Advanced Go Systems

Three production-minded Go projects built by Anas at NUTECH

Realtime communication. Secure APIs. Coordinated concurrency.

Explore Portfolio · Signal Room · Keyline · Orbit

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Overview

This repository contains three complete Advanced Go practice projects and a cinematic portfolio website that presents them. Every application has a real Go backend, an embedded responsive frontend, and a distinct visual identity.

Project	Focus	Live Demo
7.1 Signal Room	Gorilla WebSocket chat, goroutines, channels, presence, and message broadcasting	Open Signal Room
7.2 Keyline Workspace	Gin REST API, JWT middleware, bcrypt passwords, and per-user task CRUD	Open Keyline
7.3 Orbit Crawler	Concurrent worker pool, token-bucket rate limiting, cancellation, and SSRF protection	Launch Orbit
Portfolio	Interactive project showcase with motion, parallax, and NUTECH attribution	View Portfolio

System Highlights

Signal Room

• Persistent Gorilla WebSocket connections
• Goroutine-powered broadcast hub
• Live user presence and system events
• Bounded message history and heartbeat pings
• Automatic client reconnection

Keyline Workspace

• Registration and login with bcrypt password hashing
• Signed 24-hour JWT access tokens
• Gin authentication middleware
• Isolated task resources for each user
• Complete create, read, update, and delete workflow

Orbit Crawler

• Bounded concurrent worker pool
• Token-bucket request rate limiting
• Same-origin crawl discovery
• Context cancellation and request timeouts
• Private-network and redirect protections
• Live crawl telemetry interface

Architecture

PFAI/
├── chat/          Gorilla WebSocket server + embedded Signal Room UI
├── auth-api/      Gin JWT REST API + embedded Keyline UI
├── crawler/       Concurrent crawler + embedded Orbit UI
├── portfolio/     Interactive project showcase
├── render.yaml    Render deployment configuration
└── run-all.ps1    Local launcher for all Go services

Each Go application embeds its frontend assets into the compiled binary, making it portable and easy to deploy.

Run Locally

Requirements:

• Go 1.24 or newer
• PowerShell for the optional combined launcher

Launch everything:

.\run-all.ps1

Or run each application independently:

cd chat
go run .
# http://localhost:8081

cd ../auth-api
go run .
# http://localhost:8082

cd ../crawler
go run .
# http://localhost:8083

Serve the portfolio with any static HTTP server:

cd portfolio
python -m http.server 4173

Verification

cd chat; go test ./...; go build ./...
cd ../auth-api; go test ./...; go build ./...
cd ../crawler; go test ./...; go build ./...

The production release was verified with:

• Two-client public WebSocket message delivery
• JWT registration, authentication, and secured task CRUD
• Concurrent crawling against public websites
• Responsive desktop and mobile portfolio rendering

Deployment

Service	Platform	URL
Portfolio	Vercel	https://pfai-go-lab.vercel.app
Signal Room	Render	https://pfai-signal-chat.onrender.com
Keyline Workspace	Vercel Go Runtime	https://pfai-keyline.vercel.app
Orbit Crawler	Vercel Go Runtime	https://pfai-orbit.vercel.app

Signal Room runs on Render because WebSocket servers require a persistent process. Keyline currently uses an in-memory course-project store, so production data can reset when a Vercel instance is replaced.

Author

Anas
National University of Technology, Islamabad
Advanced Go Practice · 2026

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Built with Go, careful engineering, and a strong preference for excellent visual design.