refactored google auth callback #101
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WalkthroughThe changes remove the Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant Frontend
participant Backend (GoogleCallbackView)
participant Google
User->>Google: Initiate OAuth login
Google->>Frontend: Redirect with code & state (GET)
Frontend->>Backend (GoogleCallbackView): POST /auth/google/callback/ with code & state
Backend (GoogleCallbackView)->>Google: Exchange code for tokens
Google-->>Backend (GoogleCallbackView): Return tokens/user info
Backend (GoogleCallbackView)->>Frontend: Respond with user info, tokens, set cookies
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Actionable comments posted: 3
📜 Review details
Configuration used: CodeRabbit UI
Review profile: ASSERTIVE
Plan: Pro
📒 Files selected for processing (4)
todo/tests/unit/views/test_auth.py(0 hunks)todo/urls.py(0 hunks)todo/views/auth.py(3 hunks)todo/views/task.py(1 hunks)
💤 Files with no reviewable changes (2)
- todo/urls.py
- todo/tests/unit/views/test_auth.py
🧰 Additional context used
🧠 Learnings (3)
📓 Common learnings
Learnt from: Achintya-Chatterjee
PR: Real-Dev-Squad/todo-backend#52
File: todo/views/task.py:106-106
Timestamp: 2025-05-29T21:36:27.694Z
Learning: Issue #26 in the Real-Dev-Squad/todo-backend repository comprehensively tracks user authentication implementation including registration, login, JWT tokens, and making task APIs require authentication. This covers replacing hardcoded user ID placeholders like "system_patch_user" with actual user ID extraction from authenticated requests.
Learnt from: Achintya-Chatterjee
PR: Real-Dev-Squad/todo-backend#52
File: todo/views/task.py:106-106
Timestamp: 2025-05-29T21:36:27.694Z
Learning: Issue #26 tracks the implementation of user authentication in the todo-backend project, which includes extracting user ID from request context to replace hardcoded placeholders like "system_patch_user" in todo/views/task.py.
todo/views/task.py (3)
Learnt from: Achintya-Chatterjee
PR: Real-Dev-Squad/todo-backend#52
File: todo/views/task.py:98-112
Timestamp: 2025-06-02T17:02:22.424Z
Learning: The todo-backend project uses a global exception handler that automatically handles TaskNotFoundException, BsonInvalidId, ValueError with ApiErrorResponse, and DRFValidationError. Views should avoid try-catch blocks and let exceptions bubble up to the global handler for consistent error formatting and status codes.
Learnt from: Achintya-Chatterjee
PR: Real-Dev-Squad/todo-backend#52
File: todo/views/task.py:106-106
Timestamp: 2025-05-29T21:36:27.694Z
Learning: Issue #26 tracks the implementation of user authentication in the todo-backend project, which includes extracting user ID from request context to replace hardcoded placeholders like "system_patch_user" in todo/views/task.py.
Learnt from: VaibhavSingh8
PR: Real-Dev-Squad/todo-backend#81
File: todo_project/settings/base.py:70-77
Timestamp: 2025-06-16T18:05:07.813Z
Learning: The todo-backend project uses a custom pagination configuration system with `DEFAULT_PAGINATION_SETTINGS` nested under `REST_FRAMEWORK` in Django settings. This is not a DRF setting but a custom implementation used by their `PaginationConfig` class in `task_service.py`, serializers, and throughout their codebase. The configuration includes `DEFAULT_PAGE_LIMIT` and `MAX_PAGE_LIMIT` values.
todo/views/auth.py (3)
Learnt from: Achintya-Chatterjee
PR: Real-Dev-Squad/todo-backend#52
File: todo/views/task.py:106-106
Timestamp: 2025-05-29T21:36:27.694Z
Learning: Issue #26 tracks the implementation of user authentication in the todo-backend project, which includes extracting user ID from request context to replace hardcoded placeholders like "system_patch_user" in todo/views/task.py.
Learnt from: Achintya-Chatterjee
PR: Real-Dev-Squad/todo-backend#52
File: todo/views/task.py:98-112
Timestamp: 2025-06-02T17:02:22.424Z
Learning: The todo-backend project uses a global exception handler that automatically handles TaskNotFoundException, BsonInvalidId, ValueError with ApiErrorResponse, and DRFValidationError. Views should avoid try-catch blocks and let exceptions bubble up to the global handler for consistent error formatting and status codes.
Learnt from: VaibhavSingh8
PR: Real-Dev-Squad/todo-backend#81
File: todo_project/settings/base.py:70-77
Timestamp: 2025-06-16T18:05:07.813Z
Learning: The todo-backend project uses a custom pagination configuration system with `DEFAULT_PAGINATION_SETTINGS` nested under `REST_FRAMEWORK` in Django settings. This is not a DRF setting but a custom implementation used by their `PaginationConfig` class in `task_service.py`, serializers, and throughout their codebase. The configuration includes `DEFAULT_PAGE_LIMIT` and `MAX_PAGE_LIMIT` values.
