https://github.com/chandanksdeveloper/todo-web-app

A secure Todo web app with user authentication (login/registration) and task management, built with Java Servlets, MySQL, GSON, ReactJs and Tailwind featuring session-based access control and proper password hashing. The API handles JSON data with custom date serialization for todo due dates.
https://github.com/chandanksdeveloper/todo-web-app

context-api css css3 curd-operation dao gson html html5 httpservlet java jdbc json mysql mysqlconnector reactjs rest-api servlet session tailwind tomcat-server

Last synced: 12 days ago
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A secure Todo web app with user authentication (login/registration) and task management, built with Java Servlets, MySQL, GSON, ReactJs and Tailwind featuring session-based access control and proper password hashing. The API handles JSON data with custom date serialization for todo due dates.

• Host: GitHub
• URL: https://github.com/chandanksdeveloper/todo-web-app
• Owner: ChandanKSDeveloper
• Created: 2025-06-21T18:42:39.000Z (7 months ago)
• Default Branch: main
• Last Pushed: 2025-06-22T06:28:38.000Z (7 months ago)
• Last Synced: 2025-06-22T07:26:44.912Z (7 months ago)
• Topics: context-api, css, css3, curd-operation, dao, gson, html, html5, httpservlet, java, jdbc, json, mysql, mysqlconnector, reactjs, rest-api, servlet, session, tailwind, tomcat-server
• Language: JavaScript
• Homepage:
• Size: 2.59 MB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
### **Project Overview: Todo Management Web Application**

#### **Core Functionality**

1. **User Authentication**

   - Registration with password hashing

   - Login/logout with session management

   - Password security using PBKDF2 hashing

2. **Todo Operations**

   - Create todo items with due dates

   - (Implied) CRUD operations for task management

   - User-specific todo items (each user sees their own tasks)

3. **API Endpoints**

   - `POST /api/auth/register` - User registration

   - `POST /api/auth/login` - User login

   - `GET /api/auth/logout` - Session termination

   - `POST /api/todos` - Create new todo items

#### **Technical Stack**

- **Backend**: Java Servlets

- **Data Handling**: 

  - GSON for JSON serialization

  - Custom TypeAdapter for LocalDate

- **Database**: 

  - MySQL (JDBC)

  - DAO pattern for data access

- **Security**:

  - Password hashing

  - Session-based authentication

#### **Key Components**

1. **Authentication Controller** (`AuthController`)

   - Handles user sessions

   - Prevents multiple logins

   - Validates credentials

2. **Todo Controller** 

   - Manages todo operations

   - Enforces user ownership

   - Handles date serialization

3. **Utility Classes**

   - `PasswordUtil`: Secure password handling

   - `TimeUtils`: Date conversions

#### **Data Flow**

1. **Frontend** → **JSON API** → **Servlet** → **DAO** → **Database**

2. All responses in JSON format

#### **Notable Features**

- **REST-like API** design

- **Proper separation** of concerns (controllers, DAOs, utils)

- **Secure practices** for authentication

- **Type-safe date handling** with Java 8 Time API