My flask app is fetching data from third party API , while deploying this app on EC2 , its getting hanged

Question

app.py is running fine , on ubuntu EC2 virtual machine .

But , when I run it with EC2 DCN , its keep on loading , doesn't show any output.

flask import jsonify, Flask
import requests
import json
import pandas as pd
from flask import Flask, render_template

app = Flask(__name__,template_folder='template')

@app.route('/')
def index():
    page = requests.get('https://www.nseindia.com/api/option-chain-indices?symbol=NIFTY' , headers = {'User-Agent': 'Mozilla/5.0'})
    page=json.loads(page.text)
    ce_values = [data['CE'] for data in page['records']['data'] if "CE" in data and data['expiryDate'] == "11-Feb-2021"]
    ce_dt = pd.DataFrame(ce_values).sort_values(['strikePrice'])
    return render_template('simple_VPS.html',  tables=[ce_dt.to_html(classes='data', header="true")])

Any solutions ?

question from:https://stackoverflow.com/questions/65952524/my-flask-app-is-fetching-data-from-third-party-api-while-deploying-this-app-on

Answer 1

nseindia is blocking requests originating from AWS and other main cloud providers. It is an issue know for a few years now.

You can check with nseindia if they offer some subscription plans which would allow you to whitelist your IPs from AWS. Otherwise, don't use AWS to access them.