DNS HTTP Proxy

Audience parsing is the collection of information about users. Most often it is used to get statistical data, to check the server capacity. Sometimes it is also used to compile a database of potential customers.

To quickly scrape a large number of sites using Node.js, you can leverage asynchronous programming and utilize libraries like axios for making HTTP requests and cheerio for parsing HTML. Additionally, you may consider using the p-queue library to manage the concurrency and control the rate of requests. Here's a basic example to get you started

Install Required Packages:

npm install axios cheerio p-queue

Create a Scraper Script:

const axios = require('axios');
const cheerio = require('cheerio');
const PQueue = require('p-queue');

// List of sites to scrape
const sites = [
  'https://example1.com',
  'https://example2.com',
  // Add more URLs as needed
];

// Set the concurrency level (adjust as needed)
const concurrency = 5;

// Initialize a queue with concurrency control
const queue = new PQueue({ concurrency });

// Function to scrape a single site
async function scrapeSite(url) {
  try {
    const response = await axios.get(url);
    const $ = cheerio.load(response.data);

    // Use Cheerio to parse and extract data
    const title = $('title').text();
    console.log(`Scraped ${url} - Title: ${title}`);
  } catch (error) {
    console.error(`Error scraping ${url}: ${error.message}`);
  }
}

// Enqueue scraping tasks for each site
sites.forEach((site) => {
  queue.add(() => scrapeSite(site));
});

// Wait for all tasks to complete
queue.onIdle().then(() => {
  console.log('All scraping tasks completed.');
});

This example uses axios for making HTTP requests, cheerio for HTML parsing, and p-queue for controlling concurrency.

Run the Script:

node your_scraper_script.js

Adjust the sites array with the URLs you want to scrape.

This example uses a simple queue system to control the number of concurrent requests, preventing potential issues with rate limiting or overwhelming the target websites. However, be mindful of the websites' terms of service and robots.txt rules to avoid scraping restrictions.

When scraping a website and encountering a 307 redirect, it means that the server is temporarily redirecting the request to another URL. To handle this in your scraping code, you'll need to follow the redirect. Below is an example using C# with the HttpClient class:

using System;
using System.Net.Http;
using System.Threading.Tasks;

class Program
{
    static async Task Main()
    {
        string url = "https://example.com";
        using (HttpClient client = new HttpClient())
        {
            HttpResponseMessage response = await client.GetAsync(url);

            if (response.StatusCode == System.Net.HttpStatusCode.OK)
            {
                string content = await response.Content.ReadAsStringAsync();
                // Process the content as needed
                Console.WriteLine(content);
            }
            else if (response.StatusCode == System.Net.HttpStatusCode.TemporaryRedirect) // 307
            {
                Uri redirectUri = response.Headers.Location;

                // Follow the redirect
                HttpResponseMessage redirectResponse = await client.GetAsync(redirectUri);

                if (redirectResponse.StatusCode == System.Net.HttpStatusCode.OK)
                {
                    string content = await redirectResponse.Content.ReadAsStringAsync();
                    // Process the content after following the redirect
                    Console.WriteLine(content);
                }
                else
                {
                    Console.WriteLine($"Error after following redirect: {redirectResponse.StatusCode}");
                }
            }
            else
            {
                Console.WriteLine($"Error: {response.StatusCode}");
            }
        }
    }
}

In this example:

1. The initial request is made to the specified URL using client.GetAsync(url).
2. If the status code is OK (200), you can process the content.
3. If the status code is TemporaryRedirect (307), you extract the redirect URL from the response headers (response.Headers.Location) and make another request to that URL.
4. Finally, if the status code after following the redirect is OK, you can process the content.

Make sure to handle exceptions appropriately and include error handling based on your specific requirements. Additionally, be aware of the website's terms of service and policies when scraping, and consider adding headers to your requests to mimic a more natural browsing behavior.

To check a proxy for blacklisting, it is necessary to use special tools developed for this purpose. Many proxy-checkers provide free online IP-address verification and provide detailed information related to the proxy servers security. To get it, just enter the IP address of the proxy and click on the "Verify" button.

There are 2 ways to do this. The first is to manually change the settings in /etc/environment, but you will definitely need root access to do that. You can also use the Network Manager utility (compatible with all common DEs). You just have to make sure beforehand that the driver for the network adapter to work properly is installed on the system.