🪛 Pylint (3.3.7)
todo/views/task.py
[error] 8-8: Unable to import 'drf_spectacular.utils'
(E0401)
todo/views/auth.py
[error] 5-5: Unable to import 'django.http'
(E0401)
[error] 6-6: Unable to import 'django.conf'
(E0401)
[error] 7-7: Unable to import 'drf_spectacular.utils'
(E0401)
[refactor] 112-117: Unnecessary "elif" after "return", remove the leading "el" from "elif"
(R1705)
[convention] 130-130: Missing function or method docstring
(C0116)
[convention] 167-167: Line too long (102/100)
(C0301)
🔇 Additional comments (1)
todo/views/task.py (1)
8-8: Good cleanup of unused import.Removing the unused
OpenApiExampleimport improves code cleanliness.
| if error: | ||
| return HttpResponseRedirect(f"{frontend_callback}?error={error}") | ||
| elif code and state: | ||
| return HttpResponseRedirect(f"{frontend_callback}?code={code}&state={state}") | ||
| else: | ||
| return HttpResponseRedirect(f"{frontend_callback}?error=missing_parameters") |
There was a problem hiding this comment.
🧹 Nitpick (assertive)
Simplify conditional structure by removing unnecessary elif.
After a return statement, subsequent conditions don't need elif.
Apply this diff to improve code readability:
if error:
return HttpResponseRedirect(f"{frontend_callback}?error={error}")
-elif code and state:
+if code and state:
return HttpResponseRedirect(f"{frontend_callback}?code={code}&state={state}")
-else:
- return HttpResponseRedirect(f"{frontend_callback}?error=missing_parameters")
+return HttpResponseRedirect(f"{frontend_callback}?error=missing_parameters")📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| if error: | |
| return HttpResponseRedirect(f"{frontend_callback}?error={error}") | |
| elif code and state: | |
| return HttpResponseRedirect(f"{frontend_callback}?code={code}&state={state}") | |
| else: | |
| return HttpResponseRedirect(f"{frontend_callback}?error=missing_parameters") | |
| if error: | |
| return HttpResponseRedirect(f"{frontend_callback}?error={error}") | |
| if code and state: | |
| return HttpResponseRedirect(f"{frontend_callback}?code={code}&state={state}") | |
| return HttpResponseRedirect(f"{frontend_callback}?error=missing_parameters") |
🧰 Tools
🪛 Pylint (3.3.7)
[refactor] 112-117: Unnecessary "elif" after "return", remove the leading "el" from "elif"
(R1705)
🤖 Prompt for AI Agents
In todo/views/auth.py around lines 112 to 117, simplify the conditional
structure by replacing the `elif` with a simple `if` after the first `return`
statement, since the `return` already exits the function. This improves
readability by removing unnecessary `elif` and using separate `if` statements
for each condition.
| 500: OpenApiResponse(description="Internal server error"), | ||
| }, | ||
| ) | ||
| def post(self, request: Request): |
There was a problem hiding this comment.
🧹 Nitpick (assertive)
Add docstring to document the POST method.
The method lacks documentation explaining its purpose and parameters.
Add a docstring after the method definition:
def post(self, request: Request):
+ """
+ Process Google OAuth callback via POST request.
+
+ Validates authorization code and state, creates/updates user,
+ and returns authentication tokens in cookies.
+
+ Args:
+ request: HTTP request containing 'code' and 'state' in body
+
+ Returns:
+ Response with user data and token expiry information
+
+ Raises:
+ GoogleAuthException: If code is missing or state is invalid
+ GoogleAPIException: If OAuth processing fails
+ """
code = request.data.get("code")📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| def post(self, request: Request): | |
| def post(self, request: Request): | |
| """ | |
| Process Google OAuth callback via POST request. | |
| Validates authorization code and state, creates/updates user, | |
| and returns authentication tokens in cookies. | |
| Args: | |
| request: HTTP request containing 'code' and 'state' in body | |
| Returns: | |
| Response with user data and token expiry information | |
| Raises: | |
| GoogleAuthException: If code is missing or state is invalid | |
| GoogleAPIException: If OAuth processing fails | |
| """ | |
| code = request.data.get("code") | |
| ... |
🧰 Tools
🪛 Pylint (3.3.7)
[convention] 130-130: Missing function or method docstring
(C0116)
🤖 Prompt for AI Agents
In todo/views/auth.py at line 130, the post method lacks a docstring explaining
its purpose and parameters. Add a concise docstring immediately after the method
definition that describes what the POST method does and outlines its input
parameters, specifically the request argument.
