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Mini Shell
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import abc
import os # noqa
from typing import (
TYPE_CHECKING,
Any,
Awaitable,
Callable,
Dict,
Iterator,
List,
Optional,
Sequence,
Type,
Union,
overload,
)
import attr
from . import hdrs
from .abc import AbstractView
from .typedefs import PathLike
if TYPE_CHECKING: # pragma: no cover
from .web_request import Request
from .web_response import StreamResponse
from .web_urldispatcher import AbstractRoute, UrlDispatcher
else:
Request = StreamResponse = UrlDispatcher = AbstractRoute = None
__all__ = (
"AbstractRouteDef",
"RouteDef",
"StaticDef",
"RouteTableDef",
"head",
"options",
"get",
"post",
"patch",
"put",
"delete",
"route",
"view",
"static",
)
class AbstractRouteDef(abc.ABC):
@abc.abstractmethod
def register(self, router: UrlDispatcher) -> List[AbstractRoute]:
pass # pragma: no cover
_SimpleHandler = Callable[[Request], Awaitable[StreamResponse]]
_HandlerType = Union[Type[AbstractView], _SimpleHandler]
@attr.s(auto_attribs=True, frozen=True, repr=False, slots=True)
class RouteDef(AbstractRouteDef):
method: str
path: str
handler: _HandlerType
kwargs: Dict[str, Any]
def __repr__(self) -> str:
info = []
for name, value in sorted(self.kwargs.items()):
info.append(f", {name}={value!r}")
return "<RouteDef {method} {path} -> {handler.__name__!r}" "{info}>".format(
method=self.method, path=self.path, handler=self.handler, info="".join(info)
)
def register(self, router: UrlDispatcher) -> List[AbstractRoute]:
if self.method in hdrs.METH_ALL:
reg = getattr(router, "add_" + self.method.lower())
return [reg(self.path, self.handler, **self.kwargs)]
else:
return [
router.add_route(self.method, self.path, self.handler, **self.kwargs)
]
@attr.s(auto_attribs=True, frozen=True, repr=False, slots=True)
class StaticDef(AbstractRouteDef):
prefix: str
path: PathLike
kwargs: Dict[str, Any]
def __repr__(self) -> str:
info = []
for name, value in sorted(self.kwargs.items()):
info.append(f", {name}={value!r}")
return "<StaticDef {prefix} -> {path}" "{info}>".format(
prefix=self.prefix, path=self.path, info="".join(info)
)
def register(self, router: UrlDispatcher) -> List[AbstractRoute]:
resource = router.add_static(self.prefix, self.path, **self.kwargs)
routes = resource.get_info().get("routes", {})
return list(routes.values())
def route(method: str, path: str, handler: _HandlerType, **kwargs: Any) -> RouteDef:
return RouteDef(method, path, handler, kwargs)
def head(path: str, handler: _HandlerType, **kwargs: Any) -> RouteDef:
return route(hdrs.METH_HEAD, path, handler, **kwargs)
def options(path: str, handler: _HandlerType, **kwargs: Any) -> RouteDef:
return route(hdrs.METH_OPTIONS, path, handler, **kwargs)
def get(
path: str,
handler: _HandlerType,
*,
name: Optional[str] = None,
allow_head: bool = True,
**kwargs: Any,
) -> RouteDef:
return route(
hdrs.METH_GET, path, handler, name=name, allow_head=allow_head, **kwargs
)
def post(path: str, handler: _HandlerType, **kwargs: Any) -> RouteDef:
return route(hdrs.METH_POST, path, handler, **kwargs)
def put(path: str, handler: _HandlerType, **kwargs: Any) -> RouteDef:
return route(hdrs.METH_PUT, path, handler, **kwargs)
def patch(path: str, handler: _HandlerType, **kwargs: Any) -> RouteDef:
return route(hdrs.METH_PATCH, path, handler, **kwargs)
def delete(path: str, handler: _HandlerType, **kwargs: Any) -> RouteDef:
return route(hdrs.METH_DELETE, path, handler, **kwargs)
def view(path: str, handler: Type[AbstractView], **kwargs: Any) -> RouteDef:
return route(hdrs.METH_ANY, path, handler, **kwargs)
def static(prefix: str, path: PathLike, **kwargs: Any) -> StaticDef:
return StaticDef(prefix, path, kwargs)
_Deco = Callable[[_HandlerType], _HandlerType]
class RouteTableDef(Sequence[AbstractRouteDef]):
"""Route definition table"""
def __init__(self) -> None:
self._items = [] # type: List[AbstractRouteDef]
def __repr__(self) -> str:
return "<RouteTableDef count={}>".format(len(self._items))
@overload
def __getitem__(self, index: int) -> AbstractRouteDef:
...
@overload
def __getitem__(self, index: slice) -> List[AbstractRouteDef]:
...
def __getitem__(self, index): # type: ignore
return self._items[index]
def __iter__(self) -> Iterator[AbstractRouteDef]:
return iter(self._items)
def __len__(self) -> int:
return len(self._items)
def __contains__(self, item: object) -> bool:
return item in self._items
def route(self, method: str, path: str, **kwargs: Any) -> _Deco:
def inner(handler: _HandlerType) -> _HandlerType:
self._items.append(RouteDef(method, path, handler, kwargs))
return handler
return inner
def head(self, path: str, **kwargs: Any) -> _Deco:
return self.route(hdrs.METH_HEAD, path, **kwargs)
def get(self, path: str, **kwargs: Any) -> _Deco:
return self.route(hdrs.METH_GET, path, **kwargs)
def post(self, path: str, **kwargs: Any) -> _Deco:
return self.route(hdrs.METH_POST, path, **kwargs)
def put(self, path: str, **kwargs: Any) -> _Deco:
return self.route(hdrs.METH_PUT, path, **kwargs)
def patch(self, path: str, **kwargs: Any) -> _Deco:
return self.route(hdrs.METH_PATCH, path, **kwargs)
def delete(self, path: str, **kwargs: Any) -> _Deco:
return self.route(hdrs.METH_DELETE, path, **kwargs)
def view(self, path: str, **kwargs: Any) -> _Deco:
return self.route(hdrs.METH_ANY, path, **kwargs)
def static(self, prefix: str, path: PathLike, **kwargs: Any) -> None:
self._items.append(StaticDef(prefix, path, kwargs))
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