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#!/usr/bin/env bash
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# get-public-ip: query several IP services in random order and print the first result
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set -euo pipefail
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get_public_ip() {
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local -a urls=(
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"https://ifconfig.co/ip"
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"https://api64.ipify.org"
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"https://ipecho.net/plain"
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)
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local ip=""
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local i=0
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local j=0
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local tmp=""
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# Fisher–Yates shuffle to randomize order
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for ((i=${#urls[@]}-1; i>0; i--)); do
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j=$((RANDOM % (i + 1)))
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tmp=${urls[i]}
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urls[i]=${urls[j]}
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urls[j]=$tmp
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done
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# Try each provider in random order until one works
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for url in "${urls[@]}"; do
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# Suppress curl error messages
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if ip=$(curl -fsS --max-time 10 "$url" 2>/dev/null); then
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printf '%s\n' "$ip"
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return 0
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fi
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done
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return 1
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}
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if ! get_public_ip; then
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echo "get-public-ip: failed to get public IP from all providers" >&2
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exit 1
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fi
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