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import typing
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from .. import BaseProvider
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import g4f; g4f.debug.logging = True
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import time
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import json
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import random
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import string
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import logging
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from typing import Union
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from loguru import logger
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from waitress import serve
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from ._logging import hook_logging
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from ._tokenizer import tokenize
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from flask_cors import CORS
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from werkzeug.serving import WSGIRequestHandler
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from werkzeug.exceptions import default_exceptions
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from werkzeug.middleware.proxy_fix import ProxyFix
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from flask import (
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Flask,
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jsonify,
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make_response,
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request,
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)
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class Api:
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__default_ip = '127.0.0.1'
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__default_port = 1337
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def __init__(self, engine: g4f, debug: bool = True, sentry: bool = False,
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list_ignored_providers:typing.List[typing.Union[str, BaseProvider]]=None) -> None:
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self.engine = engine
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self.debug = debug
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self.sentry = sentry
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self.list_ignored_providers = list_ignored_providers
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self.log_level = logging.DEBUG if debug else logging.WARN
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hook_logging(level=self.log_level, format='[%(asctime)s] %(levelname)s in %(module)s: %(message)s')
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self.logger = logging.getLogger('waitress')
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self.app = Flask(__name__)
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self.app.wsgi_app = ProxyFix(self.app.wsgi_app, x_port=1)
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self.app.after_request(self.__after_request)
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def run(self, bind_str, threads=8):
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host, port = self.__parse_bind(bind_str)
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CORS(self.app, resources={r'/v1/*': {'supports_credentials': True, 'expose_headers': [
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'Content-Type',
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'Authorization',
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'X-Requested-With',
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'Accept',
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'Origin',
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'Access-Control-Request-Method',
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'Access-Control-Request-Headers',
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'Content-Disposition'], 'max_age': 600}})
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self.app.route('/v1/models', methods=['GET'])(self.models)
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self.app.route('/v1/models/<model_id>', methods=['GET'])(self.model_info)
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self.app.route('/v1/chat/completions', methods=['POST'])(self.chat_completions)
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self.app.route('/v1/completions', methods=['POST'])(self.completions)
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for ex in default_exceptions:
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self.app.register_error_handler(ex, self.__handle_error)
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if not self.debug:
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self.logger.warning(f'Serving on http://{host}:{port}')
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WSGIRequestHandler.protocol_version = 'HTTP/1.1'
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serve(self.app, host=host, port=port, ident=None, threads=threads)
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def __handle_error(self, e: Exception):
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self.logger.error(e)
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return make_response(jsonify({
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'code': e.code,
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'message': str(e.original_exception if self.debug and hasattr(e, 'original_exception') else e.name)}), 500)
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@staticmethod
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def __after_request(resp):
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resp.headers['X-Server'] = f'g4f/{g4f.version}'
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return resp
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def __parse_bind(self, bind_str):
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sections = bind_str.split(':', 2)
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if len(sections) < 2:
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try:
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port = int(sections[0])
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return self.__default_ip, port
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except ValueError:
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return sections[0], self.__default_port
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return sections[0], int(sections[1])
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async def home(self):
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return 'Hello world | https://127.0.0.1:1337/v1'
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async def chat_completions(self):
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model = request.json.get('model', 'gpt-3.5-turbo')
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stream = request.json.get('stream', False)
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messages = request.json.get('messages')
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logger.info(f'model: {model}, stream: {stream}, request: {messages[-1]["content"]}')
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config = None
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proxy = None
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try:
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config = json.load(open("config.json","r",encoding="utf-8"))
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proxy = config["proxy"]
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except Exception:
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pass
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if proxy != None:
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response = self.engine.ChatCompletion.create(model=model,
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stream=stream, messages=messages,
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ignored=self.list_ignored_providers,
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proxy=proxy)
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else:
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response = self.engine.ChatCompletion.create(model=model,
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stream=stream, messages=messages,
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ignored=self.list_ignored_providers)
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completion_id = ''.join(random.choices(string.ascii_letters + string.digits, k=28))
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completion_timestamp = int(time.time())
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if not stream:
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prompt_tokens, _ = tokenize(''.join([message['content'] for message in messages]))
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completion_tokens, _ = tokenize(response)
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return {
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'id': f'chatcmpl-{completion_id}',
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'object': 'chat.completion',
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'created': completion_timestamp,
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'model': model,
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'choices': [
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{
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'index': 0,
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'message': {
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'role': 'assistant',
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'content': response,
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},
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'finish_reason': 'stop',
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}
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],
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'usage': {
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'prompt_tokens': prompt_tokens,
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'completion_tokens': completion_tokens,
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'total_tokens': prompt_tokens + completion_tokens,
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},
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}
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def streaming():
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try:
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for chunk in response:
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completion_data = {
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'id': f'chatcmpl-{completion_id}',
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'object': 'chat.completion.chunk',
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'created': completion_timestamp,
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'model': model,
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'choices': [
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{
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'index': 0,
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'delta': {
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'content': chunk,
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},
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'finish_reason': None,
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}
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],
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}
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content = json.dumps(completion_data, separators=(',', ':'))
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yield f'data: {content}\n\n'
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time.sleep(0.03)
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end_completion_data = {
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'id': f'chatcmpl-{completion_id}',
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'object': 'chat.completion.chunk',
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'created': completion_timestamp,
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'model': model,
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'choices': [
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{
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'index': 0,
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'delta': {},
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'finish_reason': 'stop',
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}
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],
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}
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content = json.dumps(end_completion_data, separators=(',', ':'))
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yield f'data: {content}\n\n'
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logger.success(f'model: {model}, stream: {stream}')
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except GeneratorExit:
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pass
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return self.app.response_class(streaming(), mimetype='text/event-stream')
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async def completions(self):
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return 'not working yet', 500
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async def model_info(self, model_name):
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model_info = (g4f.ModelUtils.convert[model_name])
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return jsonify({
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'id' : model_name,
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'object' : 'model',
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'created' : 0,
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'owned_by' : model_info.base_provider
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})
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async def models(self):
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model_list = [{
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'id' : model,
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'object' : 'model',
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'created' : 0,
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'owned_by' : 'g4f'} for model in g4f.Model.__all__()]
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return jsonify({
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'object': 'list',
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'data': model_list})
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