
Webob passed duplicates parameters to pecan, but pecan take only the first one. This patch changes than and pass the duplicated parameters as list to controller method. Closes bug: #1401123 Change-Id: I8d0a7eda30a4c03cd85ed730ac3f08dde5e9aa56
831 lines
30 KiB
Python
831 lines
30 KiB
Python
try:
|
|
from simplejson import dumps, loads
|
|
except ImportError: # pragma: no cover
|
|
from json import dumps, loads # noqa
|
|
from inspect import Arguments
|
|
from itertools import chain, tee
|
|
from mimetypes import guess_type, add_type
|
|
from os.path import splitext
|
|
import logging
|
|
import operator
|
|
import types
|
|
|
|
import six
|
|
if six.PY3:
|
|
from .compat import is_bound_method as ismethod
|
|
else:
|
|
from inspect import ismethod
|
|
|
|
from webob import (Request as WebObRequest, Response as WebObResponse, exc,
|
|
acceptparse)
|
|
from webob.multidict import NestedMultiDict
|
|
|
|
from .compat import urlparse, unquote_plus, izip
|
|
from .secure import handle_security
|
|
from .templating import RendererFactory
|
|
from .routing import lookup_controller, NonCanonicalPath
|
|
from .util import _cfg, encode_if_needed, getargspec
|
|
from .middleware.recursive import ForwardRequestException
|
|
|
|
|
|
# make sure that json is defined in mimetypes
|
|
add_type('application/json', '.json', True)
|
|
|
|
state = None
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class RoutingState(object):
|
|
|
|
def __init__(self, request, response, app, hooks=[], controller=None,
|
|
arguments=None):
|
|
self.request = request
|
|
self.response = response
|
|
self.app = app
|
|
self.hooks = hooks
|
|
self.controller = controller
|
|
self.arguments = arguments
|
|
|
|
|
|
class Request(WebObRequest):
|
|
pass
|
|
|
|
|
|
class Response(WebObResponse):
|
|
pass
|
|
|
|
|
|
def proxy(key):
|
|
class ObjectProxy(object):
|
|
|
|
explanation_ = AttributeError(
|
|
"`pecan.state` is not bound to a context-local context.\n"
|
|
"Ensure that you're accessing `pecan.request` or `pecan.response` "
|
|
"from within the context of a WSGI `__call__` and that "
|
|
"`use_context_locals` = True."
|
|
)
|
|
|
|
def __getattr__(self, attr):
|
|
try:
|
|
obj = getattr(state, key)
|
|
except AttributeError:
|
|
raise self.explanation_
|
|
return getattr(obj, attr)
|
|
|
|
def __setattr__(self, attr, value):
|
|
obj = getattr(state, key)
|
|
return setattr(obj, attr, value)
|
|
|
|
def __delattr__(self, attr):
|
|
obj = getattr(state, key)
|
|
return delattr(obj, attr)
|
|
|
|
def __dir__(self):
|
|
obj = getattr(state, key)
|
|
return dir(obj)
|
|
|
|
return ObjectProxy()
|
|
|
|
|
|
request = proxy('request')
|
|
response = proxy('response')
|
|
|
|
|
|
def override_template(template, content_type=None):
|
|
'''
|
|
Call within a controller to override the template that is used in
|
|
your response.
|
|
|
|
:param template: a valid path to a template file, just as you would specify
|
|
in an ``@expose``.
|
|
:param content_type: a valid MIME type to use for the response.func_closure
|
|
'''
|
|
|
|
request.pecan['override_template'] = template
|
|
if content_type:
|
|
request.pecan['override_content_type'] = content_type
|
|
|
|
|
|
def abort(status_code=None, detail='', headers=None, comment=None, **kw):
|
|
'''
|
|
Raise an HTTP status code, as specified. Useful for returning status
|
|
codes like 401 Unauthorized or 403 Forbidden.
|
|
|
|
:param status_code: The HTTP status code as an integer.
|
|
:param detail: The message to send along, as a string.
|
|
:param headers: A dictionary of headers to send along with the response.
|
|
:param comment: A comment to include in the response.
|
|
'''
|
|
|
|
raise exc.status_map[status_code](
|
|
detail=detail,
|
|
headers=headers,
|
|
comment=comment,
|
|
**kw
|
|
)
|
|
|
|
|
|
def redirect(location=None, internal=False, code=None, headers={},
|
|
add_slash=False, request=None):
|
|
'''
|
|
Perform a redirect, either internal or external. An internal redirect
|
|
performs the redirect server-side, while the external redirect utilizes
|
|
an HTTP 302 status code.
