Vitest Proxy

There are special tools developed to check if a proxy is working. There are a large number of appropriate services and programs on the Internet. Any software that works in a general way should be excluded from their number. To use online checkers to check the quality and validity of a proxy, just specify your IP address and port number in the fields provided.

A DNS server is a remote computer that receives a domain request from a user device. And it converts it into an IP address. Sometimes it is through the DNS-server that ISPs block sites. And DNS-proxy, respectively, allows you to bypass these restrictions completely.

Scraping a large number of web pages using JavaScript typically involves the use of a headless browser or a scraping library. Puppeteer is a popular headless browser library for Node.js that allows you to automate browser actions, including web scraping.

Here's a basic example using Puppeteer:

Install Puppeteer:

npm install puppeteer

Create a JavaScript script for web scraping:

const puppeteer = require('puppeteer');

async function scrapeWebPages() {
    const browser = await puppeteer.launch();
    const page = await browser.newPage();

    // Array of URLs to scrape
    const urls = ['https://example.com/page1', 'https://example.com/page2', /* add more URLs */];

    for (const url of urls) {
        await page.goto(url, { waitUntil: 'domcontentloaded' });

        // Perform scraping actions here
        const title = await page.title();
        console.log(`Title of ${url}: ${title}`);

        // You can extract other information as needed

        // Add a delay to avoid being blocked (customize the delay based on your needs)
        await page.waitForTimeout(1000);
    }

    await browser.close();
}

scrapeWebPages();

Run the script:

node your-script.js

In this example:

• Puppeteer is used to launch a headless browser and open pages.
• The urls array contains the list of web pages to scrape. You can extend this array with the URLs you need.
• Inside the loop, you can perform scraping actions using Puppeteer functions. For example, extracting data using page.title().

Keep in mind the following:

• Be aware of the legality and terms of service for web scraping on the targeted websites.
• Respect the websites' robots.txt files and use delays between requests to avoid being blocked.
• Customize the scraping logic based on the structure of the web pages you are dealing with.

To transfer requests session from Requests to Selenium, you can follow these steps:

First, import the necessary libraries:

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from requests.sessions import Session

Create a new requests session and perform your requests:

req_session = Session()
response = req_session.get('https://example.com')

Now, create a new Selenium WebDriver instance and pass the requests session as a parameter:

driver = webdriver.Chrome()
driver.get('https://example.com')
req_session_cookies = req_session.cookies.get_dict()
driver.add_cookies(list(req_session_cookies.values()))

Use Selenium to interact with the web page:

search_box = WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.ID, 'search-box')))
search_box.send_keys('your search query')
search_box.send_keys(Keys.RETURN)

To continue using the same session for subsequent requests, you can create a new requests session with the cookies from the Selenium driver:

selenium_session_cookies = driver.get_cookies()
new_req_session = Session()
for cookie in selenium_session_cookies:
    new_req_session.cookies.set(cookie['name'], cookie['value'])

Now you can use the new_req_session to make new requests while maintaining the same session as the Selenium driver.

Remember to close the Selenium driver after you're done:

driver.quit()

To configure a proxy in Nginx, you need to modify the Nginx configuration file and add the appropriate proxy settings. Follow these steps to set up a proxy in Nginx:

Open the Nginx configuration file: This file is typically located at /etc/nginx/nginx.conf or /etc/nginx/conf.d/default.conf, depending on your system and Nginx installation. You may need root or administrative privileges to edit this file.

Locate the http block: Inside the Nginx configuration file, look for the http block, which contains the global settings for your Nginx server.

Add a server block: Within the http block, add a new server block that specifies the domain name or IP address and port number of the client request you want to proxy to another server. For example:

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://your-destination-server.com;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

Replace example.com with the domain name you want to proxy to the destination server, and http://your-destination-server.com with the destination server's address and port number.

Configure proxy settings: Within the location block, add the necessary proxy settings to forward the client's request to the destination server and pass along the appropriate headers. Some common proxy settings include:

- proxy_pass: Specifies the destination server's address and port number.
- proxy_set_header: Sets the value of specific headers to be sent to the destination server.
- proxy_redirect: Redirects URLs in the response from the destination server to a different URL.
- proxy_connect_timeout: Sets the timeout for establishing a connection to the destination server.
- proxy_read_timeout: Sets the timeout for reading the response from the destination server.
- proxy_send_timeout: Sets the timeout for sending a response to the client.

Save the configuration file: After making the necessary changes, save the Nginx configuration file.

Test the configuration: Before restarting Nginx, test the configuration to ensure there are no syntax errors. You can do this by running the following command:

nginx -t

If the test is successful, Nginx will output Configuration test successful.

Restart Nginx: Apply the changes by restarting the Nginx server. Depending on your system, you can use one of the following commands:

sudo service nginx restart

or

sudo systemctl restart nginx

After completing these steps, your Nginx server will act as a proxy and forward client requests to the specified destination server.