v2.0.0.0000

src/compression.go

@@ -0,0 +1,148 @@
+package src
+
+import (
+	"archive/zip"
+	"bytes"
+	"compress/gzip"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func zipFiles(sourceFiles []string, target string) error {
+
+	zipfile, err := os.Create(target)
+	if err != nil {
+		return err
+	}
+	defer zipfile.Close()
+
+	archive := zip.NewWriter(zipfile)
+	defer archive.Close()
+
+	for _, source := range sourceFiles {
+
+		info, err := os.Stat(source)
+		if err != nil {
+			return nil
+		}
+
+		var baseDir string
+		if info.IsDir() {
+			baseDir = filepath.Base(System.Folder.Data)
+		}
+
+		filepath.Walk(source, func(path string, info os.FileInfo, err error) error {
+
+			if err != nil {
+				return err
+			}
+
+			header, err := zip.FileInfoHeader(info)
+			if err != nil {
+				return err
+			}
+
+			if baseDir != "" {
+				header.Name = filepath.Join(strings.TrimPrefix(path, System.Folder.Config))
+			}
+
+			if info.IsDir() {
+				header.Name += string(os.PathSeparator)
+			} else {
+				header.Method = zip.Deflate
+			}
+
+			writer, err := archive.CreateHeader(header)
+			if err != nil {
+				return err
+			}
+
+			if info.IsDir() {
+				return nil
+			}
+
+			file, err := os.Open(path)
+			if err != nil {
+				return err
+			}
+			defer file.Close()
+
+			_, err = io.Copy(writer, file)
+
+			return err
+
+		})
+
+	}
+
+	return err
+}
+
+func extractZIP(archive, target string) (err error) {
+
+	reader, err := zip.OpenReader(archive)
+	if err != nil {
+		return err
+	}
+
+	if err := os.MkdirAll(target, 0755); err != nil {
+		return err
+	}
+
+	for _, file := range reader.File {
+
+		path := filepath.Join(target, file.Name)
+		if file.FileInfo().IsDir() {
+			os.MkdirAll(path, file.Mode())
+			continue
+		}
+
+		fileReader, err := file.Open()
+		if err != nil {
+			return err
+		}
+		defer fileReader.Close()
+
+		targetFile, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, file.Mode())
+		if err != nil {
+			return err
+		}
+		defer targetFile.Close()
+
+		if _, err := io.Copy(targetFile, fileReader); err != nil {
+			return err
+		}
+
+	}
+
+	return
+}
+
+func extractGZIP(gzipBody []byte, fileSource string) (body []byte, err error) {
+
+	var b = bytes.NewBuffer(gzipBody)
+
+	var r io.Reader
+	r, err = gzip.NewReader(b)
+	if err != nil {
+		// Keine gzip Datei
+		body = gzipBody
+		err = nil
+		return
+	}
+
+	showInfo("Extract gzip:" + fileSource)
+
+	var resB bytes.Buffer
+	_, err = resB.ReadFrom(r)
+	if err != nil {
+		body = gzipBody
+		err = nil
+		return
+	}
+
+	body = resB.Bytes()
+	return
+}