Delete app.py
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app.py
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import os, json, asyncio
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from fastapi import FastAPI, Request, HTTPException
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from fastapi.responses import StreamingResponse
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from fastapi.middleware.cors import CORSMiddleware
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from huggingface_hub import hf_hub_download
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from llama_cpp import Llama
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from prompts import build_system_prompt
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from search_engine import search_web
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app = FastAPI()
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app.add_middleware(CORSMiddleware, allow_origins=["*"], allow_methods=["*"], allow_headers=["*"])
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MODEL_REPO = "unsloth/Qwen3.6-35B-A3B-GGUF"
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MODEL_FILE = "Qwen3.6-35B-A3B-UD-Q3_K_XL.gguf"
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llm = None
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def load_model():
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global llm
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if llm is None:
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print("⬇️ جاري تحميل النموذج...")
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model_path = hf_hub_download(repo_id=MODEL_REPO, filename=MODEL_FILE)
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llm = Llama(
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model_path=model_path,
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n_ctx=2048, # متوازن مع 18GB RAM (يمكن رفعه لـ 3076 إذا توفرت رامات إضافية)
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n_threads=4,
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n_gpu_layers=0,
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use_mmap=True,
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verbose=False
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)
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print("✅ تم تحميل النموذج بنجاح.")
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@app.on_event("startup")
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def startup():
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load_model()
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def format_qwen_chat(messages: list, system_prompt: str) -> str:
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"""بناء قالب محادثة Qwen3 الصحيح مع حفظ السياق"""
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prompt = f"<|im_start|>system\n{system_prompt}<|im_end|>\n"
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# نحتفظ بآخر 5 رسائل فقط لتوفير سياق الذاكرة على السيرفر المجاني
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history = messages[-5:] if len(messages) > 5 else messages
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for msg in history:
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role = "user" if msg["role"] == "user" else "assistant"
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prompt += f"<|im_start|>{role}\n{msg['content']}<|im_end|>\n"
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prompt += "<|im_start|>assistant\n"
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return prompt
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async def generate_stream(messages: list, mode: str):
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system_prompt = build_system_prompt(mode)
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# وضع البحث: حقن النتائج بتعليمات واضحة
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if mode == "search":
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query = messages[-1]['content']
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search_res = search_web(query)
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# نضيف النتائج كرسالة نظام قبل آخر رسالة مستخدم
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messages = messages.copy()
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messages.insert(-1, {"role": "system", "content": f"[SEARCH RESULTS]\n{search_res}\n\nINSTRUCTION: Use the above results to answer accurately. If irrelevant, rely on your knowledge."})
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prompt = format_qwen_chat(messages, system_prompt)
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# إعدادات توليد محسنة لنماذج MoE الكبيرة
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for token in llm(
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prompt,
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max_tokens=2048,
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stop=["<|im_end|>", "<|user|>"],
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stream=True,
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temperature=0.7,
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repeat_penalty=1.1, # منع التكرار
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top_p=0.9
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):
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yield json.dumps({"token": token["choices"][0]["text"]}) + "\n"
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await asyncio.sleep(0.01)
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@app.post("/v1/chat/completions")
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async def chat_completions(request: Request):
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data = await request.json()
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messages = data.get("messages", [])
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mode = data.get("mode", "chat")
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if not messages:
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raise HTTPException(400, "No messages provided")
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return StreamingResponse(generate_stream(messages, mode), media_type="application/json")
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@app.get("/health")
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def health():
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return {"status": "ok", "model": MODEL_FILE}
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