The Tor Browser: toolkit/components/downloads/nsDownloadManager.cpp@925c144e1f1f (annotated)

toolkit/components/downloads/nsDownloadManager.cpp@925c144e1f1f (annotated)

toolkit/components/downloads/nsDownloadManager.cpp

Fri, 16 Jan 2015 18:13:44 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Fri, 16 Jan 2015 18:13:44 +0100
branch: TOR_BUG_9701
changeset 14: 925c144e1f1f
permissions: -rw-r--r--

Integrate suggestion from review to improve consistency with existing code.

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "mozilla/DebugOnly.h"
 #include "mozIStorageService.h"
 #include "nsIAlertsService.h"
 #include "nsIArray.h"
 #include "nsIClassInfoImpl.h"
 #include "nsIDOMWindow.h"
 #include "nsIDownloadHistory.h"
 #include "nsIDownloadManagerUI.h"
 #include "nsIMIMEService.h"
 #include "nsIParentalControlsService.h"
 #include "nsIPrefService.h"
 #include "nsIPromptService.h"
 #include "nsIResumableChannel.h"
 #include "nsIWebBrowserPersist.h"
 #include "nsIWindowMediator.h"
 #include "nsILocalFileWin.h"
 #include "nsILoadContext.h"
 #include "nsIXULAppInfo.h"
 #include "nsAppDirectoryServiceDefs.h"
 #include "nsArrayEnumerator.h"
 #include "nsCExternalHandlerService.h"
 #include "nsDirectoryServiceDefs.h"
 #include "nsDownloadManager.h"
 #include "nsNetUtil.h"
 #include "nsThreadUtils.h"
 #include "mozStorageCID.h"
 #include "nsDocShellCID.h"
 #include "nsEmbedCID.h"
 #include "nsToolkitCompsCID.h"
 #include "SQLFunctions.h"
 #include "mozilla/Preferences.h"
 #ifdef XP_WIN
 #include <shlobj.h>
 #include "nsWindowsHelpers.h"
 #ifdef DOWNLOAD_SCANNER
 #include "nsDownloadScanner.h"
 #endif
 #endif
 #ifdef XP_MACOSX
 #include <CoreFoundation/CoreFoundation.h>
 #endif
 #ifdef MOZ_WIDGET_ANDROID
 #include "AndroidBridge.h"
 using namespace mozilla::widget::android;
 #endif
 #ifdef MOZ_WIDGET_GTK
 #include <gtk/gtk.h>
 #endif
 using namespace mozilla;
 using mozilla::downloads::GenerateGUID;
 #define DOWNLOAD_MANAGER_BUNDLE "chrome://mozapps/locale/downloads/downloads.properties"
 #define DOWNLOAD_MANAGER_ALERT_ICON "chrome://mozapps/skin/downloads/downloadIcon.png"
 #define PREF_BD_USEJSTRANSFER "browser.download.useJSTransfer"
 #define PREF_BDM_SHOWALERTONCOMPLETE "browser.download.manager.showAlertOnComplete"
 #define PREF_BDM_SHOWALERTINTERVAL "browser.download.manager.showAlertInterval"
 #define PREF_BDM_RETENTION "browser.download.manager.retention"
 #define PREF_BDM_QUITBEHAVIOR "browser.download.manager.quitBehavior"
 #define PREF_BDM_ADDTORECENTDOCS "browser.download.manager.addToRecentDocs"
 #define PREF_BDM_SCANWHENDONE "browser.download.manager.scanWhenDone"
 #define PREF_BDM_RESUMEONWAKEDELAY "browser.download.manager.resumeOnWakeDelay"
 #define PREF_BH_DELETETEMPFILEONEXIT "browser.helperApps.deleteTempFileOnExit"
 static const int64_t gUpdateInterval = 400 * PR_USEC_PER_MSEC;
 #define DM_SCHEMA_VERSION      9
 #define DM_DB_NAME             NS_LITERAL_STRING("downloads.sqlite")
 #define DM_DB_CORRUPT_FILENAME NS_LITERAL_STRING("downloads.sqlite.corrupt")
 #define NS_SYSTEMINFO_CONTRACTID "@mozilla.org/system-info;1"
 ////////////////////////////////////////////////////////////////////////////////
 //// nsDownloadManager
 NS_IMPL_ISUPPORTS(
   nsDownloadManager
 , nsIDownloadManager
 , nsINavHistoryObserver
 , nsIObserver
 , nsISupportsWeakReference
 )
 nsDownloadManager *nsDownloadManager::gDownloadManagerService = nullptr;
 nsDownloadManager *
 nsDownloadManager::GetSingleton()
 {
   if (gDownloadManagerService) {
     NS_ADDREF(gDownloadManagerService);
     return gDownloadManagerService;
   }
   gDownloadManagerService = new nsDownloadManager();
   if (gDownloadManagerService) {
 #if defined(MOZ_WIDGET_GTK)
     g_type_init();
 #endif
     NS_ADDREF(gDownloadManagerService);
     if (NS_FAILED(gDownloadManagerService->Init()))
       NS_RELEASE(gDownloadManagerService);
   }
   return gDownloadManagerService;
 }
 nsDownloadManager::~nsDownloadManager()
 {
 #ifdef DOWNLOAD_SCANNER
   if (mScanner) {
     delete mScanner;
     mScanner = nullptr;
   }
 #endif
   gDownloadManagerService = nullptr;
 }
 nsresult
 nsDownloadManager::ResumeRetry(nsDownload *aDl)
 {
   // Keep a reference in case we need to cancel the download
   nsRefPtr<nsDownload> dl = aDl;
   // Try to resume the active download
   nsresult rv = dl->Resume();
   // If not, try to retry the download
   if (NS_FAILED(rv)) {
     // First cancel the download so it's no longer active
     rv = dl->Cancel();
     // Then retry it
     if (NS_SUCCEEDED(rv))
       rv = dl->Retry();
   }
   return rv;
 }
 nsresult
 nsDownloadManager::PauseAllDownloads(bool aSetResume)
 {
   nsresult rv = PauseAllDownloads(mCurrentDownloads, aSetResume);
   nsresult rv2 = PauseAllDownloads(mCurrentPrivateDownloads, aSetResume);
   NS_ENSURE_SUCCESS(rv, rv);
   NS_ENSURE_SUCCESS(rv2, rv2);
   return NS_OK;
 }
 nsresult
 nsDownloadManager::PauseAllDownloads(nsCOMArray<nsDownload>& aDownloads, bool aSetResume)
 {
   nsresult retVal = NS_OK;
   for (int32_t i = aDownloads.Count() - 1; i >= 0; --i) {
     nsRefPtr<nsDownload> dl = aDownloads[i];
     // Only pause things that need to be paused
     if (!dl->IsPaused()) {
       // Set auto-resume before pausing so that it gets into the DB
       dl->mAutoResume = aSetResume ? nsDownload::AUTO_RESUME :
                                      nsDownload::DONT_RESUME;
       // Try to pause the download but don't bail now if we fail
       nsresult rv = dl->Pause();
       if (NS_FAILED(rv))
         retVal = rv;
     }
   }
   return retVal;
 }
 nsresult
 nsDownloadManager::ResumeAllDownloads(bool aResumeAll)
 {
   nsresult rv = ResumeAllDownloads(mCurrentDownloads, aResumeAll);
   nsresult rv2 = ResumeAllDownloads(mCurrentPrivateDownloads, aResumeAll);
   NS_ENSURE_SUCCESS(rv, rv);
   NS_ENSURE_SUCCESS(rv2, rv2);
   return NS_OK;
 }
 nsresult
 nsDownloadManager::ResumeAllDownloads(nsCOMArray<nsDownload>& aDownloads, bool aResumeAll)
 {
   nsresult retVal = NS_OK;
   for (int32_t i = aDownloads.Count() - 1; i >= 0; --i) {
     nsRefPtr<nsDownload> dl = aDownloads[i];
     // If aResumeAll is true, then resume everything; otherwise, check if the
     // download should auto-resume
     if (aResumeAll || dl->ShouldAutoResume()) {
       // Reset auto-resume before retrying so that it gets into the DB through
       // ResumeRetry's eventual call to SetState. We clear the value now so we
       // don't accidentally query completed downloads that were previously
       // auto-resumed (and try to resume them).
       dl->mAutoResume = nsDownload::DONT_RESUME;
       // Try to resume/retry the download but don't bail now if we fail
       nsresult rv = ResumeRetry(dl);
       if (NS_FAILED(rv))
         retVal = rv;
     }
   }
   return retVal;
 }
 nsresult
 nsDownloadManager::RemoveAllDownloads()
 {
   nsresult rv = RemoveAllDownloads(mCurrentDownloads);
   nsresult rv2 = RemoveAllDownloads(mCurrentPrivateDownloads);
   NS_ENSURE_SUCCESS(rv, rv);
   NS_ENSURE_SUCCESS(rv2, rv2);
   return NS_OK;
 }
 nsresult
 nsDownloadManager::RemoveAllDownloads(nsCOMArray<nsDownload>& aDownloads)
 {
   nsresult rv = NS_OK;
   for (int32_t i = aDownloads.Count() - 1; i >= 0; --i) {
     nsRefPtr<nsDownload> dl = aDownloads[0];
     nsresult result = NS_OK;
     if (!dl->mPrivate && dl->IsPaused() && GetQuitBehavior() != QUIT_AND_CANCEL)
       aDownloads.RemoveObject(dl);
     else
       result = dl->Cancel();
     // Track the failure, but don't miss out on other downloads
     if (NS_FAILED(result))
       rv = result;
   }
   return rv;
 }
 nsresult
 nsDownloadManager::RemoveDownloadsForURI(mozIStorageStatement* aStatement, nsIURI *aURI)
 {
   mozStorageStatementScoper scope(aStatement);
   nsAutoCString source;
   nsresult rv = aURI->GetSpec(source);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = aStatement->BindUTF8StringByName(
     NS_LITERAL_CSTRING("source"), source);
   NS_ENSURE_SUCCESS(rv, rv);
   bool hasMore = false;
   nsAutoTArray<nsCString, 4> downloads;
   // Get all the downloads that match the provided URI
   while (NS_SUCCEEDED(aStatement->ExecuteStep(&hasMore)) &&
          hasMore) {
     nsAutoCString downloadGuid;
     rv = aStatement->GetUTF8String(0, downloadGuid);
     NS_ENSURE_SUCCESS(rv, rv);
     downloads.AppendElement(downloadGuid);
   }
   // Remove each download ignoring any failure so we reach other downloads
   for (int32_t i = downloads.Length(); --i >= 0; )
     (void)RemoveDownload(downloads[i]);
   return NS_OK;
 }
 void // static
 nsDownloadManager::ResumeOnWakeCallback(nsITimer *aTimer, void *aClosure)
 {
   // Resume the downloads that were set to autoResume
   nsDownloadManager *dlMgr = static_cast<nsDownloadManager *>(aClosure);
   (void)dlMgr->ResumeAllDownloads(false);
 }
 already_AddRefed<mozIStorageConnection>
 nsDownloadManager::GetFileDBConnection(nsIFile *dbFile) const
 {
   NS_ASSERTION(dbFile, "GetFileDBConnection called with an invalid nsIFile");
   nsCOMPtr<mozIStorageService> storage =
     do_GetService(MOZ_STORAGE_SERVICE_CONTRACTID);
   NS_ENSURE_TRUE(storage, nullptr);
   nsCOMPtr<mozIStorageConnection> conn;
   nsresult rv = storage->OpenDatabase(dbFile, getter_AddRefs(conn));
   if (rv == NS_ERROR_FILE_CORRUPTED) {
     // delete and try again, since we don't care so much about losing a user's
     // download history
     rv = dbFile->Remove(false);
     NS_ENSURE_SUCCESS(rv, nullptr);
     rv = storage->OpenDatabase(dbFile, getter_AddRefs(conn));
   }
   NS_ENSURE_SUCCESS(rv, nullptr);
   return conn.forget();
 }
 already_AddRefed<mozIStorageConnection>
 nsDownloadManager::GetPrivateDBConnection() const
 {
   nsCOMPtr<mozIStorageService> storage =
     do_GetService(MOZ_STORAGE_SERVICE_CONTRACTID);
   NS_ENSURE_TRUE(storage, nullptr);
   nsCOMPtr<mozIStorageConnection> conn;
   nsresult rv = storage->OpenSpecialDatabase("memory", getter_AddRefs(conn));
   NS_ENSURE_SUCCESS(rv, nullptr);
   return conn.forget();
 }
 void
 nsDownloadManager::CloseAllDBs()
 {
   CloseDB(mDBConn, mUpdateDownloadStatement, mGetIdsForURIStatement);
   CloseDB(mPrivateDBConn, mUpdatePrivateDownloadStatement, mGetPrivateIdsForURIStatement);
 }
 void
 nsDownloadManager::CloseDB(mozIStorageConnection* aDBConn,
                            mozIStorageStatement* aUpdateStmt,
                            mozIStorageStatement* aGetIdsStmt)
 {
   DebugOnly<nsresult> rv = aGetIdsStmt->Finalize();
   MOZ_ASSERT(NS_SUCCEEDED(rv));
   rv = aUpdateStmt->Finalize();
   MOZ_ASSERT(NS_SUCCEEDED(rv));
   rv = aDBConn->AsyncClose(nullptr);
   MOZ_ASSERT(NS_SUCCEEDED(rv));
 }
 static nsresult
 InitSQLFunctions(mozIStorageConnection* aDBConn)
 {
   nsresult rv = mozilla::downloads::GenerateGUIDFunction::create(aDBConn);
   NS_ENSURE_SUCCESS(rv, rv);
   return NS_OK;
 }
 nsresult
 nsDownloadManager::InitPrivateDB()
 {
   bool ready = false;
   if (mPrivateDBConn && NS_SUCCEEDED(mPrivateDBConn->GetConnectionReady(&ready)) && ready)
     CloseDB(mPrivateDBConn, mUpdatePrivateDownloadStatement, mGetPrivateIdsForURIStatement);
   mPrivateDBConn = GetPrivateDBConnection();
   if (!mPrivateDBConn)
     return NS_ERROR_NOT_AVAILABLE;
   nsresult rv = InitSQLFunctions(mPrivateDBConn);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = CreateTable(mPrivateDBConn);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = InitStatements(mPrivateDBConn, getter_AddRefs(mUpdatePrivateDownloadStatement),
                       getter_AddRefs(mGetPrivateIdsForURIStatement));
   NS_ENSURE_SUCCESS(rv, rv);
   return NS_OK;
 }
 nsresult
 nsDownloadManager::InitFileDB()
 {
   nsresult rv;
   nsCOMPtr<nsIFile> dbFile;
   rv = NS_GetSpecialDirectory(NS_APP_USER_PROFILE_50_DIR,
                               getter_AddRefs(dbFile));
   NS_ENSURE_SUCCESS(rv, rv);
   rv = dbFile->Append(DM_DB_NAME);
   NS_ENSURE_SUCCESS(rv, rv);
   bool ready = false;
   if (mDBConn && NS_SUCCEEDED(mDBConn->GetConnectionReady(&ready)) && ready)
     CloseDB(mDBConn, mUpdateDownloadStatement, mGetIdsForURIStatement);
   mDBConn = GetFileDBConnection(dbFile);
   NS_ENSURE_TRUE(mDBConn, NS_ERROR_NOT_AVAILABLE);
   rv = InitSQLFunctions(mDBConn);
   NS_ENSURE_SUCCESS(rv, rv);
   bool tableExists;
   rv = mDBConn->TableExists(NS_LITERAL_CSTRING("moz_downloads"), &tableExists);
   NS_ENSURE_SUCCESS(rv, rv);
   if (!tableExists) {
     rv = CreateTable(mDBConn);
     NS_ENSURE_SUCCESS(rv, rv);
     // We're done with the initialization now and can skip the remaining
     // upgrading logic.
     return NS_OK;
   }
   // Checking the database schema now
   int32_t schemaVersion;
   rv = mDBConn->GetSchemaVersion(&schemaVersion);
   NS_ENSURE_SUCCESS(rv, rv);
   // Changing the database?  Be sure to do these two things!
