlog)
environ = environ or self.environ
sub_domains = self.sub_domains
sub_domains_ignore = self.sub_domains_ignore
domain_match = self.domain_match
debug = self.debug
if self._master_regexp is not None:
# Check to see if its a valid url against the main regexp
# Done for faster invalid URL elimination
valid_url = re.match(self._master_regexp, url)
else:
# Regex is None due to OverflowError caused by too many routes.
# This will allow larger projects to work but might increase time
# spent invalidating URLs in the loop below.
valid_url = True
if not valid_url:
return (None, None, matchlog)
matchlist = it.chain.from_iterable(self._prefix2routes.get(url[:prefix_len], ())
for prefix_len in self._prefix_lens)
for route in matchlist:
if route.static:
if debug:
matchlog.append(dict(route=route, static=True))
continue
match = route.match(url, environ, sub_domains, sub_domains_ignore,
domain_match)
if debug:
matchlog.append(dict(route=route, regexp=bool(match)))
if isinstance(match, dict) or match:
return (match, route, matchlog)
return (None, None, matchlog)
def match(self, url=None, environ=None):
"""Match a URL against against one of the routes contained.
Will return None if no valid match is found.
.. code-block:: python
resultdict = m.match('/joe/sixpack')
"""
if url is None and not environ:
raise RoutesException('URL or environ must be provided')
if url is None:
url = environ['PATH_INFO']
result = self._match(url, environ)
if self.debug:
return result[0], result[1], result[2]
if isinstance(result[0], dict) or result[0]:
return result[0]
return None
def routematch(self, url=None, environ=None):
"""Match a URL against against one of the routes contained.
Will return None if no valid match is found, otherwise a
result dict and a route object is returned.
.. code-block:: python
resultdict, route_obj = m.match('/joe/sixpack')
"""
if url is None and not environ:
raise RoutesException('URL or environ must be provided')
if url is None:
url = environ['PATH_INFO']
result = self._match(url, environ)
if self.debug:
return result[0], result[1], result[2]
if isinstance(result[0], dict) or result[0]:
return result[0], result[1]
return None
def generate(self, *args, **kargs):
"""Generate a route from a set of keywords
Returns the url text, or None if no URL could be generated.
.. code-block:: python
m.generate(controller='content',action='view',id=10)
"""
# Generate ourself if we haven't already
if not self._created_gens:
self._create_gens()
if self.append_slash:
kargs['_append_slash'] = True
if not self.explicit:
if 'controller' not in kargs:
kargs['controller'] = 'content'
if 'action' not in kargs:
kargs['action'] = 'index'
environ = kargs.pop('_environ', self.environ) or {}
if 'SCRIPT_NAME' in environ:
script_name = environ['SCRIPT_NAME']
elif self.environ and 'SCRIPT_NAME' in self.environ:
script_name = self.environ['SCRIPT_NAME']
else:
script_name = ""
controller = kargs.get('controller', None)
action = kargs.get('action', None)
# If the URL didn't depend on the SCRIPT_NAME, we'll cache it
# keyed by just by kargs; otherwise we need to cache it with
# both SCRIPT_NAME and kargs:
cache_key = six.text_type(args).encode('utf8') + \
six.text_type(kargs).encode('utf8')
if self.urlcache is not None:
if six.PY3:
cache_key_script_name = b':'.join((script_name.encode('utf-8'),
cache_key))
else:
cache_key_script_name = '%s:%s' % (script_name, cache_key)
# Check the url cache to see if it exists, use it if it does
val = self.urlcache.get(cache_key_script_name, self)
if val != self:
return val
controller = as_unicode(controller, self.encoding)
action = as_unicode(action, self.encoding)
actionlist = self._gendict.get(controller) or self._gendict.get('*', {})
if not actionlist and not args:
return None
(keylist, sortcache) = actionlist.get(action) or \
actionlist.get('*', (None, {}))
if not keylist and not args:
return None
keys = frozenset(kargs.keys())
cacheset = False
cachekey = six.text_type(keys)
cachelist = sortcache.get(cachekey)
if args:
keylist = args
elif cachelist:
keylist = cachelist
else:
cacheset = True
newlist = []
for route in keylist:
if len(route.minkeys - route.dotkeys - keys) == 0:
newlist.append(route)
keylist = newlist
class KeySorter:
def __init__(self, obj, *args):
self.obj = obj
def __lt__(self, other):
return self._keysort(self.obj, other.obj) < 0
def _keysort(self, a, b):
"""Sorts two sets of sets, to order them ideally for
matching."""
