Delete utils.py
Browse files
utils.py
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import json
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import uuid
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import time
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import tiktoken
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from constants import CHAT_COMPLETION_CHUNK, CONTENT_TYPE_EVENT_STREAM
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from flask import jsonify
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def generate_system_fingerprint():
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"""生成并返回唯一的系统指纹。"""
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return f"fp_{uuid.uuid4().hex[:10]}"
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def create_openai_chunk(content, model, finish_reason=None, usage=None):
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"""创建格式化的 OpenAI 响应块。"""
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chunk = {
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"id": f"chatcmpl-{uuid.uuid4()}",
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"object": CHAT_COMPLETION_CHUNK,
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"created": int(time.time()),
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"model": model,
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"system_fingerprint": generate_system_fingerprint(),
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"choices": [
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{
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"index": 0,
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"delta": {"content": content} if content else {},
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"logprobs": None,
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"finish_reason": finish_reason
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}
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]
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}
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if usage is not None:
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chunk["usage"] = usage
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return chunk
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def count_tokens(text, model="gpt-3.5-turbo-0301"):
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"""计算给定文本的令牌数量。"""
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try:
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return len(tiktoken.encoding_for_model(model).encode(text))
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except KeyError:
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return len(tiktoken.get_encoding("cl100k_base").encode(text))
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def count_message_tokens(messages, model="gpt-3.5-turbo-0301"):
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"""计算消息列表中的总令牌数量。"""
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return sum(count_tokens(str(message), model) for message in messages)
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def stream_notdiamond_response(response, model):
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"""流式处理 notdiamond API 响应。"""
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buffer = ""
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for chunk in response.iter_content(1024):
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if chunk:
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buffer = chunk.decode('utf-8')
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yield create_openai_chunk(buffer, model)
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yield create_openai_chunk('', model, 'stop')
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def handle_non_stream_response(response, model, prompt_tokens):
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"""处理非流式 API 响应并构建最终 JSON。"""
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full_content = ""
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for chunk in stream_notdiamond_response(response, model):
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if chunk['choices'][0]['delta'].get('content'):
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full_content += chunk['choices'][0]['delta']['content']
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completion_tokens = count_tokens(full_content, model)
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total_tokens = prompt_tokens + completion_tokens
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return jsonify({
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"id": f"chatcmpl-{uuid.uuid4()}",
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"object": "chat.completion",
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"created": int(time.time()),
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"model": model,
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"system_fingerprint": generate_system_fingerprint(),
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"choices": [
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{
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"index": 0,
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"message": {
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"role": "assistant",
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"content": full_content
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},
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"finish_reason": "stop"
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}
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],
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"usage": {
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"prompt_tokens": prompt_tokens,
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"completion_tokens": completion_tokens,
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"total_tokens": total_tokens
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}
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})
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def generate_stream_response(response, model, prompt_tokens):
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"""生成流式 HTTP 响应。"""
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total_completion_tokens = 0
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for chunk in stream_notdiamond_response(response, model):
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content = chunk['choices'][0]['delta'].get('content', '')
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total_completion_tokens += count_tokens(content, model)
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chunk['usage'] = {
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"prompt_tokens": prompt_tokens,
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"completion_tokens": total_completion_tokens,
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"total_tokens": prompt_tokens + total_completion_tokens
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}
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yield f"data: {json.dumps(chunk)}\n\n"
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yield "data: [DONE]\n\n"
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