   // 1) Increment DM_SCHEMA_VERSION
   // 2) Implement the proper downgrade/upgrade code for the current version
   switch (schemaVersion) {
   // Upgrading
   // Every time you increment the database schema, you need to implement
   // the upgrading code from the previous version to the new one.
   // Also, don't forget to make a unit test to test your upgrading code!
   case 1: // Drop a column (iconURL) from the database (bug 385875)
     {
       // Safely wrap this in a transaction so we don't hose the whole DB
       mozStorageTransaction safeTransaction(mDBConn, true);
       // Create a temporary table that will store the existing records
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "CREATE TEMPORARY TABLE moz_downloads_backup ("
           "id INTEGER PRIMARY KEY, "
           "name TEXT, "
           "source TEXT, "
           "target TEXT, "
           "startTime INTEGER, "
           "endTime INTEGER, "
           "state INTEGER"
         ")"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Insert into a temporary table
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "INSERT INTO moz_downloads_backup "
         "SELECT id, name, source, target, startTime, endTime, state "
         "FROM moz_downloads"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Drop the old table
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "DROP TABLE moz_downloads"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Now recreate it with this schema version
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "CREATE TABLE moz_downloads ("
           "id INTEGER PRIMARY KEY, "
           "name TEXT, "
           "source TEXT, "
           "target TEXT, "
           "startTime INTEGER, "
           "endTime INTEGER, "
           "state INTEGER"
         ")"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Insert the data back into it
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "INSERT INTO moz_downloads "
         "SELECT id, name, source, target, startTime, endTime, state "
         "FROM moz_downloads_backup"));
       NS_ENSURE_SUCCESS(rv, rv);
       // And drop our temporary table
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "DROP TABLE moz_downloads_backup"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Finally, update the schemaVersion variable and the database schema
       schemaVersion = 2;
       rv = mDBConn->SetSchemaVersion(schemaVersion);
       NS_ENSURE_SUCCESS(rv, rv);
     }
     // Fallthrough to the next upgrade
   case 2: // Add referrer column to the database
     {
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "ALTER TABLE moz_downloads "
         "ADD COLUMN referrer TEXT"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Finally, update the schemaVersion variable and the database schema
       schemaVersion = 3;
       rv = mDBConn->SetSchemaVersion(schemaVersion);
       NS_ENSURE_SUCCESS(rv, rv);
     }
     // Fallthrough to the next upgrade
   case 3: // This version adds a column to the database (entityID)
     {
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "ALTER TABLE moz_downloads "
         "ADD COLUMN entityID TEXT"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Finally, update the schemaVersion variable and the database schema
       schemaVersion = 4;
       rv = mDBConn->SetSchemaVersion(schemaVersion);
       NS_ENSURE_SUCCESS(rv, rv);
     }
     // Fallthrough to the next upgrade
   case 4: // This version adds a column to the database (tempPath)
     {
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "ALTER TABLE moz_downloads "
         "ADD COLUMN tempPath TEXT"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Finally, update the schemaVersion variable and the database schema
       schemaVersion = 5;
       rv = mDBConn->SetSchemaVersion(schemaVersion);
       NS_ENSURE_SUCCESS(rv, rv);
     }
     // Fallthrough to the next upgrade
   case 5: // This version adds two columns for tracking transfer progress
     {
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "ALTER TABLE moz_downloads "
         "ADD COLUMN currBytes INTEGER NOT NULL DEFAULT 0"));
       NS_ENSURE_SUCCESS(rv, rv);
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "ALTER TABLE moz_downloads "
         "ADD COLUMN maxBytes INTEGER NOT NULL DEFAULT -1"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Finally, update the schemaVersion variable and the database schema
       schemaVersion = 6;
       rv = mDBConn->SetSchemaVersion(schemaVersion);
       NS_ENSURE_SUCCESS(rv, rv);
     }
     // Fallthrough to the next upgrade
   case 6: // This version adds three columns to DB (MIME type related info)
     {
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "ALTER TABLE moz_downloads "
         "ADD COLUMN mimeType TEXT"));
       NS_ENSURE_SUCCESS(rv, rv);
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "ALTER TABLE moz_downloads "
         "ADD COLUMN preferredApplication TEXT"));
       NS_ENSURE_SUCCESS(rv, rv);
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "ALTER TABLE moz_downloads "
         "ADD COLUMN preferredAction INTEGER NOT NULL DEFAULT 0"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Finally, update the schemaVersion variable and the database schema
       schemaVersion = 7;
       rv = mDBConn->SetSchemaVersion(schemaVersion);
       NS_ENSURE_SUCCESS(rv, rv);
     }
     // Fallthrough to next upgrade
   case 7: // This version adds a column to remember to auto-resume downloads
     {
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "ALTER TABLE moz_downloads "
         "ADD COLUMN autoResume INTEGER NOT NULL DEFAULT 0"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Finally, update the schemaVersion variable and the database schema
       schemaVersion = 8;
       rv = mDBConn->SetSchemaVersion(schemaVersion);
       NS_ENSURE_SUCCESS(rv, rv);
     }
     // Fallthrough to the next upgrade
     // Warning: schema versions >=8 must take into account that they can
     // be operating on schemas from unknown, future versions that have
     // been downgraded. Operations such as adding columns may fail,
     // since the column may already exist.
   case 8: // This version adds a column for GUIDs
     {
       bool exists;
       rv = mDBConn->IndexExists(NS_LITERAL_CSTRING("moz_downloads_guid_uniqueindex"),
                                 &exists);
       NS_ENSURE_SUCCESS(rv, rv);
       if (!exists) {
         rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
           "ALTER TABLE moz_downloads ADD COLUMN guid TEXT"));
         NS_ENSURE_SUCCESS(rv, rv);
         rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
           "CREATE UNIQUE INDEX moz_downloads_guid_uniqueindex ON moz_downloads (guid)"));
         NS_ENSURE_SUCCESS(rv, rv);
       }
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "UPDATE moz_downloads SET guid = GENERATE_GUID() WHERE guid ISNULL"));
       NS_ENSURE_SUCCESS(rv, rv);
       // Finally, update the database schema
       schemaVersion = 9;
       rv = mDBConn->SetSchemaVersion(schemaVersion);
       NS_ENSURE_SUCCESS(rv, rv);
     }
     // Fallthrough to the next upgrade
   // Extra sanity checking for developers
 #ifndef DEBUG
   case DM_SCHEMA_VERSION:
 #endif
     break;
   case 0:
     {
       NS_WARNING("Could not get download database's schema version!");
       // The table may still be usable - someone may have just messed with the
       // schema version, so let's just treat this like a downgrade and verify
       // that the needed columns are there.  If they aren't there, we'll drop
       // the table anyway.
       rv = mDBConn->SetSchemaVersion(DM_SCHEMA_VERSION);
       NS_ENSURE_SUCCESS(rv, rv);
     }
     // Fallthrough to downgrade check
   // Downgrading
   // If columns have been added to the table, we can still use the ones we
   // understand safely.  If columns have been deleted or alterd, we just
   // drop the table and start from scratch.  If you change how a column
   // should be interpreted, make sure you also change its name so this
   // check will catch it.
   default:
     {
       nsCOMPtr<mozIStorageStatement> stmt;
       rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
         "SELECT id, name, source, target, tempPath, startTime, endTime, state, "
                "referrer, entityID, currBytes, maxBytes, mimeType, "
                "preferredApplication, preferredAction, autoResume, guid "
         "FROM moz_downloads"), getter_AddRefs(stmt));
       if (NS_SUCCEEDED(rv)) {
         // We have a database that contains all of the elements that make up
         // the latest known schema. Reset the version to force an upgrade
         // path if this downgraded database is used in a later version.
         mDBConn->SetSchemaVersion(DM_SCHEMA_VERSION);
         break;
       }
       // if the statement fails, that means all the columns were not there.
       // First we backup the database
       nsCOMPtr<mozIStorageService> storage =
         do_GetService(MOZ_STORAGE_SERVICE_CONTRACTID);
       NS_ENSURE_TRUE(storage, NS_ERROR_NOT_AVAILABLE);
       nsCOMPtr<nsIFile> backup;
       rv = storage->BackupDatabaseFile(dbFile, DM_DB_CORRUPT_FILENAME, nullptr,
                                        getter_AddRefs(backup));
       NS_ENSURE_SUCCESS(rv, rv);
       // Then we dump it
       rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
         "DROP TABLE moz_downloads"));
       NS_ENSURE_SUCCESS(rv, rv);
       rv = CreateTable(mDBConn);
       NS_ENSURE_SUCCESS(rv, rv);
     }
     break;
   }
   return NS_OK;
 }
 nsresult
 nsDownloadManager::CreateTable(mozIStorageConnection* aDBConn)
 {
   nsresult rv = aDBConn->SetSchemaVersion(DM_SCHEMA_VERSION);
   if (NS_FAILED(rv)) return rv;
   rv = aDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
     "CREATE TABLE moz_downloads ("
       "id INTEGER PRIMARY KEY, "
       "name TEXT, "
       "source TEXT, "
       "target TEXT, "
       "tempPath TEXT, "
       "startTime INTEGER, "
       "endTime INTEGER, "
       "state INTEGER, "
       "referrer TEXT, "
       "entityID TEXT, "
       "currBytes INTEGER NOT NULL DEFAULT 0, "
       "maxBytes INTEGER NOT NULL DEFAULT -1, "
       "mimeType TEXT, "
       "preferredApplication TEXT, "
       "preferredAction INTEGER NOT NULL DEFAULT 0, "
       "autoResume INTEGER NOT NULL DEFAULT 0, "
       "guid TEXT"
     ")"));
   if (NS_FAILED(rv)) return rv;
   rv = aDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
     "CREATE UNIQUE INDEX moz_downloads_guid_uniqueindex "
       "ON moz_downloads(guid)"));
   return rv;
 }
 nsresult
 nsDownloadManager::RestoreDatabaseState()
 {
   // Restore downloads that were in a scanning state.  We can assume that they
   // have been dealt with by the virus scanner
   nsCOMPtr<mozIStorageStatement> stmt;
   nsresult rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "UPDATE moz_downloads "
     "SET state = :state "
     "WHERE state = :state_cond"), getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("state"), nsIDownloadManager::DOWNLOAD_FINISHED);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("state_cond"), nsIDownloadManager::DOWNLOAD_SCANNING);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->Execute();
   NS_ENSURE_SUCCESS(rv, rv);
   // Convert supposedly-active downloads into downloads that should auto-resume
   rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "UPDATE moz_downloads "
     "SET autoResume = :autoResume "
     "WHERE state = :notStarted "
       "OR state = :queued "
       "OR state = :downloading"), getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("autoResume"), nsDownload::AUTO_RESUME);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("notStarted"), nsIDownloadManager::DOWNLOAD_NOTSTARTED);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("queued"), nsIDownloadManager::DOWNLOAD_QUEUED);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("downloading"), nsIDownloadManager::DOWNLOAD_DOWNLOADING);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->Execute();
   NS_ENSURE_SUCCESS(rv, rv);
   // Switch any download that is supposed to automatically resume and is in a
   // finished state to *not* automatically resume.  See Bug 409179 for details.
   rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "UPDATE moz_downloads "
     "SET autoResume = :autoResume "
     "WHERE state = :state "
       "AND autoResume = :autoResume_cond"),
     getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("autoResume"), nsDownload::DONT_RESUME);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("state"), nsIDownloadManager::DOWNLOAD_FINISHED);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("autoResume_cond"), nsDownload::AUTO_RESUME);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->Execute();
   NS_ENSURE_SUCCESS(rv, rv);
   return NS_OK;
 }
 nsresult
 nsDownloadManager::RestoreActiveDownloads()
 {
   nsCOMPtr<mozIStorageStatement> stmt;
   nsresult rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "SELECT id "
     "FROM moz_downloads "
     "WHERE (state = :state AND LENGTH(entityID) > 0) "
       "OR autoResume != :autoResume"), getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("state"), nsIDownloadManager::DOWNLOAD_PAUSED);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("autoResume"), nsDownload::DONT_RESUME);
   NS_ENSURE_SUCCESS(rv, rv);
   nsresult retVal = NS_OK;
   bool hasResults;
   while (NS_SUCCEEDED(stmt->ExecuteStep(&hasResults)) && hasResults) {
     nsRefPtr<nsDownload> dl;
     // Keep trying to add even if we fail one, but make sure to return failure.
