How to use ForwardingFallbackDispatcher method in localstack

Best Python code snippet using localstack_python

moto.py

Source:moto.py Github

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...94 raises a ``NotImplementedError``.95 :param provider: the ASF provider96 :return: a modified DispatchTable97 """98 return ForwardingFallbackDispatcher(provider, proxy_moto)99def dispatch_to_moto(context: RequestContext) -> MotoResponse:100 """101 Internal method to dispatch the request to moto without changing moto's dispatcher output.102 :param context: the request context103 :return: the response from moto104 """105 service = context.service106 request = context.request107 # hack to avoid call to request.form (see moto's BaseResponse.dispatch)108 request.body = request.data109 # this is where we skip the HTTP roundtrip between the moto server and the boto client110 dispatch = get_dispatcher(service.service_name, request.path)111 return dispatch(request, request.url, request.headers)112def get_dispatcher(service: str, path: str) -> MotoDispatcher:...

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forwarder.py

Source:forwarder.py Github

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...20from localstack.http import Response21from localstack.http.proxy import forward22from localstack.utils.aws import aws_stack23from localstack.utils.strings import to_str24def ForwardingFallbackDispatcher(25 provider: object, request_forwarder: ServiceRequestHandler26) -> DispatchTable:27 """28 Wraps a provider with a request forwarder. It does by creating a new DispatchTable from the original29 provider, and wrapping each method with a fallthrough method that calls ``request_forwarder`` if the30 original provider raises a ``NotImplementedError``.31 :param provider: the ASF provider32 :param request_forwarder: callable that forwards the request (e.g., to a backend server)33 :return: a modified DispatchTable34 """35 table = create_dispatch_table(provider)36 for op, fn in table.items():37 table[op] = _wrap_with_fallthrough(fn, request_forwarder)38 return table39def _wrap_with_fallthrough(40 handler: ServiceRequestHandler, fallthrough_handler: ServiceRequestHandler41) -> ServiceRequestHandler:42 def _call(context, req) -> ServiceResponse:43 try:44 # handler will typically be an ASF provider method, and in case it hasn't been45 # implemented, we try to fall back to forwarding the request to the backend46 return handler(context, req)47 except NotImplementedError:48 pass49 return fallthrough_handler(context, req)50 return _call51def HttpFallbackDispatcher(provider: object, forward_url_getter: Callable[[], str]):52 return ForwardingFallbackDispatcher(provider, get_request_forwarder_http(forward_url_getter))53def get_request_forwarder_http(forward_url_getter: Callable[[], str]) -> ServiceRequestHandler:54 def _forward_request(context, service_request: ServiceRequest = None) -> ServiceResponse:55 if service_request is not None:56 local_context = create_aws_request_context(57 service_name=context.service.service_name,58 action=context.operation.name,59 parameters=service_request,60 region=context.region,61 )62 local_context.request.headers.update(context.request.headers)63 context = local_context64 return forward_request(context, forward_url_getter)65 return _forward_request66def forward_request(...

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