chrome/browser/file_select_helper.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 "chrome/browser/file_select_helper.h"
   6
   7 #include <string>
   8 #include <utility>
   9
  10 #include "base/bind.h"
  11 #include "base/files/file_enumerator.h"
  12 #include "base/files/file_util.h"
  13 #include "base/strings/string_split.h"
  14 #include "base/strings/string_util.h"
  15 #include "base/strings/utf_string_conversions.h"
  16 #include "chrome/browser/browser_process.h"
  17 #include "chrome/browser/platform_util.h"
  18 #include "chrome/browser/profiles/profile.h"
  19 #include "chrome/browser/profiles/profile_manager.h"
  20 #include "chrome/browser/ui/browser.h"
  21 #include "chrome/browser/ui/browser_list.h"
  22 #include "chrome/browser/ui/chrome_select_file_policy.h"
  23 #include "chrome/grit/generated_resources.h"
  24 #include "content/public/browser/browser_thread.h"
  25 #include "content/public/browser/notification_details.h"
  26 #include "content/public/browser/notification_source.h"
  27 #include "content/public/browser/notification_types.h"
  28 #include "content/public/browser/render_view_host.h"
  29 #include "content/public/browser/render_widget_host_view.h"
  30 #include "content/public/browser/web_contents.h"
  31 #include "content/public/common/file_chooser_file_info.h"
  32 #include "content/public/common/file_chooser_params.h"
  33 #include "net/base/mime_util.h"
  34 #include "ui/base/l10n/l10n_util.h"
  35 #include "ui/shell_dialogs/selected_file_info.h"
  36
  37 #if defined(OS_CHROMEOS)
  38 #include "chrome/browser/chromeos/file_manager/fileapi_util.h"
  39 #include "content/public/browser/site_instance.h"
  40 #endif
  41
  42 using content::BrowserThread;
  43 using content::FileChooserParams;
  44 using content::RenderViewHost;
  45 using content::RenderWidgetHost;
  46 using content::WebContents;
  47
  48 namespace {
  49
  50 // There is only one file-selection happening at any given time,
  51 // so we allocate an enumeration ID for that purpose.  All IDs from
  52 // the renderer must start at 0 and increase.
  53 const int kFileSelectEnumerationId = -1;
  54
  55 // Converts a list of FilePaths to a list of ui::SelectedFileInfo.
  56 std::vector<ui::SelectedFileInfo> FilePathListToSelectedFileInfoList(
  57     const std::vector<base::FilePath>& paths) {
  58   std::vector<ui::SelectedFileInfo> selected_files;
  59   for (size_t i = 0; i < paths.size(); ++i) {
  60     selected_files.push_back(
  61         ui::SelectedFileInfo(paths[i], paths[i]));
  62   }
  63   return selected_files;
  64 }
  65
  66 void DeleteFiles(const std::vector<base::FilePath>& paths) {
  67   for (auto& file_path : paths)
  68     base::DeleteFile(file_path, false);
  69 }
  70
  71 bool IsValidProfile(Profile* profile) {
  72   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  73   return g_browser_process->profile_manager()->IsValidProfile(profile);
  74 }
  75
  76 }  // namespace
  77
  78 struct FileSelectHelper::ActiveDirectoryEnumeration {
  79   ActiveDirectoryEnumeration() : rvh_(NULL) {}
  80
  81   scoped_ptr<DirectoryListerDispatchDelegate> delegate_;
  82   scoped_ptr<net::DirectoryLister> lister_;
  83   RenderViewHost* rvh_;
  84   std::vector<base::FilePath> results_;
  85 };
  86
  87 FileSelectHelper::FileSelectHelper(Profile* profile)
  88     : profile_(profile),
  89       render_view_host_(NULL),
  90       web_contents_(NULL),
  91       select_file_dialog_(),
  92       select_file_types_(),
  93       dialog_type_(ui::SelectFileDialog::SELECT_OPEN_FILE),
  94       dialog_mode_(FileChooserParams::Open) {
  95 }
  96
  97 FileSelectHelper::~FileSelectHelper() {
  98   // There may be pending file dialogs, we need to tell them that we've gone
  99   // away so they don't try and call back to us.