     // Additionally, be careful to not call anything that tries to change the
     // database because we're iterating over a live statement.
     if (NS_FAILED(GetDownloadFromDB(stmt->AsInt32(0), getter_AddRefs(dl))) ||
         NS_FAILED(AddToCurrentDownloads(dl)))
       retVal = NS_ERROR_FAILURE;
   }
   // Try to resume only the downloads that should auto-resume
   rv = ResumeAllDownloads(false);
   NS_ENSURE_SUCCESS(rv, rv);
   return retVal;
 }
 int64_t
 nsDownloadManager::AddDownloadToDB(const nsAString &aName,
                                    const nsACString &aSource,
                                    const nsACString &aTarget,
                                    const nsAString &aTempPath,
                                    int64_t aStartTime,
                                    int64_t aEndTime,
                                    const nsACString &aMimeType,
                                    const nsACString &aPreferredApp,
                                    nsHandlerInfoAction aPreferredAction,
                                    bool aPrivate,
                                    nsACString& aNewGUID)
 {
   mozIStorageConnection* dbConn = aPrivate ? mPrivateDBConn : mDBConn;
   nsCOMPtr<mozIStorageStatement> stmt;
   nsresult rv = dbConn->CreateStatement(NS_LITERAL_CSTRING(
     "INSERT INTO moz_downloads "
     "(name, source, target, tempPath, startTime, endTime, state, "
      "mimeType, preferredApplication, preferredAction, guid) VALUES "
     "(:name, :source, :target, :tempPath, :startTime, :endTime, :state, "
      ":mimeType, :preferredApplication, :preferredAction, :guid)"),
     getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, 0);
   rv = stmt->BindStringByName(NS_LITERAL_CSTRING("name"), aName);
   NS_ENSURE_SUCCESS(rv, 0);
   rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("source"), aSource);
   NS_ENSURE_SUCCESS(rv, 0);
   rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("target"), aTarget);
   NS_ENSURE_SUCCESS(rv, 0);
   rv = stmt->BindStringByName(NS_LITERAL_CSTRING("tempPath"), aTempPath);
   NS_ENSURE_SUCCESS(rv, 0);
   rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("startTime"), aStartTime);
   NS_ENSURE_SUCCESS(rv, 0);
   rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("endTime"), aEndTime);
   NS_ENSURE_SUCCESS(rv, 0);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("state"), nsIDownloadManager::DOWNLOAD_NOTSTARTED);
   NS_ENSURE_SUCCESS(rv, 0);
   rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("mimeType"), aMimeType);
   NS_ENSURE_SUCCESS(rv, 0);
   rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("preferredApplication"), aPreferredApp);
   NS_ENSURE_SUCCESS(rv, 0);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("preferredAction"), aPreferredAction);
   NS_ENSURE_SUCCESS(rv, 0);
   nsAutoCString guid;
   rv = GenerateGUID(guid);
   NS_ENSURE_SUCCESS(rv, 0);
   rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("guid"), guid);
   NS_ENSURE_SUCCESS(rv, 0);
   bool hasMore;
   rv = stmt->ExecuteStep(&hasMore); // we want to keep our lock
   NS_ENSURE_SUCCESS(rv, 0);
   int64_t id = 0;
   rv = dbConn->GetLastInsertRowID(&id);
   NS_ENSURE_SUCCESS(rv, 0);
   aNewGUID = guid;
   // lock on DB from statement will be released once we return
   return id;
 }
 nsresult
 nsDownloadManager::InitDB()
 {
   nsresult rv = InitPrivateDB();
   NS_ENSURE_SUCCESS(rv, rv);
   rv = InitFileDB();
   NS_ENSURE_SUCCESS(rv, rv);
   rv = InitStatements(mDBConn, getter_AddRefs(mUpdateDownloadStatement),
                       getter_AddRefs(mGetIdsForURIStatement));
   NS_ENSURE_SUCCESS(rv, rv);
   return NS_OK;
 }
 nsresult
 nsDownloadManager::InitStatements(mozIStorageConnection* aDBConn,
                                   mozIStorageStatement** aUpdateStatement,
                                   mozIStorageStatement** aGetIdsStatement)
 {
   nsresult rv = aDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "UPDATE moz_downloads "
     "SET tempPath = :tempPath, startTime = :startTime, endTime = :endTime, "
       "state = :state, referrer = :referrer, entityID = :entityID, "
       "currBytes = :currBytes, maxBytes = :maxBytes, autoResume = :autoResume "
     "WHERE id = :id"), aUpdateStatement);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = aDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "SELECT guid "
     "FROM moz_downloads "
     "WHERE source = :source"), aGetIdsStatement);
   NS_ENSURE_SUCCESS(rv, rv);
   return NS_OK;
 }
 nsresult
 nsDownloadManager::Init()
 {
   nsresult rv;
   nsCOMPtr<nsIStringBundleService> bundleService =
     mozilla::services::GetStringBundleService();
   if (!bundleService)
     return NS_ERROR_FAILURE;
   rv = bundleService->CreateBundle(DOWNLOAD_MANAGER_BUNDLE,
                                    getter_AddRefs(mBundle));
   NS_ENSURE_SUCCESS(rv, rv);
 #if !defined(MOZ_JSDOWNLOADS)
   // When MOZ_JSDOWNLOADS is undefined, we still check the preference that can
   // be used to enable the JavaScript API during the migration process.
   mUseJSTransfer = Preferences::GetBool(PREF_BD_USEJSTRANSFER, false);
 #else
   nsAutoCString appID;
   nsCOMPtr<nsIXULAppInfo> info = do_GetService("@mozilla.org/xre/app-info;1");
   if (info) {
     rv = info->GetID(appID);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   // The webapp runtime doesn't use the new JS downloads API yet.
   // The conversion of the webapp runtime to use the JavaScript API for
   // downloads is tracked in bug 911636.
   if (appID.EqualsLiteral("webapprt@mozilla.org")) {
     mUseJSTransfer = false;
   } else {
 #if !defined(XP_WIN)
     mUseJSTransfer = true;
 #else
     // When MOZ_JSDOWNLOADS is defined on Windows, this component is disabled
     // unless we are running in Windows Metro.  The conversion of Windows Metro
     // to use the JavaScript API for downloads is tracked in bug 906042.
     mUseJSTransfer = !IsRunningInWindowsMetro();
 #endif
   }
 #endif
   if (mUseJSTransfer)
     return NS_OK;
   // Clean up any old downloads.rdf files from before Firefox 3
   {
     nsCOMPtr<nsIFile> oldDownloadsFile;
     bool fileExists;
     if (NS_SUCCEEDED(NS_GetSpecialDirectory(NS_APP_DOWNLOADS_50_FILE,
           getter_AddRefs(oldDownloadsFile))) &&
         NS_SUCCEEDED(oldDownloadsFile->Exists(&fileExists)) &&
         fileExists) {
       (void)oldDownloadsFile->Remove(false);
     }
   }
   mObserverService = mozilla::services::GetObserverService();
   if (!mObserverService)
     return NS_ERROR_FAILURE;
   rv = InitDB();
   NS_ENSURE_SUCCESS(rv, rv);
 #ifdef DOWNLOAD_SCANNER
   mScanner = new nsDownloadScanner();
   if (!mScanner)
     return NS_ERROR_OUT_OF_MEMORY;
   rv = mScanner->Init();
   if (NS_FAILED(rv)) {
     delete mScanner;
     mScanner = nullptr;
   }
 #endif
   // Do things *after* initializing various download manager properties such as
   // restoring downloads to a consistent state
   rv = RestoreDatabaseState();
   NS_ENSURE_SUCCESS(rv, rv);
   rv = RestoreActiveDownloads();
   NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "Failed to restore all active downloads");
   nsCOMPtr<nsINavHistoryService> history =
     do_GetService(NS_NAVHISTORYSERVICE_CONTRACTID);
   (void)mObserverService->NotifyObservers(
                                 static_cast<nsIDownloadManager *>(this),
                                 "download-manager-initialized",
                                 nullptr);
   // The following AddObserver calls must be the last lines in this function,
   // because otherwise, this function may fail (and thus, this object would be not
   // completely initialized), but the observerservice would still keep a reference
   // to us and notify us about shutdown, which may cause crashes.
   // failure to add an observer is not critical
   (void)mObserverService->AddObserver(this, "quit-application", true);
   (void)mObserverService->AddObserver(this, "quit-application-requested", true);
   (void)mObserverService->AddObserver(this, "offline-requested", true);
   (void)mObserverService->AddObserver(this, "sleep_notification", true);
   (void)mObserverService->AddObserver(this, "wake_notification", true);
   (void)mObserverService->AddObserver(this, "suspend_process_notification", true);
   (void)mObserverService->AddObserver(this, "resume_process_notification", true);
   (void)mObserverService->AddObserver(this, "profile-before-change", true);
   (void)mObserverService->AddObserver(this, NS_IOSERVICE_GOING_OFFLINE_TOPIC, true);
   (void)mObserverService->AddObserver(this, NS_IOSERVICE_OFFLINE_STATUS_TOPIC, true);
   (void)mObserverService->AddObserver(this, "last-pb-context-exited", true);
   (void)mObserverService->AddObserver(this, "last-pb-context-exiting", true);
   if (history)
     (void)history->AddObserver(this, true);
   return NS_OK;
 }
 int32_t
 nsDownloadManager::GetRetentionBehavior()
 {
   // We use 0 as the default, which is "remove when done"
   nsresult rv;
   nsCOMPtr<nsIPrefBranch> pref = do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
   NS_ENSURE_SUCCESS(rv, 0);
   int32_t val;
   rv = pref->GetIntPref(PREF_BDM_RETENTION, &val);
   NS_ENSURE_SUCCESS(rv, 0);
   // Allow the Downloads Panel to change the retention behavior.  We do this to
   // allow proper migration to the new feature when using the same profile on
   // multiple versions of the product (bug 697678).  Implementation note: in
   // order to allow observers to change the retention value, we have to pass an
   // object in the aSubject parameter, we cannot use aData for that.
   nsCOMPtr<nsISupportsPRInt32> retentionBehavior =
     do_CreateInstance(NS_SUPPORTS_PRINT32_CONTRACTID);
   retentionBehavior->SetData(val);
   (void)mObserverService->NotifyObservers(retentionBehavior,
                                           "download-manager-change-retention",
                                           nullptr);
   retentionBehavior->GetData(&val);
   return val;
 }
 enum nsDownloadManager::QuitBehavior
 nsDownloadManager::GetQuitBehavior()
 {
   // We use 0 as the default, which is "remember and resume the download"
   nsresult rv;
   nsCOMPtr<nsIPrefBranch> pref = do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
   NS_ENSURE_SUCCESS(rv, QUIT_AND_RESUME);
   int32_t val;
   rv = pref->GetIntPref(PREF_BDM_QUITBEHAVIOR, &val);
   NS_ENSURE_SUCCESS(rv, QUIT_AND_RESUME);
   switch (val) {
     case 1:
       return QUIT_AND_PAUSE;
     case 2:
       return QUIT_AND_CANCEL;
     default:
       return QUIT_AND_RESUME;
   }
 }
 // Using a globally-unique GUID, search all databases (both private and public).
 // A return value of NS_ERROR_NOT_AVAILABLE means no download with the given GUID
 // could be found, either private or public.
 nsresult
 nsDownloadManager::GetDownloadFromDB(const nsACString& aGUID, nsDownload **retVal)
 {
   MOZ_ASSERT(!FindDownload(aGUID),
              "If it is a current download, you should not call this method!");
   NS_NAMED_LITERAL_CSTRING(query,
     "SELECT id, state, startTime, source, target, tempPath, name, referrer, "
            "entityID, currBytes, maxBytes, mimeType, preferredAction, "
            "preferredApplication, autoResume, guid "
     "FROM moz_downloads "
     "WHERE guid = :guid");
   // First, let's query the database and see if it even exists
   nsCOMPtr<mozIStorageStatement> stmt;
   nsresult rv = mDBConn->CreateStatement(query, getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("guid"), aGUID);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = GetDownloadFromDB(mDBConn, stmt, retVal);
   // If the download cannot be found in the public database, try again
   // in the private one. Otherwise, return whatever successful result
   // or failure obtained from the public database.
   if (rv == NS_ERROR_NOT_AVAILABLE) {
     rv = mPrivateDBConn->CreateStatement(query, getter_AddRefs(stmt));
     NS_ENSURE_SUCCESS(rv, rv);
     rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("guid"), aGUID);
     NS_ENSURE_SUCCESS(rv, rv);
     rv = GetDownloadFromDB(mPrivateDBConn, stmt, retVal);
     // Only if it still cannot be found do we report the failure.
     if (rv == NS_ERROR_NOT_AVAILABLE) {
       *retVal = nullptr;
     }
   }
   return rv;
 }
 nsresult
 nsDownloadManager::GetDownloadFromDB(uint32_t aID, nsDownload **retVal)
 {
   NS_WARNING("Using integer IDs without compat mode enabled");
   MOZ_ASSERT(!FindDownload(aID),
              "If it is a current download, you should not call this method!");
   // First, let's query the database and see if it even exists
   nsCOMPtr<mozIStorageStatement> stmt;
   nsresult rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "SELECT id, state, startTime, source, target, tempPath, name, referrer, "
            "entityID, currBytes, maxBytes, mimeType, preferredAction, "
            "preferredApplication, autoResume, guid "
     "FROM moz_downloads "
     "WHERE id = :id"), getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("id"), aID);
   NS_ENSURE_SUCCESS(rv, rv);
   return GetDownloadFromDB(mDBConn, stmt, retVal);
 }
 nsresult
 nsDownloadManager::GetDownloadFromDB(mozIStorageConnection* aDBConn,
                                      mozIStorageStatement* stmt,
                                      nsDownload **retVal)
 {
   bool hasResults = false;
   nsresult rv = stmt->ExecuteStep(&hasResults);
   if (NS_FAILED(rv) || !hasResults)
     return NS_ERROR_NOT_AVAILABLE;
   // We have a download, so lets create it
   nsRefPtr<nsDownload> dl = new nsDownload();
   if (!dl)
     return NS_ERROR_OUT_OF_MEMORY;
   dl->mPrivate = aDBConn == mPrivateDBConn;
   dl->mDownloadManager = this;
   int32_t i = 0;
   // Setting all properties of the download now
   dl->mCancelable = nullptr;
   dl->mID = stmt->AsInt64(i++);
   dl->mDownloadState = stmt->AsInt32(i++);
   dl->mStartTime = stmt->AsInt64(i++);
   nsCString source;
   stmt->GetUTF8String(i++, source);
   rv = NS_NewURI(getter_AddRefs(dl->mSource), source);
   NS_ENSURE_SUCCESS(rv, rv);
   nsCString target;
   stmt->GetUTF8String(i++, target);
   rv = NS_NewURI(getter_AddRefs(dl->mTarget), target);
   NS_ENSURE_SUCCESS(rv, rv);
   nsString tempPath;
   stmt->GetString(i++, tempPath);
   if (!tempPath.IsEmpty()) {
     rv = NS_NewLocalFile(tempPath, true, getter_AddRefs(dl->mTempFile));
     NS_ENSURE_SUCCESS(rv, rv);
   }
   stmt->GetString(i++, dl->mDisplayName);
   nsCString referrer;
   rv = stmt->GetUTF8String(i++, referrer);
   if (NS_SUCCEEDED(rv) && !referrer.IsEmpty()) {
     rv = NS_NewURI(getter_AddRefs(dl->mReferrer), referrer);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   rv = stmt->GetUTF8String(i++, dl->mEntityID);
   NS_ENSURE_SUCCESS(rv, rv);
   int64_t currBytes = stmt->AsInt64(i++);
   int64_t maxBytes = stmt->AsInt64(i++);
   dl->SetProgressBytes(currBytes, maxBytes);
   // Build mMIMEInfo only if the mimeType in DB is not empty
   nsAutoCString mimeType;
   rv = stmt->GetUTF8String(i++, mimeType);
   NS_ENSURE_SUCCESS(rv, rv);
   if (!mimeType.IsEmpty()) {
     nsCOMPtr<nsIMIMEService> mimeService =
       do_GetService(NS_MIMESERVICE_CONTRACTID, &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     rv = mimeService->GetFromTypeAndExtension(mimeType, EmptyCString(),
                                               getter_AddRefs(dl->mMIMEInfo));
     NS_ENSURE_SUCCESS(rv, rv);
     nsHandlerInfoAction action = stmt->AsInt32(i++);
     rv = dl->mMIMEInfo->SetPreferredAction(action);
     NS_ENSURE_SUCCESS(rv, rv);
     nsAutoCString persistentDescriptor;
     rv = stmt->GetUTF8String(i++, persistentDescriptor);
     NS_ENSURE_SUCCESS(rv, rv);
     if (!persistentDescriptor.IsEmpty()) {
       nsCOMPtr<nsILocalHandlerApp> handler =
         do_CreateInstance(NS_LOCALHANDLERAPP_CONTRACTID, &rv);
       NS_ENSURE_SUCCESS(rv, rv);
       nsCOMPtr<nsIFile> localExecutable;
       rv = NS_NewNativeLocalFile(EmptyCString(), false,
                                  getter_AddRefs(localExecutable));
       NS_ENSURE_SUCCESS(rv, rv);
       rv = localExecutable->SetPersistentDescriptor(persistentDescriptor);
       NS_ENSURE_SUCCESS(rv, rv);
       rv = handler->SetExecutable(localExecutable);
       NS_ENSURE_SUCCESS(rv, rv);
       rv = dl->mMIMEInfo->SetPreferredApplicationHandler(handler);
       NS_ENSURE_SUCCESS(rv, rv);
     }
   } else {
     // Compensate for the i++s skipped in the true block
     i += 2;
   }
   dl->mAutoResume =
     static_cast<enum nsDownload::AutoResume>(stmt->AsInt32(i++));
   rv = stmt->GetUTF8String(i++, dl->mGUID);
   NS_ENSURE_SUCCESS(rv, rv);
   // Handle situations where we load a download from a database that has been
   // used in an older version and not gone through the upgrade path (ie. it
   // contains empty GUID entries).
