mirror of
https://github.com/oobabooga/text-generation-webui.git
synced 2025-12-06 07:12:10 +01:00
586 lines
22 KiB
Python
586 lines
22 KiB
Python
import copy
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import json
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import time
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from collections import deque
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import tiktoken
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from pydantic import ValidationError
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from extensions.openai.errors import InvalidRequestError
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from extensions.openai.typing import ToolDefinition
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from extensions.openai.utils import debug_msg, getToolCallId, parseToolCall
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from modules import shared
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from modules.chat import (
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generate_chat_prompt,
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generate_chat_reply,
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load_character_memoized,
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load_instruction_template_memoized
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)
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from modules.image_utils import convert_openai_messages_to_images
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from modules.logging_colors import logger
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from modules.presets import load_preset_memoized
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from modules.text_generation import decode, encode, generate_reply
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def convert_logprobs_to_tiktoken(model, logprobs):
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# more problems than it's worth.
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# try:
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# encoder = tiktoken.encoding_for_model(model)
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# # just pick the first one if it encodes to multiple tokens... 99.9% not required and maybe worse overall.
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# return dict([(encoder.decode([encoder.encode(token)[0]]), prob) for token, prob in logprobs.items()])
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# except KeyError:
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# # assume native tokens if we can't find the tokenizer
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# return logprobs
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return logprobs
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def process_parameters(body, is_legacy=False):
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generate_params = body
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max_tokens_str = 'length' if is_legacy else 'max_tokens'
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generate_params['max_new_tokens'] = body.pop(max_tokens_str)
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if generate_params['truncation_length'] == 0:
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generate_params['truncation_length'] = shared.settings['truncation_length']
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if generate_params['temperature'] == 0:
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generate_params['do_sample'] = False
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generate_params['top_k'] = 1
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if body['preset'] is not None:
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preset = load_preset_memoized(body['preset'])
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generate_params.update(preset)
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generate_params['custom_stopping_strings'] = []
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if 'stop' in body: # str or array, max len 4 (ignored)
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if isinstance(body['stop'], str):
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generate_params['custom_stopping_strings'] = [body['stop']]
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elif isinstance(body['stop'], list):
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generate_params['custom_stopping_strings'] = body['stop']
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if shared.args.loader != 'llama.cpp':
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from transformers import LogitsProcessorList
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from modules.transformers_loader import (
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LogitsBiasProcessor,
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LogprobProcessor
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)
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logits_processor = []
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logit_bias = body.get('logit_bias', None)
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if logit_bias: # {str: float, ...}
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logits_processor = [LogitsBiasProcessor(logit_bias)]
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logprobs = None # coming to chat eventually
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if 'logprobs' in body:
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logprobs = body.get('logprobs', 0) # maybe cap at topk? don't clamp 0-5.
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generate_params['logprob_proc'] = LogprobProcessor(logprobs)
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logits_processor.extend([generate_params['logprob_proc']])
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else:
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logprobs = None
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if logits_processor: # requires logits_processor support
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generate_params['logits_processor'] = LogitsProcessorList(logits_processor)
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return generate_params
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def process_multimodal_content(content):
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"""Extract text from OpenAI multimodal format for non-multimodal models"""
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if isinstance(content, str):
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return content
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if isinstance(content, list):
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text_parts = []
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for item in content:
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if isinstance(item, dict) and item.get('type') == 'text':
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text_parts.append(item.get('text', ''))
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return ' '.join(text_parts) if text_parts else str(content)
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return str(content)
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def convert_history(history):
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'''
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Chat histories in this program are in the format [message, reply].
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This function converts OpenAI histories to that format.
