Я. Т

2016

2017

2020

ПРОГРАМ ХАНГАМЖ

Жигүүр гранд

Ээж апп

Шамбала

Чимэгэ

ViGer.TV

Hackum.academy

Мандал хуримтлал

Hitech.mn

esource.mn

mandal.capital

...

HOW IT STARTED

2017

WTF is Backend

Backend is the behind-the-scenes functionality of a web application or service. It's what makes everything work even if users don't see it.

Backend is the behind-the-scenes functionality of a web application or service. It's what makes everything work even if users don't see it.

Server

Database

Application programming interface

Languages & Frameworks

Node.js (JavaScript),

Python (Django, Flask),

Java (Spring Boot),

PHP, Ruby (Rails),

Golang

The Backend Workflow

• Client request: When a user clicks or types on the front end.
• Processing the request: The server receives the request and processes it.
• Database interaction: Fetching or storing data from the database.
• Sending a response: The server sends the data or confirmation back to the frontend.

The Backend Workflow

• type Story struct {
  • ID int `json:"id"` 
  • UserID int `json:"user_id"` 
  • Content string `json:"content"` 
  • CreatedAt time.Time `json:"created_at"` 
  • ExpiresAt time.Time `json:"expires_at"`
  • }

The Backend Workflow

• func initDB() (*sql.DB, error) {
• db, err := sql.Open("sqlite3", "./stories.db")
• if err != nil { return nil, err }
  • createTableQuery := ` CREATE TABLE IF NOT EXISTS stories ( id INTEGER PRIMARY KEY AUTOINCREMENT, user_id INTEGER, content TEXT, created_at DATETIME, expires_at DATETIME );` 
    _, err = db.Exec(createTableQuery)
    • if err != nil { return nil, err }
• return db, nil
•  }

• func getStoriesHandler(db *sql.DB) http.HandlerFunc { return func(w http.ResponseWriter, r *http.Request) { rows, err := db.Query("SELECT id, user_id, content, created_at, expires_at FROM stor...", time.Now())
• if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return }
• defer rows.Close()
• var stories []Story
• for rows.Next() {
  • var story Story
  • if err := rows.Scan(&story.ID, &story.UserID, &story.Content, &story.CreatedAt, &story.ExpiresAt);
  • err != nil { http.Error(w, err.Error(), http.StatusInternalServerError)
  • return}  
• stories = append(stories, story) }  
• w.Header().Set("Content-Type", "application/json")
• json.NewEncoder(w).Encode(stories) } }

Tools for Backend Development

• Databases: MySQL, PostgreSQL, MongoDB.
•  
• Web Servers: Apache, NGINX.
•  
• Version Control: Git, GitHub.
•  
• Cloud Hosting: AWS, Azure, Google Cloud.

•  

Why Backend is Important

• Performance: Backend code determines how fast and efficiently a website or app works.
•  
• Security: Ensures sensitive data like passwords and payment info are protected.
•  
• Scalability: Backend systems need to grow with increased user traffic and data.

•  

Why Backend is Important

• Performance: Backend code determines how fast and efficiently a website or app works.
•  
• Security: Ensures sensitive data like passwords and payment info are protected.
•  
• Scalability: Backend systems need to grow with increased user traffic and data.

•  

My backend journey

https://roadmap.sh/backend?r=backend-beginner

https://roadmap.sh/backend?r=backend-beginner

Learn much as you can, find your way

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