|
|
|
|
:param location: The HTTP location to redirect to.
|
|
:param internal: A boolean indicating whether the redirect should be
|
|
internal.
|
|
:param code: The HTTP status code to use for the redirect. Defaults to 302.
|
|
:param headers: Any HTTP headers to send with the response, as a
|
|
dictionary.
|
|
:param request: The :class:`pecan.Request` instance to use.
|
|
'''
|
|
request = request or state.request
|
|
|
|
if add_slash:
|
|
if location is None:
|
|
split_url = list(urlparse.urlsplit(request.url))
|
|
new_proto = request.environ.get(
|
|
'HTTP_X_FORWARDED_PROTO', split_url[0]
|
|
)
|
|
split_url[0] = new_proto
|
|
else:
|
|
split_url = urlparse.urlsplit(location)
|
|
|
|
split_url[2] = split_url[2].rstrip('/') + '/'
|
|
location = urlparse.urlunsplit(split_url)
|
|
|
|
if not headers:
|
|
headers = {}
|
|
if internal:
|
|
if code is not None:
|
|
raise ValueError('Cannot specify a code for internal redirects')
|
|
request.environ['pecan.recursive.context'] = request.context
|
|
raise ForwardRequestException(location)
|
|
if code is None:
|
|
code = 302
|
|
raise exc.status_map[code](location=location, headers=headers)
|
|
|
|
|
|
def render(template, namespace, app=None):
|
|
'''
|
|
Render the specified template using the Pecan rendering framework
|
|
with the specified template namespace as a dictionary. Useful in a
|
|
controller where you have no template specified in the ``@expose``.
|
|
|
|
:param template: The path to your template, as you would specify in
|
|
``@expose``.
|
|
:param namespace: The namespace to use for rendering the template, as a
|
|
dictionary.
|
|
:param app: The instance of :class:`pecan.Pecan` to use
|
|
'''
|
|
app = app or state.app
|
|
return app.render(template, namespace)
|
|
|
|
|
|
def load_app(config, **kwargs):
|
|
'''
|
|
Used to load a ``Pecan`` application and its environment based on passed
|
|
configuration.
|
|
|
|
:param config: Can be a dictionary containing configuration, a string which
|
|
represents a (relative) configuration filename
|
|
|
|
returns a pecan.Pecan object
|
|
'''
|
|
from .configuration import _runtime_conf, set_config
|
|
set_config(config, overwrite=True)
|
|
|
|
for package_name in getattr(_runtime_conf.app, 'modules', []):
|
|
module = __import__(package_name, fromlist=['app'])
|
|
if hasattr(module, 'app') and hasattr(module.app, 'setup_app'):
|
|
app = module.app.setup_app(_runtime_conf, **kwargs)
|
|
app.config = _runtime_conf
|
|
return app
|
|
raise RuntimeError(
|
|
'No app.setup_app found in any of the configured app.modules'
|
|
)
|
|
|
|
|
|
class PecanBase(object):
|
|
|
|
SIMPLEST_CONTENT_TYPES = (
|
|
['text/html'],
|
|
['text/plain']
|
|
)
|
|
|
|
def __init__(self, root, default_renderer='mako',
|
|
template_path='templates', hooks=lambda: [],
|
|
custom_renderers={}, extra_template_vars={},
|
|
force_canonical=True, guess_content_type_from_ext=True,
|
|
context_local_factory=None, request_cls=Request,
|
|
response_cls=Response, **kw):
|
|
if isinstance(root, six.string_types):
|
|
root = self.__translate_root__(root)
|
|
|
|
self.root = root
|
|
self.request_cls = request_cls
|
|
self.response_cls = response_cls
|
|
self.renderers = RendererFactory(custom_renderers, extra_template_vars)
|
|
self.default_renderer = default_renderer
|
|
|
|
# pre-sort these so we don't have to do it per-request
|
|
if six.callable(hooks):
|
|
hooks = hooks()
|
|
|
|
self.hooks = list(sorted(
|
|
hooks,
|
|
key=operator.attrgetter('priority')
|
|
))
|
|
self.template_path = template_path
|
|
self.force_canonical = force_canonical
|
|
self.guess_content_type_from_ext = guess_content_type_from_ext
|
|
|
|
def __translate_root__(self, item):
|
|
'''
|
|
Creates a root controller instance from a string root, e.g.,
|
|
|
|
> __translate_root__("myproject.controllers.RootController")
|
|
myproject.controllers.RootController()
|
|
|
|
:param item: The string to the item
|
|
'''
|
|
|
|
if '.' in item:
|
|
parts = item.split('.')
