Upload a CSV file containing the URLs from the HTML page and use Flask to read the URLs you want to crawl
I currently need to make a web-based system that can upload a CSV file containing a list of URLs. After uploading, the system will read the URL line by line and will be used for the next step of crawling. Here, crawling requires logging into the website before crawling. I already have the source code for the login website. However, the problem is that I want to connect an html page named "upload_page.html" with a flask file named "upload_csv.py". Where should the source code for login and scraping be placed in the flask file?
upload_page.html
<div class="upload">
<h2>Upload a CSV file</h2>
<form action="/upload" method="post" enctype="multipart/form-data">
<input type="file" name="file" accept=".csv">
<br>
<br>
<button type="submit">Upload</button>
</form>
</div>
upload_csv.py
from flask import Flask, request, render_template
import pandas as pd
import requests
from bs4 import BeautifulSoup
import csv
import json
import time
from time import sleep
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.chrome.options import Options
app = Flask(__name__)
@app.route('/')
def index():
return render_template('upload_page.html')
#Code for Login to the website
@app.route('/upload', methods=['POST'])
def upload():
# Read the uploaded file
csv_file = request.files['file']
# Load the CSV data into a DataFrameSS
df = pd.read_csv(csv_file)
final_data = []
# Loop over the rows in the DataFrame and scrape each link
for index, row in df.iterrows():
link = row['Link']
response = requests.get(link)
soup = BeautifulSoup(response.content, 'html.parser')
start = time.time()
# will be used in the while loop
initialScroll = 0
finalScroll = 1000
while True:
driver.execute_script(f"window.scrollTo({initialScroll},{finalScroll})")
# this command scrolls the window starting from the pixel value stored in the initialScroll
# variable to the pixel value stored at the finalScroll variable
initialScroll = finalScroll
finalScroll += 1000
# we will stop the script for 3 seconds so that the data can load
time.sleep(2)
end = time.time()
# We will scroll for 20 seconds.
if round(end - start) > 20:
break
src = driver.page_source
soup = BeautifulSoup(driver.page_source, 'html.parser')
# print(soup.prettify())
#Code to do scrape the website
return render_template('index.html', message='Scraped all data')
if __name__ == '__main__':
app.run(debug=True)
Are my login and crawling codes in the correct location? However, the encoding is not working and after I click the upload button it is not being processed
