Japan Residential Proxy

A VPN server address is an IP address or domain name through which you access the Internet. All traffic will be redirected through it. And the address is specified by the user, you can get it directly from the VPN-service, which provides such a service.

This depends directly on how the proxy server works. Some of them do not require any authorization at all, others require username and password for access, and others require you to view ads and so on. Which option will be used depends directly on the service that provides access to the proxy server.

In UDP, there is no built-in mechanism to know the size of an incoming packet before receiving it. The UDP protocol is a connectionless protocol, meaning it does not establish a connection between the sender and receiver before sending data. This makes UDP fast and efficient but also means that the receiver has no way to know the size of the incoming packet in advance.

When you receive a UDP packet, you can determine its size by examining the received data. In most programming languages, you can access the received data as a byte array or buffer. The size of the packet can be calculated by finding the length of the received data.

For example, in Python, you can use the recvfrom() function to receive a UDP packet and the len() function to calculate its size:

import socket

# Create a UDP socket
server_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

# Receive a UDP packet
data, address = server_socket.recvfrom(1024)

# Calculate the size of the received packet
packet_size = len(data)

print(f"Received packet of size: {packet_size} bytes")

In this example, the recvfrom() function receives a packet up to 1024 bytes in size, and the len() function calculates the length of the received data, which is the size of the packet.

Keep in mind that the maximum size of a UDP packet is limited by the maximum transmission unit (MTU) of the underlying network, which is typically 1500 bytes. However, it's always a good idea to handle cases where the received packet size exceeds your expectations, as this may indicate a packet fragmentation issue or an error in the communication.

To scrape all HTML content from a website using Scrapy, you need to create a spider that visits each page of the website and extracts the HTML content. Here's a simple example:

Create a Scrapy Project:
If you haven't already, create a Scrapy project by running the following commands in your terminal or command prompt:

scrapy startproject myproject
cd myproject

Define a Spider:
Open the spiders directory in your project and create a spider (e.g., html_spider.py). Edit the spider file with the following content:

import scrapy

class HtmlSpider(scrapy.Spider):
    name = 'html_spider'
    start_urls = ['http://example.com']  # Start with the main page of the website

    def parse(self, response):
        # Extract HTML content and yield it
        html_content = response.text
        yield {
            'url': response.url,
            'html_content': html_content
        }

        # Follow links to other pages (if needed)
        for next_page_url in response.css('a::attr(href)').extract():
            yield scrapy.Request(url=next_page_url, callback=self.parse)

This spider, named html_spider, starts with the main page (start_urls) and extracts the HTML content. It then follows links (a::attr(href)) to other pages and extracts their HTML content as well.

Run the Spider:
Run your spider using the following command:

scrapy crawl html_spider -o output.json

This command will execute the html_spider and save the output in a JSON file named output.json. Each item in the JSON file will contain the URL and HTML content of a page.

Technically, a proxy is an ordinary computer or server connected to a network (local or Internet). It accepts traffic from the user, redirects it to the address that was specified in the request. And then receives the response from the server and transmits it to the user's equipment. That is, it is actually an intermediary.