Fixed memory leaking

+ Patch on memory leaking for Windows netstat module (do not effect any of the previous non Windows builds)
+ Fixed potential memory leak in acme handler logic
+ Added "do you want to get a TLS certificate for this subdomain?" dialog when a new subdomain proxy rule is created

src/mod/dynamicproxy/dpcore/dpcore.go

@@ -14,10 +14,6 @@ import (
 
 var onExitFlushLoop func()
 
-const (
-	defaultTimeout = time.Minute * 5
-)
-
 // ReverseProxy is an HTTP Handler that takes an incoming request and
 // sends it to another server, proxying the response back to the
 // client, support http, also support https tunnel using http.hijacker

src/mod/dynamicproxy/proxyRequestHandler.go

@@ -183,6 +183,5 @@ func (h *ProxyHandler) logRequest(r *http.Request, succ bool, statusCode int, fo
 			}
 			h.Parent.Option.StatisticCollector.RecordRequest(requestInfo)
 		}()
-
 	}
 }

src/mod/netstat/netstat.go

@@ -213,6 +213,7 @@ func GetNetworkInterfaceStats() (int64, int64, error) {
 			out, err := cmd.Output()
 			if err != nil {
 				callbackChan <- wmicResult{0, 0, err}
+				return
 			}
 
 			//Filter out the first line
@@ -251,18 +252,16 @@ func GetNetworkInterfaceStats() (int64, int64, error) {
 
 		go func() {
 			//Spawn a timer to terminate the cmd process if timeout
-			var timer *time.Timer
-			timer = time.AfterFunc(3*time.Second, func() {
-				timer.Stop()
-				if cmd != nil && cmd.Process != nil {
-					cmd.Process.Kill()
-				}
+			time.Sleep(3 * time.Second)
+			if cmd != nil && cmd.Process != nil {
+				cmd.Process.Kill()
 				callbackChan <- wmicResult{0, 0, errors.New("wmic execution timeout")}
-			})
+			}
 		}()
 
 		result := wmicResult{}
 		result = <-callbackChan
+		cmd = nil
 		if result.Err != nil {
 			log.Println("Unable to extract NIC info from wmic: " + result.Err.Error())
 		}

src/mod/uptime/uptime.go

@@ -93,8 +93,6 @@ func (m *Monitor) ExecuteUptimeCheck() {
 				Latency:    laterncy,
 			}
 
-			//fmt.Println(thisRecord)
-
 		} else {
 			log.Println("Unknown protocol: " + target.Protocol + ". Skipping")
 			continue
@@ -238,9 +236,11 @@ func getWebsiteStatus(url string) (int, error) {
 			}
 			return 0, err
 		}
-
+		defer resp.Body.Close()
+		status_code := resp.StatusCode
+		return status_code, nil
 	}
+	defer resp.Body.Close()
 	status_code := resp.StatusCode
-	resp.Body.Close()
 	return status_code, nil
 }

src/mod/utils/utils.go

@@ -1,10 +1,7 @@
 package utils
 
 import (
-	"bufio"
-	"encoding/base64"
 	"errors"
-	"io"
 	"log"
 	"net/http"
 	"os"
@@ -131,17 +128,6 @@ func TimeToString(targetTime time.Time) string {
 	return targetTime.Format("2006-01-02 15:04:05")
 }
 
-func LoadImageAsBase64(filepath string) (string, error) {
-	if !FileExists(filepath) {
-		return "", errors.New("File not exists")
-	}
-	f, _ := os.Open(filepath)
-	reader := bufio.NewReader(f)
-	content, _ := io.ReadAll(reader)
-	encoded := base64.StdEncoding.EncodeToString(content)
-	return string(encoded), nil
-}
-
 // Use for redirections
 func ConstructRelativePathFromRequestURL(requestURI string, redirectionLocation string) string {
 	if strings.Count(requestURI, "/") == 1 {