From 777df6a6394ab6e077f773c16d636b5798cff84c Mon Sep 17 00:00:00 2001
From: AquibPy <mohdaquib31@gmail.com>
Date: Tue, 23 Apr 2024 14:16:17 +0530
Subject: [PATCH] ADDED: streaming response endpoint and chatbot endpoint

---
 api.py               | 22 +++++++++--
 helper_functions.py  | 30 +++++++++++++++
 templates/index.html | 92 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 140 insertions(+), 4 deletions(-)
 create mode 100644 templates/index.html

diff --git a/api.py b/api.py
index 09e9642..26c4530 100644
--- a/api.py
+++ b/api.py
@@ -1,7 +1,8 @@
 import os
-from fastapi import FastAPI,Form,File,UploadFile
+from fastapi import FastAPI,Form,File,UploadFile, Request
+from fastapi.templating import Jinja2Templates
 from fastapi.encoders import jsonable_encoder
-from fastapi.responses import JSONResponse,RedirectResponse
+from fastapi.responses import JSONResponse,RedirectResponse,StreamingResponse
 from typing import List,Optional
 from pydantic import BaseModel
 import google.generativeai as genai
@@ -10,7 +11,7 @@
 from mongo import MongoDB
 from helper_functions import get_qa_chain,get_gemini_response,get_url_doc_qa,extract_transcript_details,\
     get_gemini_response_health,get_gemini_pdf,read_sql_query,remove_substrings,questions_generator,groq_pdf,\
-    summarize_audio
+    summarize_audio,chatbot_send_message
 from langchain_groq import ChatGroq
 from langchain.chains import ConversationChain
 from langchain.chains.conversation.memory import ConversationBufferWindowMemory
@@ -19,6 +20,8 @@
 app = FastAPI(title="Genify By Mohd Aquib",
               summary="This API contains routes of different Gen AI usecases")
 
+templates = Jinja2Templates(directory="templates")
+
 app.allow_dangerous_deserialization = True
 
 app.add_middleware(
@@ -37,6 +40,11 @@ class ResponseText(BaseModel):
 async def home():
     return RedirectResponse("/docs")
 
+
+@app.get("/chatbot",description=" Talk to chatbot")
+async def chat(request: Request):
+    return templates.TemplateResponse("index.html", {"request": request})
+
 @app.post("/invoice_extractor",description="This route extracts information from invoices based on provided images and prompts.")
 async def gemini(image_file: UploadFile = File(...), prompt: str = Form(...)):
     image = image_file.file.read()
@@ -325,4 +333,10 @@ async def summarize_audio_endpoint(audio_file: UploadFile = File(...)):
         print(result)
         return ResponseText(response=summary_text)
     except Exception as e:
-        return {"error": str(e)}
\ No newline at end of file
+        return {"error": str(e)}
+    
+
+@app.post("/stream_chat",description="This route provide the data from LLM in the streaming response.")
+async def stream_chat(message: str = Form(...)):
+    generator = chatbot_send_message(message)
+    return StreamingResponse(generator, media_type="text/event-stream")
\ No newline at end of file
diff --git a/helper_functions.py b/helper_functions.py
index d9b94ce..8c22a47 100644
--- a/helper_functions.py
+++ b/helper_functions.py
@@ -21,6 +21,10 @@
 import sqlite3
 from langchain_community.embeddings import GooglePalmEmbeddings
 import tempfile
+from langchain.callbacks import AsyncIteratorCallbackHandler
+from typing import AsyncIterable
+import asyncio
+from langchain.schema import HumanMessage
 
 load_dotenv()
 genai.configure(api_key=os.getenv("GOOGLE_API_KEY"))
@@ -235,6 +239,32 @@ async def summarize_audio(audio_file):
 
     return response.text
 
+
+async def chatbot_send_message(content: str) -> AsyncIterable[str]:
+    callback = AsyncIteratorCallbackHandler()
+    model = ChatGroq(
+        temperature=0, 
+        groq_api_key=os.environ['GROQ_API_KEY'], 
+        model_name="llama3-70b-8192",
+        streaming=True,
+        verbose=True,
+        callbacks=[callback],
+    )
+
+    task = asyncio.create_task(
+        model.agenerate(messages=[[HumanMessage(content=content)]])
+    )
+
+    try:
+        async for token in callback.aiter():
+            yield token
+    except Exception as e:
+        print(f"Caught exception: {e}")
+    finally:
+        callback.done.set()
+
+    await task
+
 if __name__ == "__main__":
     create_vector_db()
     chain = get_qa_chain()
diff --git a/templates/index.html b/templates/index.html
new file mode 100644
index 0000000..e9ecadd
--- /dev/null
+++ b/templates/index.html
@@ -0,0 +1,92 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+    <style>
+        body {
+            font-family: Arial, sans-serif;
+            margin: 0;
+            padding: 0;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            height: 100vh;
+            background-color: #f2f2f2;
+        }
+
+        .chat-container {
+            border-radius: 5px;
+            background-color: white;
+            padding: 20px;
+            max-width: 500px;
+            width: 100%;
+            box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
+        }
+
+        #result {
+            height: 400px;
+            overflow-y: auto;
+            border: 1px solid #ccc;
+            padding: 10px;
+            margin-bottom: 10px;
+        }
+
+        #message {
+            width: 70%;
+            padding: 10px;
+            margin-right: 10px;
+            border-radius: 5px;
+            border: 1px solid #ccc;
+        }
+
+        button {
+            padding: 10px 20px;
+            border: none;
+            border-radius: 5px;
+            background-color: #007BFF;
+            color: white;
+        }
+    </style>
+</head>
+
+<body>
+
+    <div class="chat-container">
+        <h1>Chat with AI</h1>
+        <div id="result"></div>
+
+        <input type="text" id="message" placeholder="Type your message here">
+        <button onclick="sendMessage()">Send Message</button>
+    </div>
+
+    <script>
+        async function sendMessage() {
+            var message = document.getElementById("message").value;
+            var response = await fetch('http://localhost:8000/stream_chat', {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/x-www-form-urlencoded' // Set the content type to URL-encoded form data
+                },
+                body: 'message=' + encodeURIComponent(message) // Encode the message and send it as a form parameter
+            });
+
+            var reader = response.body.getReader();
+            var decoder = new TextDecoder('utf-8');
+
+            reader.read().then(function processResult(result) {
+                if (result.done) return;
+                let token = decoder.decode(result.value);
+                if (token.endsWith('.') || token.endsWith('!') || token.endsWith('?')) {
+                    document.getElementById("result").innerHTML += token + "<br>";
+                } else {
+                    document.getElementById("result").innerHTML += token + ' ';
+                }
+                return reader.read().then(processResult);
+            });
+        }
+
+    </script>
+
+</body>
+
+</html>
\ No newline at end of file