|
|
name = '.'.join(parts[:-1])
|
|
fromlist = parts[-1:]
|
|
|
|
module = __import__(name, fromlist=fromlist)
|
|
kallable = getattr(module, parts[-1])
|
|
msg = "%s does not represent a callable class or function."
|
|
if not six.callable(kallable):
|
|
raise TypeError(msg % item)
|
|
return kallable()
|
|
|
|
raise ImportError('No item named %s' % item)
|
|
|
|
def route(self, req, node, path):
|
|
'''
|
|
Looks up a controller from a node based upon the specified path.
|
|
|
|
:param node: The node, such as a root controller object.
|
|
:param path: The path to look up on this node.
|
|
'''
|
|
path = path.split('/')[1:]
|
|
try:
|
|
node, remainder = lookup_controller(node, path, req)
|
|
return node, remainder
|
|
except NonCanonicalPath as e:
|
|
if self.force_canonical and \
|
|
not _cfg(e.controller).get('accept_noncanonical', False):
|
|
if req.method == 'POST':
|
|
raise RuntimeError(
|
|
"You have POSTed to a URL '%s' which "
|
|
"requires a slash. Most browsers will not maintain "
|
|
"POST data when redirected. Please update your code "
|
|
"to POST to '%s/' or set force_canonical to False" %
|
|
(req.pecan['routing_path'],
|
|
req.pecan['routing_path'])
|
|
)
|
|
redirect(code=302, add_slash=True, request=req)
|
|
return e.controller, e.remainder
|
|
|
|
def determine_hooks(self, controller=None):
|
|
'''
|
|
Determines the hooks to be run, in which order.
|
|
|
|
:param controller: If specified, includes hooks for a specific
|
|
controller.
|
|
'''
|
|
|
|
controller_hooks = []
|
|
if controller:
|
|
controller_hooks = _cfg(controller).get('hooks', [])
|
|
if controller_hooks:
|
|
return list(
|
|
sorted(
|
|
chain(controller_hooks, self.hooks),
|
|
key=operator.attrgetter('priority')
|
|
)
|
|
)
|
|
return self.hooks
|
|
|
|
def handle_hooks(self, hooks, hook_type, *args):
|
|
'''
|
|
Processes hooks of the specified type.
|
|
|
|
:param hook_type: The type of hook, including ``before``, ``after``,
|
|
``on_error``, and ``on_route``.
|
|
:param \*args: Arguments to pass to the hooks.
|
|
'''
|
|
if hook_type not in ['before', 'on_route']:
|
|
hooks = reversed(hooks)
|
|
|
|
for hook in hooks:
|
|
result = getattr(hook, hook_type)(*args)
|
|
# on_error hooks can choose to return a Response, which will
|
|
# be used instead of the standard error pages.
|
|
if hook_type == 'on_error' and isinstance(result, WebObResponse):
|
|
return result
|
|
|
|
def get_args(self, state, all_params, remainder, argspec, im_self):
|
|
'''
|
|
Determines the arguments for a controller based upon parameters
|
|
passed the argument specification for the controller.
