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| 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 "net/base/directory_lister.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "base/bind.h" | |
| 10 #include "base/files/file_enumerator.h" | |
| 11 #include "base/files/file_util.h" | |
| 12 #include "base/i18n/file_util_icu.h" | |
| 13 #include "base/logging.h" | |
| 14 #include "base/message_loop/message_loop.h" | |
| 15 #include "base/threading/thread_restrictions.h" | |
| 16 #include "base/threading/worker_pool.h" | |
| 17 #include "net/base/net_errors.h" | |
| 18 | |
| 19 namespace net { | |
| 20 | |
| 21 namespace { | |
| 22 | |
| 23 bool IsDotDot(const base::FilePath& path) { | |
| 24 return FILE_PATH_LITERAL("..") == path.BaseName().value(); | |
| 25 } | |
| 26 | |
| 27 // Comparator for sorting lister results. This uses the locale aware filename | |
| 28 // comparison function on the filenames for sorting in the user's locale. | |
| 29 // Static. | |
| 30 bool CompareAlphaDirsFirst(const DirectoryLister::DirectoryListerData& a, | |
| 31 const DirectoryLister::DirectoryListerData& b) { | |
| 32 // Parent directory before all else. | |
| 33 if (IsDotDot(a.info.GetName())) | |
| 34 return true; | |
| 35 if (IsDotDot(b.info.GetName())) | |
| 36 return false; | |
| 37 | |
| 38 // Directories before regular files. | |
| 39 bool a_is_directory = a.info.IsDirectory(); | |
| 40 bool b_is_directory = b.info.IsDirectory(); | |
| 41 if (a_is_directory != b_is_directory) | |
| 42 return a_is_directory; | |
| 43 | |
| 44 return base::i18n::LocaleAwareCompareFilenames(a.info.GetName(), | |
| 45 b.info.GetName()); | |
| 46 } | |
| 47 | |
| 48 bool CompareDate(const DirectoryLister::DirectoryListerData& a, | |
| 49 const DirectoryLister::DirectoryListerData& b) { | |
| 50 // Parent directory before all else. | |
| 51 if (IsDotDot(a.info.GetName())) | |
| 52 return true; | |
| 53 if (IsDotDot(b.info.GetName())) | |
| 54 return false; | |
| 55 | |
| 56 // Directories before regular files. | |
| 57 bool a_is_directory = a.info.IsDirectory(); | |
| 58 bool b_is_directory = b.info.IsDirectory(); | |
| 59 if (a_is_directory != b_is_directory) | |
| 60 return a_is_directory; | |
| 61 return a.info.GetLastModifiedTime() > b.info.GetLastModifiedTime(); | |
| 62 } | |
| 63 | |
| 64 // Comparator for sorting find result by paths. This uses the locale-aware | |
| 65 // comparison function on the filenames for sorting in the user's locale. | |
| 66 // Static. | |
| 67 bool CompareFullPath(const DirectoryLister::DirectoryListerData& a, | |
| 68 const DirectoryLister::DirectoryListerData& b) { | |
| 69 return base::i18n::LocaleAwareCompareFilenames(a.path, b.path); | |
| 70 } | |
| 71 | |
| 72 void SortData(std::vector<DirectoryLister::DirectoryListerData>* data, | |
| 73 DirectoryLister::SortType sort_type) { | |
| 74 // Sort the results. See the TODO below (this sort should be removed and we | |
| 75 // should do it from JS). | |
| 76 if (sort_type == DirectoryLister::DATE) { | |
| 77 std::sort(data->begin(), data->end(), CompareDate); | |
| 78 } else if (sort_type == DirectoryLister::FULL_PATH) { | |
| 79 std::sort(data->begin(), data->end(), CompareFullPath); | |
| 80 } else if (sort_type == DirectoryLister::ALPHA_DIRS_FIRST) { | |
| 81 std::sort(data->begin(), data->end(), CompareAlphaDirsFirst); | |
| 82 } else { | |
| 83 DCHECK_EQ(DirectoryLister::NO_SORT, sort_type); | |
| 84 } | |
| 85 } | |
| 86 | |
| 87 } // namespace | |
| 88 | |
| 89 DirectoryLister::DirectoryLister(const base::FilePath& dir, | |
| 90 DirectoryListerDelegate* delegate) | |
| 91 : delegate_(delegate) { | |
| 92 core_ = new Core(dir, false, ALPHA_DIRS_FIRST, this); | |
| 93 DCHECK(delegate_); | |
| 94 DCHECK(!dir.value().empty()); | |
| 95 } | |
| 96 | |
| 97 DirectoryLister::DirectoryLister(const base::FilePath& dir, | |
| 98 bool recursive, | |
| 99 SortType sort, | |
| 100 DirectoryListerDelegate* delegate) | |
| 101 : delegate_(delegate) { | |
| 102 core_ = new Core(dir, recursive, sort, this); | |
| 103 DCHECK(delegate_); | |
| 104 DCHECK(!dir.value().empty()); | |
| 105 } | |
| 106 | |
| 107 DirectoryLister::~DirectoryLister() { | |
| 108 Cancel(); | |
| 109 } | |
| 110 | |
| 111 bool DirectoryLister::Start() { | |
