Module hug.directives
hug/directives.py
Defines the directives built into hug. Directives allow attaching behaviour to an API handler based simply on an argument it takes and that arguments default value. The directive gets called with the default supplied, ther request data, and api_version. The result of running the directive method is then set as the argument value. Directive attributes are always prefixed with 'hug_'
Copyright (C) 2016 Timothy Edmund Crosley
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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"""hug/directives.py Defines the directives built into hug. Directives allow attaching behaviour to an API handler based simply on an argument it takes and that arguments default value. The directive gets called with the default supplied, ther request data, and api_version. The result of running the directive method is then set as the argument value. Directive attributes are always prefixed with 'hug_' Copyright (C) 2016 Timothy Edmund Crosley Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. """ from __future__ import absolute_import from functools import partial from timeit import default_timer as python_timer from hug import introspect def _built_in_directive(directive): """Marks a callable as a built-in directive""" directive.directive = True return directive @_built_in_directive class Timer(object): """Keeps track of time surpased since instantiation, outputed by doing float(instance)""" __slots__ = ("start", "round_to") def __init__(self, round_to=None, **kwargs): self.start = python_timer() self.round_to = round_to def __float__(self): time_taken = python_timer() - self.start return round(time_taken, self.round_to) if self.round_to else time_taken def __int__(self): return int(round(float(self))) def __native_types__(self): return self.__float__() def __str__(self): return str(float(self)) def __repr__(self): return "{}({})".format(self.__class__.__name__, self) @_built_in_directive def module(default=None, api=None, **kwargs): """Returns the module that is running this hug API function""" return api.module if api else default @_built_in_directive def api(default=None, api=None, **kwargs): """Returns the api instance in which this API function is being ran""" return api if api else default @_built_in_directive def api_version(default=None, api_version=None, **kwargs): """Returns the current api_version as a directive for use in both request and not request handling code""" return api_version @_built_in_directive def documentation(default=None, api_version=None, api=None, **kwargs): """returns documentation for the current api""" api_version = default or api_version if api: return api.http.documentation(base_url="", api_version=api_version) @_built_in_directive def session(context_name="session", request=None, **kwargs): """Returns the session associated with the current request""" return request and request.context.get(context_name, None) @_built_in_directive def user(default=None, request=None, **kwargs): """Returns the current logged in user""" return request and request.context.get("user", None) or default @_built_in_directive def cors(support="*", response=None, **kwargs): """Adds the the Access-Control-Allow-Origin header to this endpoint, with the specified support""" response and response.set_header("Access-Control-Allow-Origin", support) return support @_built_in_directive class CurrentAPI(object): """Returns quick access to all api functions on the current version of the api""" __slots__ = ("api_version", "api") def __init__(self, default=None, api_version=None, **kwargs): self.api_version = api_version self.api = api(**kwargs) def __getattr__(self, name): function = self.api.http.versioned.get(self.api_version, {}).get(name, None) if not function: function = self.api.http.versioned.get(None, {}).get(name, None) if not function: raise AttributeError("API Function {0} not found".format(name)) accepts = function.interface.arguments if "hug_api_version" in accepts: function = partial(function, hug_api_version=self.api_version) if "hug_current_api" in accepts: function = partial(function, hug_current_api=self) return function
Functions
api
def api( default=None, api=None, **kwargs )
Returns the api instance in which this API function is being ran
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@_built_in_directive def api(default=None, api=None, **kwargs): """Returns the api instance in which this API function is being ran""" return api if api else default
api_version
def api_version( default=None, api_version=None, **kwargs )
Returns the current api_version as a directive for use in both request and not request handling code
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@_built_in_directive def api_version(default=None, api_version=None, **kwargs): """Returns the current api_version as a directive for use in both request and not request handling code""" return api_version
cors
def cors( support='*', response=None, **kwargs )
Adds the the Access-Control-Allow-Origin header to this endpoint, with the specified support
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@_built_in_directive def cors(support="*", response=None, **kwargs): """Adds the the Access-Control-Allow-Origin header to this endpoint, with the specified support""" response and response.set_header("Access-Control-Allow-Origin", support) return support
documentation
def documentation( default=None, api_version=None, api=None, **kwargs )
returns documentation for the current api
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@_built_in_directive def documentation(default=None, api_version=None, api=None, **kwargs): """returns documentation for the current api""" api_version = default or api_version if api: return api.http.documentation(base_url="", api_version=api_version)
module
def module( default=None, api=None, **kwargs )
Returns the module that is running this hug API function
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@_built_in_directive def module(default=None, api=None, **kwargs): """Returns the module that is running this hug API function""" return api.module if api else default
session
def session( context_name='session', request=None, **kwargs )
Returns the session associated with the current request
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@_built_in_directive def session(context_name="session", request=None, **kwargs): """Returns the session associated with the current request""" return request and request.context.get(context_name, None)
user
def user( default=None, request=None, **kwargs )
Returns the current logged in user
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@_built_in_directive def user(default=None, request=None, **kwargs): """Returns the current logged in user""" return request and request.context.get("user", None) or default
Classes
CurrentAPI
class CurrentAPI( default=None, api_version=None, **kwargs )
Returns quick access to all api functions on the current version of the api
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class CurrentAPI(object): """Returns quick access to all api functions on the current version of the api""" __slots__ = ("api_version", "api") def __init__(self, default=None, api_version=None, **kwargs): self.api_version = api_version self.api = api(**kwargs) def __getattr__(self, name): function = self.api.http.versioned.get(self.api_version, {}).get(name, None) if not function: function = self.api.http.versioned.get(None, {}).get(name, None) if not function: raise AttributeError("API Function {0} not found".format(name)) accepts = function.interface.arguments if "hug_api_version" in accepts: function = partial(function, hug_api_version=self.api_version) if "hug_current_api" in accepts: function = partial(function, hug_current_api=self) return function
Class variables
directive
Instance variables
api
api_version
Timer
class Timer( round_to=None, **kwargs )
Keeps track of time surpased since instantiation, outputed by doing float(instance)
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class Timer(object): """Keeps track of time surpased since instantiation, outputed by doing float(instance)""" __slots__ = ("start", "round_to") def __init__(self, round_to=None, **kwargs): self.start = python_timer() self.round_to = round_to def __float__(self): time_taken = python_timer() - self.start return round(time_taken, self.round_to) if self.round_to else time_taken def __int__(self): return int(round(float(self))) def __native_types__(self): return self.__float__() def __str__(self): return str(float(self)) def __repr__(self): return "{}({})".format(self.__class__.__name__, self)
Class variables
directive
Instance variables
round_to
start