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#!/usr/bin/env bash
set -euo pipefail
N="${1:-1000}"
DELAY_SEC="${DELAY_SEC:-0}"
URL_FILE="${2:-urls.txt}"
if [[ ! -f "$URL_FILE" ]]; then
echo "Error: File '$URL_FILE' not found." >&2
exit 1
fi
mapfile -t URLS < <(grep -vE '^\s*(#|$)' "$URL_FILE")
if [[ ${#URLS[@]} -eq 0 ]]; then
echo "Error: No valid URLs found in $URL_FILE" >&2
exit 1
fi
pick_url() {
shuf -n 1 "$URL_FILE"
}
if [[ ! "$N" =~ ^[0-9]+$ ]] || (( N <= 0 )); then
echo "Usage: $0 N (N must be a positive integer)" >&2
exit 2
fi
ok=0
fail=0
for i in $(seq 1 "$N"); do
url="$(pick_url)"
code="$(
curl -sS -o /dev/null -L --max-time 3 -w '%{http_code}' \
-A "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36" \
"$url" || echo 000
)"
if [[ "$code" =~ ^[23] ]]; then
((++ok))
else
((++fail))
fi
printf "[%03d/%03d] %s -> HTTP %s\n" "$i" "$N" "$url" "$code"
sleep "$DELAY_SEC"
done
echo "Done. ok=$ok fail=$fail"
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