   if (dl->mGUID.IsEmpty()) {
     rv = GenerateGUID(dl->mGUID);
     NS_ENSURE_SUCCESS(rv, rv);
     nsCOMPtr<mozIStorageStatement> stmt;
     rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
                                     "UPDATE moz_downloads SET guid = :guid "
                                     "WHERE id = :id"),
                                   getter_AddRefs(stmt));
     NS_ENSURE_SUCCESS(rv, rv);
     rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("guid"), dl->mGUID);
     NS_ENSURE_SUCCESS(rv, rv);
     rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("id"), dl->mID);
     NS_ENSURE_SUCCESS(rv, rv);
     rv = stmt->Execute();
     NS_ENSURE_SUCCESS(rv, rv);
   }
   // Addrefing and returning
   NS_ADDREF(*retVal = dl);
   return NS_OK;
 }
 nsresult
 nsDownloadManager::AddToCurrentDownloads(nsDownload *aDl)
 {
   nsCOMArray<nsDownload>& currentDownloads =
     aDl->mPrivate ? mCurrentPrivateDownloads : mCurrentDownloads;
   if (!currentDownloads.AppendObject(aDl))
     return NS_ERROR_OUT_OF_MEMORY;
   aDl->mDownloadManager = this;
   return NS_OK;
 }
 void
 nsDownloadManager::SendEvent(nsDownload *aDownload, const char *aTopic)
 {
   (void)mObserverService->NotifyObservers(aDownload, aTopic, nullptr);
 }
 ////////////////////////////////////////////////////////////////////////////////
 //// nsIDownloadManager
 NS_IMETHODIMP
 nsDownloadManager::GetActivePrivateDownloadCount(int32_t* aResult)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   *aResult = mCurrentPrivateDownloads.Count();
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::GetActiveDownloadCount(int32_t *aResult)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   *aResult = mCurrentDownloads.Count();
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::GetActiveDownloads(nsISimpleEnumerator **aResult)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   return NS_NewArrayEnumerator(aResult, mCurrentDownloads);
 }
 NS_IMETHODIMP
 nsDownloadManager::GetActivePrivateDownloads(nsISimpleEnumerator **aResult)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   return NS_NewArrayEnumerator(aResult, mCurrentPrivateDownloads);
 }
 /**
  * For platforms where helper apps use the downloads directory (i.e. mobile),
  * this should be kept in sync with nsExternalHelperAppService.cpp
  */
 NS_IMETHODIMP
 nsDownloadManager::GetDefaultDownloadsDirectory(nsIFile **aResult)
 {
   nsCOMPtr<nsIFile> downloadDir;
   nsresult rv;
   nsCOMPtr<nsIProperties> dirService =
      do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID, &rv);
   NS_ENSURE_SUCCESS(rv, rv);
   // OSX 10.4:
   // Desktop
   // OSX 10.5:
   // User download directory
   // Vista:
   // Downloads
   // XP/2K:
   // My Documents/Downloads
   // Linux:
   // XDG user dir spec, with a fallback to Home/Downloads
   nsXPIDLString folderName;
   mBundle->GetStringFromName(MOZ_UTF16("downloadsFolder"),
                              getter_Copies(folderName));
 #if defined (XP_MACOSX)
   rv = dirService->Get(NS_OSX_DEFAULT_DOWNLOAD_DIR,
                        NS_GET_IID(nsIFile),
                        getter_AddRefs(downloadDir));
   NS_ENSURE_SUCCESS(rv, rv);
 #elif defined(XP_WIN)
   rv = dirService->Get(NS_WIN_DEFAULT_DOWNLOAD_DIR,
                        NS_GET_IID(nsIFile),
                        getter_AddRefs(downloadDir));
   NS_ENSURE_SUCCESS(rv, rv);
   // Check the os version
   nsCOMPtr<nsIPropertyBag2> infoService =
      do_GetService(NS_SYSTEMINFO_CONTRACTID, &rv);
   NS_ENSURE_SUCCESS(rv, rv);
   int32_t version;
   NS_NAMED_LITERAL_STRING(osVersion, "version");
   rv = infoService->GetPropertyAsInt32(osVersion, &version);
   NS_ENSURE_SUCCESS(rv, rv);
   if (version < 6) { // XP/2K
     // First get "My Documents"
     rv = dirService->Get(NS_WIN_PERSONAL_DIR,
                          NS_GET_IID(nsIFile),
                          getter_AddRefs(downloadDir));
     NS_ENSURE_SUCCESS(rv, rv);
     rv = downloadDir->Append(folderName);
     NS_ENSURE_SUCCESS(rv, rv);
     // This could be the first time we are creating the downloads folder in My
     // Documents, so make sure it exists.
     bool exists;
     rv = downloadDir->Exists(&exists);
     NS_ENSURE_SUCCESS(rv, rv);
     if (!exists) {
       rv = downloadDir->Create(nsIFile::DIRECTORY_TYPE, 0755);
       NS_ENSURE_SUCCESS(rv, rv);
     }
   }
 #elif defined(XP_UNIX)
 #if defined(MOZ_WIDGET_ANDROID)
     // Android doesn't have a $HOME directory, and by default we only have
     // write access to /data/data/org.mozilla.{$APP} and /sdcard
     char* downloadDirPath = getenv("DOWNLOADS_DIRECTORY");
     if (downloadDirPath) {
       rv = NS_NewNativeLocalFile(nsDependentCString(downloadDirPath),
                                  true, getter_AddRefs(downloadDir));
       NS_ENSURE_SUCCESS(rv, rv);
     }
     else {
       rv = NS_ERROR_FAILURE;
     }
 #else
   rv = dirService->Get(NS_UNIX_DEFAULT_DOWNLOAD_DIR,
                        NS_GET_IID(nsIFile),
                        getter_AddRefs(downloadDir));
   // fallback to Home/Downloads
   if (NS_FAILED(rv)) {
     rv = dirService->Get(NS_UNIX_HOME_DIR,
                          NS_GET_IID(nsIFile),
                          getter_AddRefs(downloadDir));
     NS_ENSURE_SUCCESS(rv, rv);
     rv = downloadDir->Append(folderName);
     NS_ENSURE_SUCCESS(rv, rv);
   }
 #endif
 #else
   rv = dirService->Get(NS_OS_HOME_DIR,
                        NS_GET_IID(nsIFile),
                        getter_AddRefs(downloadDir));
   NS_ENSURE_SUCCESS(rv, rv);
   rv = downloadDir->Append(folderName);
   NS_ENSURE_SUCCESS(rv, rv);
 #endif
   downloadDir.forget(aResult);
   return NS_OK;
 }
 #define NS_BRANCH_DOWNLOAD     "browser.download."
 #define NS_PREF_FOLDERLIST     "folderList"
 #define NS_PREF_DIR            "dir"
 NS_IMETHODIMP
 nsDownloadManager::GetUserDownloadsDirectory(nsIFile **aResult)
 {
   nsresult rv;
   nsCOMPtr<nsIProperties> dirService =
      do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID, &rv);
   NS_ENSURE_SUCCESS(rv, rv);
   nsCOMPtr<nsIPrefService> prefService =
      do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
   NS_ENSURE_SUCCESS(rv, rv);
   nsCOMPtr<nsIPrefBranch> prefBranch;
   rv = prefService->GetBranch(NS_BRANCH_DOWNLOAD,
                               getter_AddRefs(prefBranch));
   NS_ENSURE_SUCCESS(rv, rv);
   int32_t val;
   rv = prefBranch->GetIntPref(NS_PREF_FOLDERLIST,
                               &val);
   NS_ENSURE_SUCCESS(rv, rv);
   switch(val) {
     case 0: // Desktop
       {
         nsCOMPtr<nsIFile> downloadDir;
         nsCOMPtr<nsIProperties> dirService =
            do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID, &rv);
         NS_ENSURE_SUCCESS(rv, rv);
         rv = dirService->Get(NS_OS_DESKTOP_DIR,
                              NS_GET_IID(nsIFile),
                              getter_AddRefs(downloadDir));
         NS_ENSURE_SUCCESS(rv, rv);
         downloadDir.forget(aResult);
         return NS_OK;
       }
       break;
     case 1: // Downloads
       return GetDefaultDownloadsDirectory(aResult);
     case 2: // Custom
       {
         nsCOMPtr<nsIFile> customDirectory;
         prefBranch->GetComplexValue(NS_PREF_DIR,
                                     NS_GET_IID(nsIFile),
                                     getter_AddRefs(customDirectory));
         if (customDirectory) {
           bool exists = false;
           (void)customDirectory->Exists(&exists);
           if (!exists) {
             rv = customDirectory->Create(nsIFile::DIRECTORY_TYPE, 0755);
             if (NS_SUCCEEDED(rv)) {
               customDirectory.forget(aResult);
               return NS_OK;
             }
             // Create failed, so it still doesn't exist.  Fall out and get the
             // default downloads directory.
           }
           bool writable = false;
           bool directory = false;
           (void)customDirectory->IsWritable(&writable);
           (void)customDirectory->IsDirectory(&directory);
           if (exists && writable && directory) {
             customDirectory.forget(aResult);
             return NS_OK;
           }
         }
         rv = GetDefaultDownloadsDirectory(aResult);
         if (NS_SUCCEEDED(rv)) {
           (void)prefBranch->SetComplexValue(NS_PREF_DIR,
                                             NS_GET_IID(nsIFile),
                                             *aResult);
         }
         return rv;
       }
       break;
   }
   return NS_ERROR_INVALID_ARG;
 }
 NS_IMETHODIMP
 nsDownloadManager::AddDownload(DownloadType aDownloadType,
                                nsIURI *aSource,
                                nsIURI *aTarget,
                                const nsAString& aDisplayName,
                                nsIMIMEInfo *aMIMEInfo,
                                PRTime aStartTime,
                                nsIFile *aTempFile,
                                nsICancelable *aCancelable,
                                bool aIsPrivate,
                                nsIDownload **aDownload)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   NS_ENSURE_ARG_POINTER(aSource);
   NS_ENSURE_ARG_POINTER(aTarget);
   NS_ENSURE_ARG_POINTER(aDownload);
   nsresult rv;
   // target must be on the local filesystem
   nsCOMPtr<nsIFileURL> targetFileURL = do_QueryInterface(aTarget, &rv);
   NS_ENSURE_SUCCESS(rv, rv);
   nsCOMPtr<nsIFile> targetFile;
   rv = targetFileURL->GetFile(getter_AddRefs(targetFile));
   NS_ENSURE_SUCCESS(rv, rv);
   nsRefPtr<nsDownload> dl = new nsDownload();
   if (!dl)
     return NS_ERROR_OUT_OF_MEMORY;
   // give our new nsIDownload some info so it's ready to go off into the world
   dl->mTarget = aTarget;
   dl->mSource = aSource;
   dl->mTempFile = aTempFile;
   dl->mPrivate = aIsPrivate;
   dl->mDisplayName = aDisplayName;
   if (dl->mDisplayName.IsEmpty())
     targetFile->GetLeafName(dl->mDisplayName);
   dl->mMIMEInfo = aMIMEInfo;
   dl->SetStartTime(aStartTime == 0 ? PR_Now() : aStartTime);
   // Creates a cycle that will be broken when the download finishes
   dl->mCancelable = aCancelable;
   // Adding to the DB
   nsAutoCString source, target;
   aSource->GetSpec(source);
   aTarget->GetSpec(target);
   // Track the temp file for exthandler downloads
   nsAutoString tempPath;
   if (aTempFile)
     aTempFile->GetPath(tempPath);
   // Break down MIMEInfo but don't panic if we can't get all the pieces - we
   // can still download the file
   nsAutoCString persistentDescriptor, mimeType;
   nsHandlerInfoAction action = nsIMIMEInfo::saveToDisk;
   if (aMIMEInfo) {
     (void)aMIMEInfo->GetType(mimeType);
     nsCOMPtr<nsIHandlerApp> handlerApp;
     (void)aMIMEInfo->GetPreferredApplicationHandler(getter_AddRefs(handlerApp));
     nsCOMPtr<nsILocalHandlerApp> locHandlerApp = do_QueryInterface(handlerApp);
     if (locHandlerApp) {
       nsCOMPtr<nsIFile> executable;
       (void)locHandlerApp->GetExecutable(getter_AddRefs(executable));
       (void)executable->GetPersistentDescriptor(persistentDescriptor);
     }
     (void)aMIMEInfo->GetPreferredAction(&action);
   }
   int64_t id = AddDownloadToDB(dl->mDisplayName, source, target, tempPath,
                                dl->mStartTime, dl->mLastUpdate,
                                mimeType, persistentDescriptor, action,
                                dl->mPrivate, dl->mGUID /* outparam */);
   NS_ENSURE_TRUE(id, NS_ERROR_FAILURE);
   dl->mID = id;
   rv = AddToCurrentDownloads(dl);
   (void)dl->SetState(nsIDownloadManager::DOWNLOAD_QUEUED);
   NS_ENSURE_SUCCESS(rv, rv);
 #ifdef DOWNLOAD_SCANNER
   if (mScanner) {
     bool scan = true;
     nsCOMPtr<nsIPrefBranch> prefs(do_GetService(NS_PREFSERVICE_CONTRACTID));
     if (prefs) {
       (void)prefs->GetBoolPref(PREF_BDM_SCANWHENDONE, &scan);
     }
     // We currently apply local security policy to downloads when we scan
     // via windows all-in-one download security api. The CheckPolicy call
     // below is a pre-emptive part of that process. So tie applying security
     // zone policy settings when downloads are intiated to the same pref
     // that triggers applying security zone policy settings after a download
     // completes. (bug 504804)
     if (scan) {
       AVCheckPolicyState res = mScanner->CheckPolicy(aSource, aTarget);
       if (res == AVPOLICY_BLOCKED) {
         // This download will get deleted during a call to IAE's Save,
         // so go ahead and mark it as blocked and avoid the download.