| 112 return base::WorkerPool::PostTask( | |
| 113 FROM_HERE, | |
| 114 base::Bind(&Core::Start, core_), | |
| 115 true); | |
| 116 } | |
| 117 | |
| 118 void DirectoryLister::Cancel() { | |
| 119 core_->CancelOnOriginThread(); | |
| 120 } | |
| 121 | |
| 122 DirectoryLister::Core::Core(const base::FilePath& dir, | |
| 123 bool recursive, | |
| 124 SortType sort, | |
| 125 DirectoryLister* lister) | |
| 126 : dir_(dir), | |
| 127 recursive_(recursive), | |
| 128 sort_(sort), | |
| 129 origin_loop_(base::MessageLoopProxy::current()), | |
| 130 lister_(lister), | |
| 131 cancelled_(0) { | |
| 132 DCHECK(lister_); | |
| 133 } | |
| 134 | |
| 135 DirectoryLister::Core::~Core() {} | |
| 136 | |
| 137 void DirectoryLister::Core::CancelOnOriginThread() { | |
| 138 DCHECK(origin_loop_->BelongsToCurrentThread()); | |
| 139 | |
| 140 base::subtle::NoBarrier_Store(&cancelled_, 1); | |
| 141 // Core must not call into |lister_| after cancellation, as the |lister_| may | |
| 142 // have been destroyed. Setting |lister_| to NULL ensures any such access will | |
| 143 // cause a crash. | |
| 144 lister_ = nullptr; | |
| 145 } | |
| 146 | |
| 147 void DirectoryLister::Core::Start() { | |
| 148 scoped_ptr<DirectoryList> directory_list(new DirectoryList()); | |
| 149 | |
| 150 if (!base::DirectoryExists(dir_)) { | |
| 151 origin_loop_->PostTask( | |
| 152 FROM_HERE, | |
| 153 base::Bind(&Core::DoneOnOriginThread, this, | |
| 154 base::Passed(directory_list.Pass()), ERR_FILE_NOT_FOUND)); | |
| 155 return; | |
| 156 } | |
| 157 | |
| 158 int types = base::FileEnumerator::FILES | base::FileEnumerator::DIRECTORIES; | |
| 159 if (!recursive_) | |
| 160 types |= base::FileEnumerator::INCLUDE_DOT_DOT; | |
| 161 | |
| 162 base::FileEnumerator file_enum(dir_, recursive_, types); | |
| 163 | |
| 164 base::FilePath path; | |
| 165 while (!(path = file_enum.Next()).empty()) { | |
| 166 // Abort on cancellation. This is purely for performance reasons. | |
| 167 // Correctness guarantees are made by checks in DoneOnOriginThread. | |
| 168 if (IsCancelled()) | |
| 169 return; | |
| 170 | |
| 171 DirectoryListerData data; | |
| 172 data.info = file_enum.GetInfo(); | |
| 173 data.path = path; | |
| 174 directory_list->push_back(data); | |
| 175 | |
| 176 /* TODO(brettw) bug 24107: It would be nice to send incremental updates. | |
| 177 We gather them all so they can be sorted, but eventually the sorting | |
| 178 should be done from JS to give more flexibility in the page. When we do | |
| 179 that, we can uncomment this to send incremental updates to the page. | |
| 180 | |
| 181 const int kFilesPerEvent = 8; | |
| 182 if (file_data.size() < kFilesPerEvent) | |
| 183 continue; | |
| 184 | |
| 185 origin_loop_->PostTask( | |
| 186 FROM_HERE, | |
| 187 base::Bind(&DirectoryLister::Core::SendData, file_data)); | |
| 188 file_data.clear(); | |
| 189 */ | |
| 190 } | |
| 191 | |
| 192 SortData(directory_list.get(), sort_); | |
| 193 | |
| 194 origin_loop_->PostTask( | |
| 195 FROM_HERE, | |
| 196 base::Bind(&Core::DoneOnOriginThread, this, | |
| 197 base::Passed(directory_list.Pass()), OK)); | |
| 198 } | |
| 199 | |
| 200 bool DirectoryLister::Core::IsCancelled() const { | |
| 201 return !!base::subtle::NoBarrier_Load(&cancelled_); | |
| 202 } | |
| 203 | |
| 204 void DirectoryLister::Core::DoneOnOriginThread( | |
| 205 scoped_ptr<DirectoryList> directory_list, int error) const { | |
| 206 DCHECK(origin_loop_->BelongsToCurrentThread()); | |
| 207 | |
| 208 // Need to check if the operation was before first callback. | |
| 209 if (IsCancelled()) | |
| 210 return; | |
| 211 | |
| 212 for (const auto& lister_data : *directory_list) { | |
| 213 lister_->OnListFile(lister_data); | |
| 214 // Need to check if the operation was cancelled during the callback. | |
| 215 if (IsCancelled()) | |
| 216 return; | |
| 217 } | |
| 218 lister_->OnListDone(error); | |
| 219 } | |
| 220 | |
| 221 void DirectoryLister::OnListFile(const DirectoryListerData& data) { | |
| 222 delegate_->OnListFile(data); | |
| 223 } | |
| 224 | |
| 225 void DirectoryLister::OnListDone(int error) { | |
| 226 delegate_->OnListDone(error); | |
| 227 } | |
| 228 | |
| 229 } // namespace net | |
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