 100   if (select_file_dialog_.get())
 101     select_file_dialog_->ListenerDestroyed();
 102
 103   // Stop any pending directory enumeration, prevent a callback, and free
 104   // allocated memory.
 105   std::map<int, ActiveDirectoryEnumeration*>::iterator iter;
 106   for (iter = directory_enumerations_.begin();
 107        iter != directory_enumerations_.end();
 108        ++iter) {
 109     iter->second->lister_.reset();
 110     delete iter->second;
 111   }
 112 }
 113
 114 void FileSelectHelper::DirectoryListerDispatchDelegate::OnListFile(
 115     const net::DirectoryLister::DirectoryListerData& data) {
 116   parent_->OnListFile(id_, data);
 117 }
 118
 119 void FileSelectHelper::DirectoryListerDispatchDelegate::OnListDone(int error) {
 120   parent_->OnListDone(id_, error);
 121 }
 122
 123 void FileSelectHelper::FileSelected(const base::FilePath& path,
 124                                     int index, void* params) {
 125   FileSelectedWithExtraInfo(ui::SelectedFileInfo(path, path), index, params);
 126 }
 127
 128 void FileSelectHelper::FileSelectedWithExtraInfo(
 129     const ui::SelectedFileInfo& file,
 130     int index,
 131     void* params) {
 132   if (IsValidProfile(profile_))
 133     profile_->set_last_selected_directory(file.file_path.DirName());
 134
 135   if (!render_view_host_) {
 136     RunFileChooserEnd();
 137     return;
 138   }
 139
 140   const base::FilePath& path = file.local_path;
 141   if (dialog_type_ == ui::SelectFileDialog::SELECT_UPLOAD_FOLDER) {
 142     StartNewEnumeration(path, kFileSelectEnumerationId, render_view_host_);
 143     return;
 144   }
 145
 146   std::vector<ui::SelectedFileInfo> files;
 147   files.push_back(file);
 148
 149 #if defined(OS_MACOSX) && !defined(OS_IOS)
 150   content::BrowserThread::PostTask(
 151       content::BrowserThread::FILE_USER_BLOCKING,
 152       FROM_HERE,
 153       base::Bind(&FileSelectHelper::ProcessSelectedFilesMac, this, files));
 154 #else
 155   NotifyRenderViewHostAndEnd(files);
 156 #endif  // defined(OS_MACOSX) && !defined(OS_IOS)
 157 }
 158
 159 void FileSelectHelper::MultiFilesSelected(
 160     const std::vector<base::FilePath>& files,
 161     void* params) {
 162   std::vector<ui::SelectedFileInfo> selected_files =
 163       FilePathListToSelectedFileInfoList(files);
 164
 165   MultiFilesSelectedWithExtraInfo(selected_files, params);
 166 }
 167
 168 void FileSelectHelper::MultiFilesSelectedWithExtraInfo(
 169     const std::vector<ui::SelectedFileInfo>& files,
 170     void* params) {
 171   if (!files.empty() && IsValidProfile(profile_))
 172     profile_->set_last_selected_directory(files[0].file_path.DirName());
 173
 174 #if defined(OS_MACOSX) && !defined(OS_IOS)
 175   content::BrowserThread::PostTask(
 176       content::BrowserThread::FILE_USER_BLOCKING,
 177       FROM_HERE,
 178       base::Bind(&FileSelectHelper::ProcessSelectedFilesMac, this, files));
 179 #else
 180   NotifyRenderViewHostAndEnd(files);
 181 #endif  // defined(OS_MACOSX) && !defined(OS_IOS)
 182 }
 183
 184 void FileSelectHelper::FileSelectionCanceled(void* params) {
 185   NotifyRenderViewHostAndEnd(std::vector<ui::SelectedFileInfo>());
 186 }
 187
 188 void FileSelectHelper::StartNewEnumeration(const base::FilePath& path,
 189                                            int request_id,
 190                                            RenderViewHost* render_view_host) {
 191   scoped_ptr<ActiveDirectoryEnumeration> entry(new ActiveDirectoryEnumeration);
 192   entry->rvh_ = render_view_host;
 193   entry->delegate_.reset(new DirectoryListerDispatchDelegate(this, request_id));
 194   entry->lister_.reset(new net::DirectoryLister(
 195       path, net::DirectoryLister::NO_SORT_RECURSIVE, entry->delegate_.get()));
 196   if (!entry->lister_->Start()) {
 197     if (request_id == kFileSelectEnumerationId)
 198       FileSelectionCanceled(NULL);
 199     else
 200       render_view_host->DirectoryEnumerationFinished(request_id,
 201                                                      entry->results_);
 202   } else {
 203     directory_enumerations_[request_id] = entry.release();
 204   }
 205 }
 206
 207 void FileSelectHelper::OnListFile(
 208     int id,
 209     const net::DirectoryLister::DirectoryListerData& data) {
 210   ActiveDirectoryEnumeration* entry = directory_enumerations_[id];
 211
 212   // Directory upload only cares about files.