a = a.maxkeys
b = b.maxkeys
lendiffa = len(keys ^ a)
lendiffb = len(keys ^ b)
# If they both match, don't switch them
if lendiffa == 0 and lendiffb == 0:
return 0
# First, if a matches exactly, use it
if lendiffa == 0:
return -1
# Or b matches exactly, use it
if lendiffb == 0:
return 1
# Neither matches exactly, return the one with the most in
# common
if self._compare(lendiffa, lendiffb) != 0:
return self._compare(lendiffa, lendiffb)
# Neither matches exactly, but if they both have just as
# much in common
if len(keys & b) == len(keys & a):
# Then we return the shortest of the two
return self._compare(len(a), len(b))
# Otherwise, we return the one that has the most in common
else:
return self._compare(len(keys & b), len(keys & a))
def _compare(self, obj1, obj2):
if obj1 < obj2:
return -1
elif obj1 < obj2:
return 1
else:
return 0
keylist.sort(key=KeySorter)
if cacheset:
sortcache[cachekey] = keylist
# Iterate through the keylist of sorted routes (or a single route if
# it was passed in explicitly for hardcoded named routes)
for route in keylist:
fail = False
for key in route.hardcoded:
kval = kargs.get(key)
if not kval:
continue
kval = as_unicode(kval, self.encoding)
if kval != route.defaults[key] and \
not callable(route.defaults[key]):
fail = True
break
if fail:
continue
path = route.generate(**kargs)
if path:
if self.prefix:
path = self.prefix + path
external_static = route.static and route.external
if not route.absolute and not external_static:
path = script_name + path
key = cache_key_script_name
else:
key = cache_key
if self.urlcache is not None:
self.urlcache.put(key, str(path))
return str(path)
else:
continue
return None
def resource(self, member_name, collection_name, **kwargs):
"""Generate routes for a controller resource
The member_name name should be the appropriate singular version
of the resource given your locale and used with members of the
collection. The collection_name name will be used to refer to
the resource collection methods and should be a plural version
of the member_name argument. By default, the member_name name
will also be assumed to map to a controller you create.
The concept of a web resource maps somewhat directly to 'CRUD'
operations. The overlying things to keep in mind is that
mapping a resource is about handling creating, viewing, and
editing that resource.
All keyword arguments are optional.
``controller``
If specified in the keyword args, the controller will be
the actual controller used, but the rest of the naming
conventions used for the route names and URL paths are
unchanged.
``collection``
Additional action mappings used to manipulate/view the
entire set of resources provided by the controller.
Example::
map.resource('message', 'messages', collection={'rss':'GET'})
# GET /message/rss (maps to the rss action)
# also adds named route "rss_message"
``member``
Additional action mappings used to access an individual
'member' of this controllers resources.
Example::
map.resource('message', 'messages', member={'mark':'POST'})
# POST /message/1/mark (maps to the mark action)
# also adds named route "mark_message"
``new``
Action mappings that involve dealing with a new member in
the controller resources.
Example::
map.resource('message', 'messages', new={'preview':'POST'})
# POST /message/new/preview (maps to the preview action)
# also adds a url named "preview_new_message"
``path_prefix``
Prepends the URL path for the Route with the path_prefix
given. This is most useful for cases where you want to mix
resources or relations between resources.
``name_prefix``
Perpends the route names that are generated with the
name_prefix given. Combined with the path_prefix option,
it's easy to generate route names and paths that represent
resources that are in relations.
Example::
map.resource('message', 'messages', controller='categories',
path_prefix='/category/:category_id',
name_prefix="category_")
# GET /category/7/message/1
# has named route "category_message"
``requirements``
A dictionary that restricts the matching of a
variable. Can be used when matching variables with path_prefix.
