preimplemented helper class for endpoint

pype/modules/webserver/base_routes.py

@@ -0,0 +1,51 @@
+"""Helper functions or classes for Webserver module.
+
+These must not be imported in module itself to not break Python 2
+applications.
+"""
+
+import json
+import inspect
+from aiohttp.http_exceptions import HttpBadRequest
+from aiohttp.web_exceptions import HTTPMethodNotAllowed
+from aiohttp.web_request import Request
+
+
+DEFAULT_METHODS = ("GET", "POST", "PUT", "DELETE")
+
+
+class RestApiEndpoint:
+    """Helper endpoint class for single endpoint.
+
+    Class can define `get`, `post`, `put` or `delete` async methods for the
+    endpoint.
+    """
+    def __init__(self):
+        methods = {}
+
+        for method_name in DEFAULT_METHODS:
+            method = getattr(self, method_name.lower(), None)
+            if method:
+                methods[method_name.upper()] = method
+
+        self.methods = methods
+
+    async def dispatch(self, request: Request):
+        method = self.methods.get(request.method.upper())
+        if not method:
+            raise HTTPMethodNotAllowed("", DEFAULT_METHODS)
+
+        wanted_args = list(inspect.signature(method).parameters.keys())
+
+        available_args = request.match_info.copy()
+        available_args["request"] = request
+
+        unsatisfied_args = set(wanted_args) - set(available_args.keys())
+        if unsatisfied_args:
+            # Expected match info that doesn't exist
+            raise HttpBadRequest("")
+
+        return await method(**{
+            arg_name: available_args[arg_name]
+            for arg_name in wanted_args
+        })

pype/modules/webserver/webserver_module.py

@@ -1,5 +1,9 @@
 import os
 import socket
+from abc import ABCMeta, abstractmethod
+
+import six
+
 from pype import resources
 from .. import PypeModule, ITrayService