         (void)CancelDownload(id);
         (void)dl->SetState(nsIDownloadManager::DOWNLOAD_BLOCKED_POLICY);
       }
     }
   }
 #endif
   // Check with parental controls to see if file downloads
   // are allowed for this user. If not allowed, cancel the
   // download and mark its state as being blocked.
   nsCOMPtr<nsIParentalControlsService> pc =
     do_CreateInstance(NS_PARENTALCONTROLSSERVICE_CONTRACTID);
   if (pc) {
     bool enabled = false;
     (void)pc->GetBlockFileDownloadsEnabled(&enabled);
     if (enabled) {
       (void)CancelDownload(id);
       (void)dl->SetState(nsIDownloadManager::DOWNLOAD_BLOCKED_PARENTAL);
     }
     // Log the event if required by pc settings.
     bool logEnabled = false;
     (void)pc->GetLoggingEnabled(&logEnabled);
     if (logEnabled) {
       (void)pc->Log(nsIParentalControlsService::ePCLog_FileDownload,
                     enabled,
                     aSource,
                     nullptr);
     }
   }
   NS_ADDREF(*aDownload = dl);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::GetDownload(uint32_t aID, nsIDownload **aDownloadItem)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   NS_WARNING("Using integer IDs without compat mode enabled");
   nsDownload *itm = FindDownload(aID);
   nsRefPtr<nsDownload> dl;
   if (!itm) {
     nsresult rv = GetDownloadFromDB(aID, getter_AddRefs(dl));
     NS_ENSURE_SUCCESS(rv, rv);
     itm = dl.get();
   }
   NS_ADDREF(*aDownloadItem = itm);
   return NS_OK;
 }
 namespace {
 class AsyncResult : public nsRunnable
 {
 public:
   AsyncResult(nsresult aStatus, nsIDownload* aResult,
               nsIDownloadManagerResult* aCallback)
   : mStatus(aStatus), mResult(aResult), mCallback(aCallback)
   {
   }
   NS_IMETHOD Run()
   {
     mCallback->HandleResult(mStatus, mResult);
     return NS_OK;
   }
 private:
   nsresult mStatus;
   nsCOMPtr<nsIDownload> mResult;
   nsCOMPtr<nsIDownloadManagerResult> mCallback;
 };
 } // anonymous namespace
 NS_IMETHODIMP
 nsDownloadManager::GetDownloadByGUID(const nsACString& aGUID,
                                      nsIDownloadManagerResult* aCallback)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   nsDownload *itm = FindDownload(aGUID);
   nsresult rv = NS_OK;
   nsRefPtr<nsDownload> dl;
   if (!itm) {
     rv = GetDownloadFromDB(aGUID, getter_AddRefs(dl));
     itm = dl.get();
   }
   nsRefPtr<AsyncResult> runnable = new AsyncResult(rv, itm, aCallback);
   NS_DispatchToMainThread(runnable);
   return NS_OK;
 }
 nsDownload *
 nsDownloadManager::FindDownload(uint32_t aID)
 {
   // we shouldn't ever have many downloads, so we can loop over them
   for (int32_t i = mCurrentDownloads.Count() - 1; i >= 0; --i) {
     nsDownload *dl = mCurrentDownloads[i];
     if (dl->mID == aID)
       return dl;
   }
   return nullptr;
 }
 nsDownload *
 nsDownloadManager::FindDownload(const nsACString& aGUID)
 {
   // we shouldn't ever have many downloads, so we can loop over them
   for (int32_t i = mCurrentDownloads.Count() - 1; i >= 0; --i) {
     nsDownload *dl = mCurrentDownloads[i];
     if (dl->mGUID == aGUID)
       return dl;
   }
   for (int32_t i = mCurrentPrivateDownloads.Count() - 1; i >= 0; --i) {
     nsDownload *dl = mCurrentPrivateDownloads[i];
     if (dl->mGUID == aGUID)
       return dl;
   }
   return nullptr;
 }
 NS_IMETHODIMP
 nsDownloadManager::CancelDownload(uint32_t aID)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   NS_WARNING("Using integer IDs without compat mode enabled");
   // We AddRef here so we don't lose access to member variables when we remove
   nsRefPtr<nsDownload> dl = FindDownload(aID);
   // if it's null, someone passed us a bad id.
   if (!dl)
     return NS_ERROR_FAILURE;
   return dl->Cancel();
 }
 nsresult
 nsDownloadManager::RetryDownload(const nsACString& aGUID)
 {
   nsRefPtr<nsDownload> dl;
   nsresult rv = GetDownloadFromDB(aGUID, getter_AddRefs(dl));
   NS_ENSURE_SUCCESS(rv, rv);
   return RetryDownload(dl);
 }
 NS_IMETHODIMP
 nsDownloadManager::RetryDownload(uint32_t aID)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   NS_WARNING("Using integer IDs without compat mode enabled");
   nsRefPtr<nsDownload> dl;
   nsresult rv = GetDownloadFromDB(aID, getter_AddRefs(dl));
   NS_ENSURE_SUCCESS(rv, rv);
   return RetryDownload(dl);
 }
 nsresult
 nsDownloadManager::RetryDownload(nsDownload* dl)
 {
   // if our download is not canceled or failed, we should fail
   if (dl->mDownloadState != nsIDownloadManager::DOWNLOAD_FAILED &&
       dl->mDownloadState != nsIDownloadManager::DOWNLOAD_BLOCKED_PARENTAL &&
       dl->mDownloadState != nsIDownloadManager::DOWNLOAD_BLOCKED_POLICY &&
       dl->mDownloadState != nsIDownloadManager::DOWNLOAD_DIRTY &&
       dl->mDownloadState != nsIDownloadManager::DOWNLOAD_CANCELED)
     return NS_ERROR_FAILURE;
   // If the download has failed and is resumable then we first try resuming it
   nsresult rv;
   if (dl->mDownloadState == nsIDownloadManager::DOWNLOAD_FAILED && dl->IsResumable()) {
     rv = dl->Resume();
     if (NS_SUCCEEDED(rv))
       return rv;
   }
   // reset time and download progress
   dl->SetStartTime(PR_Now());
   dl->SetProgressBytes(0, -1);
   nsCOMPtr<nsIWebBrowserPersist> wbp =
     do_CreateInstance("@mozilla.org/embedding/browser/nsWebBrowserPersist;1", &rv);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = wbp->SetPersistFlags(nsIWebBrowserPersist::PERSIST_FLAGS_REPLACE_EXISTING_FILES |
                             nsIWebBrowserPersist::PERSIST_FLAGS_AUTODETECT_APPLY_CONVERSION);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = AddToCurrentDownloads(dl);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = dl->SetState(nsIDownloadManager::DOWNLOAD_QUEUED);
   NS_ENSURE_SUCCESS(rv, rv);
   // Creates a cycle that will be broken when the download finishes
   dl->mCancelable = wbp;
   (void)wbp->SetProgressListener(dl);
   rv = wbp->SavePrivacyAwareURI(dl->mSource, nullptr, nullptr, nullptr, nullptr,
                                 dl->mTarget, dl->mPrivate);
   if (NS_FAILED(rv)) {
     dl->mCancelable = nullptr;
     (void)wbp->SetProgressListener(nullptr);
     return rv;
   }
   return NS_OK;
 }
 static nsresult
 RemoveDownloadByGUID(const nsACString& aGUID, mozIStorageConnection* aDBConn)
 {
   nsCOMPtr<mozIStorageStatement> stmt;
   nsresult rv = aDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "DELETE FROM moz_downloads "
     "WHERE guid = :guid"), getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("guid"), aGUID);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->Execute();
   NS_ENSURE_SUCCESS(rv, rv);
   return NS_OK;
 }
 nsresult
 nsDownloadManager::RemoveDownload(const nsACString& aGUID)
 {
   nsRefPtr<nsDownload> dl = FindDownload(aGUID);
   MOZ_ASSERT(!dl, "Can't call RemoveDownload on a download in progress!");
   if (dl)
     return NS_ERROR_FAILURE;
   nsresult rv = GetDownloadFromDB(aGUID, getter_AddRefs(dl));
   NS_ENSURE_SUCCESS(rv, rv);
   if (dl->mPrivate) {
     RemoveDownloadByGUID(aGUID, mPrivateDBConn);
   } else {
     RemoveDownloadByGUID(aGUID, mDBConn);
   }
   return NotifyDownloadRemoval(dl);
 }
 NS_IMETHODIMP
 nsDownloadManager::RemoveDownload(uint32_t aID)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   NS_WARNING("Using integer IDs without compat mode enabled");
   nsRefPtr<nsDownload> dl = FindDownload(aID);
   MOZ_ASSERT(!dl, "Can't call RemoveDownload on a download in progress!");
   if (dl)
     return NS_ERROR_FAILURE;
   nsresult rv = GetDownloadFromDB(aID, getter_AddRefs(dl));
   NS_ENSURE_SUCCESS(rv, rv);
   nsCOMPtr<mozIStorageStatement> stmt;
   rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "DELETE FROM moz_downloads "
     "WHERE id = :id"), getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("id"), aID); // unsigned; 64-bit to prevent overflow
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->Execute();
   NS_ENSURE_SUCCESS(rv, rv);
   // Notify the UI with the topic and download id
   return NotifyDownloadRemoval(dl);
 }
 nsresult
 nsDownloadManager::NotifyDownloadRemoval(nsDownload* aRemoved)
 {
   nsCOMPtr<nsISupportsPRUint32> id;
   nsCOMPtr<nsISupportsCString> guid;
   nsresult rv;
   // Only send an integer ID notification if the download is public.
   bool sendDeprecatedNotification = !(aRemoved && aRemoved->mPrivate);
   if (sendDeprecatedNotification && aRemoved) {
     id = do_CreateInstance(NS_SUPPORTS_PRUINT32_CONTRACTID, &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     uint32_t dlID;
     rv = aRemoved->GetId(&dlID);
     NS_ENSURE_SUCCESS(rv, rv);
     rv = id->SetData(dlID);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   if (sendDeprecatedNotification) {
     mObserverService->NotifyObservers(id,
                                      "download-manager-remove-download",
                                      nullptr);
   }
   if (aRemoved) {
     guid = do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID, &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     nsAutoCString guidStr;
     rv = aRemoved->GetGuid(guidStr);
     NS_ENSURE_SUCCESS(rv, rv);
     rv = guid->SetData(guidStr);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   mObserverService->NotifyObservers(guid,
                                     "download-manager-remove-download-guid",
                                     nullptr);
   return NS_OK;
 }
 static nsresult
 DoRemoveDownloadsByTimeframe(mozIStorageConnection* aDBConn,
                              int64_t aStartTime,
                              int64_t aEndTime)
 {
   nsCOMPtr<mozIStorageStatement> stmt;
   nsresult rv = aDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "DELETE FROM moz_downloads "
     "WHERE startTime >= :startTime "
     "AND startTime <= :endTime "
     "AND state NOT IN (:downloading, :paused, :queued)"), getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, rv);
   // Bind the times
   rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("startTime"), aStartTime);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("endTime"), aEndTime);
   NS_ENSURE_SUCCESS(rv, rv);
   // Bind the active states
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("downloading"), nsIDownloadManager::DOWNLOAD_DOWNLOADING);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("paused"), nsIDownloadManager::DOWNLOAD_PAUSED);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("queued"), nsIDownloadManager::DOWNLOAD_QUEUED);
   NS_ENSURE_SUCCESS(rv, rv);
   // Execute
   rv = stmt->Execute();
   NS_ENSURE_SUCCESS(rv, rv);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::RemoveDownloadsByTimeframe(int64_t aStartTime,
                                               int64_t aEndTime)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   nsresult rv = DoRemoveDownloadsByTimeframe(mDBConn, aStartTime, aEndTime);
   nsresult rv2 = DoRemoveDownloadsByTimeframe(mPrivateDBConn, aStartTime, aEndTime);
   NS_ENSURE_SUCCESS(rv, rv);
   NS_ENSURE_SUCCESS(rv2, rv2);
   // Notify the UI with the topic and null subject to indicate "remove multiple"
   return NotifyDownloadRemoval(nullptr);
 }
 NS_IMETHODIMP
 nsDownloadManager::CleanUp()
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   return CleanUp(mDBConn);
 }
 NS_IMETHODIMP
 nsDownloadManager::CleanUpPrivate()
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   return CleanUp(mPrivateDBConn);
 }
 nsresult
 nsDownloadManager::CleanUp(mozIStorageConnection* aDBConn)
 {
   DownloadState states[] = { nsIDownloadManager::DOWNLOAD_FINISHED,
                              nsIDownloadManager::DOWNLOAD_FAILED,
                              nsIDownloadManager::DOWNLOAD_CANCELED,
                              nsIDownloadManager::DOWNLOAD_BLOCKED_PARENTAL,
                              nsIDownloadManager::DOWNLOAD_BLOCKED_POLICY,
                              nsIDownloadManager::DOWNLOAD_DIRTY };
   nsCOMPtr<mozIStorageStatement> stmt;
   nsresult rv = aDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "DELETE FROM moz_downloads "
     "WHERE state = ? "
       "OR state = ? "
       "OR state = ? "
       "OR state = ? "
       "OR state = ? "
       "OR state = ?"), getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, rv);
   for (uint32_t i = 0; i < ArrayLength(states); ++i) {
     rv = stmt->BindInt32ByIndex(i, states[i]);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   rv = stmt->Execute();
   NS_ENSURE_SUCCESS(rv, rv);
   // Notify the UI with the topic and null subject to indicate "remove multiple"
   return NotifyDownloadRemoval(nullptr);
 }
 static nsresult
 DoGetCanCleanUp(mozIStorageConnection* aDBConn, bool *aResult)
 {
   // This method should never return anything but NS_OK for the benefit of
   // unwitting consumers.
