C# HTTP & HTTPS Proxy

This project implements a high-performance HTTP and HTTPS proxy using C#, designed for efficient request handling, logging, and authentication. It supports URL logging, environment-variable-based authentication, and seamless Docker deployment.

🚀 Key Features

• ✅ Supports both HTTP & HTTPS traffic interception
• ✅ Logs all accessed URLs to the terminal and a persistent log file
• ✅ Enables authentication via environment variables (PROXY_USERNAME, PROXY_PASSWORD)
• ✅ Containerized deployment using Docker for cross-platform compatibility
• ✅ Optimized for performance and minimal resource utilization

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🎯 Use Cases

• Security & Monitoring → Track and log outgoing requests for auditing.
• Traffic Filtering → Restrict access to certain websites or services.
• Performance Optimization → Cache frequently accessed resources.
• Development & Debugging → Inspect HTTP/HTTPS requests for debugging applications.
• Anonymization → Route traffic through a controlled proxy for privacy.

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🛠️ Installation & Usage Guide

1️⃣ Prerequisites

Before running the proxy, ensure you have the following dependencies installed:

• .NET SDK (9.0 or later) → Download .NET SDK
• Docker (for containerized execution) → Download Docker

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2️⃣ Running Locally (Without Docker)

🔹 Step 1: Clone the Repository

git clone https://github.com/yourusername/csharp-proxy.git
cd csharp-proxy

🔹 Step 2: Configure Environment Variables

Linux/macOS

export PROXY_USERNAME=myuser
export PROXY_PASSWORD=mypass

Windows (PowerShell)

$env:PROXY_USERNAME="myuser"
$env:PROXY_PASSWORD="mypass"

🔹 Step 3: Restore Dependencies

dotnet restore

🔹 Step 4: Execute the Proxy

dotnet run --project ProxyServer

🔹 Step 5: Configure Your System to Use the Proxy

Set your web browser, command-line tool, or application to route traffic through http://localhost:8080.

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3️⃣ Running in a Docker Container

🔹 Step 1: Build the Docker Image

docker build -t csharp-proxy .

🔹 Step 2: Launch the Proxy in a Container

docker run -d -p 8080:8080 \
  -e PROXY_USERNAME=myuser \
  -e PROXY_PASSWORD=mypass \
  --name proxy csharp-proxy

🔹 Step 3: Validate Proxy Functionality

Use http://localhost:8080 as the proxy in your browser or command-line tool.

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📂 Project Directory Structure

/csharp-proxy
│── ProxyServer/
│   ├── Program.cs          # Application entry point
│   ├── ProxyHandler.cs     # Handles HTTP and HTTPS requests
│   ├── Logger.cs           # Captures and records accessed URLs
│   ├── Authentication.cs   # Implements authentication mechanisms
│   ├── ProxyServer.csproj  # .NET project configuration
│── Dockerfile              # Docker build instructions
│── .gitignore              # Files and directories to be ignored by Git
│── README.md               # Project documentation

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🔍 Logging & Monitoring

• Live Terminal Logging → Displays accessed URLs in real-time.
• Persistent Log File (proxy.log) → Stores all request URLs for auditing and analysis.

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🎯 Troubleshooting Guide

Issue	Potential Solution
Proxy is unresponsive	Ensure your browser or application is correctly configured to use http://localhost:8080.
Authentication fails	Verify that the PROXY_USERNAME and PROXY_PASSWORD environment variables are correctly set.
Docker build errors	Confirm that .NET SDK 9 is installed inside the container environment.

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📜 Licensing Information

This project is released under the MIT License.

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✨ Contribution Guidelines

We welcome contributions! Feel free to submit bug reports, feature requests, or pull requests on GitHub.

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📞 Support & Contact

For inquiries or assistance, please open an issue on GitHub Issues.