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'''
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chat_dialogue = []
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current_message = ""
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current_reply = ""
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user_input = ""
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user_input_last = True
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system_message = ""
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for entry in history:
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content = entry["content"]
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role = entry["role"]
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if role == "user":
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# Extract text content (images handled by model-specific code)
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content = process_multimodal_content(content)
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user_input = content
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user_input_last = True
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if current_message:
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chat_dialogue.append([current_message, '', ''])
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current_message = ""
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current_message = content
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elif role == "assistant":
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if "tool_calls" in entry and isinstance(entry["tool_calls"], list) and len(entry["tool_calls"]) > 0 and content.strip() == "":
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continue # skip tool calls
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current_reply = content
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user_input_last = False
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if current_message:
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chat_dialogue.append([current_message, current_reply, ''])
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current_message = ""
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current_reply = ""
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else:
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chat_dialogue.append(['', current_reply, ''])
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elif role == "tool":
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user_input_last = False
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chat_dialogue.append(['', '', content])
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elif role == "system":
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system_message += f"\n{content}" if system_message else content
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if not user_input_last:
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user_input = ""
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return user_input, system_message, {
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'internal': chat_dialogue,
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'visible': copy.deepcopy(chat_dialogue),
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'messages': history # Store original messages for multimodal models
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}
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def chat_completions_common(body: dict, is_legacy: bool = False, stream=False, prompt_only=False) -> dict:
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if body.get('functions', []):
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raise InvalidRequestError(message="functions is not supported.", param='functions')
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if body.get('function_call', ''):
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raise InvalidRequestError(message="function_call is not supported.", param='function_call')
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if 'messages' not in body:
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raise InvalidRequestError(message="messages is required", param='messages')
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tools = None
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if 'tools' in body and body['tools'] is not None and isinstance(body['tools'], list) and len(body['tools']) > 0:
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tools = validateTools(body['tools']) # raises InvalidRequestError if validation fails
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messages = body['messages']
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for m in messages:
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if 'role' not in m:
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raise InvalidRequestError(message="messages: missing role", param='messages')
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elif m['role'] == 'function':
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raise InvalidRequestError(message="role: function is not supported.", param='messages')
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# Handle multimodal content validation
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content = m.get('content')
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if content is None:
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raise InvalidRequestError(message="messages: missing content", param='messages')
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# Validate multimodal content structure
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if isinstance(content, list):
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for item in content:
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if not isinstance(item, dict) or 'type' not in item:
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raise InvalidRequestError(message="messages: invalid content item format", param='messages')
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if item['type'] not in ['text', 'image_url']:
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raise InvalidRequestError(message="messages: unsupported content type", param='messages')
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if item['type'] == 'text' and 'text' not in item:
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raise InvalidRequestError(message="messages: missing text in content item", param='messages')
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if item['type'] == 'image_url' and ('image_url' not in item or 'url' not in item['image_url']):
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raise InvalidRequestError(message="messages: missing image_url in content item", param='messages')
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# Chat Completions
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object_type = 'chat.completion' if not stream else 'chat.completion.chunk'
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created_time = int(time.time())
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cmpl_id = "chatcmpl-%d" % (int(time.time() * 1000000000))
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resp_list = 'data' if is_legacy else 'choices'
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# generation parameters
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generate_params = process_parameters(body, is_legacy=is_legacy)
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continue_ = body['continue_']
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# Instruction template
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if body['instruction_template_str']:
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instruction_template_str = body['instruction_template_str']
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elif body['instruction_template']:
