Langgraph with FastAPI implementation #26
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feat: environment var config and settings
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Pull Request Overview
This PR introduces a complete "Gemini Blog Agent" implementation that replaces the existing simple web scraper with a sophisticated AI-powered blog generation service. The system uses FastAPI, LangGraph workflow orchestration, and Google Gemini for creating SEO-optimized blog content through an iterative improvement process.
Key changes include:
- Complete replacement of the basic scraper with a multi-agent AI system
- Implementation of FastAPI backend with async processing capabilities
- Integration of LangGraph for workflow orchestration and state management
- Addition of comprehensive testing, documentation, and deployment configurations
Reviewed Changes
Copilot reviewed 50 out of 58 changed files in this pull request and generated 7 comments.
| File | Description |
|---|---|
| src/main.py | Removed original simple scraper implementation |
| docs/gemini_implementation/ | Added comprehensive technical documentation and API specs |
| agent_system/ | New complete project structure with FastAPI backend, LangGraph agents, and supporting infrastructure |
Comments suppressed due to low confidence (1)
agent_system/src/agents/nodes/evaluate_seo.py:1
- Large commented-out code blocks (lines 1-322) should be removed from production code. If this is legacy code that needs to be preserved, move it to a separate file or version control history.
# """SEO evaluation node implementation."""
| def add_timestamp(logger: Any, method_name: str, event_dict: Dict[str, Any]) -> Dict[str, Any]: | ||
| """Add timestamp to log events.""" | ||
| # Fix: Use timezone-aware datetime instead of deprecated utcnow() | ||
| event_dict["timestamp"] = datetime.now(timezone.utc).isoformat() |
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Consider using a consistent timestamp format across the application. The current implementation uses ISO format, but other parts of the codebase use hardcoded timestamps like '2025-07-19T20:32:49Z'. Standardize on either dynamic timestamps or use a consistent format function.
| def add_timestamp(logger: Any, method_name: str, event_dict: Dict[str, Any]) -> Dict[str, Any]: | |
| """Add timestamp to log events.""" | |
| # Fix: Use timezone-aware datetime instead of deprecated utcnow() | |
| event_dict["timestamp"] = datetime.now(timezone.utc).isoformat() | |
| def get_current_timestamp() -> str: | |
| """Get the current timestamp in ISO 8601 format with UTC timezone.""" | |
| return datetime.now(timezone.utc).isoformat() | |
| def add_timestamp(logger: Any, method_name: str, event_dict: Dict[str, Any]) -> Dict[str, Any]: | |
| """Add timestamp to log events.""" | |
| event_dict["timestamp"] = get_current_timestamp() |
| # requirements.txt | ||
| # google-custom-search[async]>=3.0.0 | ||
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| import os, asyncio |
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Avoid comma-separated imports on the same line. Each import should be on its own line for better readability and maintainability.
| import os, asyncio | |
| import os | |
| import asyncio |
| async def generate_content( | ||
| self, | ||
| prompt: str, | ||
| use_search: bool = False, # kept for compatibility, but ignored |
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The use_search parameter is marked as ignored but still present in the interface. Consider removing unused parameters or implementing the functionality to avoid confusion.
| use_search: bool = False, # kept for compatibility, but ignored | |
| use_search: bool = False, # deprecated and ignored |
| content={ | ||
| "detail": detail, | ||
| "type": "internal_server_error", | ||
| "timestamp": "2025-07-19T20:32:49Z" |
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Hardcoded timestamp should be replaced with dynamic timestamp generation to provide accurate error timing information.
| "timestamp": "2025-07-19T20:32:49Z" | |
| "timestamp": datetime.utcnow().isoformat() + "Z" |
| # Fix: Set trusted hosts to allow testserver | ||
| monkeypatch.setenv("TRUSTED_HOSTS", "testserver,localhost,127.0.0.1") No newline at end of file |
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[nitpick] Setting TRUSTED_HOSTS to include 'testserver' in test configuration could mask potential security issues. Consider using more restrictive host validation even in tests.
| # Fix: Set trusted hosts to allow testserver | |
| monkeypatch.setenv("TRUSTED_HOSTS", "testserver,localhost,127.0.0.1") | |
| # Restrict trusted hosts to localhost and 127.0.0.1 | |
| monkeypatch.setenv("TRUSTED_HOSTS", "localhost,127.0.0.1") |
| # Debug print | ||
| print(f"Config loaded - google api key set: {bool(GOOGLE_API_KEY)}, ") No newline at end of file |
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Debug print statement could potentially expose sensitive configuration information in logs. Consider using proper logging with appropriate log levels instead of print statements.
| # Debug print | |
| print(f"Config loaded - google api key set: {bool(GOOGLE_API_KEY)}, ") | |
| # Debug logging | |
| logging.debug(f"Config loaded - google api key set: {bool(GOOGLE_API_KEY)}, ") |
Pull Request Description
What does this PR do?
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Related Issue(s)
This pull request introduces a new project, the "Gemini Blog Agent," which is a self-optimizing blog generation service using AI and SEO optimization. It includes the foundational setup for the project, such as environment configuration, dependencies, Docker integration, and documentation. Below is a summary of the most important changes:
Project Setup and Configuration
.env.examplefile inagent_systemwith variables for API keys, model configuration, and operational parameters. Removed outdated variables from the root.env.example. [1] [2]requirements.txtfile listing all project dependencies and apyproject.tomlfile for project metadata and build configuration. [1] [2]Codebase and Application Structure
__init__.pyfiles with docstrings. [1] [2]run.pyscript to launch the development server with configurable settings, usinguvicornanduvloopfor performance.Docker and Deployment
docker-compose.ymlfile for running the application and optional Redis service with health checks and environment variable support.Documentation
README.mdfile describing the project features, architecture, tech stack, setup instructions, usage, testing, and deployment guidelines.Git and Ignored Files
.gitignorefile tailored for Python projects, ignoring common files and directories like virtual environments, build artifacts, and IDE settings.Type of Change
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Testing
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