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
P粉2079697872023-09-08 00:06:27
csv_file = request.files['file'] # Load the CSV data into a DataFrame df = pd.read_csv(csv_file) final_data = [] # Initialize the web driver chrome_options = Options() chrome_options.add_argument("--headless") chrome_options.add_argument("--disable-gpu") driver = webdriver.Chrome(options=chrome_options) # Loop over the rows in the DataFrame and scrape each link for index, row in df.iterrows(): link = row['Link'] # Login to the website # Replace this with your own login code driver.get("https://example.com/login") username_field = driver.find_element_by_name("username") password_field = driver.find_element_by_name("password") username_field.send_keys("myusername") password_field.send_keys("mypassword") password_field.send_keys(Keys.RETURN) # Wait for the login to complete WebDriverWait(driver, 10).until(EC.url_changes("https://example.com/login")) # Scrape the website driver.get(link) 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