search
HomeBackend DevelopmentGolangHow to implement restful login in golang

With the rapid development of the Internet, more and more applications use RESTful interfaces. Simplicity, efficiency, and ease of use have become the main reasons for the popularity of RESTful interfaces. Golang is a programming language similar to C language and has become a very popular programming language in the Internet field. In this article, we will explain how golang implements the RESTful login interface.

RESTful interface is an API interface based on HTTP protocol and REST architectural style. The RESTful interface mainly uses HTTP verbs and URIs to describe operations on resources, and uses JSON format to transmit data. Therefore, before implementing the RESTful login interface, we need to clarify the meaning of HTTP verbs and URIs.

HTTP verb:

  • GET: Get resource information
  • POST: Create a new resource
  • PUT: Update the resource
  • DELETE : Delete resource

URI format:

HTTP动词 /模块名称/资源类型/资源ID

The following is a simple golang program example for implementing a RESTful login interface:

package main

import (
    "encoding/json"
    "fmt"
    "log"
    "net/http"
)

//定义user结构体
type User struct {
    Username string `json:"username"`
    Password string `json:"password"`
}

//模拟数据源
var users = []User{
    User{"admin", "123456"},
    User{"guest", "123456"},
}

//登录接口
func loginHandler(w http.ResponseWriter, r *http.Request) {
    //获取HTTP请求中的用户名和密码
    var user User
    err := json.NewDecoder(r.Body).Decode(&user)
    if err != nil {
        http.Error(w, err.Error(), http.StatusBadRequest)
        return
    }
    //验证用户名和密码
    for _, u := range users {
        if u.Username == user.Username && u.Password == user.Password {
            w.WriteHeader(http.StatusOK)
            return
        }
    }
    w.WriteHeader(http.StatusUnauthorized)
}

func main() {
    //注册登录接口
    http.HandleFunc("/api/login", loginHandler)

    //启动服务
    err := http.ListenAndServe(":8080", nil)
    if err != nil {
        log.Fatal("ListenAndServe: ", err)
    }
}

As shown above, we A simple RESTful login interface was written using Golang. This interface uses JSON format to transmit data and can verify the received username and password. If the verification is successful, it returns HTTP status code 200, otherwise it returns 401.

Next, we will analyze this code step by step:

Define the User structure

type User struct {
    Username string `json:"username"`
    Password string `json:"password"`
}

The User structure is defined here, which contains two Properties: Username and Password. Note that the json:"xxx" format tag is used here to identify the JSON name of the attribute.

Mock data source

var users = []User{
    User{"admin", "123456"},
    User{"guest", "123456"},
}

Here, instead of using a real database, we create a mock data source for simulating multiple users.

Login interface

func loginHandler(w http.ResponseWriter, r *http.Request) {
    var user User
    err := json.NewDecoder(r.Body).Decode(&user)
    if err != nil {
        http.Error(w, err.Error(), http.StatusBadRequest)
        return
    }
    for _, u := range users {
        if u.Username == user.Username && u.Password == user.Password {
            w.WriteHeader(http.StatusOK)
            return
        }
    }
    w.WriteHeader(http.StatusUnauthorized)
}

This function receives the HTTP request and extracts the username and password from the request. Next, verify that the entered username and password are correct by traversing the existing users in the simulated data source. If the verification is successful, HTTP status code 200 is returned, otherwise 401 is returned.

Register login interface

http.HandleFunc("/api/login", loginHandler)

This code means registering a /login interface. When a matching HTTP request arrives, the loginHandler processing function will be called for processing.

Start service

err := http.ListenAndServe(":8080", nil)

This code means starting an HTTP service, listening to port 8080, and processing HTTP requests. If the startup is successful, the HTTP service will continue to run, waiting for the arrival of HTTP requests.

So far, we have successfully implemented a RESTful login interface written in Golang, which can verify the entered user name and password and return the corresponding HTTP status code. RESTful interface is a very important technology. By defining unified URI and HTTP verbs, the calling and use of the interface can be greatly simplified. In practical applications, we should combine Golang's own characteristics and rationally use related libraries and frameworks to achieve a more efficient and concise RESTful interface.

The above is the detailed content of How to implement restful login in golang. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Go language pack import: What is the difference between underscore and without underscore?Go language pack import: What is the difference between underscore and without underscore?Mar 03, 2025 pm 05:17 PM

This article explains Go's package import mechanisms: named imports (e.g., import "fmt") and blank imports (e.g., import _ "fmt"). Named imports make package contents accessible, while blank imports only execute t

How to implement short-term information transfer between pages in the Beego framework?How to implement short-term information transfer between pages in the Beego framework?Mar 03, 2025 pm 05:22 PM

This article explains Beego's NewFlash() function for inter-page data transfer in web applications. It focuses on using NewFlash() to display temporary messages (success, error, warning) between controllers, leveraging the session mechanism. Limita

How to convert MySQL query result List into a custom structure slice in Go language?How to convert MySQL query result List into a custom structure slice in Go language?Mar 03, 2025 pm 05:18 PM

This article details efficient conversion of MySQL query results into Go struct slices. It emphasizes using database/sql's Scan method for optimal performance, avoiding manual parsing. Best practices for struct field mapping using db tags and robus

How do I write mock objects and stubs for testing in Go?How do I write mock objects and stubs for testing in Go?Mar 10, 2025 pm 05:38 PM

This article demonstrates creating mocks and stubs in Go for unit testing. It emphasizes using interfaces, provides examples of mock implementations, and discusses best practices like keeping mocks focused and using assertion libraries. The articl

How can I define custom type constraints for generics in Go?How can I define custom type constraints for generics in Go?Mar 10, 2025 pm 03:20 PM

This article explores Go's custom type constraints for generics. It details how interfaces define minimum type requirements for generic functions, improving type safety and code reusability. The article also discusses limitations and best practices

How to write files in Go language conveniently?How to write files in Go language conveniently?Mar 03, 2025 pm 05:15 PM

This article details efficient file writing in Go, comparing os.WriteFile (suitable for small files) with os.OpenFile and buffered writes (optimal for large files). It emphasizes robust error handling, using defer, and checking for specific errors.

How do you write unit tests in Go?How do you write unit tests in Go?Mar 21, 2025 pm 06:34 PM

The article discusses writing unit tests in Go, covering best practices, mocking techniques, and tools for efficient test management.

How can I use tracing tools to understand the execution flow of my Go applications?How can I use tracing tools to understand the execution flow of my Go applications?Mar 10, 2025 pm 05:36 PM

This article explores using tracing tools to analyze Go application execution flow. It discusses manual and automatic instrumentation techniques, comparing tools like Jaeger, Zipkin, and OpenTelemetry, and highlighting effective data visualization

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools