def invoke_rest_api(invocation_context: ApiInvocationContext):
invocation_path = invocation_context.path_with_query_string
raw_path = invocation_context.path or invocation_path
method = invocation_context.method
headers = invocation_context.headers
# run gateway authorizers for this request
authorize_invocation(invocation_context)
extracted_path, resource = get_target_resource_details(invocation_context)
if not resource:
return make_error_response(
"Unable to find path %s" % invocation_context.path, 404)
# validate request
validator = RequestValidator(invocation_context,
aws_stack.connect_to_service("apigateway"))
if not validator.is_request_valid():
return make_error_response("Invalid request body", 400)
api_key_required = resource.get("resourceMethods",
{}).get(method, {}).get("apiKeyRequired")
if not is_api_key_valid(api_key_required, headers,
invocation_context.stage):
return make_error_response("Access denied - invalid API key", 403)
integrations = resource.get("resourceMethods", {})
integration = integrations.get(method, {})
if not integration:
# HttpMethod: '*'
# ResourcePath: '/*' - produces 'X-AMAZON-APIGATEWAY-ANY-METHOD'
integration = integrations.get("ANY", {}) or integrations.get(
"X-AMAZON-APIGATEWAY-ANY-METHOD", {})
integration = integration.get("methodIntegration")
if not integration:
if method == "OPTIONS" and "Origin" in headers:
# default to returning CORS headers if this is an OPTIONS request
return get_cors_response(headers)
return make_error_response(
"Unable to find integration for: %s %s (%s)" %
(method, invocation_path, raw_path),
404,
)
res_methods = resource.get("resourceMethods", {})
meth_integration = res_methods.get(method, {}).get("methodIntegration", {})
int_responses = meth_integration.get("integrationResponses", {})
response_templates = int_responses.get("200",
{}).get("responseTemplates", {})
# update fields in invocation context, then forward request to next handler
invocation_context.resource = resource
invocation_context.resource_path = extracted_path
invocation_context.response_templates = response_templates
invocation_context.integration = integration
return invoke_rest_api_integration(invocation_context)
def get_target_resource_details(
invocation_context: ApiInvocationContext) -> Tuple[str, Dict]:
"""Look up and return the API GW resource (path pattern + resource dict) for the given invocation context."""
path_map = helpers.get_rest_api_paths(
rest_api_id=invocation_context.api_id,
region_name=invocation_context.region_name)
relative_path = invocation_context.invocation_path
try:
extracted_path, resource = get_resource_for_path(path=relative_path,
path_map=path_map)
invocation_context.resource = resource
return extracted_path, resource
except Exception:
return None, None