mirror of
https://github.com/NovaOSS/nova-api.git
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99 lines
3.5 KiB
Python
99 lines
3.5 KiB
Python
"""Does quite a few checks and prepares the incoming request for the target endpoint, so it can be streamed"""
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import json
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import yaml
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import fastapi
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from dotenv import load_dotenv
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import streaming
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import moderation
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from db import users
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from helpers import tokens, errors
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load_dotenv()
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models_list = json.load(open('models.json'))
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with open('config/credits.yml', encoding='utf8') as f:
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credits_config = yaml.safe_load(f)
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async def handle(incoming_request):
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"""
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### Transfer a streaming response
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Takes the request from the incoming request to the target endpoint.
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Checks method, token amount, auth and cost along with if request is NSFW.
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"""
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path = incoming_request.url.path.replace('v1/v1/', 'v1/')
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allowed_methods = {'GET', 'POST', 'PUT', 'DELETE', 'PATCH'}
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method = incoming_request.method
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if method not in allowed_methods:
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return await errors.error(405, f'Method "{method}" is not allowed.', 'Change the request method to the correct one.')
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payload = await incoming_request.json()
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try:
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input_tokens = await tokens.count_for_messages(payload.get('messages', []))
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except (KeyError, TypeError):
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input_tokens = 0
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received_key = incoming_request.headers.get('Authorization')
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if not received_key or not received_key.startswith('Bearer '):
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return await errors.error(401, 'No NovaAI API key given!', 'Add "Authorization: Bearer nv-..." to your request headers.')
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user = await users.by_api_key(received_key.split('Bearer ')[1].strip())
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if not user or not user['status']['active']:
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return await errors.error(401, 'Invalid or inactive NovaAI API key!', 'Create a new NovaOSS API key or reactivate your account.')
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ban_reason = user['status']['ban_reason']
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if ban_reason:
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return await errors.error(403, f'Your NovaAI account has been banned. Reason: "{ban_reason}".', 'Contact the staff for an appeal.')
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path_contains_models = '/models' in path
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if path_contains_models:
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return fastapi.responses.JSONResponse(content=models_list)
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costs = credits_config['costs']
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cost = costs['other']
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if 'chat/completions' in path:
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cost = costs['chat-models'].get(payload.get('model'), cost)
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policy_violation = False
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if 'chat/completions' in path or ('input' in payload or 'prompt' in payload):
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inp = payload.get('input', payload.get('prompt', ''))
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if inp and len(inp) > 2 and not inp.isnumeric():
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policy_violation = await moderation.is_policy_violated(inp)
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if policy_violation:
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return await errors.error(400, f'The request contains content which violates this model\'s policies for "{policy_violation}".', 'We currently don\'t support any NSFW models.')
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role_cost_multiplier = credits_config['bonuses'].get(user['role'], 1)
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cost = round(cost * role_cost_multiplier)
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if user['credits'] < cost:
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return await errors.error(429, 'Not enough credits.', 'Wait or earn more credits. Learn more on our website or Discord server.')
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if 'chat/completions' in path and not payload.get('stream', False):
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payload['stream'] = False
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media_type = 'text/event-stream' if payload.get('stream', False) else 'application/json'
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return fastapi.responses.StreamingResponse(
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content=streaming.stream(
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user=user,
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path=path,
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payload=payload,
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credits_cost=cost,
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input_tokens=input_tokens,
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incoming_request=incoming_request,
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),
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media_type=media_type
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)
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