third_party/zlib/google/zip.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "third_party/zlib/google/zip.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/bind.h"
  11 #include "base/files/file.h"
  12 #include "base/files/file_enumerator.h"
  13 #include "base/logging.h"
  14 #include "base/strings/string16.h"
  15 #include "base/strings/string_util.h"
  16 #include "third_party/zlib/google/zip_internal.h"
  17 #include "third_party/zlib/google/zip_reader.h"
  18
  19 #if defined(USE_SYSTEM_MINIZIP)
  20 #include <minizip/unzip.h>
  21 #include <minizip/zip.h>
  22 #else
  23 #include "third_party/zlib/contrib/minizip/unzip.h"
  24 #include "third_party/zlib/contrib/minizip/zip.h"
  25 #endif
  26
  27 namespace {
  28
  29 bool AddFileToZip(zipFile zip_file, const base::FilePath& src_dir) {
  30   base::File file(src_dir, base::File::FLAG_OPEN | base::File::FLAG_READ);
  31   if (!file.IsValid()) {
  32     DLOG(ERROR) << "Could not open file for path " << src_dir.value();
  33     return false;
  34   }
  35
  36   int num_bytes;
  37   char buf[zip::internal::kZipBufSize];
  38   do {
  39     num_bytes = file.ReadAtCurrentPos(buf, zip::internal::kZipBufSize);
  40     if (num_bytes > 0) {
  41       if (ZIP_OK != zipWriteInFileInZip(zip_file, buf, num_bytes)) {
  42         DLOG(ERROR) << "Could not write data to zip for path "
  43                     << src_dir.value();
  44         return false;
  45       }
  46     }
  47   } while (num_bytes > 0);
  48
  49   return true;
  50 }
  51
  52 bool AddEntryToZip(zipFile zip_file, const base::FilePath& path,
  53                    const base::FilePath& root_path) {
  54   base::FilePath relative_path;
  55   bool result = root_path.AppendRelativePath(path, &relative_path);
  56   DCHECK(result);
  57   std::string str_path = relative_path.AsUTF8Unsafe();
  58 #if defined(OS_WIN)
  59   ReplaceSubstringsAfterOffset(&str_path, 0u, "\\", "/");
  60 #endif
  61
  62   bool is_directory = base::DirectoryExists(path);
  63   if (is_directory)
  64     str_path += "/";
  65
  66   zip_fileinfo file_info = zip::internal::GetFileInfoForZipping(path);
  67   if (!zip::internal::ZipOpenNewFileInZip(zip_file, str_path, &file_info))
  68     return false;
  69
  70   bool success = true;
  71   if (!is_directory) {
  72     success = AddFileToZip(zip_file, path);
  73   }
  74
  75   if (ZIP_OK != zipCloseFileInZip(zip_file)) {
  76     DLOG(ERROR) << "Could not close zip file entry " << str_path;
  77     return false;
  78   }
  79
  80   return success;
  81 }
  82
  83 bool ExcludeNoFilesFilter(const base::FilePath& file_path) {
  84   return true;
  85 }
  86
  87 bool ExcludeHiddenFilesFilter(const base::FilePath& file_path) {
  88   return file_path.BaseName().value()[0] != '.';
  89 }
  90
  91 }  // namespace
  92
  93 namespace zip {
  94
  95 bool Unzip(const base::FilePath& src_file, const base::FilePath& dest_dir) {
  96   ZipReader reader;
  97   if (!reader.Open(src_file)) {
  98     DLOG(WARNING) << "Failed to open " << src_file.value();
  99     return false;
 100   }
 101   while (reader.HasMore()) {
 102     if (!reader.OpenCurrentEntryInZip()) {
 103       DLOG(WARNING) << "Failed to open the current file in zip";
 104       return false;
 105     }
 106     if (reader.current_entry_info()->is_unsafe()) {
 107       DLOG(WARNING) << "Found an unsafe file in zip "
 108                     << reader.current_entry_info()->file_path().value();
 109       return false;
 110     }
 111     if (!reader.ExtractCurrentEntryIntoDirectory(dest_dir)) {
 112       DLOG(WARNING) << "Failed to extract "
 113                     << reader.current_entry_info()->file_path().value();
 114       return false;
 115     }
 116     if (!reader.AdvanceToNextEntry()) {
 117       DLOG(WARNING) << "Failed to advance to the next file";
 118       return false;
 119     }
 120   }
 121   return true;
 122 }
 123
 124 bool ZipWithFilterCallback(const base::FilePath& src_dir,
 125                            const base::FilePath& dest_file,
 126                            const FilterCallback& filter_cb) {
 127   DCHECK(base::DirectoryExists(src_dir));
 128
 129   zipFile zip_file = internal::OpenForZipping(dest_file.AsUTF8Unsafe(),
 130                                               APPEND_STATUS_CREATE);
 131
 132   if (!zip_file) {
 133     DLOG(WARNING) << "couldn't create file " << dest_file.value();
 134     return false;
 135   }
 136
 137   bool success = true;
 138   base::FileEnumerator file_enumerator(src_dir, true /* recursive */,
 139       base::FileEnumerator::FILES | base::FileEnumerator::DIRECTORIES);
 140   for (base::FilePath path = file_enumerator.Next(); !path.value().empty();
 141        path = file_enumerator.Next()) {
 142     if (!filter_cb.Run(path)) {
 143       continue;
 144     }
 145
 146     if (!AddEntryToZip(zip_file, path, src_dir)) {
 147       success = false;
 148       break;
 149     }
 150   }
 151
 152   if (ZIP_OK != zipClose(zip_file, NULL)) {
 153     DLOG(ERROR) << "Error closing zip file " << dest_file.value();
 154     return false;
 155   }
 156
 157   return success;
 158 }
 159
 160 bool Zip(const base::FilePath& src_dir, const base::FilePath& dest_file,
 161          bool include_hidden_files) {
 162   if (include_hidden_files) {
 163     return ZipWithFilterCallback(
 164         src_dir, dest_file, base::Bind(&ExcludeNoFilesFilter));
 165   } else {
 166     return ZipWithFilterCallback(
 167         src_dir, dest_file, base::Bind(&ExcludeHiddenFilesFilter));
 168   }
 169 }
 170
 171 #if defined(OS_POSIX)
 172 bool ZipFiles(const base::FilePath& src_dir,
 173               const std::vector<base::FilePath>& src_relative_paths,
 174               int dest_fd) {
 175   DCHECK(base::DirectoryExists(src_dir));
 176   zipFile zip_file = internal::OpenFdForZipping(dest_fd, APPEND_STATUS_CREATE);
 177
 178   if (!zip_file) {
 179     DLOG(ERROR) << "couldn't create file for fd " << dest_fd;
 180     return false;
 181   }
 182
 183   bool success = true;
 184   for (std::vector<base::FilePath>::const_iterator iter =
 185            src_relative_paths.begin();
 186       iter != src_relative_paths.end(); ++iter) {
 187     const base::FilePath& path = src_dir.Append(*iter);
 188     if (!AddEntryToZip(zip_file, path, src_dir)) {
 189       // TODO(hshi): clean up the partial zip file when error occurs.
 190       success = false;
 191       break;
 192     }
 193   }
 194
 195   if (ZIP_OK != zipClose(zip_file, NULL)) {
 196     DLOG(ERROR) << "Error closing zip file for fd " << dest_fd;
 197     success = false;
 198   }
 199
 200   return success;
 201 }
 202 #endif  // defined(OS_POSIX)
 203
 204 }  // namespace zip