Feature: improve request error structure

docs/usage/error-handling.md

@@ -7,11 +7,11 @@ GitHubException
 ├── AuthCredentialError
 ├── AuthExpiredError
 ├── RequestError
-├── RequestTimeout
-├── RequestFailed
-│   └── RateLimitExceeded
-│       ├── PrimaryRateLimitExceeded
-│       └── SecondaryRateLimitExceeded
+│   ├── RequestTimeout
+│   └── RequestFailed
+│       └── RateLimitExceeded
+│           ├── PrimaryRateLimitExceeded
+│           └── SecondaryRateLimitExceeded
 ├── GraphQLError
 │   ├── GraphQLFailed
 │   └── GraphQLPaginationError

githubkit/core.py

@@ -283,9 +283,9 @@
                     cookies=cookies,
                 )
             except httpx.TimeoutException as e:
-                raise RequestTimeout(e.request) from e
+                raise RequestTimeout(e) from e
             except Exception as e:
-                raise RequestError(repr(e)) from e
+                raise RequestError(e) from e
 
     # async request
     async def _arequest(
@@ -315,9 +315,9 @@
                     cookies=cookies,
                 )
             except httpx.TimeoutException as e:
-                raise RequestTimeout(e.request) from e
+                raise RequestTimeout(e) from e
             except Exception as e:
-                raise RequestError(repr(e)) from e
+                raise RequestError(e) from e
 
     # check and parse response
     @overload

githubkit/exception.py

@@ -1,5 +1,5 @@
 from datetime import timedelta
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Generic, TypeVar
 
 import httpx
 
@@ -8,6 +8,9 @@
     from .graphql import GraphQLResponse
 
 
+E = TypeVar("E", bound=Exception)
+
+
 class GitHubException(Exception): ...
 
 
@@ -19,15 +22,22 @@
     """Auth Expired Error"""
 
 
-class RequestError(GitHubException):
+class RequestError(GitHubException, Generic[E]):
     """Simple API request failed with unknown error"""
 
+    def __init__(self, exc: E) -> None:
+        self.exc = exc
+
+    def __repr__(self) -> str:
+        return f"{self.__class__.__name__}(origin_exc={self.exc!r})"
+
 
-class RequestTimeout(GitHubException):
+class RequestTimeout(RequestError[httpx.TimeoutException]):
     """Simple API request timeout"""
 
-    def __init__(self, request: httpx.Request):
-        self.request = request
+    @property
+    def request(self) -> httpx.Request:
+        return self.exc.request
 
     def __repr__(self) -> str:
         return (
@@ -36,10 +46,17 @@
         )
 
 
-class RequestFailed(GitHubException):
+class RequestFailed(RequestError[httpx.HTTPStatusError]):
     """Simple API request failed with error status code"""
 
     def __init__(self, response: "Response"):
+        super().__init__(
+            httpx.HTTPStatusError(
+                "Request failed",
+                request=response.raw_request,
+                response=response.raw_response,
+            )
+        )
         self.request = response.raw_request
         self.response = response