47 lines
853 B
Go
47 lines
853 B
Go
package util
|
|
|
|
import (
|
|
"encoding/base64"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
|
|
"github.com/miekg/dns"
|
|
)
|
|
|
|
func ResolveHTTPS(msg *dns.Msg, server string) (*dns.Msg, error) {
|
|
httpR := &http.Client{}
|
|
buf, err := msg.Pack()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
query := server + "?dns=" + base64.RawURLEncoding.EncodeToString(buf)
|
|
req, err := http.NewRequest("GET", query, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
req.Header.Set("Accept", "application/dns-message")
|
|
|
|
res, err := httpR.Do(req)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer res.Body.Close()
|
|
|
|
if res.StatusCode != http.StatusOK {
|
|
return nil, fmt.Errorf("bad HTTP Request: %d", res.StatusCode)
|
|
}
|
|
|
|
fullRes, err := io.ReadAll(res.Body)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
response := dns.Msg{}
|
|
err = response.Unpack(fullRes)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &response, nil
|
|
|
|
}
|