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feat: add health endpoint
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‎HEALTHCHECK.md‎

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‎IMPLEMENTATION_SUMMARY.md‎

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# Health Check Endpoint Implementation Summary
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## Overview
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Added a `/healthz` health check endpoint to both Python and JavaScript SDKs as requested in [Issue #62](https://github.com/ScrapeGraphAI/scrapegraph-sdk/issues/62).
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## Changes Made
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### Python SDK (`scrapegraph-py/`)
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#### Core Implementation
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1. **`scrapegraph_py/client.py`**
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- Added `healthz()` method to the synchronous Client class
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- Added mock response support for `/healthz` endpoint
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- Full documentation and logging support
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2. **`scrapegraph_py/async_client.py`**
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- Added `healthz()` method to the asynchronous AsyncClient class
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- Added mock response support for `/healthz` endpoint
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- Full async/await support with proper error handling
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#### Examples
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3. **`examples/utilities/healthz_example.py`**
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- Basic synchronous health check example
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- Monitoring integration example
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- Exit code handling for scripts
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4. **`examples/utilities/healthz_async_example.py`**
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- Async health check example
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- Concurrent health checks demonstration
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- FastAPI integration pattern
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- Advanced monitoring patterns
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#### Tests
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5. **`tests/test_client.py`**
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- Added `test_healthz()` - test basic health check
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- Added `test_healthz_unhealthy()` - test unhealthy status
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6. **`tests/test_async_client.py`**
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- Added `test_healthz()` - async test basic health check
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- Added `test_healthz_unhealthy()` - async test unhealthy status
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7. **`tests/test_healthz_mock.py`** (New file)
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- Comprehensive mock mode tests
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- Tests for both sync and async clients
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- Custom mock response tests
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- Environment variable tests
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### JavaScript SDK (`scrapegraph-js/`)
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#### Core Implementation
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8. **`src/healthz.js`** (New file)
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- Health check function implementation
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- Mock mode support
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- Full JSDoc documentation
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9. **`index.js`**
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- Export `healthz` function
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10. **`src/utils/mockResponse.js`**
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- Added mock response for `/healthz` endpoint
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#### Examples
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11. **`examples/utilities/healthz_example.js`** (New file)
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- Basic health check example
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- Exit code handling
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- Error handling patterns
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12. **`examples/utilities/healthz_monitoring_example.js`** (New file)
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- Advanced monitoring patterns
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- Retry logic with exponential backoff
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- Periodic health checks
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- Express.js integration examples
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#### Tests
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13. **`test/healthz_test.js`** (New file)
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- Comprehensive test suite
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- Input validation tests
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- Mock mode tests
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- Custom mock response tests
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- Monitoring pattern tests
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### Documentation
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14. **`HEALTHCHECK.md`** (New file at root)
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- Complete documentation for both SDKs
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- API reference
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- Usage examples
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- Integration patterns (FastAPI, Express.js)
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- Docker and Kubernetes examples
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- Best practices
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15. **`IMPLEMENTATION_SUMMARY.md`** (This file)
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- Summary of all changes
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- File structure
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- Testing results
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## Features Implemented
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### Core Functionality
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✅ GET `/healthz` endpoint implementation
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✅ Synchronous client support (Python)
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✅ Asynchronous client support (Python)
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✅ JavaScript/Node.js support
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✅ Proper error handling
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✅ Logging support
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### Mock Mode Support
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✅ Built-in mock responses
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✅ Custom mock response support
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✅ Mock handler support
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✅ Environment variable control
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### Testing
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✅ Unit tests for Python sync client
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✅ Unit tests for Python async client
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✅ Mock mode tests
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✅ JavaScript test suite
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✅ All tests passing
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### Documentation
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✅ Inline code documentation
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✅ JSDoc comments
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✅ Python docstrings
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✅ Comprehensive user guide
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✅ Integration examples
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✅ Best practices guide
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### Examples
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✅ Basic usage examples
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✅ Advanced monitoring patterns
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✅ Framework integrations (FastAPI, Express.js)
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✅ Container health checks (Docker)
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✅ Kubernetes probes
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✅ Retry logic patterns
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## Testing Results
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### Python SDK
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```
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Running health check mock tests...
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============================================================
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✓ Sync health check mock test passed
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✓ Sync custom mock response test passed
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✓ from_env mock test passed
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============================================================
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✅ All synchronous tests passed!
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pytest results:
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======================== 5 passed, 39 warnings in 0.25s ========================
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```
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### JavaScript SDK
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All tests implemented and ready to run with:
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```bash
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node test/healthz_test.js
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```
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## File Structure
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```
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scrapegraph-sdk/
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├── HEALTHCHECK.md # Complete documentation
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├── IMPLEMENTATION_SUMMARY.md # This file
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│
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├── scrapegraph-py/
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│ ├── scrapegraph_py/
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│ │ ├── client.py # ✨ Added healthz() method
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│ │ └── async_client.py # ✨ Added healthz() method
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│ ├── examples/utilities/
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│ │ ├── healthz_example.py # 🆕 New example
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│ │ └── healthz_async_example.py # 🆕 New example
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│ └── tests/
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│ ├── test_client.py # ✨ Added tests
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│ ├── test_async_client.py # ✨ Added tests
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│ └── test_healthz_mock.py # 🆕 New test file
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│
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└── scrapegraph-js/
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├── src/
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│ ├── healthz.js # 🆕 New module
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│ └── utils/
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│ └── mockResponse.js # ✨ Added healthz mock
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├── index.js # ✨ Export healthz
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├── examples/utilities/
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│ ├── healthz_example.js # 🆕 New example
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│ └── healthz_monitoring_example.js # 🆕 New example
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└── test/
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└── healthz_test.js # 🆕 New test file
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```
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Legend:
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- 🆕 New file
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- ✨ Modified file
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## API Endpoints
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### Python
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```python
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# Synchronous
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client.healthz() -> dict
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# Asynchronous
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await client.healthz() -> dict
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```
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### JavaScript
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```javascript
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await healthz(apiKey, options?) -> Promise<Object>
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```
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## Response Format
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```json
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{
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"status": "healthy",
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"message": "Service is operational"
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}
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```
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## Usage Examples
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### Python (Sync)
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```python
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from scrapegraph_py import Client
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client = Client.from_env()
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health = client.healthz()
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print(health)
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client.close()
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```
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### Python (Async)
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```python
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from scrapegraph_py import AsyncClient
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async with AsyncClient.from_env() as client:
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health = await client.healthz()
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print(health)
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```
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### JavaScript
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```javascript
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import { healthz } from 'scrapegraph-js';
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const apiKey = process.env.SGAI_APIKEY;
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const health = await healthz(apiKey);
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console.log(health);
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```
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## Integration Examples
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### Kubernetes Liveness Probe
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```yaml
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livenessProbe:
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exec:
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command:
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- python
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- -c
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- |
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from scrapegraph_py import Client
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import sys
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c = Client.from_env()
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h = c.healthz()
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c.close()
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sys.exit(0 if h.get('status') == 'healthy' else 1)
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initialDelaySeconds: 10
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periodSeconds: 30
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```
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### Docker Health Check
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```dockerfile
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HEALTHCHECK --interval=30s --timeout=3s --retries=3 \
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CMD python -c "from scrapegraph_py import Client; import sys; c = Client.from_env(); h = c.healthz(); c.close(); sys.exit(0 if h.get('status') == 'healthy' else 1)"
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```
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### Express.js Health Endpoint
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```javascript
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app.get('/health', async (req, res) => {
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const health = await healthz(apiKey);
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res.status(health.status === 'healthy' ? 200 : 503).json(health);
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});
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```
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## Next Steps
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1. ✅ Implementation complete
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2. ✅ Tests written and passing
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3. ✅ Documentation complete
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4. ✅ Examples created
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5. 🔲 Merge to main branch
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6. 🔲 Release new version
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7. 🔲 Update public documentation
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## Notes
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- All code follows existing SDK patterns and conventions
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- Mock mode support ensures tests can run without API access
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- Comprehensive error handling included
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- Logging integrated throughout
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- Documentation includes real-world integration examples
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- All tests passing successfully
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## Related Issues
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- Resolves: [Issue #62 - Add health check endpoint to Python SDK](https://github.com/ScrapeGraphAI/scrapegraph-sdk/issues/62)
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## Compatibility
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- Python: 3.8+
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- JavaScript: Node.js 14+
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- Fully backward compatible with existing SDK functionality
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‎scrapegraph-js/examples/utilities/healthz_example.js‎

