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364 lines
8.5 KiB
364 lines
8.5 KiB
// Copyright 2013 Unknown
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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package zip
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import (
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"archive/zip"
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"fmt"
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"io"
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"os"
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"path"
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"path/filepath"
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"strings"
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"github.com/Unknwon/cae"
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)
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// Switcher of printing trace information when pack and extract.
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var Verbose = true
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// extractFile extracts zip.File to file system.
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func extractFile(f *zip.File, destPath string) error {
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filePath := path.Join(destPath, f.Name)
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os.MkdirAll(path.Dir(filePath), os.ModePerm)
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rc, err := f.Open()
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if err != nil {
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return err
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}
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defer rc.Close()
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fw, err := os.Create(filePath)
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if err != nil {
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return err
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}
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defer fw.Close()
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if _, err = io.Copy(fw, rc); err != nil {
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return err
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}
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// Skip symbolic links.
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if f.FileInfo().Mode()&os.ModeSymlink != 0 {
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return nil
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}
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// Set back file information.
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if err = os.Chtimes(filePath, f.ModTime(), f.ModTime()); err != nil {
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return err
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}
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return os.Chmod(filePath, f.FileInfo().Mode())
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}
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var defaultExtractFunc = func(fullName string, fi os.FileInfo) error {
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if !Verbose {
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return nil
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}
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fmt.Println("Extracting file..." + fullName)
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return nil
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}
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// ExtractToFunc extracts the whole archive or the given files to the
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// specified destination.
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// It accepts a function as a middleware for custom operations.
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func (z *ZipArchive) ExtractToFunc(destPath string, fn cae.HookFunc, entries ...string) (err error) {
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destPath = strings.Replace(destPath, "\\", "/", -1)
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isHasEntry := len(entries) > 0
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if Verbose {
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fmt.Println("Unzipping " + z.FileName + "...")
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}
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os.MkdirAll(destPath, os.ModePerm)
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for _, f := range z.File {
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f.Name = strings.Replace(f.Name, "\\", "/", -1)
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// Directory.
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if strings.HasSuffix(f.Name, "/") {
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if isHasEntry {
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if cae.IsEntry(f.Name, entries) {
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if err = fn(f.Name, f.FileInfo()); err != nil {
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continue
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}
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os.MkdirAll(path.Join(destPath, f.Name), os.ModePerm)
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}
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continue
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}
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if err = fn(f.Name, f.FileInfo()); err != nil {
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continue
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}
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os.MkdirAll(path.Join(destPath, f.Name), os.ModePerm)
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continue
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}
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// File.
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if isHasEntry {
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if cae.IsEntry(f.Name, entries) {
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if err = fn(f.Name, f.FileInfo()); err != nil {
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continue
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}
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err = extractFile(f, destPath)
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}
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} else {
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if err = fn(f.Name, f.FileInfo()); err != nil {
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continue
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}
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err = extractFile(f, destPath)
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}
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if err != nil {
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return err
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}
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}
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return nil
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}
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// ExtractToFunc extracts the whole archive or the given files to the
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// specified destination.
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// It accepts a function as a middleware for custom operations.
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func ExtractToFunc(srcPath, destPath string, fn cae.HookFunc, entries ...string) (err error) {
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z, err := Open(srcPath)
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if err != nil {
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return err
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}
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defer z.Close()
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return z.ExtractToFunc(destPath, fn, entries...)
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}
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// ExtractTo extracts the whole archive or the given files to the
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// specified destination.
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// Call Flush() to apply changes before this.
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func (z *ZipArchive) ExtractTo(destPath string, entries ...string) (err error) {
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return z.ExtractToFunc(destPath, defaultExtractFunc, entries...)
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}
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// ExtractTo extracts given archive or the given files to the
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// specified destination.
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func ExtractTo(srcPath, destPath string, entries ...string) (err error) {
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return ExtractToFunc(srcPath, destPath, defaultExtractFunc, entries...)
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}
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// extractFile extracts file from ZipArchive to file system.
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func (z *ZipArchive) extractFile(f *File) error {
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if !z.isHasWriter {
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for _, zf := range z.ReadCloser.File {
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if f.Name == zf.Name {
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return extractFile(zf, path.Dir(f.tmpPath))
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}
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}
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}
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return cae.Copy(f.tmpPath, f.absPath)
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}
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// Flush saves changes to original zip file if any.
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func (z *ZipArchive) Flush() error {
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if !z.isHasChanged || (z.ReadCloser == nil && !z.isHasWriter) {
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return nil
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}
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// Extract to tmp path and pack back.
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tmpPath := path.Join(os.TempDir(), "cae", path.Base(z.FileName))
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os.RemoveAll(tmpPath)
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defer os.RemoveAll(tmpPath)
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for _, f := range z.files {
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if strings.HasSuffix(f.Name, "/") {
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os.MkdirAll(path.Join(tmpPath, f.Name), os.ModePerm)
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continue
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}
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// Relative path inside zip temporary changed.