 213   if (data.info.IsDirectory())
 214     return;
 215
 216   entry->results_.push_back(data.path);
 217 }
 218
 219 void FileSelectHelper::OnListDone(int id, int error) {
 220   // This entry needs to be cleaned up when this function is done.
 221   scoped_ptr<ActiveDirectoryEnumeration> entry(directory_enumerations_[id]);
 222   directory_enumerations_.erase(id);
 223   if (!entry->rvh_)
 224     return;
 225   if (error) {
 226     FileSelectionCanceled(NULL);
 227     return;
 228   }
 229
 230   std::vector<ui::SelectedFileInfo> selected_files =
 231       FilePathListToSelectedFileInfoList(entry->results_);
 232
 233   if (id == kFileSelectEnumerationId) {
 234     NotifyRenderViewHostAndEnd(selected_files);
 235   } else {
 236     entry->rvh_->DirectoryEnumerationFinished(id, entry->results_);
 237     EnumerateDirectoryEnd();
 238   }
 239 }
 240
 241 void FileSelectHelper::NotifyRenderViewHostAndEnd(
 242     const std::vector<ui::SelectedFileInfo>& files) {
 243   if (!render_view_host_) {
 244     RunFileChooserEnd();
 245     return;
 246   }
 247
 248 #if defined(OS_CHROMEOS)
 249   if (!files.empty()) {
 250     if (!IsValidProfile(profile_)) {
 251       RunFileChooserEnd();
 252       return;
 253     }
 254     // Converts |files| into FileChooserFileInfo with handling of non-native
 255     // files.
 256     file_manager::util::ConvertSelectedFileInfoListToFileChooserFileInfoList(
 257         file_manager::util::GetFileSystemContextForRenderViewHost(
 258             profile_, render_view_host_),
 259         web_contents_->GetSiteInstance()->GetSiteURL(),
 260         files,
 261         base::Bind(
 262             &FileSelectHelper::NotifyRenderViewHostAndEndAfterConversion,
 263             this));
 264     return;
 265   }
 266 #endif  // defined(OS_CHROMEOS)
 267
 268   std::vector<content::FileChooserFileInfo> chooser_files;
 269   for (const auto& file : files) {
 270     content::FileChooserFileInfo chooser_file;
 271     chooser_file.file_path = file.local_path;
 272     chooser_file.display_name = file.display_name;
 273     chooser_files.push_back(chooser_file);
 274   }
 275
 276   NotifyRenderViewHostAndEndAfterConversion(chooser_files);
 277 }
 278
 279 void FileSelectHelper::NotifyRenderViewHostAndEndAfterConversion(
 280     const std::vector<content::FileChooserFileInfo>& list) {
 281   if (render_view_host_)
 282     render_view_host_->FilesSelectedInChooser(list, dialog_mode_);
 283
 284   // No members should be accessed from here on.
