server.py

from flask import Flask, request, jsonify
from summarizer import Summarizer
from flask_cors import CORS
from PyPDF2 import PdfReader
from transformers import BartForConditionalGeneration, BartTokenizer, PegasusForConditionalGeneration, PegasusTokenizer

app = Flask(__name__)
CORS(app)

bert_model = Summarizer()
model = BartForConditionalGeneration.from_pretrained('facebook/bart-large-cnn')
tokenizer = BartTokenizer.from_pretrained('facebook/bart-large-cnn')
@app.route('/', methods = ['GET', 'POST']) 
def home(): 
    if(request.method == 'GET'): 
  
        data = "hello world"
        return jsonify({'data': data})
        
@app.route('/summarize', methods=['POST'])
def summarize():
    if 'file' not in request.files:
        return jsonify({'error': 'No file part'})

    file = request.files['file']
    if file.filename == '':
        return jsonify({'error': 'No selected file'})

    pdf_reader = PdfReader(file)
    text = ''
    for page in pdf_reader.pages:
        text += page.extract_text() 
    
    inputs = tokenizer.encode(text, return_tensors="pt", max_length=1024, truncation=True)
    summary_ids = model.generate(inputs, num_beams=4, min_length=50, max_length=400, early_stopping=True)
    summary = tokenizer.decode(summary_ids[0], skip_special_tokens=True)
    return summary

def bert_summarize(text):
    return ''.join(bert_model(text, min_length=100, max_length=1000))

if __name__ == '__main__':
    app.run(host= '0.0.0.0',port=8080)