Nowadays, more and more people have experience with crawlers. But when they try to crawl data from some well-known websites, will they encounter problems such as IP restrictions or speed? Today, we will explore the concept of dynamic proxy IP and how to create a simple crawler program to solve these problems.
1. What is a dynamic proxy IP?
Dynamic proxy IP, in simple terms, is to hide the real IP through a proxy server to protect our privacy information while also improving the efficiency of our crawlers.
2. Benefits of Dynamic Proxy
1. Speed up access
Generally speaking, when we visit a website, the proxy server will have a cache function. In this way, when we visit the website again, the proxy server can directly obtain information from the cache, thereby speeding up our access speed.
2. Protecting privacy information
High-quality proxy IP is of great help to network security. It can not only protect our computers from viruses, but also protect the internal information of the enterprise from hacker attacks.
3. Improve download speed
Some websites limit the number of threads for each IP. At this time, using a proxy IP can break through this limitation and increase our download speed.
4. As a firewall
The proxy server can act as a firewall to protect the security of the LAN. It isolates the internal network from the external network, provides the function of monitoring the network and recording the transmission information, thereby enhancing the security of the LAN.
5. Increase the crawler speed
Many websites restrict IP addresses to prevent crawlers. However, using dynamic proxy IP addresses can bypass this restriction and allow us to better crawl network data. At the same time, we can also customize the time to change the IP address to improve the efficiency of our crawlers.
6. Manage network resources
We can restrict some shared resources to users in specific regions, thereby maintaining the regionality of resources.
3. Categories of Dynamic Proxy IP
According to the classification of anonymity, proxy IP can be divided into high anonymous proxy IP, ordinary anonymous proxy IP and transparent proxy IP. Among them, high anonymous proxy IP has the highest anonymity and transparent proxy IP has the lowest anonymity.
According to the time limit, proxy IP can be divided into static proxy IP and dynamic proxy IP. Static proxy IP is a fixed IP address assigned to you, but dynamic proxy IP has a time limit and will become invalid after the time limit. Dynamic proxy IP can be divided into long-term proxy IP and short-term proxy IP. The time limit of short-term proxy IP generally ranges from a few seconds to a few minutes, while the time limit of long-term proxy IP usually ranges from a few minutes to a few days.
According to the classification of protocol type, proxy IP can be divided into http(s) proxy IP and socks5 proxy IP. http(s) proxy IP also supports http and https protocols, while socks5 proxy simply performs data transmission without any requirements for protocol type.
This article comes from online submissions and does not represent the analysis of kookeey. If you have any questions, please contact us