|
|
'''
|
|
args = []
|
|
varargs = []
|
|
kwargs = dict()
|
|
valid_args = argspec.args[1:] # pop off `self`
|
|
pecan_state = state.request.pecan
|
|
|
|
def _decode(x):
|
|
return unquote_plus(x) if isinstance(x, six.string_types) \
|
|
else x
|
|
|
|
remainder = [_decode(x) for x in remainder if x]
|
|
|
|
if im_self is not None:
|
|
args.append(im_self)
|
|
|
|
# grab the routing args from nested REST controllers
|
|
if 'routing_args' in pecan_state:
|
|
remainder = pecan_state['routing_args'] + list(remainder)
|
|
del pecan_state['routing_args']
|
|
|
|
# handle positional arguments
|
|
if valid_args and remainder:
|
|
args.extend(remainder[:len(valid_args)])
|
|
remainder = remainder[len(valid_args):]
|
|
valid_args = valid_args[len(args):]
|
|
|
|
# handle wildcard arguments
|
|
if [i for i in remainder if i]:
|
|
if not argspec[1]:
|
|
abort(404)
|
|
varargs.extend(remainder)
|
|
|
|
# get the default positional arguments
|
|
if argspec[3]:
|
|
defaults = dict(izip(argspec[0][-len(argspec[3]):], argspec[3]))
|
|
else:
|
|
defaults = dict()
|
|
|
|
# handle positional GET/POST params
|
|
for name in valid_args:
|
|
if name in all_params:
|
|
args.append(all_params.pop(name))
|
|
elif name in defaults:
|
|
args.append(defaults[name])
|
|
else:
|
|
break
|
|
|
|
# handle wildcard GET/POST params
|
|
if argspec[2]:
|
|
for name, value in six.iteritems(all_params):
|
|
if name not in argspec[0]:
|
|
kwargs[encode_if_needed(name)] = value
|
|
|
|
return args, varargs, kwargs
|
|
|
|
def render(self, template, namespace):
|
|
renderer = self.renderers.get(
|
|
self.default_renderer,
|
|
self.template_path
|
|
)
|
|
if template == 'json':
|
|
renderer = self.renderers.get('json', self.template_path)
|
|
if ':' in template:
|
|
renderer = self.renderers.get(
|
|
template.split(':')[0],
|
|
self.template_path
|
|
)
|
|
template = template.split(':')[1]
|
|
return renderer.render(template, namespace)
|
|
|
|
def find_controller(self, state):
|
|
'''
|
|
The main request handler for Pecan applications.
|
|
'''
|
|
# get a sorted list of hooks, by priority (no controller hooks yet)
|
|
req = state.request
|
|
pecan_state = req.pecan
|
|
|
|
# store the routing path for the current application to allow hooks to
|
|
# modify it
|
|
pecan_state['routing_path'] = path = req.encget('PATH_INFO')
|
|
|
|
# handle "on_route" hooks
|
|
self.handle_hooks(self.hooks, 'on_route', state)
|
|
|
|
# lookup the controller, respecting content-type as requested
|
|
# by the file extension on the URI
|
|
pecan_state['extension'] = None
|
|
|
|
# attempt to guess the content type based on the file extension
|
|
if self.guess_content_type_from_ext \
|
|
and not pecan_state['content_type'] \
|
|
and '.' in path:
|
|
new_path, extension = splitext(path)
|
|
|
|
# preface with a letter to ensure compat for 2.5
|
|
potential_type = guess_type('x' + extension)[0]
|
|
|
|
if potential_type is not None:
|
|
path = new_path
|
|
pecan_state['extension'] = extension
|
|
pecan_state['content_type'] = potential_type
|
|
|
|
controller, remainder = self.route(req, self.root, path)
|
|
cfg = _cfg(controller)
|
|
|
|
if cfg.get('generic_handler'):
|
|
raise exc.HTTPNotFound
|
|
|
|
# handle generic controllers
|
|
im_self = None
|
|
if cfg.get('generic'):
|
|
im_self = six.get_method_self(controller)
|
|
handlers = cfg['generic_handlers']
|
|
controller = handlers.get(req.method, handlers['DEFAULT'])
|
|
handle_security(controller, im_self)
|
|
cfg = _cfg(controller)
|
|
|
|
# add the controller to the state so that hooks can use it
|
|
state.controller = controller
|
|
|
|
# if unsure ask the controller for the default content type
|
|
content_types = cfg.get('content_types', {})
|
|
if not pecan_state['content_type']:
|
|
# attempt to find a best match based on accept headers (if they
|
|
# exist)
|
|
accept = getattr(req.accept, 'header_value', '*/*')
|
|
if accept == '*/*' or (
|
|
accept.startswith('text/html,') and
|
|
list(content_types.keys()) in self.SIMPLEST_CONTENT_TYPES):
|
|
pecan_state['content_type'] = cfg.get(