   *aResult = false;
   DownloadState states[] = { nsIDownloadManager::DOWNLOAD_FINISHED,
                              nsIDownloadManager::DOWNLOAD_FAILED,
                              nsIDownloadManager::DOWNLOAD_CANCELED,
                              nsIDownloadManager::DOWNLOAD_BLOCKED_PARENTAL,
                              nsIDownloadManager::DOWNLOAD_BLOCKED_POLICY,
                              nsIDownloadManager::DOWNLOAD_DIRTY };
   nsCOMPtr<mozIStorageStatement> stmt;
   nsresult rv = aDBConn->CreateStatement(NS_LITERAL_CSTRING(
     "SELECT COUNT(*) "
     "FROM moz_downloads "
     "WHERE state = ? "
       "OR state = ? "
       "OR state = ? "
       "OR state = ? "
       "OR state = ? "
       "OR state = ?"), getter_AddRefs(stmt));
   NS_ENSURE_SUCCESS(rv, NS_OK);
   for (uint32_t i = 0; i < ArrayLength(states); ++i) {
     rv = stmt->BindInt32ByIndex(i, states[i]);
     NS_ENSURE_SUCCESS(rv, NS_OK);
   }
   bool moreResults; // We don't really care...
   rv = stmt->ExecuteStep(&moreResults);
   NS_ENSURE_SUCCESS(rv, NS_OK);
   int32_t count;
   rv = stmt->GetInt32(0, &count);
   NS_ENSURE_SUCCESS(rv, NS_OK);
   if (count > 0)
     *aResult = true;
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::GetCanCleanUp(bool *aResult)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   return DoGetCanCleanUp(mDBConn, aResult);
 }
 NS_IMETHODIMP
 nsDownloadManager::GetCanCleanUpPrivate(bool *aResult)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   return DoGetCanCleanUp(mPrivateDBConn, aResult);
 }
 NS_IMETHODIMP
 nsDownloadManager::PauseDownload(uint32_t aID)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   NS_WARNING("Using integer IDs without compat mode enabled");
   nsDownload *dl = FindDownload(aID);
   if (!dl)
     return NS_ERROR_FAILURE;
   return dl->Pause();
 }
 NS_IMETHODIMP
 nsDownloadManager::ResumeDownload(uint32_t aID)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   NS_WARNING("Using integer IDs without compat mode enabled");
   nsDownload *dl = FindDownload(aID);
   if (!dl)
     return NS_ERROR_FAILURE;
   return dl->Resume();
 }
 NS_IMETHODIMP
 nsDownloadManager::GetDBConnection(mozIStorageConnection **aDBConn)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   NS_ADDREF(*aDBConn = mDBConn);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::GetPrivateDBConnection(mozIStorageConnection **aDBConn)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   NS_ADDREF(*aDBConn = mPrivateDBConn);
   return NS_OK;
  }
 NS_IMETHODIMP
 nsDownloadManager::AddListener(nsIDownloadProgressListener *aListener)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   mListeners.AppendObject(aListener);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::AddPrivacyAwareListener(nsIDownloadProgressListener *aListener)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   mPrivacyAwareListeners.AppendObject(aListener);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::RemoveListener(nsIDownloadProgressListener *aListener)
 {
   NS_ENSURE_STATE(!mUseJSTransfer);
   mListeners.RemoveObject(aListener);
   mPrivacyAwareListeners.RemoveObject(aListener);
   return NS_OK;
 }
 void
 nsDownloadManager::NotifyListenersOnDownloadStateChange(int16_t aOldState,
                                                         nsDownload *aDownload)
 {
   for (int32_t i = mPrivacyAwareListeners.Count() - 1; i >= 0; --i) {
     mPrivacyAwareListeners[i]->OnDownloadStateChange(aOldState, aDownload);
   }
   // Only privacy-aware listeners should receive notifications about private
   // downloads, while non-privacy-aware listeners receive no sign they exist.
   if (aDownload->mPrivate) {
     return;
   }
   for (int32_t i = mListeners.Count() - 1; i >= 0; --i) {
     mListeners[i]->OnDownloadStateChange(aOldState, aDownload);
   }
 }
 void
 nsDownloadManager::NotifyListenersOnProgressChange(nsIWebProgress *aProgress,
                                                    nsIRequest *aRequest,
                                                    int64_t aCurSelfProgress,
                                                    int64_t aMaxSelfProgress,
                                                    int64_t aCurTotalProgress,
                                                    int64_t aMaxTotalProgress,
                                                    nsDownload *aDownload)
 {
   for (int32_t i = mPrivacyAwareListeners.Count() - 1; i >= 0; --i) {
     mPrivacyAwareListeners[i]->OnProgressChange(aProgress, aRequest, aCurSelfProgress,
                                                 aMaxSelfProgress, aCurTotalProgress,
                                                 aMaxTotalProgress, aDownload);
   }
   // Only privacy-aware listeners should receive notifications about private
   // downloads, while non-privacy-aware listeners receive no sign they exist.
   if (aDownload->mPrivate) {
     return;
   }
   for (int32_t i = mListeners.Count() - 1; i >= 0; --i) {
     mListeners[i]->OnProgressChange(aProgress, aRequest, aCurSelfProgress,
                                     aMaxSelfProgress, aCurTotalProgress,
                                     aMaxTotalProgress, aDownload);
   }
 }
 void
 nsDownloadManager::NotifyListenersOnStateChange(nsIWebProgress *aProgress,
                                                 nsIRequest *aRequest,
                                                 uint32_t aStateFlags,
                                                 nsresult aStatus,
                                                 nsDownload *aDownload)
 {
   for (int32_t i = mPrivacyAwareListeners.Count() - 1; i >= 0; --i) {
     mPrivacyAwareListeners[i]->OnStateChange(aProgress, aRequest, aStateFlags, aStatus,
                                              aDownload);
   }
   // Only privacy-aware listeners should receive notifications about private
   // downloads, while non-privacy-aware listeners receive no sign they exist.
   if (aDownload->mPrivate) {
     return;
   }
   for (int32_t i = mListeners.Count() - 1; i >= 0; --i) {
     mListeners[i]->OnStateChange(aProgress, aRequest, aStateFlags, aStatus,
                                  aDownload);
   }
 }
 ////////////////////////////////////////////////////////////////////////////////
 //// nsINavHistoryObserver
 NS_IMETHODIMP
 nsDownloadManager::OnBeginUpdateBatch()
 {
   // This method in not normally invoked when mUseJSTransfer is enabled, however
   // we provide an extra check in case it is called manually by add-ons.
   NS_ENSURE_STATE(!mUseJSTransfer);
   // We already have a transaction, so don't make another
   if (mHistoryTransaction)
     return NS_OK;
   // Start a transaction that commits when deleted
   mHistoryTransaction = new mozStorageTransaction(mDBConn, true);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::OnEndUpdateBatch()
 {
   // Get rid of the transaction and cause it to commit
   mHistoryTransaction = nullptr;
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::OnVisit(nsIURI *aURI, int64_t aVisitID, PRTime aTime,
                            int64_t aSessionID, int64_t aReferringID,
                            uint32_t aTransitionType, const nsACString& aGUID,
                            bool aHidden)
 {
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::OnTitleChanged(nsIURI *aURI,
                                   const nsAString &aPageTitle,
                                   const nsACString &aGUID)
 {
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::OnFrecencyChanged(nsIURI* aURI,
                                      int32_t aNewFrecency,
                                      const nsACString& aGUID,
                                      bool aHidden,
                                      PRTime aLastVisitDate)
 {
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::OnManyFrecenciesChanged()
 {
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::OnDeleteURI(nsIURI *aURI,
                                const nsACString& aGUID,
                                uint16_t aReason)
 {
   // This method in not normally invoked when mUseJSTransfer is enabled, however
   // we provide an extra check in case it is called manually by add-ons.
   NS_ENSURE_STATE(!mUseJSTransfer);
   nsresult rv = RemoveDownloadsForURI(mGetIdsForURIStatement, aURI);
   nsresult rv2 = RemoveDownloadsForURI(mGetPrivateIdsForURIStatement, aURI);
   NS_ENSURE_SUCCESS(rv, rv);
   NS_ENSURE_SUCCESS(rv2, rv2);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::OnClearHistory()
 {
   return CleanUp();
 }
 NS_IMETHODIMP
 nsDownloadManager::OnPageChanged(nsIURI *aURI,
                                  uint32_t aChangedAttribute,
                                  const nsAString& aNewValue,
                                  const nsACString &aGUID)
 {
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownloadManager::OnDeleteVisits(nsIURI *aURI, PRTime aVisitTime,
                                   const nsACString& aGUID,
                                   uint16_t aReason, uint32_t aTransitionType)
 {
   // Don't bother removing downloads until the page is removed.
   return NS_OK;
 }
 ////////////////////////////////////////////////////////////////////////////////
 //// nsIObserver
 NS_IMETHODIMP
 nsDownloadManager::Observe(nsISupports *aSubject,
                            const char *aTopic,
                            const char16_t *aData)
 {
   // This method in not normally invoked when mUseJSTransfer is enabled, however
   // we provide an extra check in case it is called manually by add-ons.
   NS_ENSURE_STATE(!mUseJSTransfer);
   // We need to count the active public downloads that could be lost
   // by quitting, and add any active private ones as well, since per-window
   // private browsing may be active.
   int32_t currDownloadCount = mCurrentDownloads.Count();
   // If we don't need to cancel all the downloads on quit, only count the ones
   // that aren't resumable.
   if (GetQuitBehavior() != QUIT_AND_CANCEL) {
     for (int32_t i = currDownloadCount - 1; i >= 0; --i) {
       if (mCurrentDownloads[i]->IsResumable()) {
         currDownloadCount--;
       }
     }
     // We have a count of the public, non-resumable downloads. Now we need
     // to add the total number of private downloads, since they are in danger
     // of being lost.
     currDownloadCount += mCurrentPrivateDownloads.Count();
   }
   nsresult rv;
   if (strcmp(aTopic, "oncancel") == 0) {
     nsCOMPtr<nsIDownload> dl = do_QueryInterface(aSubject, &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     dl->Cancel();
   } else if (strcmp(aTopic, "profile-before-change") == 0) {
     CloseAllDBs();
   } else if (strcmp(aTopic, "quit-application") == 0) {
     // Try to pause all downloads and, if appropriate, mark them as auto-resume
     // unless user has specified that downloads should be canceled
     enum QuitBehavior behavior = GetQuitBehavior();
     if (behavior != QUIT_AND_CANCEL)
       (void)PauseAllDownloads(bool(behavior != QUIT_AND_PAUSE));
     // Remove downloads to break cycles and cancel downloads
     (void)RemoveAllDownloads();
    // Now that active downloads have been canceled, remove all completed or
    // aborted downloads if the user's retention policy specifies it.
     if (GetRetentionBehavior() == 1)
       CleanUp();
   } else if (strcmp(aTopic, "quit-application-requested") == 0 &&
              currDownloadCount) {
     nsCOMPtr<nsISupportsPRBool> cancelDownloads =
       do_QueryInterface(aSubject, &rv);
     NS_ENSURE_SUCCESS(rv, rv);
 #ifndef XP_MACOSX
     ConfirmCancelDownloads(currDownloadCount, cancelDownloads,
                            MOZ_UTF16("quitCancelDownloadsAlertTitle"),
                            MOZ_UTF16("quitCancelDownloadsAlertMsgMultiple"),
                            MOZ_UTF16("quitCancelDownloadsAlertMsg"),
                            MOZ_UTF16("dontQuitButtonWin"));
 #else
     ConfirmCancelDownloads(currDownloadCount, cancelDownloads,
                            MOZ_UTF16("quitCancelDownloadsAlertTitle"),
                            MOZ_UTF16("quitCancelDownloadsAlertMsgMacMultiple"),
                            MOZ_UTF16("quitCancelDownloadsAlertMsgMac"),
                            MOZ_UTF16("dontQuitButtonMac"));
 #endif
   } else if (strcmp(aTopic, "offline-requested") == 0 && currDownloadCount) {
     nsCOMPtr<nsISupportsPRBool> cancelDownloads =
       do_QueryInterface(aSubject, &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     ConfirmCancelDownloads(currDownloadCount, cancelDownloads,
                            MOZ_UTF16("offlineCancelDownloadsAlertTitle"),
                            MOZ_UTF16("offlineCancelDownloadsAlertMsgMultiple"),
                            MOZ_UTF16("offlineCancelDownloadsAlertMsg"),
                            MOZ_UTF16("dontGoOfflineButton"));
   }
   else if (strcmp(aTopic, NS_IOSERVICE_GOING_OFFLINE_TOPIC) == 0) {
     // Pause all downloads, and mark them to auto-resume.
     (void)PauseAllDownloads(true);
   }
   else if (strcmp(aTopic, NS_IOSERVICE_OFFLINE_STATUS_TOPIC) == 0 &&
            nsDependentString(aData).EqualsLiteral(NS_IOSERVICE_ONLINE)) {
     // We can now resume all downloads that are supposed to auto-resume.
     (void)ResumeAllDownloads(false);
   }
   else if (strcmp(aTopic, "alertclickcallback") == 0) {
     nsCOMPtr<nsIDownloadManagerUI> dmui =
       do_GetService("@mozilla.org/download-manager-ui;1", &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     return dmui->Show(nullptr, nullptr, nsIDownloadManagerUI::REASON_USER_INTERACTED,
                       aData && NS_strcmp(aData, MOZ_UTF16("private")) == 0);
   } else if (strcmp(aTopic, "sleep_notification") == 0 ||
              strcmp(aTopic, "suspend_process_notification") == 0) {
     // Pause downloads if we're sleeping, and mark the downloads as auto-resume
     (void)PauseAllDownloads(true);
   } else if (strcmp(aTopic, "wake_notification") == 0 ||
              strcmp(aTopic, "resume_process_notification") == 0) {
     int32_t resumeOnWakeDelay = 10000;
     nsCOMPtr<nsIPrefBranch> pref = do_GetService(NS_PREFSERVICE_CONTRACTID);
     if (pref)
       (void)pref->GetIntPref(PREF_BDM_RESUMEONWAKEDELAY, &resumeOnWakeDelay);
     // Wait a little bit before trying to resume to avoid resuming when network
     // connections haven't restarted yet
     mResumeOnWakeTimer = do_CreateInstance("@mozilla.org/timer;1");
     if (resumeOnWakeDelay >= 0 && mResumeOnWakeTimer) {
       (void)mResumeOnWakeTimer->InitWithFuncCallback(ResumeOnWakeCallback,
         this, resumeOnWakeDelay, nsITimer::TYPE_ONE_SHOT);
     }
   } else if (strcmp(aTopic, "last-pb-context-exited") == 0) {
     // Upon leaving private browsing mode, cancel all private downloads,
     // remove all trace of them, and then blow away the private database
     // and recreate a blank one.
