implementation of user friendly error message

app.py

@@ -10,11 +10,11 @@
 
 @app.route("/")
 def index():
- return redirect(url_for("input"))
+ return redirect(url_for("index.html"))
 
 @app.route("/input")
 def input():
- return render_template("index.html")
+ return render_template("input.html")
 
 #setting up backend to receive urls
 @app.route('/save_url', methods=['POST'])

error_handling.py

@@ -1,5 +1,5 @@
 
- import csv
+import csv
 import requests
 from requests.exceptions import RequestException
 import os

templates/input.html

@@ -4,14 +4,41 @@
 {% block content %}
  <div class="form-container">
  <h2>Input Webpage URLs</h2>
- <form action="" method="POST" class="input-form">
+ <form action="" method="POST" class="input-form" onsubmit="validateUrl(); return false;">
  <textarea rows="5" cols="60" name="url" placeholder="https://example.com/python-page"></textarea>
  <label for="depth">Depth of Scraping:</label>
  <input type="number" name="depth" value="1" min="1">
- </select>
  <button class="btn" type="submit">Scrape Data</button>
  </form>
  </div>
+ <script>
+ // Function to check if a URL is valid
+ function isValidUrl(url) {
+ // Regular expression for a more permissive URL validation
+ const urlRegex = /^(ftp|http|https):\/\/[^ "]+$/;
+
+ // Allow URLs without specifying the protocol
+ const urlWithoutProtocolRegex = /^[^ "]+\.[a-zA-Z]{2,}$/;
+
+ // Check if the URL matches either of the regular expressions
+ return urlRegex.test(url) || urlWithoutProtocolRegex.test(url);
+ }
+
+ // Function to validate the entered URL
+ function validateUrl() {
+ // Get the URL value from the input field
+ const userUrl = document.getElementsByName("url")[0].value;
+
+ // Check if the URL is valid
+ if (isValidUrl(userUrl)) {
+ // Display success message if the URL is valid
+ console.log("URL is valid. Proceed with the entered URL: " + userUrl);
+ } else {
+ // Display error message if the URL is not valid
+ alert("Hello dear user, the URL you just passed in isn't valid. Example of an appropriate URL is adorsys.com");
+ }
+ }
+ </script>
 {% endblock %}
 {% block title %}
  Input webpages URLs