Example::
map.resource('message', 'messages',
path_prefix='{project_id}/',
requirements={"project_id": R"\\d+"})
# POST /01234/message
# success, project_id is set to "01234"
# POST /foo/message
# 404 not found, won't be matched by this route
``parent_resource``
A ``dict`` containing information about the parent
resource, for creating a nested resource. It should contain
the ``member_name`` and ``collection_name`` of the parent
resource. This ``dict`` will
be available via the associated ``Route`` object which can
be accessed during a request via
``request.environ['routes.route']``
If ``parent_resource`` is supplied and ``path_prefix``
isn't, ``path_prefix`` will be generated from
``parent_resource`` as
"<parent collection name>/:<parent member name>_id".
If ``parent_resource`` is supplied and ``name_prefix``
isn't, ``name_prefix`` will be generated from
``parent_resource`` as "<parent member name>_".
Example::
>>> from routes.util import url_for
>>> m = Mapper()
>>> m.resource('location', 'locations',
... parent_resource=dict(member_name='region',
... collection_name='regions'))
>>> # path_prefix is "regions/:region_id"
>>> # name prefix is "region_"
>>> url_for('region_locations', region_id=13)
'/regions/13/locations'
>>> url_for('region_new_location', region_id=13)
'/regions/13/locations/new'
>>> url_for('region_location', region_id=13, id=60)
'/regions/13/locations/60'
>>> url_for('region_edit_location', region_id=13, id=60)
'/regions/13/locations/60/edit'
Overriding generated ``path_prefix``::
>>> m = Mapper()
>>> m.resource('location', 'locations',
... parent_resource=dict(member_name='region',
... collection_name='regions'),
... path_prefix='areas/:area_id')
>>> # name prefix is "region_"
>>> url_for('region_locations', area_id=51)
'/areas/51/locations'
Overriding generated ``name_prefix``::
>>> m = Mapper()
>>> m.resource('location', 'locations',
... parent_resource=dict(member_name='region',
... collection_name='regions'),
... name_prefix='')
>>> # path_prefix is "regions/:region_id"
>>> url_for('locations', region_id=51)
'/regions/51/locations'
"""
collection = kwargs.pop('collection', {})
member = kwargs.pop('member', {})
new = kwargs.pop('new', {})
path_prefix = kwargs.pop('path_prefix', None)
name_prefix = kwargs.pop('name_prefix', None)
parent_resource = kwargs.pop('parent_resource', None)
# Generate ``path_prefix`` if ``path_prefix`` wasn't specified and
# ``parent_resource`` was. Likewise for ``name_prefix``. Make sure
# that ``path_prefix`` and ``name_prefix`` *always* take precedence if
# they are specified--in particular, we need to be careful when they
# are explicitly set to "".
if parent_resource is not None:
if path_prefix is None:
path_prefix = '%s/:%s_id' % (parent_resource['collection_name'],
parent_resource['member_name'])
if name_prefix is None:
name_prefix = '%s_' % parent_resource['member_name']
else:
if path_prefix is None:
path_prefix = ''
if name_prefix is None:
name_prefix = ''
# Ensure the edit and new actions are in and GET
member['edit'] = 'GET'
new.update({'new': 'GET'})
# Make new dict's based off the old, except the old values become keys,
# and the old keys become items in a list as the value
def swap(dct, newdct):
"""Swap the keys and values in the dict, and uppercase the values
from the dict during the swap."""
