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import logging
from fastapi import FastAPI, File, UploadFile, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from paddleocr import PaddleOCR
from doctr.io import DocumentFile
from doctr.models import ocr_predictor
import numpy as np
from PIL import Image
import io
# Set up logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)
app = FastAPI()
app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
# Initialize models once at startup
ocr_model = ocr_predictor(pretrained=True)
paddle_ocr = PaddleOCR(lang='en', use_angle_cls=True)
def ocr_with_doctr(file):
text_output = ''
try:
logger.info("Processing PDF with Doctr...")
doc = DocumentFile.from_pdf(file)
result = ocr_model(doc)
for page in result.pages:
for block in page.blocks:
for line in block.lines:
text_output += " ".join([word.value for word in line.words]) + "\n"
except Exception as e:
logger.error(f"Error processing PDF: {e}")
raise HTTPException(status_code=500, detail=f"Error processing PDF: {e}")
return text_output
def ocr_with_paddle(img):
finaltext = ''
try:
logger.info("Processing image with PaddleOCR...")
result = paddle_ocr.ocr(img)
for i in range(len(result[0])):
text = result[0][i][1][0]
finaltext += ' ' + text
except Exception as e:
logger.error(f"Error processing image: {e}")
raise HTTPException(status_code=500, detail=f"Error processing image: {e}")
return finaltext
@app.post("/ocr/")
async def perform_ocr(file: UploadFile = File(...)):
try:
logger.info(f"Received file: {file.filename}")
file_bytes = await file.read()
if file.filename.endswith('.pdf'):
logger.info("Detected PDF file")
text_output = ocr_with_doctr(io.BytesIO(file_bytes))
else:
logger.info("Detected image file")
img = np.array(Image.open(io.BytesIO(file_bytes)))
text_output = ocr_with_paddle(img)
logger.info("OCR completed successfully")
return {"ocr_text": text_output}
except Exception as e:
logger.error(f"Internal server error: {e}")
raise HTTPException(status_code=500, detail=f"Internal server error: {e}")
@app.get("/test/")
async def test_call():
return {"message": "Hi. I'm running"}
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