def preload_state(state: Dict[str, Any], routes: routing.RoutesConfig) -> None:
components = get_preloaded_components(routes)
for component in components:
builder = getattr(component, 'build')
pipeline = pipelines.build_pipeline(function=builder,
initial_types=[App])
pipelines.run_pipeline(pipeline, state)
def __init__(self, routes: List[Route]):
required_type = wsgi.WSGIResponse
initial_types = [wsgi.WSGIEnviron, URLPathArgs]
rules = []
views = {}
for (path, method, view) in routes:
view_signature = inspect.signature(view)
uritemplate = URITemplate(path)
# Ensure view arguments include all URL arguments
for arg in uritemplate.variable_names:
assert arg in view_signature.parameters, (
'URL argument "%s" in path "%s" must be included as a '
'keyword argument in the view function "%s"' %
(arg, path, view.__name__))
# Create a werkzeug path string
werkzeug_path = path[:]
for arg in uritemplate.variable_names:
param = view_signature.parameters[arg]
if param.annotation == inspect.Signature.empty:
annotated_type = str
else:
annotated_type = param.annotation
converter = self.converters[annotated_type]
werkzeug_path = werkzeug_path.replace(
'{%s}' % arg, '<%s:%s>' % (converter, arg))
# Create a werkzeug routing rule
name = view.__name__
rule = Rule(werkzeug_path, methods=[method], endpoint=name)
rules.append(rule)
# Determine any inferred type annotations for the view
extra_annotations = {}
for param in view_signature.parameters.values():
if param.annotation == inspect.Signature.empty:
annotated_type = str
else:
annotated_type = param.annotation
if param.name in uritemplate.variable_names:
class TypedURLPathArg(URLPathArg):
schema = annotated_type
extra_annotations[param.name] = TypedURLPathArg
elif (annotated_type in primitive_types) or issubclass(
annotated_type, schema_types):
class TypedQueryParam(http.QueryParam):
schema = annotated_type
extra_annotations[param.name] = TypedQueryParam
if 'return' not in view.__annotations__:
extra_annotations['return'] = http.ResponseData
# Determine the pipeline for the view.
pipeline = pipelines.build_pipeline(view, initial_types,
required_type,
extra_annotations)
views[name] = Endpoint(view, pipeline)
# Add pipelines for 404 and 405 cases.
pipeline = pipelines.build_pipeline(view_404, initial_types,
required_type, {})
self.not_found = (None, pipeline, {})
pipeline = pipelines.build_pipeline(view_405, initial_types,
required_type, {})
self.method_not_allowed = (None, pipeline, {})
self.routes = routes
self.adapter = Map(rules).bind('example.com')
self.views = views
def __init__(self,
routes: RoutesConfig,
initial_types: List[type] = None) -> None:
required_type = wsgi.WSGIResponse
initial_types = initial_types or []
initial_types += [wsgi.WSGIEnviron, URLPathArgs, Exception]
rules = []
views = {}
for (path, method, view) in walk(routes):
view_signature = inspect.signature(view)
uritemplate = URITemplate(path)
# Ensure view arguments include all URL arguments
for arg in uritemplate.variable_names:
assert arg in view_signature.parameters, (
'URL argument "%s" in path "%s" must be included as a '
'keyword argument in the view function "%s"' %
(arg, path, view.__name__))
# Create a werkzeug path string
werkzeug_path = path[:]
for arg in uritemplate.variable_names:
param = view_signature.parameters[arg]
if param.annotation is inspect.Signature.empty:
converter = 'string'
elif issubclass(param.annotation, (schema.String, str)):
if getattr(param.annotation, 'format', None) == 'path':
converter = 'path'
else:
converter = 'string'
elif issubclass(param.annotation, (schema.Number, float)):
converter = 'float'
elif issubclass(param.annotation, (schema.Integer, int)):
converter = 'int'
else:
msg = 'Invalid type for path parameter, %s.' % param.annotation
raise exceptions.ConfigurationError(msg)
werkzeug_path = werkzeug_path.replace(
'{%s}' % arg, '<%s:%s>' % (converter, arg))
# Create a werkzeug routing rule
name = view.__name__
rule = Rule(werkzeug_path, methods=[method], endpoint=name)
rules.append(rule)
# Determine any inferred type annotations for the view
extra_annotations = {} # type: Dict[str, type]
for param in view_signature.parameters.values():
if param.annotation is inspect.Signature.empty:
annotated_type = str
else:
annotated_type = param.annotation
if param.name in uritemplate.variable_names:
class TypedURLPathArg(URLPathArg):
schema = annotated_type
extra_annotations[param.name] = TypedURLPathArg
elif (annotated_type in primitive_types) or issubclass(
annotated_type, schema_types):
if method in ('POST', 'PUT', 'PATCH'):
if issubclass(annotated_type, schema.Object):
class TypedDataParam(http.RequestData):
schema = annotated_type
extra_annotations[param.name] = TypedDataParam
else:
class TypedFieldParam(http.RequestField):
schema = annotated_type
extra_annotations[param.name] = TypedFieldParam
else:
class TypedQueryParam(http.QueryParam):
schema = annotated_type
extra_annotations[param.name] = TypedQueryParam
return_annotation = view_signature.return_annotation
if return_annotation is inspect.Signature.empty:
extra_annotations['return'] = http.ResponseData
elif issubclass(
return_annotation,
(schema_types, primitive_types, typing_types)): # type: ignore
extra_annotations['return'] = http.ResponseData
# Determine the pipeline for the view.
pipeline = pipelines.build_pipeline(view, initial_types,
required_type,
extra_annotations)
views[name] = Endpoint(view, pipeline)
self.exception_pipeline = pipelines.build_pipeline(
exception_handler, initial_types, required_type, {})
self.routes = routes
self.adapter = Map(rules).bind('example.com')
self.views = views