import json from flask import request, Flask from g4f.image import is_allowed_extension, to_image from .api import Api class Backend_Api(Api): """ Handles various endpoints in a Flask application for backend operations. This class provides methods to interact with models, providers, and to handle various functionalities like conversations, error handling, and version management. Attributes: app (Flask): A Flask application instance. routes (dict): A dictionary mapping API endpoints to their respective handlers. """ def __init__(self, app: Flask) -> None: """ Initialize the backend API with the given Flask application. Args: app (Flask): Flask application instance to attach routes to. """ self.app: Flask = app self.routes = { '/backend-api/v2/models': { 'function': self.get_models, 'methods': ['GET'] }, '/backend-api/v2/models/': { 'function': self.get_provider_models, 'methods': ['GET'] }, '/backend-api/v2/providers': { 'function': self.get_providers, 'methods': ['GET'] }, '/backend-api/v2/version': { 'function': self.get_version, 'methods': ['GET'] }, '/backend-api/v2/conversation': { 'function': self.handle_conversation, 'methods': ['POST'] }, '/backend-api/v2/gen.set.summarize:title': { 'function': self.generate_title, 'methods': ['POST'] }, '/backend-api/v2/error': { 'function': self.handle_error, 'methods': ['POST'] } } def handle_error(self): """ Initialize the backend API with the given Flask application. Args: app (Flask): Flask application instance to attach routes to. """ print(request.json) return 'ok', 200 def handle_conversation(self): """ Handles conversation requests and streams responses back. Returns: Response: A Flask response object for streaming. """ kwargs = {} if "file" in request.files: file = request.files['file'] if file.filename != '' and is_allowed_extension(file.filename): kwargs['image'] = to_image(file.stream, file.filename.endswith('.svg')) kwargs['image_name'] = file.filename if "json" in request.form: json_data = json.loads(request.form['json']) else: json_data = request.json kwargs = self._prepare_conversation_kwargs(json_data, kwargs) return self.app.response_class( self._create_response_stream(kwargs), mimetype='text/event-stream' ) def get_provider_models(self, provider: str): models = super().get_provider_models(provider) if models is None: return 404, "Provider not found" return models def _format_json(self, response_type: str, content) -> str: """ Formats and returns a JSON response. Args: response_type (str): The type of the response. content: The content to be included in the response. Returns: str: A JSON formatted string. """ return json.dumps(super()._format_json(response_type, content)) + "\n"