For large-scale crawler projects, you definitely need a good anti-crawling mechanism, and it should also be used in conjunction with the proxy IP. Only the combination of these two can make your crawler more efficient and accurate. Today I will borrow some of my free time to talk about solutions for python crawler networks. Here we provide two modes: intranet penetration and port forwarding.
Most crawler programmers should know that intranet penetration and port forwarding are two common network technologies, and they are widely used in many network applications.
1. Intranet penetration
Intranet penetration is a technology that allows you to access your intranet services from the public network. This is achieved by establishing a tunnel between the internal network and the public network. This tunnel can forward requests from the public network to services on the intranet, thereby achieving intranet penetration. Intranet penetration has applications in many scenarios, such as accessing your private cloud service on your home network, or accessing your internal network outside the office.
2. Port forwarding
Port forwarding is a technology that allows you to forward traffic from one network port to another. This can be used in many scenarios, such as running multiple services on a server, but you only have one public IP address. Through port forwarding, you can forward different public network ports to different services on your server, thereby running multiple services on one IP address.
Both techniques require some networking knowledge to implement, but there are many tools and libraries that can help you achieve these functions. For example, you can use Python's socket library to implement port forwarding, or use the pyngrok library to achieve intranet penetration.
Practical tutorial
Intranet penetration and port forwarding are two important concepts in network programming. The following is a basic Python tutorial to implement intranet penetration and port forwarding:
1. Install the necessary libraries: First, you need to install the necessary libraries in your Python environment. For example, you may need to use sockets to handle network connections. You can use pip to install these libraries:
pip install pyngrok
2. Create a new Python file: Create a new Python file in the directory where you want to store the code, for exampleport_forward.py.
3. Write code: In theport_forward.py file, you can write the following code to achieve intranet penetration and port forwarding:
from pyngrok import ngrok
# 开启一个HTTP隧道
# 获取iP：http://jshk.com.cn/mb/reg.asp?kefu=xjy
public_url = ngrok.connect(80, "http")
print("公网访问URL:", public_url)
4. Run the code: From the command line, run the following command to start your code:
python port_forward.py
This will start your code, which will start listening on the specified port and forward it to the public network.
The above is just a basic tutorial, and actual applications may be more complex. You may need to deal with issues such as security, stability, performance, etc., or you may need to use more complex network programming techniques. You can check out the official documentation for socket and pyngrok for more information and tutorials.
Please note that intranet penetration and port forwarding may cause security risks. You should ensure that your application is secure and only allow trusted users to access your service.
If you want the crawler project to run stably, you should not only look at the impact of IP, but also pay attention to the quality of the code. A two-pronged approach can make the crawler more handy. The above is the understanding of crawler IP. If there are any mistakes, I hope you can correct me.