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f.tmpPath = path.Join(tmpPath, f.Name)
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if err := z.extractFile(f); err != nil {
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return err
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}
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}
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if z.isHasWriter {
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return packToWriter(tmpPath, z.writer, defaultPackFunc, true)
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}
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if err := PackTo(tmpPath, z.FileName); err != nil {
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return err
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}
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return z.Open(z.FileName, os.O_RDWR|os.O_TRUNC, z.Permission)
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}
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// packFile packs a file or directory to zip.Writer.
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func packFile(srcFile string, recPath string, zw *zip.Writer, fi os.FileInfo) error {
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if fi.IsDir() {
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fh, err := zip.FileInfoHeader(fi)
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if err != nil {
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return err
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}
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fh.Name = recPath + "/"
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if _, err = zw.CreateHeader(fh); err != nil {
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return err
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}
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} else {
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fh, err := zip.FileInfoHeader(fi)
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if err != nil {
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return err
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}
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fh.Name = recPath
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fh.Method = zip.Deflate
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fw, err := zw.CreateHeader(fh)
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if err != nil {
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return err
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}
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if fi.Mode()&os.ModeSymlink != 0 {
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target, err := os.Readlink(srcFile)
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if err != nil {
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return err
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}
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if _, err = fw.Write([]byte(target)); err != nil {
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return err
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}
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} else {
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f, err := os.Open(srcFile)
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if err != nil {
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return err
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}
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defer f.Close()
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if _, err = io.Copy(fw, f); err != nil {
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return err
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}
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}
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}
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return nil
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}
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// packDir packs a directory and its subdirectories and files
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// recursively to zip.Writer.
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func packDir(srcPath string, recPath string, zw *zip.Writer, fn cae.HookFunc) error {
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dir, err := os.Open(srcPath)
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if err != nil {
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return err
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}
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defer dir.Close()
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fis, err := dir.Readdir(0)
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if err != nil {
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return err
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}
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for _, fi := range fis {
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if cae.IsFilter(fi.Name()) {
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continue
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}
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curPath := srcPath + "/" + fi.Name()
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tmpRecPath := filepath.Join(recPath, fi.Name())
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if err = fn(curPath, fi); err != nil {
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continue
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}
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if fi.IsDir() {
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if err = packFile(srcPath, tmpRecPath, zw, fi); err != nil {
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return err
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}
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err = packDir(curPath, tmpRecPath, zw, fn)
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} else {
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err = packFile(curPath, tmpRecPath, zw, fi)
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}
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if err != nil {
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return err
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}
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}
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return nil
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}
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// packToWriter packs given path object to io.Writer.
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func packToWriter(srcPath string, w io.Writer, fn func(fullName string, fi os.FileInfo) error, includeDir bool) error {
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zw := zip.NewWriter(w)
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defer zw.Close()
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f, err := os.Open(srcPath)
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if err != nil {
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return err
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}
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defer f.Close()
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fi, err := f.Stat()
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if err != nil {
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return err
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}
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basePath := path.Base(srcPath)
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if fi.IsDir() {
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if includeDir {
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if err = packFile(srcPath, basePath, zw, fi); err != nil {
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return err
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}
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} else {
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basePath = ""
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}
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return packDir(srcPath, basePath, zw, fn)
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}
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return packFile(srcPath, basePath, zw, fi)
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}
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// packTo packs given source path object to target path.
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func packTo(srcPath, destPath string, fn cae.HookFunc, includeDir bool) error {
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fw, err := os.Create(destPath)
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if err != nil {
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return err
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}
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defer fw.Close()
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return packToWriter(srcPath, fw, fn, includeDir)
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}
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// PackToFunc packs the complete archive to the specified destination.
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// It accepts a function as a middleware for custom operations.
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func PackToFunc(srcPath, destPath string, fn func(fullName string, fi os.FileInfo) error, includeDir ...bool) error {
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isIncludeDir := false
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if len(includeDir) > 0 && includeDir[0] {
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isIncludeDir = true
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}
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return packTo(srcPath, destPath, fn, isIncludeDir)
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}
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var defaultPackFunc = func(fullName string, fi os.FileInfo) error {
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if !Verbose {
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return nil
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}
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if fi.IsDir() {
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fmt.Printf("Adding dir...%s\n", fullName)
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} else {
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fmt.Printf("Adding file...%s\n", fullName)
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}
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return nil
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}
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// PackTo packs the whole archive to the specified destination.
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// Call Flush() will automatically call this in the end.
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func PackTo(srcPath, destPath string, includeDir ...bool) error {
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return PackToFunc(srcPath, destPath, defaultPackFunc, includeDir...)
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}
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// Close opens or creates archive and save changes.
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func (z *ZipArchive) Close() (err error) {
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if err = z.Flush(); err != nil {
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return err
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}
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if z.ReadCloser != nil {
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if err = z.ReadCloser.Close(); err != nil {
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return err
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}
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z.ReadCloser = nil
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}
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return nil
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}
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