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instruction_template = body['instruction_template']
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instruction_template = "Alpaca" if instruction_template == "None" else instruction_template
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instruction_template_str = load_instruction_template_memoized(instruction_template)
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else:
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instruction_template_str = shared.settings['instruction_template_str']
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chat_template_str = body['chat_template_str'] or shared.default_settings['chat_template_str']
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chat_instruct_command = body['chat_instruct_command'] or shared.default_settings['chat-instruct_command']
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# Chat character
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character = body['character'] or shared.default_settings['character']
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character = "Assistant" if character == "None" else character
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name1 = body['user_name'] or shared.default_settings['name1']
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name1, name2, _, greeting, context = load_character_memoized(character, name1, '')
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name2 = body['bot_name'] or name2
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context = body['context'] or context
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greeting = body['greeting'] or greeting
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user_bio = body['user_bio'] or ''
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# History
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user_input, custom_system_message, history = convert_history(messages)
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generate_params.update({
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'mode': body['mode'],
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'name1': name1,
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'name2': name2,
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'context': context,
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'greeting': greeting,
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'user_bio': user_bio,
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'instruction_template_str': instruction_template_str,
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'custom_system_message': custom_system_message,
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'chat_template_str': chat_template_str,
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'chat-instruct_command': chat_instruct_command,
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'tools': tools,
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'history': history,
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'stream': stream
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})
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max_tokens = generate_params['max_new_tokens']
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if max_tokens in [None, 0]:
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generate_params['max_new_tokens'] = 512
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generate_params['auto_max_new_tokens'] = True
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requested_model = generate_params.pop('model')
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logprob_proc = generate_params.pop('logprob_proc', None)
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def chat_streaming_chunk(content, chunk_tool_calls=None):
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# begin streaming
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chunk = {
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"id": cmpl_id,
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"object": object_type,
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"created": created_time,
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"model": shared.model_name,
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resp_list: [{
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"index": 0,
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"finish_reason": None,
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"delta": {'role': 'assistant', 'content': content, 'tool_calls': chunk_tool_calls},
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}],
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}
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if logprob_proc: # not official for chat yet
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top_logprobs = convert_logprobs_to_tiktoken(model=requested_model, logprobs=logprob_proc.token_alternatives)
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chunk[resp_list][0]["logprobs"] = {'top_logprobs': [top_logprobs]}
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# else:
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# chunk[resp_list][0]["logprobs"] = None
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return chunk
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# generate reply #######################################
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prompt = generate_chat_prompt(user_input, generate_params, _continue=continue_)
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if prompt_only:
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yield {'prompt': prompt}
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return
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if stream:
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yield chat_streaming_chunk('')
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generator = generate_chat_reply(
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user_input, generate_params, regenerate=False, _continue=continue_, loading_message=False)
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answer = ''
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seen_content = ''
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tool_calls = []
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end_last_tool_call = 0
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supported_tools = [x["function"]["name"] for x in tools] if tools is not None else None
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for a in generator:
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answer = a['internal'][-1][1]
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if supported_tools is not None:
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tool_call = parseToolCall(answer[end_last_tool_call:], supported_tools) if len(answer) > 0 else []
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if len(tool_call) > 0:
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for tc in tool_call:
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tc["id"] = getToolCallId()
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tc["index"] = str(len(tool_calls))
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tc["function"]["arguments"] = json.dumps(tc["function"]["arguments"])
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tool_calls.append(tc)
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end_last_tool_call = len(answer)
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if stream:
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len_seen = len(seen_content)
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new_content = answer[len_seen:]
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if not new_content or chr(0xfffd) in new_content: # partial unicode character, don't send it yet.
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continue
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chunk = chat_streaming_chunk(new_content)
