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app.py
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"""
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Claude Web API Proxy - HuggingFace Spaces with ReAct
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"""
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from fastapi import FastAPI, Request
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from fastapi.responses import StreamingResponse, JSONResponse
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from fastapi.middleware.cors import CORSMiddleware
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import httpx
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import json
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import asyncio
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from datetime import datetime
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from typing import Optional, Dict
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import os
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import uuid
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import re
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import pickle
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from pathlib import Path
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import logging
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# 日志配置
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logging.basicConfig(level=logging.INFO, format='%(asctime)s [%(levelname)s] %(message)s')
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logger = logging.getLogger(__name__)
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# 重试函数
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async def retry_async(fn, max_retries=3, delay=1.0):
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for i in range(max_retries):
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try:
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return await fn()
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except Exception as e:
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if i == max_retries - 1:
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raise
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logger.warning(f"Retry {i+1}/{max_retries}: {e}")
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await asyncio.sleep(delay * (i + 1))
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app = FastAPI(title="Claude Proxy")
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app.add_middleware(CORSMiddleware, allow_origins=["*"], allow_methods=["*"], allow_headers=["*"])
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# 文件持久化
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CACHE_FILE = Path("/tmp/conversation_cache.pkl")
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conversation_cache: Dict[str, str] = {}
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def load_cache():
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global conversation_cache
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if CACHE_FILE.exists():
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try:
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with open(CACHE_FILE, 'rb') as f:
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conversation_cache = pickle.load(f)
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except:
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conversation_cache = {}
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def save_cache():
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try:
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with open(CACHE_FILE, 'wb') as f:
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pickle.dump(conversation_cache, f)
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except:
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pass
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# 智能保活
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last_request_time = datetime.now()
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async def keep_alive():
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while True:
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# 根据最后请求时间动态调整保活间隔
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idle_time = (datetime.now() - last_request_time).total_seconds()
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if idle_time < 3600: # 1小时内有请求,频繁保活
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await asyncio.sleep(1800) # 30分钟
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else: # 空闲,降低频率
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await asyncio.sleep(6 * 3600) # 6小时
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try:
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async with httpx.AsyncClient() as client:
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url = os.getenv("SPACE_URL", "")
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if url:
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await client.get(f"{url}/health")
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except:
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pass
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@app.on_event("startup")
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async def startup():
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load_cache()
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asyncio.create_task(keep_alive())
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@app.get("/health")
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async def health():
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return {"status": "ok", "time": datetime.now().isoformat()}
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@app.get("/")
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async def root():
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return {"name": "Claude Proxy", "version": "2.0-hf-react"}
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async def get_org_id(key: str) -> Optional[str]:
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try:
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async with httpx.AsyncClient() as client:
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r = await client.get('https://claude.ai/api/organizations',
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headers={'Cookie': f'sessionKey={key}', 'User-Agent': 'Mozilla/5.0'}, timeout=30.0)
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if r.status_code == 200:
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data = r.json()
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return data[0]['uuid'] if data else None
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except:
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pass
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return None
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async def create_conv(key: str, org_id: str) -> Optional[str]:
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try:
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conv_id = str(uuid.uuid4())
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async with httpx.AsyncClient() as client:
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r = await client.post(f'https://claude.ai/api/organizations/{org_id}/chat_conversations',
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headers={'Content-Type': 'application/json', 'Cookie': f'sessionKey={key}', 'User-Agent': 'Mozilla/5.0'},
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json={'uuid': conv_id, 'name': '', 'include_conversation_preferences': True}, timeout=30.0)
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if r.status_code == 200:
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return r.json().get('uuid', conv_id)
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except:
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pass
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return None
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def extract_prompt(messages):
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result = []
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for m in messages:
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role = m['role'].title()
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content = m['content']
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# 支持图片
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if isinstance(content, list):
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parts = []
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for part in content:
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if part.get('type') == 'text':
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parts.append(part['text'])
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elif part.get('type') == 'image_url':
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parts.append(f"[Image: {part['image_url']['url']}]")
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result.append(f"{role}: {' '.join(parts)}")
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else:
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result.append(f"{role}: {content}")
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return '\n\n'.join(result)
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def extract_attachments(messages):
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attachments = []
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for m in messages:
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if isinstance(m['content'], list):
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for part in m['content']:
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if part.get('type') == 'image_url':
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attachments.append({
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'extracted_content': '',
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'file_name': 'image.png',
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'file_size': 0,
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'file_type': 'image/png',
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'url': part['image_url']['url']
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})
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return attachments
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def enhance_prompt(prompt: str, messages: list) -> str:
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has_system = any(m['role'] == 'system' for m in messages)
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if not has_system:
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return prompt
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return prompt + "\n\n[Environment: OpenClaw | Tools: web_search, artifacts, repl available]"
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def inject_react_prompt(prompt: str, tools: list) -> str:
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if not tools:
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return prompt
