Upload 5 files
Browse files- Dockerfile +29 -0
- README.md +4 -5
- entrypoint.sh +16 -0
- main.py +226 -0
- requirements.txt +9 -0
Dockerfile
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FROM python:3.11
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# 1. Install Ollama
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RUN curl -fsSL https://ollama.com/install.sh | sh
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# 2. User Setup
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RUN useradd -m -u 1000 user
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ENV USER=user
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ENV PATH="/home/user/.local/bin:$PATH"
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ENV HOME=/home/user
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ENV OLLAMA_KEEP_ALIVE=5m
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# 3. Workdir
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WORKDIR $HOME/app
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# 4. Switch User
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USER user
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# 5. Install Python Libs
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RUN pip install --no-cache-dir fastapi uvicorn ollama
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# 6. Copy Files
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COPY --chown=user . .
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# 7. Start Script Permission
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RUN chmod +x entrypoint.sh
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# 8. Ports
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EXPOSE 7860
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CMD ["./entrypoint.sh"]
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README.md
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---
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title:
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emoji:
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colorFrom:
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colorTo:
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sdk: docker
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pinned: false
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license: mit
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---
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Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
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---
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title: FreeAi
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emoji: 👁
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colorFrom: indigo
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colorTo: indigo
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sdk: docker
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pinned: false
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---
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Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
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entrypoint.sh
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#!/bin/bash
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pip install -r requirements.txt
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# 1. Ollama Server Start
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ollama serve &
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echo "Waiting for Ollama server..."
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sleep 5
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# 2. Qwen Model Pull
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# Note: Ye model bada hai, download hone mein 2-3 minute lag sakte hain
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echo "Pulling qwen2.5:3b..."
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ollama pull qwen2.5:3b
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# 3. FastAPI Start
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echo "Starting Public API..."
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uvicorn main:app --host 0.0.0.0 --port 7860
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main.py
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import os
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import logging
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import asyncio
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from typing import Annotated, TypedDict, List
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from contextlib import asynccontextmanager
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from fastapi import FastAPI
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from fastapi.responses import StreamingResponse
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from pydantic import BaseModel, Field
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# --- Async & Network ---
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import httpx
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# FIX: Use standard DDGS and asyncio for non-blocking execution
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from duckduckgo_search import DDGS
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from bs4 import BeautifulSoup
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# --- LangChain / AI Core ---
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from langchain_ollama import ChatOllama
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from langchain_core.messages import HumanMessage, SystemMessage, BaseMessage
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from langchain_core.tools import tool
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from langchain_core.prompts import ChatPromptTemplate
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# --- LangGraph (The Brain) ---
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from langgraph.graph import StateGraph, END, START
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from langgraph.prebuilt import ToolNode
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from langgraph.checkpoint.memory import MemorySaver
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# --------------------------------------------------------------------------------------
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# 1. Configuration & Global State
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# --------------------------------------------------------------------------------------
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logging.basicConfig(level=logging.INFO)
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logger = logging.getLogger("GenAI-Agent")
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# Model: Use a smart model suitable for tool calling (qwen2.5 or llama3.1)
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MODEL_NAME = "qwen2.5:3b"
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BASE_URL = "http://localhost:11434"
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# Global HTTP Client
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http_client = httpx.AsyncClient(timeout=15.0, follow_redirects=True)
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@asynccontextmanager
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async def lifespan(app: FastAPI):
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yield
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await http_client.aclose()
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app = FastAPI(title="GenAI Advanced Agent", version="2.1", lifespan=lifespan)
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# --------------------------------------------------------------------------------------
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# 2. Advanced Tools (Fixed for Latest DuckDuckGo)
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# --------------------------------------------------------------------------------------
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@tool
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async def web_search(query: str) -> str:
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"""
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Search the web for latest information, technical docs, or news.
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Returns top 5 results with snippets and URLs.
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"""
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# Helper function to run sync library in async environment
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def run_sync_search(q):
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try:
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with DDGS() as ddgs:
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# Latest version returns a list of dicts directly
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return list(ddgs.text(q, max_results=5))
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except Exception as e:
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return str(e)
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logger.info(f"🔎 Searching for: {query}")
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try:
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# Offload sync task to a separate thread to keep server fast
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results = await asyncio.to_thread(run_sync_search, query)
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if isinstance(results, str): # Check if error occurred
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return f"Search Error: {results}"
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if not results:
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return "No results found on the web."
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# Format cleanly for the LLM
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output = []
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for r in results:
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title = r.get('title', 'No Title')
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link = r.get('href', '#')
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body = r.get('body', '')
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output.append(f"Title: {title}\nLink: {link}\nSnippet: {body}\n---")
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return "\n".join(output)
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except Exception as e:
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return f"Search System Error: {str(e)}"
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@tool
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async def read_webpage(url: str) -> str:
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"""
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Reads the full content of a specific URL.
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Use this if the search snippet is not enough and you need deep technical details.
