📱 Express.js Query Parameter Saver

A simple Express.js application that saves and retrieves query parameters.

📋 Requirements • 🚀 Usage • 🛣️ Endpoints • 📜 Script • 🔍 Visualization • ⚠️ Disclaimer

---

📋 Requirements

• Node.js
• Express.js

🚀 Usage

1. Clone the repository:

   git clone https://github.com/ronknight/app-js.git
   

2. Install dependencies:

   npm install
   

3. Run the server:

   node app.js
   

4. The server will start running on http://localhost:80

🛣️ Endpoints

1. 🌐 / (GET)

   • Saves the code and state query parameters
   • Returns a blank HTML page

2. 🔍 /get-saved-name (GET)

   • Retrieves the saved code and state parameters
   • Returns a JSON object with the saved values

📜 Script

The app.js script sets up an Express.js server that:

• 💾 Saves code and state query parameters from the root endpoint
• 🔒 Stores these values in memory
• 🔍 Provides an endpoint to retrieve the saved values

🔍 Visualization

Here's a flow chart that visualizes the structure and flow of the application:

graph TD
    A[Start Server] -->|Listen on PORT 80| B[Initialize Variables]
    B --> C{Receive Request}
    C -->|GET '/'| D[Save Query Parameters]
    D --> E[Return Blank HTML]
    C -->|GET '/get-saved-name'| F{Saved Code Exists?}
    F -->|Yes| G[Return JSON with Code and State]
    F -->|No| H[Return 404 Not Found]

    style A fill:#f9d71c,stroke:#333,stroke-width:2px
    style B fill:#f9d71c,stroke:#333,stroke-width:2px
    style C fill:#f9d71c,stroke:#333,stroke-width:2px
    style D fill:#a2d2ff,stroke:#333,stroke-width:2px
    style E fill:#a2d2ff,stroke:#333,stroke-width:2px
    style F fill:#f9d71c,stroke:#333,stroke-width:2px
    style G fill:#a2d2ff,stroke:#333,stroke-width:2px
    style H fill:#ffadad,stroke:#333,stroke-width:2px

Loading

This flow chart illustrates:

• The server start and initialization process
• How requests are handled for different endpoints
• The logic flow for saving and retrieving parameters
• Success and error states

Color coding:

• Yellow: Main flow and decision points
• Light Blue: Successful operations
• Light Red: Error state

⚠️ Disclaimer

This application is for demonstration purposes only. In a production environment, consider:

• 🔐 Implementing proper security measures
• 💽 Using a database for persistent storage
• 🧪 Adding error handling and input validation

---

Made with ❤️ by Ronknight