 285   RunFileChooserEnd();
 286 }
 287
 288 void FileSelectHelper::DeleteTemporaryFiles() {
 289   BrowserThread::PostTask(BrowserThread::FILE,
 290                           FROM_HERE,
 291                           base::Bind(&DeleteFiles, temporary_files_));
 292   temporary_files_.clear();
 293 }
 294
 295 scoped_ptr<ui::SelectFileDialog::FileTypeInfo>
 296 FileSelectHelper::GetFileTypesFromAcceptType(
 297     const std::vector<base::string16>& accept_types) {
 298   scoped_ptr<ui::SelectFileDialog::FileTypeInfo> base_file_type(
 299       new ui::SelectFileDialog::FileTypeInfo());
 300   if (accept_types.empty())
 301     return base_file_type.Pass();
 302
 303   // Create FileTypeInfo and pre-allocate for the first extension list.
 304   scoped_ptr<ui::SelectFileDialog::FileTypeInfo> file_type(
 305       new ui::SelectFileDialog::FileTypeInfo(*base_file_type));
 306   file_type->include_all_files = true;
 307   file_type->extensions.resize(1);
 308   std::vector<base::FilePath::StringType>* extensions =
 309       &file_type->extensions.back();
 310
 311   // Find the corresponding extensions.
 312   int valid_type_count = 0;
 313   int description_id = 0;
 314   for (size_t i = 0; i < accept_types.size(); ++i) {
 315     std::string ascii_type = base::UTF16ToASCII(accept_types[i]);
 316     if (!IsAcceptTypeValid(ascii_type))
 317       continue;
 318
 319     size_t old_extension_size = extensions->size();
 320     if (ascii_type[0] == '.') {
 321       // If the type starts with a period it is assumed to be a file extension
 322       // so we just have to add it to the list.
 323       base::FilePath::StringType ext(ascii_type.begin(), ascii_type.end());
 324       extensions->push_back(ext.substr(1));
 325     } else {
 326       if (ascii_type == "image/*")
 327         description_id = IDS_IMAGE_FILES;
 328       else if (ascii_type == "audio/*")
 329         description_id = IDS_AUDIO_FILES;
 330       else if (ascii_type == "video/*")
 331         description_id = IDS_VIDEO_FILES;
 332
 333       net::GetExtensionsForMimeType(ascii_type, extensions);
 334     }
 335
 336     if (extensions->size() > old_extension_size)
 337       valid_type_count++;
 338   }
 339
 340   // If no valid extension is added, bail out.
 341   if (valid_type_count == 0)
 342     return base_file_type.Pass();
 343
 344   // Use a generic description "Custom Files" if either of the following is
 345   // true:
 346   // 1) There're multiple types specified, like "audio/*,video/*"
 347   // 2) There're multiple extensions for a MIME type without parameter, like
 348   //    "ehtml,shtml,htm,html" for "text/html". On Windows, the select file
 349   //    dialog uses the first extension in the list to form the description,
 350   //    like "EHTML Files". This is not what we want.
 351   if (valid_type_count > 1 ||
 352       (valid_type_count == 1 && description_id == 0 && extensions->size() > 1))
 353     description_id = IDS_CUSTOM_FILES;
 354
 355   if (description_id) {
 356     file_type->extension_description_overrides.push_back(
 357         l10n_util::GetStringUTF16(description_id));
 358   }
 359
 360   return file_type.Pass();
 361 }
 362
 363 // static
 364 void FileSelectHelper::RunFileChooser(content::WebContents* tab,
 365                                       const FileChooserParams& params) {
 366   Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
 367   // FileSelectHelper will keep itself alive until it sends the result message.
 368   scoped_refptr<FileSelectHelper> file_select_helper(
 369       new FileSelectHelper(profile));
 370   file_select_helper->RunFileChooser(tab->GetRenderViewHost(), tab, params);
 371 }
 372
 373 // static
 374 void FileSelectHelper::EnumerateDirectory(content::WebContents* tab,
 375                                           int request_id,
 376                                           const base::FilePath& path) {
 377   Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
 378   // FileSelectHelper will keep itself alive until it sends the result message.
