Create basic request/response abstract models

src/turbosloth/__main__.py

@@ -2,34 +2,18 @@ from __future__ import annotations
 
 from turbosloth import SlothApp
 from turbosloth.exceptions import NotFoundException
-from turbosloth.types import Scope, Receive, Send
+from turbosloth.types import Scope, Receive, Send, BasicRequest, BasicResponse
 
 app = SlothApp()
 
 
 @app.get("/")
-async def index(scope: Scope, receive: Receive, send: Send):
-    body = b"Hello, ASGI Router!"
-    await send({
-        "type": "http.response.start",
-        "status": 200,
-        "headers": [(b"content-type", b"text/plain")],
-    })
-    await send({
-        "type": "http.response.body",
-        "body": body,
-    })
+async def index(req: BasicRequest) -> BasicResponse:
+    return BasicResponse(200, {}, b'Hello, ASGI Router!')
 
 
 @app.get("/user/")
-async def get_user(scope: Scope, receive: Receive, send: Send):
+async def get_user(req: BasicRequest) -> BasicResponse:
     text = f"User ID: ".encode("utf-8")
-    await send({
-        "type": "http.response.start",
-        "status": 200,
-        "headers": [(b"content-type", b"text/plain")],
-    })
-    await send({
-        "type": "http.response.body",
-        "body": text,
-    })
+
+    return BasicResponse(200, {}, b'Hello, User!')

src/turbosloth/app.py

@@ -1,8 +1,9 @@
+import json
 from typing import Optional, Callable, Awaitable, Protocol
 
 from .exceptions import HTTPException
 from .router import Router
-from .types import Scope, Receive, Send, MethodType, HandlerType
+from .types import Scope, Receive, Send, MethodType, HandlerType, BasicRequest, BasicResponse
 
 
 class ASGIApp(Protocol):
@@ -17,20 +18,27 @@ class HTTPApp(ASGIApp):
         method = scope['method']
         path = scope['path']
 
+        body = b''
+        while True:
+            event = await receive()
+            body += event.get('body', b'')
+            if not event.get('more_body', False):
+                break
+        scope['body'] = body
+
+        req = BasicRequest.from_scope(scope)
+
         try:
             handler = self.router.match(method, path)
-            await handler(scope, receive, send)
+            resp = await handler(req)
         except HTTPException as e:
-            await send({
-                'type': 'http.response.start',
-                'status': e.code,
-                'headers': [(b'content-type', b'text/plain')],
-            })
-            await send({
-                'type': 'http.response.body',
-                'body': str(e).encode(),
-            })
-            return
+            resp = BasicResponse(e.code, {'content-type': 'text/plain'}, str(e).encode())
+
+        await send(resp.into_start_message())
+        await send({
+            'type': 'http.response.body',
+            'body': resp.body,
+        })
 
 
 class WSApp(ASGIApp):

src/turbosloth/types.py

@@ -1,9 +1,15 @@
-from typing import Callable, Awaitable, Dict, Literal
+from __future__ import annotations
+
+import collections
+from dataclasses import dataclass
+from typing import Callable, Awaitable, Dict, Literal, Any, TypeVar
+
+import urllib.parse
 
 type Scope = Dict
 type Receive = Callable[[], Awaitable[Dict]]
 type Send = Callable[[Dict], Awaitable[None]]
-type HandlerType = Callable[[Scope, Receive, Send], Awaitable[None]]
+type HandlerType = Callable[[BasicRequest], Awaitable[BasicResponse]]
 
 type MethodType = (
         Literal['GET'] |
@@ -16,3 +22,47 @@ type MethodType = (
         Literal['CONNECT'] |
         Literal['OPTIONS'] |
         Literal['TRACE'])
+
+K = TypeVar('K')
+V = TypeVar('V')
+
+
+@dataclass
+class BasicRequest:
+    method: str
+    path: str
+    headers: dict[str, str]
+    query: dict[str, list[str]]
+    body: dict[str, Any]
+
+    @classmethod
+    def from_scope(cls, scope: Scope) -> BasicRequest:
+        path = scope['path']
+        method = scope['method']
+        headers = {}
+        for key, value in scope.get('headers', []):
+            headers[key.decode('latin1')] = value.decode('latin1')
+
+        query = urllib.parse.parse_qs(scope['query_string'].decode('latin1'))
+
+        body = scope['body']
+
+        return BasicRequest(method, path, headers, query, body)
+
+
+@dataclass
+class BasicResponse:
+    code: int
+    headers: dict[str, str]
+    body: bytes
+
+    def into_start_message(self) -> dict:
+        enc_headers = []
+        for k, v in self.headers.items():
+            enc_headers.append((k.encode('latin1'), v.encode('latin1')))
+
+        return {
+            'type': 'http.response.start',
+            'status': self.code,
+            'headers': enc_headers
+        }