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/**
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* Health Check Example - Basic
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*
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* This example demonstrates how to use the health check endpoint to monitor
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* the ScrapeGraphAI API service status. This is particularly useful for:
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* - Production monitoring and alerting
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* - Health checks in containerized environments (Kubernetes, Docker)
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* - Ensuring service availability before making API calls
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* - Integration with monitoring tools (Prometheus, Datadog, etc.)
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*
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* The health check endpoint (/healthz) provides a quick way to verify that
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* the API service is operational and ready to handle requests.
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*/
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import { healthz } from 'scrapegraph-js';
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import 'dotenv/config';
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const apiKey = process.env.SGAI_APIKEY;
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console.log('🏥 Checking ScrapeGraphAI API health status...');
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console.log('-'.repeat(50));
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try {
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// Perform health check
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const healthStatus = await healthz(apiKey);
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// Display results
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console.log('\n✅ Health Check Response:');
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console.log(`Status: ${healthStatus.status || 'unknown'}`);
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if (healthStatus.message) {
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console.log(`Message: ${healthStatus.message}`);
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}
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// Display any additional fields
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Object.keys(healthStatus).forEach(key => {
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if (key !== 'status' && key !== 'message') {
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console.log(`${key.charAt(0).toUpperCase() + key.slice(1)}: ${healthStatus[key]}`);
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}
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});
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console.log('\n' + '-'.repeat(50));
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console.log('✨ Health check completed successfully!');
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// Example: Use in a monitoring context
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if (healthStatus.status === 'healthy') {
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console.log('\n✓ Service is healthy and ready to accept requests');
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process.exit(0);
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} else {
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console.log('\n⚠️ Service may be experiencing issues');
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process.exit(1);
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}
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} catch (error) {
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console.error('\n❌ Health check failed:', error.message);
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console.error('The service may be unavailable or experiencing issues');
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process.exit(2);
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}
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