|
|
'content_type',
|
|
'text/html'
|
|
)
|
|
else:
|
|
best_default = acceptparse.MIMEAccept(
|
|
accept
|
|
).best_match(
|
|
content_types.keys()
|
|
)
|
|
|
|
if best_default is None:
|
|
msg = "Controller '%s' defined does not support " + \
|
|
"content_type '%s'. Supported type(s): %s"
|
|
logger.error(
|
|
msg % (
|
|
controller.__name__,
|
|
pecan_state['content_type'],
|
|
content_types.keys()
|
|
)
|
|
)
|
|
raise exc.HTTPNotAcceptable()
|
|
|
|
pecan_state['content_type'] = best_default
|
|
elif cfg.get('content_type') is not None and \
|
|
pecan_state['content_type'] not in content_types:
|
|
|
|
msg = "Controller '%s' defined does not support content_type " + \
|
|
"'%s'. Supported type(s): %s"
|
|
logger.error(
|
|
msg % (
|
|
controller.__name__,
|
|
pecan_state['content_type'],
|
|
content_types.keys()
|
|
)
|
|
)
|
|
raise exc.HTTPNotFound
|
|
|
|
# fetch any parameters
|
|
if req.method == 'GET':
|
|
params = req.GET
|
|
elif req.content_type in ('application/json',
|
|
'application/javascript'):
|
|
try:
|
|
if not isinstance(req.json, dict):
|
|
raise TypeError('%s is not a dict' % req.json)
|
|
params = NestedMultiDict(req.GET, req.json)
|
|
except (TypeError, ValueError):
|
|
params = req.params
|
|
else:
|
|
params = req.params
|
|
|
|
# fetch the arguments for the controller
|
|
args, varargs, kwargs = self.get_args(
|
|
state,
|
|
params.mixed(),
|
|
remainder,
|
|
cfg['argspec'],
|
|
im_self
|
|
)
|
|
state.arguments = Arguments(args, varargs, kwargs)
|
|
|
|
# handle "before" hooks
|
|
self.handle_hooks(self.determine_hooks(controller), 'before', state)
|
|
|
|
return controller, args+varargs, kwargs
|
|
|
|
def invoke_controller(self, controller, args, kwargs, state):
|
|
'''
|
|
The main request handler for Pecan applications.
|
|
'''
|
|
cfg = _cfg(controller)
|
|
content_types = cfg.get('content_types', {})
|
|
req = state.request
|
|
resp = state.response
|
|
pecan_state = req.pecan
|
|
|
|
# If a keyword is supplied via HTTP GET or POST arguments, but the
|
|
# function signature does not allow it, just drop it (rather than
|
|
# generating a TypeError).
|
|
argspec = getargspec(controller)
|
|
keys = kwargs.keys()
|
|
for key in keys:
|
|
if key not in argspec.args and not argspec.keywords:
|
|
kwargs.pop(key)
|
|
|
|
# get the result from the controller
|
|
result = controller(*args, **kwargs)
|
|
|
|
# a controller can return the response object which means they've taken
|
|
# care of filling it out
|
|
if result is response:
|
|
return
|
|
elif isinstance(result, WebObResponse):
|
|
state.response = result
|
|
return
|
|
|
|
raw_namespace = result
|
|
|
|
# pull the template out based upon content type and handle overrides
|
|
template = content_types.get(pecan_state['content_type'])
|
|
|
|
# check if for controller override of template
|
|
template = pecan_state.get('override_template', template) or (
|
|
'json' if self.default_renderer == 'json' else None
|
|
)
|
|
pecan_state['content_type'] = pecan_state.get(
|
|
'override_content_type',
|
|
pecan_state['content_type']
|
|
)
|
|
|
|
# if there is a template, render it
|
|
if template:
|
|
if template == 'json':
|
|
pecan_state['content_type'] = 'application/json'
|
|
result = self.render(template, result)
|
|
|
|
# If we are in a test request put the namespace where it can be
|
|
# accessed directly
|
|
if req.environ.get('paste.testing'):
|
|
testing_variables = req.environ['paste.testing_variables']
|
|
testing_variables['namespace'] = raw_namespace
|
|
testing_variables['template_name'] = template
|
|
testing_variables['controller_output'] = result
|
|
|
|
# set the body content
|
|
if result and isinstance(result, six.text_type):
|
|
resp.text = result
|
|
elif result:
|
|
resp.body = result
|
|
|
|
if pecan_state['content_type']:
|
|
# set the content type
|
|
resp.content_type = pecan_state['content_type']
|
|
|
|
def _handle_empty_response_body(self, state):
|
|
# Enforce HTTP 204 for responses which contain no body
|
|
if state.response.status_int == 200:
|
|
# If the response is a generator...
|
|
if isinstance(state.response.app_iter, types.GeneratorType):
|
|
# Split the generator into two so we can peek at one of them
|
|
# and determine if there is any response body content
|
|
a, b = tee(state.response.app_iter)
|
|
try:
|
|
next(a)
|
|
except StopIteration:
|
|
# If we hit StopIteration, the body is empty
|
|
state.response.status = 204
|
|
finally:
|
|
state.response.app_iter = b
|
|
else:
|
|
text = None
|
|
if state.response.charset:
|
|
# `response.text` cannot be accessed without a valid
|
|
# charset (because we don't know which encoding to use)
|
|
try:
|
|
text = state.response.text
|
|
except UnicodeDecodeError:
|
|
# If a valid charset is not specified, don't bother
|
|
# trying to guess it (because there's obviously
|
|
# content, so we know this shouldn't be a 204)
|
|
pass
|
|
if not any((state.response.body, text)):
|
|
state.response.status = 204
|
|
|
|
if state.response.status_int in (204, 304):
|
|
state.response.content_type = None
|
|
|
|
def __call__(self, environ, start_response):
|
|
'''
|
|
Implements the WSGI specification for Pecan applications, utilizing
|
|
``WebOb``.
|
|
'''
|
|
|
|
# create the request and response object
|
|
req = self.request_cls(environ)
|
|
resp = self.response_cls()
|
|
state = RoutingState(req, resp, self)
|
|
controller = None
|
|
|
|
# handle the request
|
|
try:
|
|
# add context and environment to the request
|
|
req.context = environ.get('pecan.recursive.context', {})
|
|
req.pecan = dict(content_type=None)
|
|
|
|
controller, args, kwargs = self.find_controller(state)
|
|
self.invoke_controller(controller, args, kwargs, state)
|
|
except Exception as e:
|
|
# if this is an HTTP Exception, set it as the response
|
|
if isinstance(e, exc.HTTPException):
|
|
# if the client asked for JSON, do our best to provide it
|
|
best_match = acceptparse.MIMEAccept(
|
|
getattr(req.accept, 'header_value', '*/*')
|
|
).best_match(('text/plain', 'text/html', 'application/json'))
|
|
state.response = e
|
|
if best_match == 'application/json':
|
|
json_body = dumps({
|
|
'code': e.status_int,
|
|
'title': e.title,
|
|
'description': e.detail
|
|
})
|
|
if isinstance(json_body, six.text_type):
|
|
e.text = json_body
|
|
else:
|
|
e.body = json_body
|
|
state.response.content_type = best_match
|
|
environ['pecan.original_exception'] = e
|
|
|
|
# if this is not an internal redirect, run error hooks
|
|
on_error_result = None
|
|
if not isinstance(e, ForwardRequestException):
|
|
on_error_result = self.handle_hooks(
|
|
self.determine_hooks(state.controller),
|
|
'on_error',
|
|
state,
|
|
e
|
|
)
|
|
|
|
# if the on_error handler returned a Response, use it.
|
|
if isinstance(on_error_result, WebObResponse):
|
|
state.response = on_error_result
|
|
else:
|
|
if not isinstance(e, exc.HTTPException):
|
|
raise
|
|
|
|
# if this is an HTTP 405, attempt to specify an Allow header
|
|
if isinstance(e, exc.HTTPMethodNotAllowed) and controller:
|
|
allowed_methods = _cfg(controller).get('allowed_methods', [])
|
|
if allowed_methods:
|
|
state.response.allow = sorted(allowed_methods)
|
|
finally:
|
|
# handle "after" hooks
|
|
self.handle_hooks(
|
|
self.determine_hooks(state.controller), 'after', state
|
|
)
|
|
|
|
self._handle_empty_response_body(state)
|
|
|
|
# get the response
|
|
return state.response(environ, start_response)
|
|
|
|
|
|
class ExplicitPecan(PecanBase):
|
|
|
|
def get_args(self, state, all_params, remainder, argspec, im_self):
|
|
# When comparing the argspec of the method to GET/POST params,
|
|
# ignore the implicit (req, resp) at the beginning of the function
|
|
# signature
|
|
if hasattr(state.controller, '__self__'):
|
|
_repr = '.'.join((
|
|
state.controller.__self__.__class__.__module__,
|
|
state.controller.__self__.__class__.__name__,
|
|
state.controller.__name__
|
|
))
|
|
else:
|
|
