BASH

Simple HTTP URL Health Check

Perform a quick health check on any HTTP/HTTPS URL using curl in Bash, verifying response status and connectivity for web services.

#!/bin/bash

# Default URL
URL=""

# Parse arguments
while [[ "$#" -gt 0 ]]; do
    case "$1" in
        -u|--url) URL="$2"; shift ;;
        *) echo "Unknown parameter passed: $1"; exit 1 ;;
    esac
    shift
done

if [ -z "$URL" ]; then
    echo "Usage: $0 -u <URL>"
    echo "Example: $0 -u https://www.google.com"
    exit 1
fi

echo "Checking health of: $URL"

# Use curl to get HTTP status code
HTTP_STATUS=$(curl -s -o /dev/null -w "%{http_code}" "$URL")

if [ "$HTTP_STATUS" -ge 200 ] && [ "$HTTP_STATUS" -lt 300 ]; then
    echo "Health check PASSED: $URL returned HTTP status $HTTP_STATUS"
    exit 0
else
    echo "Health check FAILED: $URL returned HTTP status $HTTP_STATUS"
    exit 1
fi

How it works: This script performs a basic health check for a given URL using `curl`. It extracts the HTTP status code and checks if it falls within the successful range (2xx). The script requires a URL as an argument (`-u` or `--url`) and exits with a status of 0 for success or 1 for failure, making it suitable for simple checks in CI/CD pipelines, pre-deployment verification, or quick troubleshooting of web services without implementing complex monitoring systems.

Simple HTTP URL Health Check

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