     RemoveAllDownloads(mCurrentPrivateDownloads);
     InitPrivateDB();
   } else if (strcmp(aTopic, "last-pb-context-exiting") == 0) {
     // If there are active private downloads, prompt the user to confirm leaving
     // private browsing mode (thereby cancelling them). Otherwise, silently proceed.
     if (!mCurrentPrivateDownloads.Count())
       return NS_OK;
     nsCOMPtr<nsISupportsPRBool> cancelDownloads = do_QueryInterface(aSubject, &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     ConfirmCancelDownloads(mCurrentPrivateDownloads.Count(), cancelDownloads,
                            MOZ_UTF16("leavePrivateBrowsingCancelDownloadsAlertTitle"),
                            MOZ_UTF16("leavePrivateBrowsingWindowsCancelDownloadsAlertMsgMultiple"),
                            MOZ_UTF16("leavePrivateBrowsingWindowsCancelDownloadsAlertMsg"),
                            MOZ_UTF16("dontLeavePrivateBrowsingButton"));
   }
   return NS_OK;
 }
 void
 nsDownloadManager::ConfirmCancelDownloads(int32_t aCount,
                                           nsISupportsPRBool *aCancelDownloads,
                                           const char16_t *aTitle,
                                           const char16_t *aCancelMessageMultiple,
                                           const char16_t *aCancelMessageSingle,
                                           const char16_t *aDontCancelButton)
 {
   // If user has already dismissed quit request, then do nothing
   bool quitRequestCancelled = false;
   aCancelDownloads->GetData(&quitRequestCancelled);
   if (quitRequestCancelled)
     return;
   nsXPIDLString title, message, quitButton, dontQuitButton;
   mBundle->GetStringFromName(aTitle, getter_Copies(title));
   nsAutoString countString;
   countString.AppendInt(aCount);
   const char16_t *strings[1] = { countString.get() };
   if (aCount > 1) {
     mBundle->FormatStringFromName(aCancelMessageMultiple, strings, 1,
                                   getter_Copies(message));
     mBundle->FormatStringFromName(MOZ_UTF16("cancelDownloadsOKTextMultiple"),
                                   strings, 1, getter_Copies(quitButton));
   } else {
     mBundle->GetStringFromName(aCancelMessageSingle, getter_Copies(message));
     mBundle->GetStringFromName(MOZ_UTF16("cancelDownloadsOKText"),
                                getter_Copies(quitButton));
   }
   mBundle->GetStringFromName(aDontCancelButton, getter_Copies(dontQuitButton));
   // Get Download Manager window, to be parent of alert.
   nsCOMPtr<nsIWindowMediator> wm = do_GetService(NS_WINDOWMEDIATOR_CONTRACTID);
   nsCOMPtr<nsIDOMWindow> dmWindow;
   if (wm) {
     wm->GetMostRecentWindow(MOZ_UTF16("Download:Manager"),
                             getter_AddRefs(dmWindow));
   }
   // Show alert.
   nsCOMPtr<nsIPromptService> prompter(do_GetService(NS_PROMPTSERVICE_CONTRACTID));
   if (prompter) {
     int32_t flags = (nsIPromptService::BUTTON_TITLE_IS_STRING * nsIPromptService::BUTTON_POS_0) + (nsIPromptService::BUTTON_TITLE_IS_STRING * nsIPromptService::BUTTON_POS_1);
     bool nothing = false;
     int32_t button;
     prompter->ConfirmEx(dmWindow, title, message, flags, quitButton.get(), dontQuitButton.get(), nullptr, nullptr, &nothing, &button);
     aCancelDownloads->SetData(button == 1);
   }
 }
 ////////////////////////////////////////////////////////////////////////////////
 //// nsDownload
 NS_IMPL_CLASSINFO(nsDownload, nullptr, 0, NS_DOWNLOAD_CID)
 NS_IMPL_ISUPPORTS_CI(
     nsDownload
   , nsIDownload
   , nsITransfer
   , nsIWebProgressListener
   , nsIWebProgressListener2
 )
 nsDownload::nsDownload() : mDownloadState(nsIDownloadManager::DOWNLOAD_NOTSTARTED),
                            mID(0),
                            mPercentComplete(0),
                            mCurrBytes(0),
                            mMaxBytes(-1),
                            mStartTime(0),
                            mLastUpdate(PR_Now() - (uint32_t)gUpdateInterval),
                            mResumedAt(-1),
                            mSpeed(0),
                            mHasMultipleFiles(false),
                            mPrivate(false),
                            mAutoResume(DONT_RESUME)
 {
 }
 nsDownload::~nsDownload()
 {
 }
 NS_IMETHODIMP nsDownload::SetSha256Hash(const nsACString& aHash) {
   MOZ_ASSERT(NS_IsMainThread(), "Must call SetSha256Hash on main thread");
   // This will be used later to query the application reputation service.
   mHash = aHash;
   return NS_OK;
 }
 NS_IMETHODIMP nsDownload::SetSignatureInfo(nsIArray* aSignatureInfo) {
   MOZ_ASSERT(NS_IsMainThread(), "Must call SetSignatureInfo on main thread");
   // This will be used later to query the application reputation service.
   mSignatureInfo = aSignatureInfo;
   return NS_OK;
 }
 #ifdef MOZ_ENABLE_GIO
 static void gio_set_metadata_done(GObject *source_obj, GAsyncResult *res, gpointer user_data)
 {
   GError *err = nullptr;
   g_file_set_attributes_finish(G_FILE(source_obj), res, nullptr, &err);
   if (err) {
 #ifdef DEBUG
     NS_DebugBreak(NS_DEBUG_WARNING, "Set file metadata failed: ", err->message, __FILE__, __LINE__);
 #endif
     g_error_free(err);
   }
 }
 #endif
 nsresult
 nsDownload::SetState(DownloadState aState)
 {
   NS_ASSERTION(mDownloadState != aState,
                "Trying to set the download state to what it already is set to!");
   int16_t oldState = mDownloadState;
   mDownloadState = aState;
   // We don't want to lose access to our member variables
   nsRefPtr<nsDownload> kungFuDeathGrip = this;
   // When the state changed listener is dispatched, queries to the database and
   // the download manager api should reflect what the nsIDownload object would
   // return. So, if a download is done (finished, canceled, etc.), it should
   // first be removed from the current downloads.  We will also have to update
   // the database *before* notifying listeners.  At this point, you can safely
   // dispatch to the observers as well.
   switch (aState) {
     case nsIDownloadManager::DOWNLOAD_BLOCKED_PARENTAL:
     case nsIDownloadManager::DOWNLOAD_BLOCKED_POLICY:
     case nsIDownloadManager::DOWNLOAD_DIRTY:
     case nsIDownloadManager::DOWNLOAD_CANCELED:
     case nsIDownloadManager::DOWNLOAD_FAILED:
 #ifdef ANDROID
       // If we still have a temp file, remove it
       bool tempExists;
       if (mTempFile && NS_SUCCEEDED(mTempFile->Exists(&tempExists)) && tempExists) {
         nsresult rv = mTempFile->Remove(false);
         NS_ENSURE_SUCCESS(rv, rv);
       }
 #endif
       // Transfers are finished, so break the reference cycle
       Finalize();
       break;
 #ifdef DOWNLOAD_SCANNER
     case nsIDownloadManager::DOWNLOAD_SCANNING:
     {
       nsresult rv = mDownloadManager->mScanner ? mDownloadManager->mScanner->ScanDownload(this) : NS_ERROR_NOT_INITIALIZED;
       // If we failed, then fall through to 'download finished'
       if (NS_SUCCEEDED(rv))
         break;
       mDownloadState = aState = nsIDownloadManager::DOWNLOAD_FINISHED;
     }
 #endif
     case nsIDownloadManager::DOWNLOAD_FINISHED:
     {
       nsresult rv = ExecuteDesiredAction();
       if (NS_FAILED(rv)) {
         // We've failed to execute the desired action.  As a result, we should
         // fail the download so the user can try again.
         (void)FailDownload(rv, nullptr);
         return rv;
       }
       // Now that we're done with handling the download, clean it up
       Finalize();
       nsCOMPtr<nsIPrefBranch> pref(do_GetService(NS_PREFSERVICE_CONTRACTID));
       // Master pref to control this function.
       bool showTaskbarAlert = true;
       if (pref)
         pref->GetBoolPref(PREF_BDM_SHOWALERTONCOMPLETE, &showTaskbarAlert);
       if (showTaskbarAlert) {
         int32_t alertInterval = 2000;
         if (pref)
           pref->GetIntPref(PREF_BDM_SHOWALERTINTERVAL, &alertInterval);
         int64_t alertIntervalUSec = alertInterval * PR_USEC_PER_MSEC;
         int64_t goat = PR_Now() - mStartTime;
         showTaskbarAlert = goat > alertIntervalUSec;
         int32_t size = mPrivate ?
             mDownloadManager->mCurrentPrivateDownloads.Count() :
             mDownloadManager->mCurrentDownloads.Count();
         if (showTaskbarAlert && size == 0) {
           nsCOMPtr<nsIAlertsService> alerts =
             do_GetService("@mozilla.org/alerts-service;1");
           if (alerts) {
               nsXPIDLString title, message;
               mDownloadManager->mBundle->GetStringFromName(
                   MOZ_UTF16("downloadsCompleteTitle"),
                   getter_Copies(title));
               mDownloadManager->mBundle->GetStringFromName(
                   MOZ_UTF16("downloadsCompleteMsg"),
                   getter_Copies(message));
               bool removeWhenDone =
                 mDownloadManager->GetRetentionBehavior() == 0;
               // If downloads are automatically removed per the user's
               // retention policy, there's no reason to make the text clickable
               // because if it is, they'll click open the download manager and
               // the items they downloaded will have been removed.
               alerts->ShowAlertNotification(
                   NS_LITERAL_STRING(DOWNLOAD_MANAGER_ALERT_ICON), title,
                   message, !removeWhenDone,
                   mPrivate ? NS_LITERAL_STRING("private") : NS_LITERAL_STRING("non-private"),
                   mDownloadManager, EmptyString(), NS_LITERAL_STRING("auto"),
                   EmptyString(), nullptr);
             }
         }
       }
 #if defined(XP_WIN) || defined(XP_MACOSX) || defined(MOZ_WIDGET_ANDROID) || defined(MOZ_WIDGET_GTK)
       nsCOMPtr<nsIFileURL> fileURL = do_QueryInterface(mTarget);
       nsCOMPtr<nsIFile> file;
       nsAutoString path;
       if (fileURL &&
           NS_SUCCEEDED(fileURL->GetFile(getter_AddRefs(file))) &&
           file &&
           NS_SUCCEEDED(file->GetPath(path))) {
 #if defined(XP_WIN) || defined(MOZ_WIDGET_GTK)
         // On Windows and Gtk, add the download to the system's "recent documents"
         // list, with a pref to disable.
         {
           bool addToRecentDocs = true;
           if (pref)
             pref->GetBoolPref(PREF_BDM_ADDTORECENTDOCS, &addToRecentDocs);
           if (addToRecentDocs && !mPrivate) {
 #ifdef XP_WIN
             ::SHAddToRecentDocs(SHARD_PATHW, path.get());
 #elif defined(MOZ_WIDGET_GTK)
             GtkRecentManager* manager = gtk_recent_manager_get_default();
             gchar* uri = g_filename_to_uri(NS_ConvertUTF16toUTF8(path).get(),
                                            nullptr, nullptr);
             if (uri) {
               gtk_recent_manager_add_item(manager, uri);
               g_free(uri);
             }
 #endif
           }
 #ifdef MOZ_ENABLE_GIO
           // Use GIO to store the source URI for later display in the file manager.
           GFile* gio_file = g_file_new_for_path(NS_ConvertUTF16toUTF8(path).get());
           nsCString source_uri;
           mSource->GetSpec(source_uri);
           GFileInfo *file_info = g_file_info_new();
           g_file_info_set_attribute_string(file_info, "metadata::download-uri", source_uri.get());
           g_file_set_attributes_async(gio_file,
                                       file_info,
                                       G_FILE_QUERY_INFO_NONE,
                                       G_PRIORITY_DEFAULT,
                                       nullptr, gio_set_metadata_done, nullptr);
           g_object_unref(file_info);
           g_object_unref(gio_file);
 #endif
         }
 #endif
 #ifdef XP_MACOSX
         // On OS X, make the downloads stack bounce.
         CFStringRef observedObject = ::CFStringCreateWithCString(kCFAllocatorDefault,
                                                  NS_ConvertUTF16toUTF8(path).get(),
                                                  kCFStringEncodingUTF8);
         CFNotificationCenterRef center = ::CFNotificationCenterGetDistributedCenter();
         ::CFNotificationCenterPostNotification(center, CFSTR("com.apple.DownloadFileFinished"),
                                                observedObject, nullptr, TRUE);
         ::CFRelease(observedObject);
 #endif
 #ifdef MOZ_WIDGET_ANDROID
         nsCOMPtr<nsIMIMEInfo> mimeInfo;
         nsAutoCString contentType;
         GetMIMEInfo(getter_AddRefs(mimeInfo));
         if (mimeInfo)
           mimeInfo->GetMIMEType(contentType);
         mozilla::widget::android::GeckoAppShell::ScanMedia(path, NS_ConvertUTF8toUTF16(contentType));
 #endif
       }
 #ifdef XP_WIN
       // Adjust file attributes so that by default, new files are indexed
       // by desktop search services. Skip off those that land in the temp
       // folder.
       nsCOMPtr<nsIFile> tempDir, fileDir;
       rv = NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(tempDir));
       NS_ENSURE_SUCCESS(rv, rv);
       (void)file->GetParent(getter_AddRefs(fileDir));
       bool isTemp = false;
       if (fileDir)
         (void)fileDir->Equals(tempDir, &isTemp);
       nsCOMPtr<nsILocalFileWin> localFileWin(do_QueryInterface(file));
       if (!isTemp && localFileWin)
         (void)localFileWin->SetFileAttributesWin(nsILocalFileWin::WFA_SEARCH_INDEXED);
 #endif
 #endif
       // Now remove the download if the user's retention policy is "Remove when Done"
       if (mDownloadManager->GetRetentionBehavior() == 0)
         mDownloadManager->RemoveDownload(mGUID);
     }
     break;
   default:
     break;
   }
   // Before notifying the listener, we must update the database so that calls
   // to it work out properly.
   nsresult rv = UpdateDB();
   NS_ENSURE_SUCCESS(rv, rv);
   mDownloadManager->NotifyListenersOnDownloadStateChange(oldState, this);
   switch (mDownloadState) {
     case nsIDownloadManager::DOWNLOAD_DOWNLOADING:
       // Only send the dl-start event to downloads that are actually starting.
       if (oldState == nsIDownloadManager::DOWNLOAD_QUEUED) {
         if (!mPrivate)
           mDownloadManager->SendEvent(this, "dl-start");
       }
       break;
     case nsIDownloadManager::DOWNLOAD_FAILED:
       if (!mPrivate)
         mDownloadManager->SendEvent(this, "dl-failed");
       break;
     case nsIDownloadManager::DOWNLOAD_SCANNING:
       if (!mPrivate)
         mDownloadManager->SendEvent(this, "dl-scanning");
       break;
     case nsIDownloadManager::DOWNLOAD_FINISHED:
       if (!mPrivate)
         mDownloadManager->SendEvent(this, "dl-done");
       break;
     case nsIDownloadManager::DOWNLOAD_BLOCKED_PARENTAL:
     case nsIDownloadManager::DOWNLOAD_BLOCKED_POLICY:
       if (!mPrivate)
         mDownloadManager->SendEvent(this, "dl-blocked");
       break;
     case nsIDownloadManager::DOWNLOAD_DIRTY:
       if (!mPrivate)
         mDownloadManager->SendEvent(this, "dl-dirty");
       break;
     case nsIDownloadManager::DOWNLOAD_CANCELED:
       if (!mPrivate)
         mDownloadManager->SendEvent(this, "dl-cancel");
       break;
     default:
       break;
   }
   return NS_OK;
 }
 ////////////////////////////////////////////////////////////////////////////////
 //// nsIWebProgressListener2
 NS_IMETHODIMP
 nsDownload::OnProgressChange64(nsIWebProgress *aWebProgress,
                                nsIRequest *aRequest,
                                int64_t aCurSelfProgress,
                                int64_t aMaxSelfProgress,
                                int64_t aCurTotalProgress,
                                int64_t aMaxTotalProgress)
 {
   if (!mRequest)
     mRequest = aRequest; // used for pause/resume
   if (mDownloadState == nsIDownloadManager::DOWNLOAD_QUEUED) {
     // Obtain the referrer
     nsresult rv;
     nsCOMPtr<nsIChannel> channel(do_QueryInterface(aRequest));
     nsCOMPtr<nsIURI> referrer = mReferrer;
     if (channel)
       (void)NS_GetReferrerFromChannel(channel, getter_AddRefs(mReferrer));
     // Restore the original referrer if the new one isn't useful
     if (!mReferrer)
       mReferrer = referrer;
     // If we have a MIME info, we know that exthandler has already added this to
     // the history, but if we do not, we'll have to add it ourselves.
     if (!mMIMEInfo && !mPrivate) {
       nsCOMPtr<nsIDownloadHistory> dh =
         do_GetService(NS_DOWNLOADHISTORY_CONTRACTID);
       if (dh)
         (void)dh->AddDownload(mSource, mReferrer, mStartTime, mTarget);
     }
     // Fetch the entityID, but if we can't get it, don't panic (non-resumable)
     nsCOMPtr<nsIResumableChannel> resumableChannel(do_QueryInterface(aRequest));
     if (resumableChannel)
       (void)resumableChannel->GetEntityID(mEntityID);
     // Before we update the state and dispatch state notifications, we want to
     // ensure that we have the correct state for this download with regards to
     // its percent completion and size.
