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b01addc 8846a62 b01addc 8846a62 b01addc | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 | import os
import shutil
import tempfile
from contextlib import asynccontextmanager
from typing import Annotated
from dotenv import dotenv_values
from fastapi import FastAPI, File, Form, HTTPException, UploadFile
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
from helpers import (
generate_embedding_doc,
get_text_from_pdf,
run_rag_pipeline,
split_doc_chunks,
)
# --------------------------------------------------
# CONFIG
# --------------------------------------------------
config = dotenv_values(".env")
GROQ_API_KEY = config.get(
"GROQ_API_KEY",
os.getenv("GROQ_API_KEY", "")
)
if not GROQ_API_KEY:
raise RuntimeError("Missing GROQ_API_KEY")
# --------------------------------------------------
# SIMPLE LIST STORAGE: I Don't Use Chroma DB --> Deployment Causes
# --------------------------------------------------
chunked_documents = []
# --------------------------------------------------
# FASTAPI
# --------------------------------------------------
@asynccontextmanager
async def lifespan(app: FastAPI):
print("API Started")
yield
print("API Stopped")
app = FastAPI(
title="Simple RAG API",
lifespan=lifespan,
)
app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_methods=["*"],
allow_headers=["*"],
)
# --------------------------------------------------
# SCHEMAS
# --------------------------------------------------
class QueryRequest(BaseModel):
question: str
top_k: int = 5
rerank_top_k: int = 3
# --------------------------------------------------
# ROUTES
# --------------------------------------------------
@app.get("/")
def home():
return {
"message": "RAG API Running"
}
# --------------------------------------------------
# UPLOAD PDF
# --------------------------------------------------
@app.post("/upload-pdf")
async def upload_pdf(
file: Annotated[
UploadFile,
File(description="PDF file")
],
):
print("FILE SEND: ", file)
global chunked_documents
# -------------------------------
# CHECK PDF
# -------------------------------
if not file.filename.endswith(".pdf"):
raise HTTPException(
status_code=400,
detail="Only PDF allowed"
)
# -------------------------------
# SAVE TEMP PDF
# -------------------------------
with tempfile.NamedTemporaryFile(
delete=False,
suffix=".pdf"
) as tmp:
shutil.copyfileobj(file.file, tmp)
tmp_path = tmp.name
try:
# -------------------------------
# EXTRACT TEXT
# -------------------------------
documents = get_text_from_pdf(tmp_path)
if not documents:
raise HTTPException(
status_code=400,
detail="No text found"
)
# -------------------------------
# CHUNKING
# -------------------------------
chunked_documents = split_doc_chunks(
documents
)
# -------------------------------
# GENERATE EMBEDDINGS
# -------------------------------
chunked_documents = generate_embedding_doc(
chunked_documents
)
return {
"message": "PDF indexed successfully",
"chunks": len(chunked_documents)
}
finally:
os.unlink(tmp_path)
# --------------------------------------------------
# QUERY
# --------------------------------------------------
@app.post("/query")
def query(req: QueryRequest):
global chunked_documents
print("Question", req)
if not chunked_documents:
raise HTTPException(
status_code=400,
detail="Upload PDF first"
)
answer = run_rag_pipeline(
question=req.question,
chunked_documents=chunked_documents,
groq_api_key=GROQ_API_KEY,
top_k=req.top_k,
rerank_top_k=req.rerank_top_k,
)
return {
"question": req.question,
"answer": answer,
}
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