Golang implements management system

With the popularization of the Internet and the rapid development of information technology, people's demand for information processing and management is also increasing. Therefore, the development of various management systems came into being. Compared with other programming languages, golang has received more and more attention and use due to its concurrent processing capabilities and memory management features. This article will discuss how to use golang to implement a simple management system.

1. Requirements Analysis

Before implementing the management system, we need to determine the system requirements first. In this system, we need to implement the following functions:

1. User login and registration functions, including user role management;
2. Functions to add, delete, and modify user information;
3. Function to display all user information.

2. System Design

System design is the basis for realizing the management system. This part includes the following content:

1. Database Design
   In this article In the system, we need to design a user table, which includes user name, password, role and other information.
2. Front-end design
   For the front-end part of this system, we chose the Bootstrap framework to achieve the beautification effect of the website.
3. Backend design
   The backend is implemented in Golang language and uses three libraries to handle various requests:
4. gin library is used to implement routing and middleware for http requests
5. gorm library is used to connect to the mysql database and implement addition, deletion, modification and query of the database
6. jwt-go library is used to generate and verify JSON Web Token, which is used for user authentication

The overall design of the system is as follows:

3. System implementation

1. Database connection

Establish a connection to the mysql database through the gorm library and store the data of the user table. Call db in the main function, err := gorm.Open("mysql", "username:password@tcp(host:bgw330106.art.aliyun.com:3306)/database name?charset=utf8mb4&parseTime=True&loc=Local") statement That’s it. The username, password, host and database name need to be changed according to the actual situation.

2. User Registration

In this system, user registration requires filling in the username and password. For the input data, we need to verify it to ensure the validity of the input. If the verification is successful, the user information is stored in the database. We use the POST method to send the form data to the server, and perform validation in the middleware and store the user information in the database.

3. User login and authentication

User login requires input of user name and password, and authentication in order to enter the system. We use JWT mechanism to implement user authentication. After the verification is passed, the server will return a JWT Token and store the Token in Cookies to verify the user's identity. Subsequent system function calls require authentication in the middleware and return corresponding information based on the user role.

4. Add, delete, modify and check user information

In this system, administrator users can add, delete, modify and check the information of ordinary users. The specific implementation method is as follows:

• Create an API, use the GET method to query all user information, use the POST method to add user information, use the PUT method to update user information, and use the DELETE method to delete user information.

• In all requests, authentication and administrator role determination are required to limit the permissions of the administrator user.

4. System testing

System testing is an important part of the work after the system is implemented. In this system test, we perform the test manually. The test steps are as follows:

• Log in to the system and authenticate;
• Add, delete, and modify user information;
• Query all user information and compare the query results with the database information.

The system test results show that the system can operate normally and meet the set requirements.

Conclusion

In this article, we discussed how to implement a simple management system using golang. The system has basic functions such as user login and registration functions, and user information management. By implementing this system, we can better utilize the characteristics of the golang language and further improve our programming practice capabilities.

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