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In Perl, regular expressions (regex) are a powerful tool for parsing and manipulating text. Below is a basic example of using Perl regex to parse text. Please note that the regex patterns and the parsing logic depend on the specific structure of your text data.

Let's assume you have a simple text string with information about people, and you want to extract names and ages. Here's an example:

use strict;
use warnings;

my $text = "John Doe, age 30; Jane Smith, age 25; Bob Johnson, age 40";

# Define a regex pattern to match names and ages
my $pattern = qr/(\w+\s+\w+),\s+age\s+(\d+)/;

# Use the regex pattern to extract information
while ($text =~ /$pattern/g) {
    my $name = $1;
    my $age = $2;
    print "Name: $name, Age: $age\n";
}

In this example:

• The text contains information about people, where each entry is separated by a semicolon.

• The regex pattern (\w+\s+\w+),\s+age\s+(\d+) is used to match names and ages. Breaking down the pattern:

  • (\w+\s+\w+): Matches names consisting of one or more word characters (letters, digits, underscores) separated by whitespace.
  • ,: Matches the comma separating the name and age.
  • \s+age\s+: Matches the string "age" surrounded by whitespace.
  • (\d+): Matches one or more digits representing the age.

• The while ($text =~ /$pattern/g) loop iterates through matches found in the text.

• Inside the loop, $1 and $2 capture the matched name and age, respectively.

When using Selenium for automation, it's important to be aware that websites can detect automation and may have measures in place to identify bot-like behavior. Some websites employ techniques to detect whether a user is interacting with the site through a web browser or through automated scripts like Selenium.

While it's not recommended to hide the fact that you are using Selenium, there are strategies you can employ to make your automation less detectable. Keep in mind that attempting to hide automation might violate the terms of service of certain websites, and it's important to respect the policies of the websites you are interacting with.

Here are some strategies to make your Selenium automation less detectable

1. Use Headless Mode

Running the browser in headless mode means it operates without a graphical user interface. This can make your automation less conspicuous. However, be aware that some websites can still detect headless browsers.

from selenium import webdriver

options = webdriver.ChromeOptions()
options.add_argument('--headless')

driver = webdriver.Chrome(options=options)

2. Modify User Agent

Change the user agent to simulate different browsers or devices. This can make your requests look more like those coming from real users.

from selenium import webdriver

options = webdriver.ChromeOptions()
options.add_argument('--user-agent=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36')

driver = webdriver.Chrome(options=options)

3. Slow Down Interactions

Introduce delays between your interactions to mimic more human-like behavior. Websites might detect automation based on rapid, sequential requests.

import time

# Introduce a delay
time.sleep(2)

4. Randomize Interactions

Add randomization to your script, such as randomizing wait times, order of interactions, or the number of interactions. This can make your script less predictable.

import random

# Randomize wait time
time.sleep(random.uniform(1, 3))

5. Handle Cookies and Sessions

Manage cookies and sessions effectively to simulate real user behavior. Log in, handle sessions, and manage cookies as a real user would.

6. Avoid Common Automation Detection Techniques

Be aware of common techniques websites use to detect automation, such as checking for the presence of WebDriver properties. You may need to work around these checks or use techniques to override them.

Please note that while these strategies may make your Selenium automation less detectable, they may not guarantee complete invisibility. Websites can employ sophisticated methods to detect automation, and attempting to bypass detection mechanisms might violate the terms of service of the website.

Error 500 usually indicates an internal server error. When you're getting this error while querying /wd/hub/sessions to Docker Selenium, it might be due to several reasons. Here are some steps you can take to troubleshoot and resolve the issue:

Check logs: Inspect the logs of the Selenium server container to get more information about the error. You can do this by running the following command:

docker logs 

Replace with the actual name or ID of your Selenium server container.

Verify configuration: Ensure that your Selenium server configuration is correct. Make sure that the hub and node containers are properly set up and can communicate with each other. Check the port mappings and network settings.

Update versions: Make sure you are using compatible versions of Selenium server, WebDriver, and any other related libraries or tools. Sometimes, compatibility issues can cause unexpected errors.

Resource constraints: Check if your system has enough resources (CPU, memory, and disk space) to run the Selenium server and nodes. If your system is running out of resources, it might cause the server to return an error.

Firewall or network issues: Ensure that there are no firewall rules or network configurations that might be blocking the communication between the hub and node containers.

Restart containers: If none of the above steps help, try restarting the Selenium server and node containers. This can sometimes resolve temporary issues.

If you continue to face the issue, please provide more information about your setup, including the versions of Selenium server, WebDriver, and any other related libraries or tools you are using. This will help in providing more specific guidance to resolve the issue.

To assign a proxy server to an Android or iOS access point, follow these steps:

Open the "Settings" section. Go to the "Wi-Fi" tab. Select your access point. Click on "Proxy". Use manual setup and specify the data of proxy. Save the settings.

On smartphones, when a proxy is turned on, the corresponding indicator (the "VPN" icon) appears in the status bar. In Windows you have to go to "Settings", open "Network and Internet". Under "Proxy Server", if the item "Manual" is activated, it means that the proxy is engaged right now.