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"""
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logger.info(f"📖 Reading page: {url}")
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try:
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# User-Agent to avoid blocking
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headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64)"}
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resp = await http_client.get(url, headers=headers)
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if resp.status_code != 200:
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return f"Failed to load page: Status {resp.status_code}"
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soup = BeautifulSoup(resp.text, 'html.parser')
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# Clean up unnecessary tags
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for tag in soup(["script", "style", "nav", "footer", "svg"]):
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tag.decompose()
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text = soup.get_text(separator="\n")
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# Clean whitespace
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lines = (line.strip() for line in text.splitlines())
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chunks = (phrase.strip() for line in lines for phrase in line.split(" "))
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clean_text = '\n'.join(chunk for chunk in chunks if chunk)
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# Limit text length to avoid context overflow (approx 4000 chars)
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return clean_text[:4000] + "...(truncated)"
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except Exception as e:
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return f"Scraping Error: {str(e)}"
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tools = [web_search, read_webpage]
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# --------------------------------------------------------------------------------------
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# 3. LangGraph Agent Architecture (Reasoning Engine)
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# --------------------------------------------------------------------------------------
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class AgentState(TypedDict):
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messages: Annotated[List[BaseMessage], "add_messages"]
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# Initialize LLM with Tools
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llm = ChatOllama(
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model=MODEL_NAME,
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base_url=BASE_URL,
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temperature=0.3, # Lower temp for more precise code/facts
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keep_alive="1h"
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).bind_tools(tools)
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# System Prompt - Formatting & Behavior Rules
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SYSTEM_PROMPT = """You are an advanced GenAI technical assistant.
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CORE RULES:
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1. **Latest Info:** Always use 'web_search' for current events, libraries, or news. Do not guess.
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2. **Deep Dive:** If search snippets are too short, use 'read_webpage' to get full documentation/code.
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3. **Format:**
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- Start your response with a brief summary.
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| 147 |
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- Use headings (##) for sections.
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| 148 |
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- For code, ALWAYS use this XML format:
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| 149 |
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<code lang="python">
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| 150 |
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print("code here")
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</code>
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| 152 |
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- NEVER use markdown triple backticks (```) for code.
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| 153 |
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4. **Memory:** If the user asks "continue" or "more", check the previous conversation history.
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| 154 |
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Think step-by-step before answering.
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"""
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| 157 |
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| 158 |
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# Node: Agent (Decides what to do)
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| 159 |
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async def agent_node(state: AgentState):
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| 160 |
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messages = [SystemMessage(content=SYSTEM_PROMPT)] + state["messages"]
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| 161 |
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response = await llm.ainvoke(messages)
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| 162 |
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return {"messages": [response]}
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| 163 |
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| 164 |
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# Build Graph
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| 165 |
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workflow = StateGraph(AgentState)
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| 166 |
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workflow.add_node("agent", agent_node)
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| 167 |
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workflow.add_node("tools", ToolNode(tools))
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workflow.add_edge(START, "agent")
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| 170 |
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workflow.add_conditional_edges(
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"agent",
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lambda state: "tools" if state["messages"][-1].tool_calls else END
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)
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| 174 |
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workflow.add_edge("tools", "agent")
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| 175 |
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| 176 |
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# Memory (Checkpointer)
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| 177 |
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memory = MemorySaver()
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| 178 |
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app_graph = workflow.compile(checkpointer=memory)
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| 179 |
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| 180 |
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# --------------------------------------------------------------------------------------
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| 181 |
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# 4. API Handling & Streaming
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| 182 |
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# --------------------------------------------------------------------------------------
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| 183 |
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| 184 |
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class ChatRequest(BaseModel):
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| 185 |
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query: str
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| 186 |
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thread_id: str = Field(..., description="Unique ID for conversation (e.g., 'session-1')")
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| 187 |
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| 188 |
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async def event_generator(query: str, thread_id: str):
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| 189 |
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config = {"configurable": {"thread_id": thread_id}}
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| 190 |
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inputs = {"messages": [HumanMessage(content=query)]}
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| 191 |
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| 192 |
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yield "🤖 **GenAI Agent Initialized...**\n\n"
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| 193 |
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| 194 |
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try:
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async for event in app_graph.astream_events(inputs, config=config, version="v1"):
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| 196 |
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event_type = event["event"]
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| 197 |
+
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| 198 |
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# 1. Agent Thinking (Stream Tokens)
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| 199 |
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if event_type == "on_chat_model_stream":
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| 200 |
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chunk = event["data"]["chunk"].content
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| 201 |
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if chunk:
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| 202 |
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yield chunk
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| 203 |
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| 204 |
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# 2. Tool Start (Thinking Process)
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| 205 |
+
elif event_type == "on_tool_start":
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tool_name = event['name']
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| 207 |
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yield f"\n\n🤔 **Thinking:** Searching external sources using `{tool_name}`...\n\n"
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| 208 |
+
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| 209 |
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# 3. Tool End (Success)
|
| 210 |
+
elif event_type == "on_tool_end":
|
| 211 |
+
output = str(event['data'].get('output'))[:150] # Preview data
|
| 212 |
+
yield f"✅ **Data Found:** {output}...\n\n"
|
| 213 |
+
|
| 214 |
+
except Exception as e:
|
| 215 |
+
yield f"\n❌ **System Error:** {str(e)}"
|
| 216 |
+
|
| 217 |
+
@app.post("/chat")
|
| 218 |
+
async def chat_endpoint(req: ChatRequest):
|
| 219 |
+
return StreamingResponse(
|
| 220 |
+
event_generator(req.query, req.thread_id),
|
| 221 |
+
media_type="text/plain"
|
| 222 |
+
)
|
| 223 |
+
|
| 224 |
+
if __name__ == "__main__":
|
| 225 |
+
import uvicorn
|
| 226 |
+
uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)
|
requirements.txt
ADDED
|
@@ -0,0 +1,9 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
fastapi
|
| 2 |
+
uvicorn
|
| 3 |
+
httpx
|
| 4 |
+
duckduckgo-search
|
| 5 |
+
langchain-ollama
|
| 6 |
+
langchain-core
|
| 7 |
+
langgraph
|
| 8 |
+
beautifulsoup4
|
| 9 |
+
async-lru
|