FastCheck - Website Health Check

CLI tool to concurrently check website availability with SSL verification and latency measurement.

Features

• Concurrent status checks (goroutines)
• HTTP/HTTPS support with custom timeout
• SSL certificate validation
• Response latency measurement
• JSON export for automation
• Color-coded terminal output

Installation

git clone https://github.com/alonsofritz/url-fastcheck-cli
cd url-fastcheck-cli
go build -o fastcheck

Usage

Basic check:

./fastcheck --file urls.txt

Advanced options:

./fastcheck --file urls.txt --ssl --timeout 3 --output results.json

Sample Output

Stack

• Concurrency: Goroutines + WaitGroup
• Networking: net/http, crypto/tls
• CLI: flag package
• Data: JSON encoding

Improvements

• In production, use a worker pool (e.g., semaphore.Weighted) (Implement WorkerPool)
• DNS Cache: Implement a custom resolver for repeated lookups
• Connection Pooling: Reuse HTTP clients using http.Transport