181 lines
7.8 KiB
Python
181 lines
7.8 KiB
Python
import sqlite3
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import time
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from typing import Tuple, Union
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import flask
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from flask import Response
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from llm_server import opts
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from llm_server.database import log_prompt
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from llm_server.llm.oobabooga.ooba_backend import OobaboogaBackend
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from llm_server.llm.vllm.vllm_backend import VLLMBackend
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from llm_server.routes.cache import redis
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from llm_server.routes.helpers.client import format_sillytavern_err
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from llm_server.routes.helpers.http import validate_json
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from llm_server.routes.queue import priority_queue
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from llm_server.routes.stats import SemaphoreCheckerThread
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DEFAULT_PRIORITY = 9999
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class RequestHandler:
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def __init__(self, incoming_request: flask.Request):
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self.request = incoming_request
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_, self.request_json_body = validate_json(self.request) # routes need to validate it, here we just load it
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self.start_time = time.time()
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self.client_ip = self.get_client_ip()
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self.token = self.request.headers.get('X-Api-Key')
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self.priority = self.get_priority()
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self.backend = get_backend()
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self.parameters = None
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self.used = False
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SemaphoreCheckerThread.recent_prompters[self.client_ip] = time.time()
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def get_client_ip(self):
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if self.request.headers.get('cf-connecting-ip'):
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return self.request.headers.get('cf-connecting-ip')
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elif self.request.headers.get('x-forwarded-for'):
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return self.request.headers.get('x-forwarded-for').split(',')[0]
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else:
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return self.request.remote_addr
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def get_priority(self):
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if self.token:
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conn = sqlite3.connect(opts.database_path)
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cursor = conn.cursor()
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cursor.execute("SELECT priority FROM token_auth WHERE token = ?", (self.token,))
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result = cursor.fetchone()
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conn.close()
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if result:
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return result[0]
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return DEFAULT_PRIORITY
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def get_parameters(self):
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if self.request_json_body.get('max_tokens'):
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self.request_json_body['max_new_tokens'] = self.request_json_body.pop('max_tokens')
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parameters, parameters_invalid_msg = self.backend.get_parameters(self.request_json_body)
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return parameters, parameters_invalid_msg
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def validate_request(self) -> Tuple[bool, Tuple[Response | None, int]]:
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self.parameters, parameters_invalid_msg = self.get_parameters()
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request_valid = False
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invalid_request_err_msg = None
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if self.parameters:
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request_valid, invalid_request_err_msg = self.backend.validate_request(self.parameters)
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if not request_valid:
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error_messages = [msg for valid, msg in [(request_valid, invalid_request_err_msg), (not bool(parameters_invalid_msg), parameters_invalid_msg)] if not valid and msg]
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combined_error_message = ', '.join(error_messages)
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backend_response = format_sillytavern_err(f'Validation Error: {combined_error_message}.', 'error')
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log_prompt(self.client_ip, self.token, self.request_json_body.get('prompt', ''), backend_response, 0, self.parameters, dict(self.request.headers), 0, self.request.url, is_error=True)
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return False, self.handle_error(backend_response)
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return True, (None, 0)
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def generate_response(self, llm_request: dict) -> Tuple[Tuple[bool, flask.Response | None, str | None, float], Tuple[Response, int]]:
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prompt = llm_request['prompt']
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if not self.is_client_ratelimited():
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# Validate the prompt right before submission since the backend handler may have changed something.
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prompt_valid, invalid_prompt_err_msg = self.backend.validate_prompt(prompt)
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if not prompt_valid:
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backend_response = format_sillytavern_err(f'Validation Error: {invalid_prompt_err_msg}.', 'error')
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log_prompt(self.client_ip, self.token, self.request_json_body.get('prompt', ''), backend_response, 0, self.parameters, dict(self.request.headers), 0, self.request.url, is_error=True)
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return (False, None, None, 0), self.handle_error(backend_response)
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event = priority_queue.put((llm_request, self.client_ip, self.token, self.parameters), self.priority)
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else:
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event = None
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if not event:
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return (False, None, None, 0), self.handle_ratelimited()
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success, response, error_msg = event.wait()
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end_time = time.time()
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elapsed_time = end_time - self.start_time
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if response:
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try:
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# Be extra careful when getting attributes from the response object
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response_status_code = response.status_code
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except:
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response_status_code = 0
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else:
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response_status_code = None
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# ===============================================
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# We encountered an error
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if not success or not response or error_msg:
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if not error_msg or error_msg == '':
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error_msg = 'Unknown error.'
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else:
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error_msg = error_msg.strip('.') + '.'
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backend_response = format_sillytavern_err(error_msg, 'error')
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log_prompt(self.client_ip, self.token, prompt, backend_response, None, self.parameters, dict(self.request.headers), response_status_code, self.request.url, is_error=True)
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return (False, None, None, 0), self.handle_error(backend_response)
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# ===============================================
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response_valid_json, response_json_body = validate_json(response)
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return_json_err = False
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# The backend didn't send valid JSON
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if not response_valid_json:
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return_json_err = True
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# Make sure the backend didn't crap out.
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results = response_json_body.get('results', [])
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if len(results) and not results[0].get('text'):
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return_json_err = True
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if return_json_err:
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error_msg = 'The backend did not return valid JSON.'
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backend_response = format_sillytavern_err(error_msg, 'error')
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log_prompt(self.client_ip, self.token, prompt, backend_response, elapsed_time, self.parameters, dict(self.request.headers), response_status_code, self.request.url, is_error=True)
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return (False, None, None, 0), self.handle_error(backend_response)
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# ===============================================
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self.used = True
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return (success, response, error_msg, elapsed_time), self.backend.handle_response(success, self.request, response_json_body, response_status_code, self.client_ip, self.token, prompt, elapsed_time, self.parameters, dict(self.request.headers))
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def is_client_ratelimited(self) -> bool:
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queued_ip_count = redis.get_dict('queued_ip_count').get(self.client_ip, 0) + redis.get_dict('processing_ips').get(self.client_ip, 0)
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if queued_ip_count < opts.simultaneous_requests_per_ip or self.priority == 0:
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return False
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else:
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return True
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def handle_request(self) -> Tuple[flask.Response, int]:
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# Must include this in your child.
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# if self.used:
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# raise Exception('Can only use a RequestHandler object once.')
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raise NotImplementedError
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def handle_ratelimited(self) -> Tuple[flask.Response, int]:
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raise NotImplementedError
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def handle_error(self, msg: str) -> Tuple[flask.Response, int]:
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raise NotImplementedError
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def get_backend():
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if opts.mode == 'oobabooga':
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return OobaboogaBackend()
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elif opts.mode == 'vllm':
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return VLLMBackend()
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else:
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raise Exception
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def delete_dict_key(d: dict, k: Union[str, list]):
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if isinstance(k, str):
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if k in d.keys():
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del d[k]
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elif isinstance(k, list):
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for item in k:
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if item in d.keys():
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del d[item]
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else:
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raise ValueError
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return d
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