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import logging
import json
from flask import request, Flask
from g4f import debug, version, models
from g4f import _all_models, get_last_provider, ChatCompletion
from g4f.image import is_allowed_extension, to_image
from g4f.Provider import __providers__
from g4f.Provider.bing.create_images import patch_provider
from .internet import get_search_message
debug.logging = True
class Backend_Api:
def __init__(self, app: Flask) -> None:
self.app: Flask = app
self.routes = {
'/backend-api/v2/models': {
'function': self.models,
'methods' : ['GET']
},
'/backend-api/v2/providers': {
'function': self.providers,
'methods' : ['GET']
},
'/backend-api/v2/version': {
'function': self.version,
'methods' : ['GET']
},
'/backend-api/v2/conversation': {
'function': self._conversation,
'methods': ['POST']
},
'/backend-api/v2/gen.set.summarize:title': {
'function': self._gen_title,
'methods': ['POST']
},
'/backend-api/v2/error': {
'function': self.error,
'methods': ['POST']
}
}
def error(self):
print(request.json)
return 'ok', 200
def models(self):
return _all_models
def providers(self):
return [
provider.__name__ for provider in __providers__ if provider.working
]
def version(self):
return {
"version": version.utils.current_version,
"lastet_version": version.get_latest_version(),
}
def _gen_title(self):
return {
'title': ''
}
def _conversation(self):
kwargs = {}
if 'image' in request.files:
file = request.files['image']
if file.filename != '' and is_allowed_extension(file.filename):
kwargs['image'] = to_image(file.stream)
if 'json' in request.form:
json_data = json.loads(request.form['json'])
else:
json_data = request.json
provider = json_data.get('provider', '').replace('g4f.Provider.', '')
provider = provider if provider and provider != "Auto" else None
if provider == 'OpenaiChat':
kwargs['auto_continue'] = True
messages = json_data['messages']
if json_data.get('web_search'):
if provider == "Bing":
kwargs['web_search'] = True
else:
messages[-1]["content"] = get_search_message(messages[-1]["content"])
model = json_data.get('model')
model = model if model else models.default
provider = json_data.get('provider', '').replace('g4f.Provider.', '')
provider = provider if provider and provider != "Auto" else None
patch = patch_provider if json_data.get('patch_provider') else None
def try_response():
try:
first = True
for chunk in ChatCompletion.create(
model=model,
provider=provider,
messages=messages,
stream=True,
ignore_stream_and_auth=True,
patch_provider=patch,
**kwargs
):
if first:
first = False
yield json.dumps({
'type' : 'provider',
'provider': get_last_provider(True)
}) + "\n"
if isinstance(chunk, Exception):
yield json.dumps({
'type' : 'message',
'message': get_error_message(chunk),
}) + "\n"
else:
yield json.dumps({
'type' : 'content',
'content': str(chunk),
}) + "\n"
except Exception as e:
logging.exception(e)
yield json.dumps({
'type' : 'error',
'error': get_error_message(e)
})
return self.app.response_class(try_response(), mimetype='text/event-stream')
def get_error_message(exception: Exception) -> str:
return f"{get_last_provider().__name__}: {type(exception).__name__}: {exception}"
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