 379   scoped_refptr<FileSelectHelper> file_select_helper(
 380       new FileSelectHelper(profile));
 381   file_select_helper->EnumerateDirectory(
 382       request_id, tab->GetRenderViewHost(), path);
 383 }
 384
 385 void FileSelectHelper::RunFileChooser(RenderViewHost* render_view_host,
 386                                       content::WebContents* web_contents,
 387                                       const FileChooserParams& params) {
 388   DCHECK(!render_view_host_);
 389   DCHECK(!web_contents_);
 390   render_view_host_ = render_view_host;
 391   web_contents_ = web_contents;
 392   notification_registrar_.RemoveAll();
 393   notification_registrar_.Add(this,
 394                               content::NOTIFICATION_RENDER_VIEW_HOST_CHANGED,
 395                               content::Source<WebContents>(web_contents_));
 396   notification_registrar_.Add(
 397       this,
 398       content::NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
 399       content::Source<RenderWidgetHost>(render_view_host_));
 400   notification_registrar_.Add(
 401       this, content::NOTIFICATION_WEB_CONTENTS_DESTROYED,
 402       content::Source<WebContents>(web_contents_));
 403
 404   BrowserThread::PostTask(
 405       BrowserThread::FILE, FROM_HERE,
 406       base::Bind(&FileSelectHelper::RunFileChooserOnFileThread, this, params));
 407
 408   // Because this class returns notifications to the RenderViewHost, it is
 409   // difficult for callers to know how long to keep a reference to this
 410   // instance. We AddRef() here to keep the instance alive after we return
 411   // to the caller, until the last callback is received from the file dialog.
 412   // At that point, we must call RunFileChooserEnd().
 413   AddRef();
 414 }
 415
 416 void FileSelectHelper::RunFileChooserOnFileThread(
 417     const FileChooserParams& params) {
 418   select_file_types_ = GetFileTypesFromAcceptType(params.accept_types);
 419   select_file_types_->support_drive = !params.need_local_path;
 420
 421   BrowserThread::PostTask(
 422       BrowserThread::UI, FROM_HERE,
 423       base::Bind(&FileSelectHelper::RunFileChooserOnUIThread, this, params));
 424 }
 425
 426 void FileSelectHelper::RunFileChooserOnUIThread(
 427     const FileChooserParams& params) {
 428   if (!render_view_host_ || !web_contents_ || !IsValidProfile(profile_)) {
 429     // If the renderer was destroyed before we started, just cancel the
 430     // operation.
 431     RunFileChooserEnd();
 432     return;
 433   }
 434
 435   select_file_dialog_ = ui::SelectFileDialog::Create(
 436       this, new ChromeSelectFilePolicy(web_contents_));
 437   if (!select_file_dialog_.get())
 438     return;
 439
 440   dialog_mode_ = params.mode;
 441   switch (params.mode) {
 442     case FileChooserParams::Open:
 443       dialog_type_ = ui::SelectFileDialog::SELECT_OPEN_FILE;
 444       break;
 445     case FileChooserParams::OpenMultiple:
 446       dialog_type_ = ui::SelectFileDialog::SELECT_OPEN_MULTI_FILE;
 447       break;
 448     case FileChooserParams::UploadFolder:
 449       dialog_type_ = ui::SelectFileDialog::SELECT_UPLOAD_FOLDER;
 450       break;
 451     case FileChooserParams::Save:
 452       dialog_type_ = ui::SelectFileDialog::SELECT_SAVEAS_FILE;
 453       break;
 454     default:
 455       // Prevent warning.
 456       dialog_type_ = ui::SelectFileDialog::SELECT_OPEN_FILE;
 457       NOTREACHED();
 458   }
 459
 460   base::FilePath default_file_name = params.default_file_name.IsAbsolute() ?
 461       params.default_file_name :
 462       profile_->last_selected_directory().Append(params.default_file_name);
 463
 464   gfx::NativeWindow owning_window =
 465       platform_util::GetTopLevel(render_view_host_->GetView()->GetNativeView());
 466
 467 #if defined(OS_ANDROID)
 468   // Android needs the original MIME types and an additional capture value.
