Content Delivery Network (CDN) Implementation

A distributed CDN solution designed to optimize web content delivery through geographic edge servers and caching.

Project Overview

This CDN implementation enhances website performance by:

• Reducing latency through geographic distribution
• Improving load times by 50-70%
• Providing redundancy and DDoS protection
• Utilizing Redis caching with automatic content expiration
• Implementing load balancing across edge servers

Key Components

🖥 Origin Server (Port 9090)

• Serves core HTML content via Go + Gorilla Mux
• Pages:
  • /main.html - Home page
  • /arch.html - System architecture
  • /desc.html - CDN benefits documentation
• Acts as content source for edge servers

🌐 Edge Servers

Location	Port	Features
US	8080	- Redis caching - Latency monitoring - Auto-redirect from /
EU	8090	- Cache synchronization - TTL management (10min) - Request metrics

Getting Started

Prerequisites

• Install Go (v1.21+)
• Install Redis (v7.0+)
• Install Docker (v24.0+)

Installation

1. Clone the repository:

   git clone https://github.com/JasminPradhan/ContentDeliveryNetwork.git
   cd ContentDeliveryNetwork

2. Start the origin server:

   go run origin/main.go

3. Start the edge servers:

   cd edge-eu
   docker build -t cdn-edge-eu .
   docker run -p 8080:8090 cdn-edge-eu

   cd edge-us
   docker build -t cdn-edge-us .
   docker run -p 8060:8080 cdn-edge-us

4. Access the CDN:

   • US Edge Server: http://localhost:8080
   • EU Edge Server: http://localhost:8090

System Architecture

graph TD
    User -->|Request| Edge
    Edge -->|Cache Hit| User
    Edge -->|Cache Miss| Origin
    Origin -->|Content + Headers| Edge
    Edge -->|Cache & Deliver| User

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Demonstration

Cache-Aware Delivery System

• Automatic Source Selection:

  GET /main.html HTTP/1.1
  X-Cache-Status: hit (US Edge) | miss (Origin)