![korbit-ai[bot]](https://avatars.githubusercontent.com/in/322216?s=60&v=4){kind=small}
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Review by Korbit AI
Korbit automatically attempts to detect when you fix issues in new commits.
| Category | Issue | Status |
|---|---|---|
 |
Inconsistent OAuth State Cleanup ▹ view | |
|
Unencoded Redirect Parameters ▹ view | |
|
Missing OAuth State Validation in GET Callback ▹ view |
Files scanned
| File Path | Reviewed |
|---|---|
| todo/urls.py | ✅ |
| todo/views/task.py | ✅ |
| todo/views/auth.py | ✅ |
Explore our documentation to understand the languages and file types we support and the files we ignore.
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| ) | ||
|
|
||
| self._set_auth_cookies(response, tokens) | ||
| request.session.pop("oauth_state", None) |
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Inconsistent OAuth State Cleanup 
Tell me more
What is the issue?
The oauth_state is only cleared in the POST handler but not in the GET handler, which could lead to the state being reused.
Why this matters
If the state isn't cleared after use in the GET handler, it remains in the session and could be reused in subsequent requests, potentially allowing replay attacks.
Suggested change ∙ Feature Preview
Add state cleanup in the GET handler after validation:
def get(self, request: Request):
# ... existing code ...
elif code and state:
if not stored_state or stored_state != state:
return HttpResponseRedirect(f"{frontend_callback}?error=invalid_state")
request.session.pop("oauth_state", None)
return HttpResponseRedirect(f"{frontend_callback}?code={code}&state={state}")Provide feedback to improve future suggestions
💬 Looking for more details? Reply to this comment to chat with Korbit.
There was a problem hiding this comment.
Could you please share the updated code that handles the OAuth state cleanup in the GET handler? This will help verify the security fix.
| def get(self, request: Request): | ||
| if "error" in request.query_params: | ||
| error = request.query_params.get("error") | ||
| raise GoogleAuthException(error) | ||
|
|
||
| code = request.query_params.get("code") | ||
| state = request.query_params.get("state") | ||
| error = request.query_params.get("error") | ||
|
|
||
| frontend_callback = f"{settings.FRONTEND_URL}/auth/callback" | ||
|
|
||
| if error: | ||
| return HttpResponseRedirect(f"{frontend_callback}?error={error}") | ||
| elif code and state: | ||
| return HttpResponseRedirect(f"{frontend_callback}?code={code}&state={state}") | ||
| else: | ||
| return HttpResponseRedirect(f"{frontend_callback}?error=missing_parameters") |
There was a problem hiding this comment.
Missing OAuth State Validation in GET Callback
Tell me more
What is the issue?
The GET callback handler doesn't validate the oauth_state from the session before redirecting to the frontend, which could lead to CSRF vulnerabilities.
Why this matters
An attacker could craft a malicious state parameter, bypass the state validation, and potentially execute a CSRF attack on the frontend callback endpoint.
Suggested change ∙ Feature Preview
Add state validation before redirecting:
def get(self, request: Request):
code = request.query_params.get("code")
state = request.query_params.get("state")
error = request.query_params.get("error")
stored_state = request.session.get("oauth_state")
frontend_callback = f"{settings.FRONTEND_URL}/auth/callback"
if error:
return HttpResponseRedirect(f"{frontend_callback}?error={error}")
elif code and state:
if not stored_state or stored_state != state:
return HttpResponseRedirect(f"{frontend_callback}?error=invalid_state")
return HttpResponseRedirect(f"{frontend_callback}?code={code}&state={state}")
else:
return HttpResponseRedirect(f"{frontend_callback}?error=missing_parameters")Provide feedback to improve future suggestions
💬 Looking for more details? Reply to this comment to chat with Korbit.
Date: 06-Jul-2025
Developer Name: @VaibhavSingh8
Issue Ticket Number
Description
Documentation Updated?
Under Feature Flag
Database Changes
Breaking Changes
Development Tested?
Screenshots
Screenshot 1
Test Coverage
Screenshot 1
Additional Notes
Description by Korbit AI
What change is being made?
Refactor the Google authentication callback process to use a POST method and redirect on errors, remove GoogleAuthStatusView, and replace
APISimpleTestCasewithAPITestCasein unit tests.Why are these changes being made?
The changes streamline the Google OAuth callback flow by simplifying the handling of authorization errors and missing parameters through URL redirection to the frontend. The use of
APITestCaseenhances test capabilities due to session support, allowing better testing of state and cookies, while removing unnecessary implementations (likeGoogleAuthStatusView) reduces code maintenance overhead.