163 lines
3.8 KiB
Go
163 lines
3.8 KiB
Go
package handler
|
||
|
||
import (
|
||
"encoding/base64"
|
||
"fmt"
|
||
"net"
|
||
"os/exec"
|
||
"strings"
|
||
"time"
|
||
|
||
"github.com/gin-gonic/gin"
|
||
)
|
||
|
||
func handleDns(c *gin.Context, url string, params map[string]interface{}) {
|
||
// 获取seq参数
|
||
seq := ""
|
||
if seqVal, ok := params["seq"].(string); ok {
|
||
seq = seqVal
|
||
}
|
||
|
||
// 获取dig类型参数
|
||
digType := ""
|
||
if dt, ok := params["dt"].(string); ok {
|
||
digType = dt
|
||
}
|
||
|
||
// 获取DNS服务器参数
|
||
dnsServer := ""
|
||
if ds, ok := params["ds"].(string); ok {
|
||
dnsServer = ds
|
||
}
|
||
|
||
// 解析URL，提取hostname
|
||
hostname := url
|
||
if strings.HasPrefix(url, "http://") || strings.HasPrefix(url, "https://") {
|
||
parts := strings.Split(url, "//")
|
||
if len(parts) > 1 {
|
||
hostParts := strings.Split(parts[1], "/")
|
||
hostname = hostParts[0]
|
||
if idx := strings.Index(hostname, ":"); idx != -1 {
|
||
hostname = hostname[:idx]
|
||
}
|
||
}
|
||
}
|
||
|
||
// 准备结果
|
||
result := map[string]interface{}{
|
||
"seq": seq,
|
||
"type": "ceDns",
|
||
"requrl": hostname,
|
||
"ips": []interface{}{},
|
||
"cnames": []interface{}{},
|
||
}
|
||
|
||
// 构建dig命令
|
||
args := []string{hostname}
|
||
if digType != "" {
|
||
args = append([]string{"-t", digType}, args...)
|
||
}
|
||
if dnsServer != "" {
|
||
args = append([]string{"@" + dnsServer}, args...)
|
||
}
|
||
|
||
cmd := exec.Command("dig", args...)
|
||
output, err := cmd.CombinedOutput()
|
||
outputStr := string(output)
|
||
|
||
// 编码完整输出为base64（header字段）
|
||
result["header"] = base64.StdEncoding.EncodeToString([]byte(outputStr))
|
||
|
||
if err != nil {
|
||
result["error"] = err.Error()
|
||
c.JSON(200, result)
|
||
return
|
||
}
|
||
|
||
// 解析dig输出
|
||
lines := strings.Split(outputStr, "\n")
|
||
inAnswerSection := false
|
||
ipList := make([]map[string]interface{}, 0)
|
||
cnameList := make([]map[string]interface{}, 0)
|
||
|
||
for _, line := range lines {
|
||
line = strings.TrimSpace(line)
|
||
if strings.Contains(line, "ANSWER SECTION") {
|
||
inAnswerSection = true
|
||
continue
|
||
}
|
||
if inAnswerSection {
|
||
if line == "" {
|
||
break
|
||
}
|
||
// 解析dig输出行，格式如：example.com. 300 IN A 192.168.1.1
|
||
// 或者：www.baidu.com. 430 IN CNAME www.a.shifen.com.
|
||
parts := strings.Fields(line)
|
||
if len(parts) >= 5 {
|
||
// parts[0] = 域名
|
||
// parts[1] = TTL
|
||
// parts[2] = "IN" (class)
|
||
// parts[3] = 记录类型 (A, AAAA, CNAME等)
|
||
// parts[4] = 记录值
|
||
recordClass := parts[3] // A, AAAA, CNAME等
|
||
recordValue := ""
|
||
if len(parts) >= 5 {
|
||
recordValue = strings.Join(parts[4:], " ")
|
||
// 移除值末尾的点（如果有）
|
||
recordValue = strings.TrimSuffix(recordValue, ".")
|
||
}
|
||
|
||
domain := strings.TrimSuffix(parts[0], ".") // 移除域名末尾的点
|
||
|
||
// 分别处理A/AAAA记录和CNAME记录
|
||
if recordClass == "A" || recordClass == "AAAA" {
|
||
ipItem := map[string]interface{}{
|
||
"url": domain,
|
||
"type": recordClass,
|
||
"ip": recordValue,
|
||
}
|
||
ipList = append(ipList, ipItem)
|
||
} else if recordClass == "CNAME" {
|
||
cnameItem := map[string]interface{}{
|
||
"url": domain,
|
||
"type": recordClass,
|
||
"cname": recordValue, // CNAME值
|
||
}
|
||
cnameList = append(cnameList, cnameItem)
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// 如果没有从dig输出解析到IP，尝试使用net.LookupIP
|
||
if len(ipList) == 0 {
|
||
start := time.Now()
|
||
ips, err := net.LookupIP(hostname)
|
||
lookupTime := time.Since(start)
|
||
|
||
if err == nil {
|
||
for _, ip := range ips {
|
||
ipType := "A"
|
||
if ip.To4() == nil {
|
||
ipType = "AAAA"
|
||
}
|
||
ipItem := map[string]interface{}{
|
||
"url": hostname,
|
||
"type": ipType,
|
||
"ip": ip.String(),
|
||
}
|
||
ipList = append(ipList, ipItem)
|
||
}
|
||
// 更新header，包含lookup时间信息
|
||
lookupInfo := fmt.Sprintf("Lookup time: %v\n", lookupTime)
|
||
result["header"] = base64.StdEncoding.EncodeToString([]byte(outputStr + lookupInfo))
|
||
} else {
|
||
result["error"] = err.Error()
|
||
}
|
||
}
|
||
|
||
result["ips"] = ipList
|
||
result["cnames"] = cnameList
|
||
c.JSON(200, result)
|
||
}
|