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seen_content = answer
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yield chunk
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# stop generation if tool_calls were generated previously
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if len(tool_calls) > 0:
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break
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token_count = len(encode(prompt)[0])
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completion_token_count = len(encode(answer)[0])
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stop_reason = "stop"
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if len(tool_calls) > 0:
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stop_reason = "tool_calls"
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if token_count + completion_token_count >= generate_params['truncation_length'] or completion_token_count >= generate_params['max_new_tokens']:
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stop_reason = "length"
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if stream:
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chunk = chat_streaming_chunk('', tool_calls)
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chunk[resp_list][0]['finish_reason'] = stop_reason
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chunk['usage'] = {
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"prompt_tokens": token_count,
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"completion_tokens": completion_token_count,
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"total_tokens": token_count + completion_token_count
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}
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yield chunk
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else:
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resp = {
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"id": cmpl_id,
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"object": object_type,
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"created": created_time,
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"model": shared.model_name,
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resp_list: [{
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"index": 0,
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"finish_reason": stop_reason,
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"message": {"role": "assistant", "content": answer},
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"tool_calls": tool_calls
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}],
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"usage": {
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"prompt_tokens": token_count,
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"completion_tokens": completion_token_count,
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"total_tokens": token_count + completion_token_count
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}
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}
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if logprob_proc: # not official for chat yet
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top_logprobs = convert_logprobs_to_tiktoken(model=requested_model, logprobs=logprob_proc.token_alternatives)
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resp[resp_list][0]["logprobs"] = {'top_logprobs': [top_logprobs]}
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# else:
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# resp[resp_list][0]["logprobs"] = None
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yield resp
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def completions_common(body: dict, is_legacy: bool = False, stream=False):
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object_type = 'text_completion.chunk' if stream else 'text_completion'
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created_time = int(time.time())
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cmpl_id = "conv-%d" % (int(time.time() * 1000000000))
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resp_list = 'data' if is_legacy else 'choices'
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prompt_str = 'context' if is_legacy else 'prompt'
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# Handle both prompt and messages format for unified multimodal support
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if prompt_str not in body or body[prompt_str] is None:
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if 'messages' in body:
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# Convert messages format to prompt for completions endpoint
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prompt_text = ""
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for message in body.get('messages', []):
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if isinstance(message, dict) and 'content' in message:
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# Extract text content from multimodal messages
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content = message['content']
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if isinstance(content, str):
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prompt_text += content
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elif isinstance(content, list):
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for item in content:
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if isinstance(item, dict) and item.get('type') == 'text':
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prompt_text += item.get('text', '')
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# Allow empty prompts for image-only requests
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body[prompt_str] = prompt_text
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else:
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raise InvalidRequestError("Missing required input", param=prompt_str)
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# common params
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generate_params = process_parameters(body, is_legacy=is_legacy)
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max_tokens = generate_params['max_new_tokens']
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generate_params['stream'] = stream
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requested_model = generate_params.pop('model')
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logprob_proc = generate_params.pop('logprob_proc', None)
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suffix = body['suffix'] if body['suffix'] else ''
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echo = body['echo']
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# Add messages to generate_params if present for multimodal processing
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if 'messages' in body:
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generate_params['messages'] = body['messages']
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raw_images = convert_openai_messages_to_images(generate_params['messages'])
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if raw_images:
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logger.info(f"Found {len(raw_images)} image(s) in request.")
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generate_params['raw_images'] = raw_images
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if not stream:
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prompt_arg = body[prompt_str]
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# Handle empty/None prompts (e.g., image-only requests)
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if prompt_arg is None:
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prompt_arg = ""