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tool_defs = '\n\n'.join([f"{t['name']}: {t.get('description', '')}" for t in tools])
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return prompt + f"""
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[Tool Calling Protocol]
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You have access to these tools:
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{tool_defs}
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Use this format:
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Thought: [reasoning]
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Action: [tool_name]
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Action Input: [JSON]
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After result:
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Observation: [result]
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When done:
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Final Answer: [response]
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"""
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def parse_react_output(text: str) -> Optional[dict]:
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action_match = re.search(r'Action:\s*(\w+)', text)
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input_match = re.search(r'Action Input:\s*(\{[^}]*\})', text)
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if action_match and input_match:
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try:
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return {'type': 'tool_use', 'id': f'tool_{int(datetime.now().timestamp())}',
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'name': action_match.group(1), 'input': json.loads(input_match.group(1))}
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except:
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return None
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return None
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@app.post("/v1/chat/completions")
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async def chat(request: Request):
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global last_request_time
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last_request_time = datetime.now()
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start_time = datetime.now()
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try:
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body = await request.json()
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auth = request.headers.get('Authorization', '')
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logger.info(f"Request received: model={body.get('model', 'claude-sonnet-4-6')}")
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if not auth.startswith('Bearer '):
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return JSONResponse({"error": {"message": "Missing auth", "type": "auth_error"}}, 401)
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key = auth.replace('Bearer ', '')
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org_id = await retry_async(lambda: get_org_id(key))
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if not org_id:
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logger.error("Invalid sessionKey")
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return JSONResponse({"error": {"message": "Invalid key", "type": "auth_error"}}, 401)
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conv_id = conversation_cache.get(key)
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if not conv_id:
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conv_id = await retry_async(lambda: create_conv(key, org_id))
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if conv_id:
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conversation_cache[key] = conv_id
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save_cache()
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if not conv_id:
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logger.error("Failed to create conversation")
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return JSONResponse({"error": {"message": "Conv error", "type": "api_error"}}, 500)
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messages = body.get('messages', [])
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tools = body.get('tools', [])
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prompt = extract_prompt(messages)
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prompt = enhance_prompt(prompt, messages)
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if tools:
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prompt = inject_react_prompt(prompt, tools)
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attachments = extract_attachments(messages)
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model = body.get('model', 'claude-sonnet-4-6')
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payload = {
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'prompt': prompt,
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'timezone': body.get('timezone', 'Asia/Shanghai'),
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'locale': body.get('locale', 'zh-CN'),
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'model': model,
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'rendering_mode': 'messages',
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'attachments': attachments,
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'files': [],
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'tools': [
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{"type": "web_search_v0", "name": "web_search"},
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{"type": "artifacts_v0", "name": "artifacts"},
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{"type": "repl_v0", "name": "repl"}
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]
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}
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logger.info(f"Sending to Claude: attachments={len(attachments)}")
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async def generate():
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try:
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full_text = ''
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async with httpx.AsyncClient() as client:
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async with client.stream('POST',
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f'https://claude.ai/api/organizations/{org_id}/chat_conversations/{conv_id}/completion',
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headers={'Content-Type': 'application/json', 'Cookie': f'sessionKey={key}', 'User-Agent': 'Mozilla/5.0'},
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json=payload, timeout=120.0) as response:
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async for line in response.aiter_lines():
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if line.startswith('data: '):
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try:
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data = json.loads(line[6:])
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if data.get('type') == 'content_block_delta' and data.get('delta', {}).get('text'):
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text = data['delta']['text']
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full_text += text
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# ReAct: 检测工具调用
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react_result = parse_react_output(full_text)
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if react_result and react_result['type'] == 'tool_use':
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chunk = {
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"id": f"chatcmpl-{int(datetime.now().timestamp())}",
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"object": "chat.completion.chunk",
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"created": int(datetime.now().timestamp()),
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"model": model,
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"choices": [{
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"index": 0,
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"delta": {
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"tool_calls": [{
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"id": react_result['id'],
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"type": "function",
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"function": {
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"name": react_result['name'],
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"arguments": json.dumps(react_result['input'])
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}
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}]
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},
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"finish_reason": "tool_calls"
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}]
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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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return
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# 正常文本
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chunk = {
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"id": f"chatcmpl-{int(datetime.now().timestamp())}",
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"object": "chat.completion.chunk",
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"created": int(datetime.now().timestamp()),
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"model": model,
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"choices": [{"index": 0, "delta": {"content": text}, "finish_reason": None}]
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}
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yield f"data: {json.dumps(chunk)}\n\n"
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except:
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pass
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yield "data: [DONE]\n\n"
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except Exception as e:
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logger.error(f"Stream error: {e}")
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yield f"data: {json.dumps({'error': str(e)})}\n\n"
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return StreamingResponse(generate(), media_type="text/event-stream")
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except Exception as e:
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duration = (datetime.now() - start_time).total_seconds()
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logger.error(f"Request failed: {e}, duration={duration}s")
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return JSONResponse({"error": {"message": str(e), "type": "api_error"}}, 500)
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