11

pkg/update/update.go

@@ -0,0 +1,253 @@
+package update
+
+import (
+	"archive/tar"
+	"archive/zip"
+	"compress/gzip"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"time"
+)
+
+// GetArchiveExt 根据 URL 获取压缩包扩展名
+func GetArchiveExt(url string) string {
+	if strings.HasSuffix(url, ".tar.gz") {
+		return ".tar.gz"
+	}
+	if strings.HasSuffix(url, ".zip") {
+		return ".zip"
+	}
+	// 默认根据平台
+	if runtime.GOOS == "windows" {
+		return ".zip"
+	}
+	return ".tar.gz"
+}
+
+// ExtractArchive 解压压缩包
+func ExtractArchive(archivePath, destDir string) error {
+	if strings.HasSuffix(archivePath, ".tar.gz") {
+		return ExtractTarGz(archivePath, destDir)
+	}
+	if strings.HasSuffix(archivePath, ".zip") {
+		return ExtractZip(archivePath, destDir)
+	}
+	return fmt.Errorf("unsupported archive format")
+}
+
+// ExtractTarGz 解压 tar.gz 文件
+func ExtractTarGz(archivePath, destDir string) error {
+	file, err := os.Open(archivePath)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	gzReader, err := gzip.NewReader(file)
+	if err != nil {
+		return err
+	}
+	defer gzReader.Close()
+
+	tarReader := tar.NewReader(gzReader)
+
+	for {
+		header, err := tarReader.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return err
+		}
+
+		targetPath := filepath.Join(destDir, header.Name)
+
+		switch header.Typeflag {
+		case tar.TypeDir:
+			if err := os.MkdirAll(targetPath, 0755); err != nil {
+				return err
+			}
+		case tar.TypeReg:
+			outFile, err := os.Create(targetPath)
+			if err != nil {
+				return err
+			}
+			if _, err := io.Copy(outFile, tarReader); err != nil {
+				outFile.Close()
+				return err
+			}
+			outFile.Close()
+		}
+	}
+
+	return nil
+}
+
+// ExtractZip 解压 zip 文件
+func ExtractZip(archivePath, destDir string) error {
+	reader, err := zip.OpenReader(archivePath)
+	if err != nil {
+		return err
+	}
+	defer reader.Close()
+
+	for _, file := range reader.File {
+		targetPath := filepath.Join(destDir, file.Name)
+
+		if file.FileInfo().IsDir() {
+			if err := os.MkdirAll(targetPath, 0755); err != nil {
+				return err
+			}
+			continue
+		}
+
+		if err := os.MkdirAll(filepath.Dir(targetPath), 0755); err != nil {
+			return err
+		}
+
+		srcFile, err := file.Open()
+		if err != nil {
+			return err
+		}
+
+		dstFile, err := os.Create(targetPath)
+		if err != nil {
+			srcFile.Close()
+			return err
+		}
+
+		_, err = io.Copy(dstFile, srcFile)
+		srcFile.Close()
+		dstFile.Close()
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// FindExtractedBinary 在解压目录中查找可执行文件
+func FindExtractedBinary(extractDir, component string) (string, error) {
+	var binaryPath string
+	prefix := "gotunnel-" + component
+
+	err := filepath.Walk(extractDir, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if info.IsDir() {
+			return nil
+		}
+
+		name := info.Name()
+		// 匹配 gotunnel-server-* 或 gotunnel-client-*
+		if strings.HasPrefix(name, prefix) {
+			// 排除压缩包本身
+			if !strings.HasSuffix(name, ".tar.gz") && !strings.HasSuffix(name, ".zip") {
+				binaryPath = path
+				return filepath.SkipAll
+			}
+		}
+		return nil
+	})
+
+	if err != nil && err != filepath.SkipAll {
+		return "", err
+	}
+
+	if binaryPath == "" {
+		return "", fmt.Errorf("binary not found in archive")
+	}
+
+	return binaryPath, nil
+}
+
+// CopyFile 复制文件
+func CopyFile(src, dst string) error {
+	srcFile, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer srcFile.Close()
+
+	dstFile, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer dstFile.Close()
+
+	_, err = io.Copy(dstFile, srcFile)
+	return err
+}
+
+// DownloadFile 下载文件
+func DownloadFile(url, dest string) error {
+	client := &http.Client{Timeout: 10 * time.Minute}
+	resp, err := client.Get(url)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("download failed: %s", resp.Status)
+	}
+
+	out, err := os.Create(dest)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	_, err = io.Copy(out, resp.Body)
+	return err
+}
+
+// DownloadAndExtract 下载并解压压缩包，返回解压后的可执行文件路径
+func DownloadAndExtract(downloadURL, component string) (binaryPath string, cleanup func(), err error) {
+	tempDir := os.TempDir()
+	timestamp := time.Now().Format("20060102150405")
+	archivePath := filepath.Join(tempDir, "gotunnel_update_"+timestamp+GetArchiveExt(downloadURL))
+
+	if err := DownloadFile(downloadURL, archivePath); err != nil {
+		return "", nil, fmt.Errorf("download update: %w", err)
+	}
+
+	extractDir := filepath.Join(tempDir, "gotunnel_extract_"+timestamp)
+	if err := os.MkdirAll(extractDir, 0755); err != nil {
+		os.Remove(archivePath)
+		return "", nil, fmt.Errorf("create extract dir: %w", err)
+	}
+
+	cleanup = func() {
+		os.Remove(archivePath)
+		os.RemoveAll(extractDir)
+	}
+
+	if err := ExtractArchive(archivePath, extractDir); err != nil {
+		cleanup()
+		return "", nil, fmt.Errorf("extract archive: %w", err)
+	}
+
+	binaryPath, err = FindExtractedBinary(extractDir, component)
+	if err != nil {
+		cleanup()
+		return "", nil, fmt.Errorf("find binary: %w", err)
+	}
+
+	// 设置执行权限
+	if runtime.GOOS != "windows" {
+		if err := os.Chmod(binaryPath, 0755); err != nil {
+			cleanup()
+			return "", nil, fmt.Errorf("chmod: %w", err)
+		}
+	}
+
+	return binaryPath, cleanup, nil
+}