Programming VIP

1. Background Recently, due to the needs of the project, we have migrated all versions of log4j 1.x to the version of log4j 2.x, and the subsequent slf4j integration log4j configuration (the perfect solution for building a project log system using Slf4j integration Log4j2) and log4j2 configuration file details require a good chat.This article i ...

1. What is FastDFS FastDFS is an open source, lightweight, distributed file system that solves the problems of large data storage and load balancing. It is especially suitable for online services with small and medium files (recommended range: 4 KB < file_size < 500 MB), such as photo album websites, video websites, etc. FastDFS is dev ...

TCP and Concurrent Server Unlike UDP, it is a connection-oriented, reliable data transmission protocol. TCP Communication is Complicated Write a TCP server first. The general steps are as follows: 1. The first step is to create a socket socket: socket() 2. Servers usually need a fixed IP address and a fixed port number. Servers need to bin ...

Catalog 1. Introduction of yaml file 1. yaml File Rules 2. yaml file data structure 2. python reads yaml configuration file 1. Prerequisites 2. Read yaml file data 3. yaml file data is a key-value pair 4. yaml file data is an array 5. Ba ...

Problem statement The original project http request is completed through feign + ribbon + urlconnection. Considering the network and cpu overhead caused by frequent connection release of urlconnection, http client is used as the connection pool. Upgraded, it is found that there are problems of calling downstream service code and tampering with ...

In video coding, before arithmetic coding, we need to binarize the symbols that need to be transmitted. Today we will learn some common binarization methods. Common binary coding algorithms are: Uniary code, truncated Uniary code, truncated Rice bina ...

The actual behavior of the Tomcat server: Because: Enter in the browser's address bar: localhost:8080/ProjectName / resource path Where the resource path: It's the resource path in @WebServlet("/demo3") 1. Through this path, the class poi ...

Writing simple crawlers using the urllib library that comes with the python system urlopen() Gets the html source for a URLread() Read the html source contentdecode("utf-8") converts bytes to strings #!/usr/bin/env python # -*- coding:utf-8 -*- import urllib.request html = urllib.request.urlopen('http://edu.51cto.com/course/8360.html ...

Requests request is to simulate a browser request with python's requests module and return html source code There are two types of simulated browser requests, one that does not require user login or authentication, and the other that requires user login or authentication. 1. Requests that do not require user login or authentication This is a s ...

Catalog 1 Generator (Variation of Function) 2 Derivative Formula 3 Recursion 1 Generator (Variation of Function) Judging whether a function is a generator function: Just see if there is yield inside the function # Generator function (whether yield is included in it) def func(): print('F1') y ...