 469   std::pair<std::vector<base::string16>, bool> accept_types =
 470       std::make_pair(params.accept_types, params.capture);
 471 #endif
 472
 473   select_file_dialog_->SelectFile(
 474       dialog_type_,
 475       params.title,
 476       default_file_name,
 477       select_file_types_.get(),
 478       select_file_types_.get() && !select_file_types_->extensions.empty()
 479           ? 1
 480           : 0,  // 1-based index of default extension to show.
 481       base::FilePath::StringType(),
 482       owning_window,
 483 #if defined(OS_ANDROID)
 484       &accept_types);
 485 #else
 486       NULL);
 487 #endif
 488
 489   select_file_types_.reset();
 490 }
 491
 492 // This method is called when we receive the last callback from the file
 493 // chooser dialog. Perform any cleanup and release the reference we added
 494 // in RunFileChooser().
 495 void FileSelectHelper::RunFileChooserEnd() {
 496   // If there are temporary files, then this instance needs to stick around
 497   // until web_contents_ is destroyed, so that this instance can delete the
 498   // temporary files.
 499   if (!temporary_files_.empty())
 500     return;
 501
 502   render_view_host_ = NULL;
 503   web_contents_ = NULL;
 504   Release();
 505 }
 506
 507 void FileSelectHelper::EnumerateDirectory(int request_id,
 508                                           RenderViewHost* render_view_host,
 509                                           const base::FilePath& path) {
 510
 511   // Because this class returns notifications to the RenderViewHost, it is
 512   // difficult for callers to know how long to keep a reference to this
 513   // instance. We AddRef() here to keep the instance alive after we return
 514   // to the caller, until the last callback is received from the enumeration
 515   // code. At that point, we must call EnumerateDirectoryEnd().
 516   AddRef();
 517   StartNewEnumeration(path, request_id, render_view_host);
 518 }
 519
 520 // This method is called when we receive the last callback from the enumeration
 521 // code. Perform any cleanup and release the reference we added in
 522 // EnumerateDirectory().
 523 void FileSelectHelper::EnumerateDirectoryEnd() {
 524   Release();
 525 }
 526
 527 void FileSelectHelper::Observe(int type,
 528                                const content::NotificationSource& source,
 529                                const content::NotificationDetails& details) {
 530   switch (type) {
 531     case content::NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED: {
 532       DCHECK(content::Source<RenderWidgetHost>(source).ptr() ==
 533              render_view_host_);
 534       render_view_host_ = NULL;
 535       break;
 536     }
 537
 538     case content::NOTIFICATION_WEB_CONTENTS_DESTROYED: {
 539       DCHECK(content::Source<WebContents>(source).ptr() == web_contents_);
 540       web_contents_ = NULL;
 541     }
 542
 543     // Intentional fall through.
 544     case content::NOTIFICATION_RENDER_VIEW_HOST_CHANGED:
 545       if (!temporary_files_.empty()) {
 546         DeleteTemporaryFiles();
 547
 548         // Now that the temporary files have been scheduled for deletion, there
 549         // is no longer any reason to keep this instance around.
 550         Release();
 551       }
 552
 553       break;
 554
 555     default:
 556       NOTREACHED();
 557   }
 558 }
 559
 560 // static
 561 bool FileSelectHelper::IsAcceptTypeValid(const std::string& accept_type) {
 562   // TODO(raymes): This only does some basic checks, extend to test more cases.
 563   // A 1 character accept type will always be invalid (either a "." in the case
 564   // of an extension or a "/" in the case of a MIME type).
 565   std::string unused;
 566   if (accept_type.length() <= 1 ||
 567       base::StringToLowerASCII(accept_type) != accept_type ||
 568       base::TrimWhitespaceASCII(accept_type, base::TRIM_ALL, &unused) !=
 569           base::TRIM_NONE) {
 570     return false;
 571   }
 572   return true;
 573 }