256 lines
11 KiB
Python
256 lines
11 KiB
Python
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, request
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from llm_server import opts
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from llm_server.cluster.backend import get_a_cluster_backend
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from llm_server.cluster.cluster_config import cluster_config
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from llm_server.custom_redis import redis
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from llm_server.database.conn import database
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from llm_server.database.database import log_prompt
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from llm_server.helpers import auto_set_base_client_api
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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.auth import parse_token
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from llm_server.routes.helpers.http import require_api_key, validate_json
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from llm_server.routes.queue import RedisPriorityQueue, priority_queue
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DEFAULT_PRIORITY = 9999
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class RequestHandler:
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def __init__(self, incoming_request: flask.Request, selected_model: str, incoming_json: Union[dict, str] = None):
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self.request = incoming_request
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self.enable_backend_blind_rrd = request.headers.get('LLM-Blind-RRD', False) == 'true'
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# Routes need to validate it, here we just load it
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if incoming_json:
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self.request_valid_json, self.request_json_body = validate_json(incoming_json)
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else:
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self.request_valid_json, self.request_json_body = validate_json(self.request)
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if not self.request_valid_json:
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raise Exception(f'Not valid JSON. Routes are supposed to reject invalid JSON.')
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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.get_auth_token()
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self.token_priority, self.token_simultaneous_ip = self.get_token_ratelimit()
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self.backend_url = get_a_cluster_backend(selected_model)
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self.cluster_backend_info = cluster_config.get_backend(self.backend_url)
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if not self.cluster_backend_info.get('mode'):
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print(self.backend_url, self.cluster_backend_info)
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self.backend = get_backend_handler(self.cluster_backend_info['mode'], self.backend_url)
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self.parameters = None
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self.used = False
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self.selected_model = selected_model
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redis.zadd('recent_prompters', {self.client_ip: time.time()})
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def get_auth_token(self):
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if self.request_json_body.get('X-API-KEY'):
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return self.request_json_body['X-API-KEY']
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elif self.request.headers.get('X-Api-Key'):
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return self.request.headers['X-Api-Key']
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elif self.request.headers.get('Authorization'):
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return parse_token(self.request.headers['Authorization'])
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def get_client_ip(self):
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if self.request.headers.get('X-Connecting-IP'):
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return self.request.headers.get('X-Connecting-IP')
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elif 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_token_ratelimit(self):
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priority = DEFAULT_PRIORITY
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simultaneous_ip = opts.simultaneous_requests_per_ip
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if self.token:
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cursor = database.cursor()
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try:
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cursor.execute("SELECT priority, simultaneous_ip FROM token_auth WHERE token = %s", (self.token,))
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result = cursor.fetchone()
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if result:
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priority, simultaneous_ip = result
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if simultaneous_ip is None:
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# No ratelimit for this token if null
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simultaneous_ip = 999999999
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finally:
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cursor.close()
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return priority, simultaneous_ip
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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, prompt: str = None, do_log: bool = False) -> Tuple[bool, Tuple[Response | None, int]]:
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"""
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This needs to be called at the start of the subclass handle_request() method.
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:param prompt:
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:param do_log:
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:return:
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"""
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invalid_request_err_msgs = []
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self.parameters, parameters_invalid_msg = self.get_parameters() # Parameters will be None if invalid.
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if self.parameters and not parameters_invalid_msg:
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# Backends shouldn't check max_new_tokens, but rather things specific to their backend.
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# Let the RequestHandler do the generic checks.
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if self.parameters.get('max_new_tokens', 0) > opts.max_new_tokens:
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invalid_request_err_msgs.append(f'`max_new_tokens` must be less than or equal to {opts.max_new_tokens}')
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if prompt:
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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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invalid_request_err_msgs.append(invalid_prompt_err_msg)
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request_valid, invalid_request_err_msg = self.backend.validate_request(self.parameters, prompt, self.request)
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if not request_valid:
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invalid_request_err_msgs.append(invalid_request_err_msg)
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else:
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invalid_request_err_msgs.append(parameters_invalid_msg)
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if len(invalid_request_err_msgs):
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if len(invalid_request_err_msgs) > 1:
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# Format multiple error messages each on a new line.
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e = [f'\n{x}.' for x in invalid_request_err_msgs]
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combined_error_message = '\n'.join(e)
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else:
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# Otherwise, just grab the first and only one.
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combined_error_message = invalid_request_err_msgs[0] + '.'
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backend_response = self.handle_error(combined_error_message, 'Validation Error')
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if do_log:
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log_prompt(self.client_ip, self.token, self.request_json_body.get('prompt', ''), backend_response[0].data.decode('utf-8'), 0, self.parameters, dict(self.request.headers), 0, self.request.url, self.backend_url, is_error=True)
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return False, 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 again before submission since the backend handler may have changed something.
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# Also, this is the first time we validate the prompt.
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request_valid, invalid_response = self.validate_request(prompt, do_log=True)
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if not request_valid:
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return (False, None, None, 0), invalid_response
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event = priority_queue.put((llm_request, self.client_ip, self.token, self.parameters, self.backend_url), self.token_priority, self.selected_model)
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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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# TODO: add wait timeout
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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 = self.handle_error(error_msg)
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log_prompt(self.client_ip, self.token, prompt, backend_response[0].data.decode('utf-8'), None, self.parameters, dict(self.request.headers), response_status_code, self.request.url, self.backend_url, is_error=True)
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return (False, None, None, 0), 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 = self.handle_error(error_msg)
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log_prompt(self.client_ip, self.token, prompt, backend_response[0].data.decode('utf-8'), elapsed_time, self.parameters, dict(self.request.headers), response_status_code, self.request.url, self.backend_url, is_error=True)
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return (False, None, None, 0), 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 = int(priority_queue.get_queued_ip_count(self.client_ip))
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x = redis.hget('processing_ips', self.client_ip)
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if x:
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processing_ip = int(x)
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else:
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processing_ip = 0
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if queued_ip_count + processing_ip < self.token_simultaneous_ip or self.token_priority == 0:
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return False
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else:
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print(f'Rejecting request from {self.client_ip} - {queued_ip_count + processing_ip} queued + processing.')
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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, do_log: bool = True) -> Tuple[flask.Response, int]:
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raise NotImplementedError
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def handle_error(self, error_msg: str, error_type: str = 'error') -> Tuple[flask.Response, int]:
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raise NotImplementedError
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def get_backend_handler(mode, backend_url: str):
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if mode == 'oobabooga':
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return OobaboogaBackend(backend_url)
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elif mode == 'vllm':
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return VLLMBackend(backend_url)
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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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def before_request():
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auto_set_base_client_api(request)
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if request.endpoint != 'v1.get_stats':
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response = require_api_key()
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if response is not None:
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return response
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