for key, val in six.iteritems(dct):
newdct.setdefault(val.upper(), []).append(key)
return newdct
collection_methods = swap(collection, {})
member_methods = swap(member, {})
new_methods = swap(new, {})
# Insert create, update, and destroy methods
collection_methods.setdefault('POST', []).insert(0, 'create')
member_methods.setdefault('PUT', []).insert(0, 'update')
member_methods.setdefault('DELETE', []).insert(0, 'delete')
# If there's a path prefix option, use it with the controller
controller = strip_slashes(collection_name)
path_prefix = strip_slashes(path_prefix)
path_prefix = '/' + path_prefix
if path_prefix and path_prefix != '/':
path = path_prefix + '/' + controller
else:
path = '/' + controller
collection_path = path
new_path = path + "/new"
member_path = path + "/:(id)"
options = {
'controller': kwargs.get('controller', controller),
'_member_name': member_name,
'_collection_name': collection_name,
'_parent_resource': parent_resource,
'_filter': kwargs.get('_filter')
}
if 'requirements' in kwargs:
options['requirements'] = kwargs['requirements']
def requirements_for(meth):
"""Returns a new dict to be used for all route creation as the
route options"""
opts = options.copy()
if method != 'any':
opts['conditions'] = {'method': [meth.upper()]}
return opts
# Add the routes for handling collection methods
for method, lst in six.iteritems(collection_methods):
primary = (method != 'GET' and lst.pop(0)) or None
route_options = requirements_for(method)
for action in lst:
route_options['action'] = action
route_name = "%s%s_%s" % (name_prefix, action, collection_name)
self.connect("formatted_" + route_name, "%s/%s.:(format)" %
(collection_path, action), **route_options)
self.connect(route_name, "%s/%s" % (collection_path, action),
**route_options)
if primary:
route_options['action'] = primary
self.connect("%s.:(format)" % collection_path, **route_options)
self.connect(collection_path, **route_options)
# Specifically add in the built-in 'index' collection method and its
# formatted version
self.connect("formatted_" + name_prefix + collection_name,
collection_path + ".:(format)", action='index',
conditions={'method': ['GET']}, **options)
self.connect(name_prefix + collection_name, collection_path,
action='index', conditions={'method': ['GET']}, **options)
# Add the routes that deal with new resource methods
for method, lst in six.iteritems(new_methods):
route_options = requirements_for(method)
for action in lst:
name = "new_" + member_name
route_options['action'] = action
if action == 'new':
path = new_path
formatted_path = new_path + '.:(format)'
else:
path = "%s/%s" % (new_path, action)
name = action + "_" + name
formatted_path = "%s/%s.:(format)" % (new_path, action)
self.connect("formatted_" + name_prefix + name, formatted_path,
**route_options)
self.connect(name_prefix + name, path, **route_options)
requirements_regexp = '[^\\/]+(?<!\\\\)'
# Add the routes that deal with member methods of a resource
for method, lst in six.iteritems(member_methods):
route_options = requirements_for(method)
route_options['requirements'] = {'id': requirements_regexp}
if method not in ['POST', 'GET', 'any']:
primary = lst.pop(0)
else:
primary = None
for action in lst:
route_options['action'] = action
self.connect("formatted_%s%s_%s" % (name_prefix, action,
member_name),
"%s/%s.:(format)" % (member_path, action),
**route_options)
self.connect("%s%s_%s" % (name_prefix, action, member_name),
"%s/%s" % (member_path, action), **route_options)
if primary:
route_options['action'] = primary
self.connect("%s.:(format)" % member_path, **route_options)
self.connect(member_path, **route_options)
# Specifically add the member 'show' method
route_options = requirements_for('GET')
route_options['action'] = 'show'
route_options['requirements'] = {'id': requirements_regexp}
self.connect("formatted_" + name_prefix + member_name,
member_path + ".:(format)", **route_options)
self.connect(name_prefix + member_name, member_path, **route_options)
def redirect(self, match_path, destination_path, *args, **kwargs):
"""Add a redirect route to the mapper
Redirect routes bypass the wrapped WSGI application and instead
result in a redirect being issued by the RoutesMiddleware. As
such, this method is only meaningful when using
RoutesMiddleware.
By default, a 302 Found status code is used, this can be
changed by providing a ``_redirect_code`` keyword argument
which will then be used instead. Note that the entire status
code string needs to be present.
When using keyword arguments, all arguments that apply to
matching will be used for the match, while generation specific
options will be used during generation. Thus all options
normally available to connected Routes may be used with
redirect routes as well.
Example::
map = Mapper()
map.redirect('/legacyapp/archives/{url:.*}', '/archives/{url}')
map.redirect('/home/index', '/',
_redirect_code='301 Moved Permanently')
"""
both_args = ['_encoding', '_explicit', '_minimize']
gen_args = ['_filter']
status_code = kwargs.pop('_redirect_code', '302 Found')
gen_dict, match_dict = {}, {}
# Create the dict of args for the generation route
for key in both_args + gen_args:
if key in kwargs:
gen_dict[key] = kwargs[key]
gen_dict['_static'] = True
# Create the dict of args for the matching route
for key in kwargs:
if key not in gen_args:
match_dict[key] = kwargs[key]
self.connect(match_path, **match_dict)
match_route = self.matchlist[-1]
self.connect('_redirect_%s' % id(match_route), destination_path,
**gen_dict)
match_route.redirect = True
match_route.redirect_status = status_code