How to use Go language to write the user login module in the door-to-door cooking system?

How to use Go language to write the user login module in the door-to-door cooking system?

With the development of the Internet and the popularity of smartphones, door-to-door cooking services have become an increasingly popular choice in modern life. In order to provide more convenient and convenient services, many door-to-door cooking platforms provide user login functions. This article will introduce how to use Go language to write the user login module in the door-to-door cooking system.

1. Determine the requirements

Before we start writing the user login module, we need to clarify the system requirements. The main functions of the user login module include user registration, user login, password retrieval, etc. These functions require interaction with the database to save and obtain user information.

2. Create database

First, we need to create a database to store user information. You can use any relational database, such as MySQL, PostgreSQL, etc. The following is a simple SQL table creation statement for a user table:

CREATE TABLE users (
  id INT NOT NULL AUTO_INCREMENT,
  username VARCHAR(50) NOT NULL,
  password VARCHAR(50) NOT NULL,
  PRIMARY KEY (id),
  UNIQUE KEY (username)
);

3. Initialization project

Before using the Go language to write the user login module, you need to initialize a new Go project. You can initialize the project by using the go mod command, and then create the main.go file in the project directory.

4. Write a code example

In the main.go file, we will write a code example for the user login module.

First, we need to import the necessary packages:

package main

import (
  "fmt"
  "net/http"

  "github.com/gorilla/mux"
)

Next, we define a program structure to save the database and routing information:

type App struct {
  Router *mux.Router
  DB     *sql.DB
}

Then, we need to write Route processing function that handles user registration:

func (a *App) handleRegister(w http.ResponseWriter, r *http.Request) {
  // 解析请求参数
  r.ParseForm()
  username := r.Form.Get("username")
  password := r.Form.Get("password")

  // 验证用户名和密码
  // ...

  // 将用户信息插入数据库
  // ...
  
  // 返回成功响应
  fmt.Fprintf(w, "用户注册成功")
}

Next, we write the route processing function that handles user login:

func (a *App) handleLogin(w http.ResponseWriter, r *http.Request) {
  // 解析请求参数
  r.ParseForm()
  username := r.Form.Get("username")
  password := r.Form.Get("password")

  // 验证用户名和密码
  // ...

  // 检查用户名和密码是否匹配数据库中的记录
  // ...
  
  // 返回登录成功响应
  fmt.Fprintf(w, "用户登录成功")
}

Finally, we need to write the main function to initialize the App and set the route:

func main() {
  // 初始化数据库连接
  db, err := sql.Open("mysql", "root:password@tcp(localhost:3306)/demo")
  if err != nil {
    log.Fatal(err)
  }

  // 初始化App
  app := &App{
    Router: mux.NewRouter(),
    DB:     db,
  }

  // 注册路由
  app.Router.HandleFunc("/register", app.handleRegister).
    Methods("POST")
  app.Router.HandleFunc("/login", app.handleLogin).
    Methods("POST")

  // 启动服务
  log.Fatal(http.ListenAndServe(":8080", app.Router))
}

5. Run the program

Open the terminal, enter the project directory, and use the following command to run the program:

go run main.go

At this point, we have successfully written in Go language The user login module in the door-to-door cooking system. Users can use the door-to-door cooking service provided by the system through the registration and login functions.

Summary:

This article introduces how to use Go language to write the user login module in the door-to-door cooking system. By using HTTP services and database operations in the Go language, we can easily implement user registration, user login and other functions. I hope this article can help you write the user login module you encounter in Go language development.

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