lv7 Embedded Development-Network Programming Development 11 TCP Management and UDP Protocol

Table of Contents 1 TCP management 1.1 Three-way handshake 1.2 Wave four times 1.3 Keep-alive timer 2 wireshark installation and experiment 3.1 icmp protocol packet capture demonstration 3.2 TCP protocol packet capture demonstration 3 UDP protocol 3.1 Main features of UDP: 4 exercises 1 TCP Management 1.1 Three-way handshake The process of establishing a TCP […]

Springboot integrated permission management framework apache shiro

1. Explanation of terms There are a lot of them online 2. pom dependency <dependency> <groupId>org.apache.shiro</groupId> <artifactId>shiro-spring</artifactId> <version>1.2.2</version> </dependency> <dependency> <groupId>org.apache.shiro</groupId> <artifactId>shiro-ehcache</artifactId> <version>1.2.2</version> </dependency> encache is optional and is mainly used for caching during authentication. 3. shiroConfiguration The configuration of shiro is mainly the settings of shiroFilter and securityManager @Component public class ShiroConfiguration { <br> […]

Spring01–Spring Framework

1.Getting started with Spring Official website: Spring | Home Spring family bucket: 1.1.Spring Framework system architecture Spring Framework is the most basic project in the Spring ecosystem and the foundation for other projects. As shown in FIG: Core Container: core container AOP: Aspect-oriented programming—-Aspects: the implementation of AOP ideas Data Access/Integration: Data Access/Integration Transactions: Transactions […]

Design of a calculator mini-program based on WeChat Developer Tools

The Link Your Class https://bbs The Link of Requirement of This Assignment The Aim of This Assignment complete the calculator with a visual interface MU STU ID and FZU STU ID 21125341_832101123 Table of Contents Ⅰ. Blog Introduction Ⅱ. PSP Form: Outlining the Work Ⅲ. Problem-Solving Approach: Critical Thinking and Information Retrieval Ⅳ. […]

PYTHON calculates CPK and specification limit pass rate, and draws histogram probability density curve

CPK (Process Capability Index) is a statistical index used to measure the stability and consistency of a process, especially used in manufacturing and quality management. It measures the variability of a process relative to specification boundaries and helps determine whether the process is capable of producing a conforming product or service. Normal distribution assumption: The […]

Probably the most popular third-party open source testing framework in Python, pytest

1. Introduction This article is the third in “Let’s talk about Python’s unit testing framework”. The first two articles introduced the standard library unittest and the third-party unit testing framework nose respectively. As the last article in this series, the finale is the most popular third-party unit testing framework in the Python world: pytest. pytest […]

KingbaseES table-level setting autovacuum related parameters and triggering mechanism

Foreword Setting autovacuum related parameters at the table level can effectively avoid the peak of autovacuum triggering the global default threshold. For example, if you want the autovacuum task of the table to be performed more frequently, you can set a smaller autovacuum-related parameter autovacuum_vacuum_scale_factor at the table level. If you need to set autovacuum-related […]

Python Paramiko module

1. Paramiko automatically logs in to the network device to capture configuration information # !/usr/bin/env python # -*- coding:utf-8 -*- import paramiko ssh = paramiko.SSHClient() ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) ssh.connect(hostname=’′, port=22, username=’cisco’, password=’cisco’) client = ssh.invoke_shell() def run_cmd(cmd, endswith): # Parameters: cmd command, end character buff = ” client.send(cmd) while not buff.endswith(endswith): resp = str(client.recv(1024), ‘utf-8’) buff + […]