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if isinstance(prompt_arg, str) or (isinstance(prompt_arg, list) and len(prompt_arg) > 0 and isinstance(prompt_arg[0], int)):
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prompt_arg = [prompt_arg]
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resp_list_data = []
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total_completion_token_count = 0
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total_prompt_token_count = 0
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for idx, prompt in enumerate(prompt_arg, start=0):
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if isinstance(prompt, list) and len(prompt) > 0 and isinstance(prompt[0], int):
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# token lists
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if requested_model == shared.model_name:
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prompt = decode(prompt)[0]
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else:
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try:
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encoder = tiktoken.encoding_for_model(requested_model)
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prompt = encoder.decode(prompt)
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except KeyError:
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prompt = decode(prompt)[0]
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prefix = prompt if echo else ''
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# generate reply #######################################
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debug_msg({'prompt': prompt, 'generate_params': generate_params})
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generator = generate_reply(prompt, generate_params, is_chat=False)
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answer = ''
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for a in generator:
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answer = a
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token_count = len(encode(prompt)[0])
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total_prompt_token_count += token_count
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completion_token_count = len(encode(answer)[0])
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total_completion_token_count += completion_token_count
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stop_reason = "stop"
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if token_count + completion_token_count >= generate_params['truncation_length'] or completion_token_count >= max_tokens:
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stop_reason = "length"
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respi = {
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"index": idx,
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"finish_reason": stop_reason,
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"text": prefix + answer + suffix,
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"logprobs": {'top_logprobs': [logprob_proc.token_alternatives]} if logprob_proc else None,
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}
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resp_list_data.extend([respi])
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resp = {
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"id": cmpl_id,
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"object": object_type,
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"created": created_time,
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"model": shared.model_name,
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resp_list: resp_list_data,
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"usage": {
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"prompt_tokens": total_prompt_token_count,
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"completion_tokens": total_completion_token_count,
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"total_tokens": total_prompt_token_count + total_completion_token_count
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}
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}
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yield resp
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else:
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prompt = body[prompt_str]
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if isinstance(prompt, list):
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if prompt and isinstance(prompt[0], int):
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try:
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encoder = tiktoken.encoding_for_model(requested_model)
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prompt = encoder.decode(prompt)
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except KeyError:
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prompt = decode(prompt)[0]
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else:
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raise InvalidRequestError(message="API Batched generation not yet supported.", param=prompt_str)
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prefix = prompt if echo else ''
|
|
token_count = len(encode(prompt)[0])
|
|
|
|
def text_streaming_chunk(content):
|
|
# begin streaming
|
|
chunk = {
|
|
"id": cmpl_id,
|
|
"object": object_type,
|
|
"created": created_time,
|
|
"model": shared.model_name,
|
|
resp_list: [{
|
|
"index": 0,
|
|
"finish_reason": None,
|
|
"text": content,
|
|
"logprobs": {'top_logprobs': [logprob_proc.token_alternatives]} if logprob_proc else None,
|
|
}],
|
|
}
|
|
|
|
return chunk
|
|
|
|
yield text_streaming_chunk(prefix)
|
|
|
|
# generate reply #######################################
|
|
debug_msg({'prompt': prompt, 'generate_params': generate_params})
|
|
generator = generate_reply(prompt, generate_params, is_chat=False)
|
|
answer = ''
|
|
seen_content = ''
|
|
completion_token_count = 0
|
|
|
|
for a in generator:
|
|
answer = a
|
|
|
|
len_seen = len(seen_content)
|
|
new_content = answer[len_seen:]
|
|
|
|
if not new_content or chr(0xfffd) in new_content: # partial unicode character, don't send it yet.
|
|
continue
|
|
|
|
seen_content = answer
|
|
chunk = text_streaming_chunk(new_content)
|
|
yield chunk
|
|
|
|
completion_token_count = len(encode(answer)[0])
|
|
stop_reason = "stop"
|
|
if token_count + completion_token_count >= generate_params['truncation_length'] or completion_token_count >= max_tokens:
|
|
stop_reason = "length"
|
|
|
|
chunk = text_streaming_chunk(suffix)
|
|
chunk[resp_list][0]["finish_reason"] = stop_reason
|
|
chunk["usage"] = {
|
|
"prompt_tokens": token_count,
|
|
"completion_tokens": completion_token_count,
|
|
"total_tokens": token_count + completion_token_count
|
|
}
|
|
|
|
yield chunk
|
|
|
|
|
|
def chat_completions(body: dict, is_legacy: bool = False) -> dict:
|
|
generator = chat_completions_common(body, is_legacy, stream=False)
|
|
return deque(generator, maxlen=1).pop()
|
|
|
|
|
|
def stream_chat_completions(body: dict, is_legacy: bool = False):
|
|
for resp in chat_completions_common(body, is_legacy, stream=True):
|
|
yield resp
|
|
|
|
|
|
def completions(body: dict, is_legacy: bool = False) -> dict:
|
|
generator = completions_common(body, is_legacy, stream=False)
|
|
return deque(generator, maxlen=1).pop()
|
|
|
|
|
|
def stream_completions(body: dict, is_legacy: bool = False):
|
|
for resp in completions_common(body, is_legacy, stream=True):
|
|
yield resp
|
|
|
|
|
|
def validateTools(tools: list[dict]):
|
|
# Validate each tool definition in the JSON array
|
|
valid_tools = None
|
|
for idx in range(len(tools)):
|
|
tool = tools[idx]
|
|
try:
|
|
tool_definition = ToolDefinition(**tool)
|
|
if valid_tools is None:
|
|
valid_tools = []
|
|
valid_tools.append(tool)
|
|
except ValidationError:
|
|
raise InvalidRequestError(message=f"Invalid tool specification at index {idx}.", param='tools')
|
|
|
|
return valid_tools
|