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import io
from fastapi import FastAPI, File, UploadFile, HTTPException
from fastapi.responses import JSONResponse
from fastapi.middleware.cors import CORSMiddleware
from pypdf import PdfReader
import uvicorn
# --- Initialize the FastAPI app ---
app = FastAPI(
title="PDF Text Extractor API",
description="An API that uses PyPDF to extract text from PDF files.",
version="1.0.0"
)
# --- Configure CORS ---
# Allows your frontend web page to communicate with this API.
origins = [
"https://clarifyai.pages.dev", # Your production frontend
"http://127.0.0.1:5500", # Local development server
"http://localhost:5500",
"*" # In development, a wildcard can be useful. For production, be more specific.
]
app.add_middleware(
CORSMiddleware,
allow_origins=origins,
allow_credentials=True,
allow_methods=["*"], # Allows all methods (GET, POST, etc.)
allow_headers=["*"], # Allows all headers
)
# --- Define the API Endpoint ---
@app.post("/extract-text")
async def extract_text_from_pdf(file: UploadFile = File(...)):
"""
Accepts a PDF file, extracts its text content using PyPDF, and returns it.
"""
# Ensure the uploaded file is a PDF
if file.content_type != "application/pdf":
raise HTTPException(status_code=400, detail="Invalid file type. Please upload a PDF.")
try:
# Read the uploaded file into an in-memory stream
pdf_stream = io.BytesIO(await file.read())
# --- PyPDF LOGIC START ---
reader = PdfReader(pdf_stream)
full_text = []
for page in reader.pages:
text = page.extract_text()
if text:
full_text.append(text.strip())
if not full_text:
final_text = "No text could be extracted. The PDF might be image-based or empty."
else:
final_text = "\n\n---\n\n".join(full_text)
# --- PyPDF LOGIC END ---
# Return the extracted text in a JSON response
return JSONResponse(content={"text": final_text})
except Exception as e:
# Handle potential errors during PDF processing
print(f"An error occurred during PDF processing: {e}")
raise HTTPException(status_code=500, detail=f"Failed to process PDF file: {str(e)}")
# A simple root endpoint to confirm the server is running
@app.get("/")
def read_root():
return {"status": "PDF PyPDF extraction service is running."}
# This part is for local development, Hugging Face Spaces will use its own server.
if __name__ == "__main__":
uvicorn.run(app, host="0.0.0.0", port=8000) |