_repr = '.'.join((
|
|
state.controller.__module__,
|
|
state.controller.__name__
|
|
))
|
|
|
|
signature_error = TypeError(
|
|
'When `use_context_locals` is `False`, pecan passes an explicit '
|
|
'reference to the request and response as the first two arguments '
|
|
'to the controller.\nChange the `%s` signature to accept exactly '
|
|
'2 initial arguments (req, resp)' % _repr
|
|
)
|
|
try:
|
|
positional = argspec.args[:]
|
|
positional.pop(1) # req
|
|
positional.pop(1) # resp
|
|
argspec = argspec._replace(args=positional)
|
|
except IndexError:
|
|
raise signature_error
|
|
|
|
args, varargs, kwargs = super(ExplicitPecan, self).get_args(
|
|
state, all_params, remainder, argspec, im_self
|
|
)
|
|
|
|
if ismethod(state.controller):
|
|
args = [state.request, state.response] + args
|
|
else:
|
|
# generic controllers have an explicit self *first*
|
|
# (because they're decorated functions, not instance methods)
|
|
args[1:1] = [state.request, state.response]
|
|
return args, varargs, kwargs
|
|
|
|
|
|
class Pecan(PecanBase):
|
|
'''
|
|
Pecan application object. Generally created using ``pecan.make_app``,
|
|
rather than being created manually.
|
|
|
|
Creates a Pecan application instance, which is a WSGI application.
|
|
|
|
:param root: A string representing a root controller object (e.g.,
|
|
"myapp.controller.root.RootController")
|
|
:param default_renderer: The default template rendering engine to use.
|
|
Defaults to mako.
|
|
:param template_path: A relative file system path (from the project root)
|
|
where template files live. Defaults to 'templates'.
|
|
:param hooks: A callable which returns a list of
|
|
:class:`pecan.hooks.PecanHook`
|
|
:param custom_renderers: Custom renderer objects, as a dictionary keyed
|
|
by engine name.
|
|
:param extra_template_vars: Any variables to inject into the template
|
|
namespace automatically.
|
|
:param force_canonical: A boolean indicating if this project should
|
|
require canonical URLs.
|
|
:param guess_content_type_from_ext: A boolean indicating if this project
|
|
should use the extension in the URL for guessing
|
|
the content type to return.
|
|
:param use_context_locals: When `True`, `pecan.request` and
|
|
`pecan.response` will be available as
|
|
thread-local references.
|
|
:param request_cls: Can be used to specify a custom `pecan.request` object.
|
|
Defaults to `pecan.Request`.
|
|
:param response_cls: Can be used to specify a custom `pecan.response`
|
|
object. Defaults to `pecan.Response`.
|
|
'''
|
|
|
|
def __new__(cls, *args, **kw):
|
|
if kw.get('use_context_locals') is False:
|
|
self = super(Pecan, cls).__new__(ExplicitPecan, *args, **kw)
|
|
self.__init__(*args, **kw)
|
|
return self
|
|
return super(Pecan, cls).__new__(cls)
|
|
|
|
def __init__(self, *args, **kw):
|
|
self.init_context_local(kw.get('context_local_factory'))
|
|
super(Pecan, self).__init__(*args, **kw)
|
|
|
|
def __call__(self, environ, start_response):
|
|
try:
|
|
state.hooks = []
|
|
state.app = self
|
|
state.controller = None
|
|
state.arguments = None
|
|
return super(Pecan, self).__call__(environ, start_response)
|
|
finally:
|
|
del state.hooks
|
|
del state.request
|
|
del state.response
|
|
del state.controller
|
|
del state.arguments
|
|
del state.app
|
|
|
|
def init_context_local(self, local_factory):
|
|
global state
|
|
if local_factory is None:
|
|
from threading import local as local_factory
|
|
state = local_factory()
|
|
|
|
def find_controller(self, _state):
|
|
state.request = _state.request
|
|
state.response = _state.response
|
|
controller, args, kw = super(Pecan, self).find_controller(_state)
|
|
state.controller = controller
|
|
state.arguments = _state.arguments
|
|
return controller, args, kw
|
|
|
|
def handle_hooks(self, hooks, *args, **kw):
|
|
state.hooks = hooks
|
|
return super(Pecan, self).handle_hooks(hooks, *args, **kw)
|