mirror of
https://github.com/borbann-platform/backend-api.git
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81 lines
2.2 KiB
Python
81 lines
2.2 KiB
Python
"""
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API adapter to fetch JSON data from HTTP endpoints.
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"""
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from typing import List, Dict, Any, Optional
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import requests
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from requests.adapters import HTTPAdapter
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from urllib3.util.retry import Retry
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from .base import DataSourceAdapter
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class ApiAdapter(DataSourceAdapter):
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"""
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Adapter for fetching data from a REST API endpoint.
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"""
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def __init__(
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self,
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url: str,
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headers: Optional[Dict[str, str]] = None,
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timeout: float = 30
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):
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"""
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Initialize the API adapter.
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Args:
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url: Endpoint URL to fetch.
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headers: Optional HTTP headers.
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timeout: Timeout in seconds for the request.
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"""
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self.url = url
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self.headers = headers or {}
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self.timeout = timeout
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self.session = self._init_session()
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def _init_session(self) -> requests.Session:
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"""
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Initialize a requests.Session with retry logic.
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"""
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session = requests.Session()
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retries = Retry(
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total=3,
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backoff_factor=0.3,
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status_forcelist=[500, 502, 503, 504],
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allowed_methods=["GET"]
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)
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adapter = HTTPAdapter(max_retries=retries)
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session.mount("https://", adapter)
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session.mount("http://", adapter)
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return session
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def fetch(self) -> List[Dict[str, Any]]:
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"""
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Perform a GET request and return JSON data as a list of records.
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Returns:
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List of dicts from the JSON response.
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Raises:
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RuntimeError: On network error, HTTP error, or JSON parse error.
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"""
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try:
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response = self.session.get(
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self.url, headers=self.headers, timeout=self.timeout
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)
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response.raise_for_status()
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except requests.exceptions.RequestException as e:
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raise RuntimeError(f"API request failed: {e}")
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try:
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data = response.json()
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except ValueError as e:
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raise RuntimeError(f"Failed to parse JSON response: {e}")
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if isinstance(data, list):
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return data
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if isinstance(data, dict):
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return [data]
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raise RuntimeError("Unexpected JSON structure: expected list or dict.") |