Add Dns Record Into Hosts

– 2025-08-22

• 重新写了一个，添加了日志记录，换了一个免费的网站，还不必申请API。希望可以多用用，如果好用就捐赠一点。

#!/bin/ash

# Set the domains
DOMAINS="api.themoviedb.org pf.us.dell.com github.com objects.githubusercontent.com"
LOG_FILE="/var/log/dnschecker.log"

log() {
    MSG="$1"
    echo "$MSG" | tee -a "$LOG_FILE"
}

update_hosts() {
    domain=$1
    log "🔍 Checking DNS records for $domain ..."

    # Perform DNS lookup using new API (with timeout)
    API_RESPONSE=$(wget -qO- --timeout=10 "https://networkcalc.com/api/dns/lookup/$domain")

    # Check if API response is empty
    if [ -z "$API_RESPONSE" ]; then
        log "⚠️  Failed to fetch DNS records for $domain (empty response). Skipping."
        return
    fi

    # Check API status
    STATUS=$(echo "$API_RESPONSE" | jq -r '.status')
    if [ "$STATUS" != "OK" ]; then
        log "⚠️  API returned error for $domain (status=$STATUS). Skipping."
        return
    fi

    # Parse JSON response to extract A and AAAA records
    A_RECORDS=$(echo "$API_RESPONSE" | jq -r '.records.A[]?.address')
    AAAA_RECORDS=$(echo "$API_RESPONSE" | jq -r '.records.AAAA[]?.address')

    # If no records found, skip
    if [ -z "$A_RECORDS" ] && [ -z "$AAAA_RECORDS" ]; then
        log "⚠️  No A/AAAA records found for $domain. Skipping."
        return
    fi

    # Remove existing records for the domain
    sed -i "/$domain/d" /etc/myhosts

    # Create or append to /etc/myhosts file with a timestamp
    TIMESTAMP=$(date +"%Y-%m-%d %H:%M:%S")
    log "# DNS records for $domain (Updated: $TIMESTAMP)."

    for IP in $A_RECORDS; do
        echo "$IP $domain" | tee -a /etc/myhosts | tee -a "$LOG_FILE" >/dev/null
    done

    for IPV6 in $AAAA_RECORDS; do
        echo "$IPV6 $domain" | tee -a /etc/myhosts | tee -a "$LOG_FILE" >/dev/null
    done

    log "✅ DNS records for $domain added to /etc/myhosts"
}

# Rotate log if bigger than 1MB
if [ -f "$LOG_FILE" ] && [ $(stat -c%s "$LOG_FILE") -gt 1048576 ]; then
    mv "$LOG_FILE" "$LOG_FILE.$(date +%Y%m%d%H%M%S)"
    touch "$LOG_FILE"
fi

# Iterate over each domain and update /etc/myhosts
for domain in $DOMAINS; do
    update_hosts "$domain"
done

——————-破网站开始收费了———————————————————————-

通过 https://api.api-ninjas.com/v1/dnslookup 查询DNS解析，并写入/etc/hosts

因为我这个是放在openwrt里面，所以第一行是/bin/ash

API KEY可以自己申请

DOMAINS填写自己需要的,支持多域名，空格分开即可。

#!/bin/ash

# Set the domain and API key
DOMAINS="api.themoviedb.org themoviedb.org"
API_KEY="Your API Key"

update_hosts() {
# Perform DNS lookup using API
API_RESPONSE=$(wget --header="X-Api-Key:$API_KEY" "https://api.api-ninjas.com/v1/dnslookup?domain=$domain" -O-)

# Parse JSON response to extract DNS records
A_RECORDS=$(echo "$API_RESPONSE" | jq -r '.[] | select(.record_type == "A") | .value')
AAAA_RECORDS=$(echo "$API_RESPONSE" | jq -r '.[] | select(.record_type == "AAAA") | .value')

sed -i "/$domain/d" /etc/hosts

# Create or append to /etc/hosts file with a timestamp
TIMESTAMP=$(date +"%Y-%m-%d %H:%M:%S")
# Create or append to /etc/hosts file
echo "# DNS records for $domain (Updated: $TIMESTAMP)." | tee -a /etc/hosts
for IP in $A_RECORDS; do
    echo "$IP $domain" | tee -a /etc/hosts
done

for IPV6 in $AAAA_RECORDS; do
    echo "$IPV6 $domain" | tee -a /etc/hosts
done

echo "DNS records added to /etc/hosts (Updated: $TIMESTAMP)."
}
# Iterate over each domain and update /etc/hosts
for domain in $DOMAINS; do
    update_hosts "$domain"
done