Refactor: Rename NanoKVM to BatchuKVM and update server URL

server/service/application/version.go

@@ -0,0 +1,89 @@
+package application
+
+import (
+	"NanoKVM-Server/proto"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	log "github.com/sirupsen/logrus"
+)
+
+type Latest struct {
+	Version string `json:"version"`
+	Name    string `json:"name"`
+	Sha512  string `json:"sha512"`
+	Size    uint   `json:"size"`
+	Url     string `json:"url"`
+}
+
+func (s *Service) GetVersion(c *gin.Context) {
+	var rsp proto.Response
+
+	// current version
+	currentVersion := "1.0.0"
+
+	versionFile := fmt.Sprintf("%s/version", AppDir)
+	if version, err := os.ReadFile(versionFile); err == nil {
+		currentVersion = strings.ReplaceAll(string(version), "\n", "")
+	}
+
+	log.Debugf("current version: %s", currentVersion)
+
+	// latest version
+	latest, err := getLatest()
+	if err != nil {
+		rsp.ErrRsp(c, -1, "get latest version failed")
+		return
+	}
+
+	rsp.OkRspWithData(c, &proto.GetVersionRsp{
+		Current: currentVersion,
+		Latest:  latest.Version,
+	})
+}
+
+func getLatest() (*Latest, error) {
+	baseURL := StableURL
+	if isPreviewEnabled() {
+		baseURL = PreviewURL
+	}
+
+	url := fmt.Sprintf("%s/latest.json?now=%d", baseURL, time.Now().Unix())
+
+	resp, err := http.Get(url)
+	if err != nil {
+		log.Debugf("failed to request version: %v", err)
+		return nil, err
+	}
+	defer func() {
+		_ = resp.Body.Close()
+	}()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		log.Errorf("failed to read response: %v", err)
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Errorf("server responded with status code: %d", resp.StatusCode)
+		return nil, fmt.Errorf("status code %d", resp.StatusCode)
+	}
+
+	var latest Latest
+	if err := json.Unmarshal(body, &latest); err != nil {
+		log.Errorf("failed to unmarshal response: %s", err)
+		return nil, err
+	}
+
+	latest.Url = fmt.Sprintf("%s/%s", baseURL, latest.Name)
+
+	log.Debugf("get application latest version: %s", latest.Version)
+	return &latest, nil
+}