     SetProgressBytes(0, aMaxTotalProgress);
     // Update the state and the database
     rv = SetState(nsIDownloadManager::DOWNLOAD_DOWNLOADING);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   // filter notifications since they come in so frequently
   PRTime now = PR_Now();
   PRIntervalTime delta = now - mLastUpdate;
   if (delta < gUpdateInterval)
     return NS_OK;
   mLastUpdate = now;
   // Calculate the speed using the elapsed delta time and bytes downloaded
   // during that time for more accuracy.
   double elapsedSecs = double(delta) / PR_USEC_PER_SEC;
   if (elapsedSecs > 0) {
     double speed = double(aCurTotalProgress - mCurrBytes) / elapsedSecs;
     if (mCurrBytes == 0) {
       mSpeed = speed;
     } else {
       // Calculate 'smoothed average' of 10 readings.
       mSpeed = mSpeed * 0.9 + speed * 0.1;
     }
   }
   SetProgressBytes(aCurTotalProgress, aMaxTotalProgress);
   // Report to the listener our real sizes
   int64_t currBytes, maxBytes;
   (void)GetAmountTransferred(&currBytes);
   (void)GetSize(&maxBytes);
   mDownloadManager->NotifyListenersOnProgressChange(
     aWebProgress, aRequest, currBytes, maxBytes, currBytes, maxBytes, this);
   // If the maximums are different, then there must be more than one file
   if (aMaxSelfProgress != aMaxTotalProgress)
     mHasMultipleFiles = true;
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::OnRefreshAttempted(nsIWebProgress *aWebProgress,
                                nsIURI *aUri,
                                int32_t aDelay,
                                bool aSameUri,
                                bool *allowRefresh)
 {
   *allowRefresh = true;
   return NS_OK;
 }
 ////////////////////////////////////////////////////////////////////////////////
 //// nsIWebProgressListener
 NS_IMETHODIMP
 nsDownload::OnProgressChange(nsIWebProgress *aWebProgress,
                              nsIRequest *aRequest,
                              int32_t aCurSelfProgress,
                              int32_t aMaxSelfProgress,
                              int32_t aCurTotalProgress,
                              int32_t aMaxTotalProgress)
 {
   return OnProgressChange64(aWebProgress, aRequest,
                             aCurSelfProgress, aMaxSelfProgress,
                             aCurTotalProgress, aMaxTotalProgress);
 }
 NS_IMETHODIMP
 nsDownload::OnLocationChange(nsIWebProgress *aWebProgress,
                              nsIRequest *aRequest, nsIURI *aLocation,
                              uint32_t aFlags)
 {
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::OnStatusChange(nsIWebProgress *aWebProgress,
                            nsIRequest *aRequest, nsresult aStatus,
                            const char16_t *aMessage)
 {
   if (NS_FAILED(aStatus))
     return FailDownload(aStatus, aMessage);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::OnStateChange(nsIWebProgress *aWebProgress,
                           nsIRequest *aRequest, uint32_t aStateFlags,
                           nsresult aStatus)
 {
   MOZ_ASSERT(NS_IsMainThread(), "Must call OnStateChange in main thread");
   // We don't want to lose access to our member variables
   nsRefPtr<nsDownload> kungFuDeathGrip = this;
   // Check if we're starting a request; the NETWORK flag is necessary to not
   // pick up the START of *each* file but only for the whole request
   if ((aStateFlags & STATE_START) && (aStateFlags & STATE_IS_NETWORK)) {
     nsresult rv;
     nsCOMPtr<nsIHttpChannel> channel = do_QueryInterface(aRequest, &rv);
     if (NS_SUCCEEDED(rv)) {
       uint32_t status;
       rv = channel->GetResponseStatus(&status);
       // HTTP 450 - Blocked by parental control proxies
       if (NS_SUCCEEDED(rv) && status == 450) {
         // Cancel using the provided object
         (void)Cancel();
         // Fail the download
         (void)SetState(nsIDownloadManager::DOWNLOAD_BLOCKED_PARENTAL);
       }
     }
   } else if ((aStateFlags & STATE_STOP) && (aStateFlags & STATE_IS_NETWORK) &&
              IsFinishable()) {
     // We got both STOP and NETWORK so that means the whole request is done
     // (and not just a single file if there are multiple files)
     if (NS_SUCCEEDED(aStatus)) {
       // We can't completely trust the bytes we've added up because we might be
       // missing on some/all of the progress updates (especially from cache).
       // Our best bet is the file itself, but if for some reason it's gone or
       // if we have multiple files, the next best is what we've calculated.
       int64_t fileSize;
       nsCOMPtr<nsIFile> file;
       //  We need a nsIFile clone to deal with file size caching issues. :(
       nsCOMPtr<nsIFile> clone;
       if (!mHasMultipleFiles &&
           NS_SUCCEEDED(GetTargetFile(getter_AddRefs(file))) &&
           NS_SUCCEEDED(file->Clone(getter_AddRefs(clone))) &&
           NS_SUCCEEDED(clone->GetFileSize(&fileSize)) && fileSize > 0) {
         mCurrBytes = mMaxBytes = fileSize;
         // If we resumed, keep the fact that we did and fix size calculations
         if (WasResumed())
           mResumedAt = 0;
       } else if (mMaxBytes == -1) {
         mMaxBytes = mCurrBytes;
       } else {
         mCurrBytes = mMaxBytes;
       }
       mPercentComplete = 100;
       mLastUpdate = PR_Now();
 #ifdef DOWNLOAD_SCANNER
       bool scan = true;
       nsCOMPtr<nsIPrefBranch> prefs(do_GetService(NS_PREFSERVICE_CONTRACTID));
       if (prefs)
         (void)prefs->GetBoolPref(PREF_BDM_SCANWHENDONE, &scan);
       if (scan)
         (void)SetState(nsIDownloadManager::DOWNLOAD_SCANNING);
       else
         (void)SetState(nsIDownloadManager::DOWNLOAD_FINISHED);
 #else
       (void)SetState(nsIDownloadManager::DOWNLOAD_FINISHED);
 #endif
     } else {
       // We failed for some unknown reason -- fail with a generic message
       (void)FailDownload(aStatus, nullptr);
     }
   }
   mDownloadManager->NotifyListenersOnStateChange(aWebProgress, aRequest,
                                                  aStateFlags, aStatus, this);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::OnSecurityChange(nsIWebProgress *aWebProgress,
                              nsIRequest *aRequest, uint32_t aState)
 {
   return NS_OK;
 }
 ////////////////////////////////////////////////////////////////////////////////
 //// nsIDownload
 NS_IMETHODIMP
 nsDownload::Init(nsIURI *aSource,
                  nsIURI *aTarget,
                  const nsAString& aDisplayName,
                  nsIMIMEInfo *aMIMEInfo,
                  PRTime aStartTime,
                  nsIFile *aTempFile,
                  nsICancelable *aCancelable,
                  bool aIsPrivate)
 {
   NS_WARNING("Huh...how did we get here?!");
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetState(int16_t *aState)
 {
   *aState = mDownloadState;
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetDisplayName(nsAString &aDisplayName)
 {
   aDisplayName = mDisplayName;
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetCancelable(nsICancelable **aCancelable)
 {
   *aCancelable = mCancelable;
   NS_IF_ADDREF(*aCancelable);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetTarget(nsIURI **aTarget)
 {
   *aTarget = mTarget;
   NS_IF_ADDREF(*aTarget);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetSource(nsIURI **aSource)
 {
   *aSource = mSource;
   NS_IF_ADDREF(*aSource);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetStartTime(int64_t *aStartTime)
 {
   *aStartTime = mStartTime;
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetPercentComplete(int32_t *aPercentComplete)
 {
   *aPercentComplete = mPercentComplete;
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetAmountTransferred(int64_t *aAmountTransferred)
 {
   *aAmountTransferred = mCurrBytes + (WasResumed() ? mResumedAt : 0);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetSize(int64_t *aSize)
 {
   *aSize = mMaxBytes + (WasResumed() && mMaxBytes != -1 ? mResumedAt : 0);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetMIMEInfo(nsIMIMEInfo **aMIMEInfo)
 {
   *aMIMEInfo = mMIMEInfo;
   NS_IF_ADDREF(*aMIMEInfo);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetTargetFile(nsIFile **aTargetFile)
 {
   nsresult rv;
   nsCOMPtr<nsIFileURL> fileURL = do_QueryInterface(mTarget, &rv);
   if (NS_FAILED(rv)) {
     return rv;
   }
   nsCOMPtr<nsIFile> file;
   rv = fileURL->GetFile(getter_AddRefs(file));
   if (NS_FAILED(rv)) {
     return rv;
   }
   file.forget(aTargetFile);
   return rv;
 }
 NS_IMETHODIMP
 nsDownload::GetSpeed(double *aSpeed)
 {
   *aSpeed = mSpeed;
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetId(uint32_t *aId)
 {
   if (mPrivate) {
     return NS_ERROR_NOT_AVAILABLE;
   }
   *aId = mID;
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetGuid(nsACString &aGUID)
 {
   aGUID = mGUID;
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetReferrer(nsIURI **referrer)
 {
   NS_IF_ADDREF(*referrer = mReferrer);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetResumable(bool *resumable)
 {
   *resumable = IsResumable();
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::GetIsPrivate(bool *isPrivate)
 {
   *isPrivate = mPrivate;
   return NS_OK;
 }
 ////////////////////////////////////////////////////////////////////////////////
 //// nsDownload Helper Functions
 void
 nsDownload::Finalize()
 {
   // We're stopping, so break the cycle we created at download start
   mCancelable = nullptr;
   // Reset values that aren't needed anymore, so the DB can be updated as well
   mEntityID.Truncate();
   mTempFile = nullptr;
   // Remove ourself from the active downloads
   nsCOMArray<nsDownload>& currentDownloads = mPrivate ?
     mDownloadManager->mCurrentPrivateDownloads :
     mDownloadManager->mCurrentDownloads;
   (void)currentDownloads.RemoveObject(this);
   // Make sure we do not automatically resume
   mAutoResume = DONT_RESUME;
 }
 nsresult
 nsDownload::ExecuteDesiredAction()
 {
   // nsExternalHelperAppHandler is the only caller of AddDownload that sets a
   // tempfile parameter. In this case, execute the desired action according to
   // the saved mime info.
   if (!mTempFile) {
     return NS_OK;
   }
   // We need to bail if for some reason the temp file got removed
   bool fileExists;
   if (NS_FAILED(mTempFile->Exists(&fileExists)) || !fileExists)
     return NS_ERROR_FILE_NOT_FOUND;
   // Assume an unknown action is save to disk
   nsHandlerInfoAction action = nsIMIMEInfo::saveToDisk;
   if (mMIMEInfo) {
     nsresult rv = mMIMEInfo->GetPreferredAction(&action);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   nsresult retVal = NS_OK;
   switch (action) {
     case nsIMIMEInfo::saveToDisk:
       // Move the file to the proper location
       retVal = MoveTempToTarget();
       break;
     case nsIMIMEInfo::useHelperApp:
     case nsIMIMEInfo::useSystemDefault:
       // For these cases we have to move the file to the target location and
       // open with the appropriate application
       retVal = OpenWithApplication();
       break;
     default:
       break;
   }
   return retVal;
 }
 nsresult
 nsDownload::MoveTempToTarget()
 {
   nsCOMPtr<nsIFile> target;
   nsresult rv = GetTargetFile(getter_AddRefs(target));
   NS_ENSURE_SUCCESS(rv, rv);
   // MoveTo will fail if the file already exists, but we've already obtained
   // confirmation from the user that this is OK, so remove it if it exists.
   bool fileExists;
   if (NS_SUCCEEDED(target->Exists(&fileExists)) && fileExists) {
     rv = target->Remove(false);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   // Extract the new leaf name from the file location
   nsAutoString fileName;
   rv = target->GetLeafName(fileName);
   NS_ENSURE_SUCCESS(rv, rv);
   nsCOMPtr<nsIFile> dir;
   rv = target->GetParent(getter_AddRefs(dir));
   NS_ENSURE_SUCCESS(rv, rv);
   rv = mTempFile->MoveTo(dir, fileName);
   NS_ENSURE_SUCCESS(rv, rv);
   return NS_OK;
 }
 nsresult
 nsDownload::OpenWithApplication()
 {
   // First move the temporary file to the target location
   nsCOMPtr<nsIFile> target;
   nsresult rv = GetTargetFile(getter_AddRefs(target));
   NS_ENSURE_SUCCESS(rv, rv);
   // Move the temporary file to the target location
   rv = MoveTempToTarget();
   NS_ENSURE_SUCCESS(rv, rv);
   // We do not verify the return value here because, irrespective of success
   // or failure of the method, the deletion of temp file has to take place, as
   // per the corresponding preference. But we store this separately as this is
   // what we ultimately return from this function.
   nsresult retVal = mMIMEInfo->LaunchWithFile(target);
   bool deleteTempFileOnExit;
   nsCOMPtr<nsIPrefBranch> prefs(do_GetService(NS_PREFSERVICE_CONTRACTID));
   if (!prefs || NS_FAILED(prefs->GetBoolPref(PREF_BH_DELETETEMPFILEONEXIT,
                                              &deleteTempFileOnExit))) {
     // No prefservice or no pref set; use default value
 #if !defined(XP_MACOSX)
     // Mac users have been very verbal about temp files being deleted on
     // app exit - they don't like it - but we'll continue to do this on
     // other platforms for now.
     deleteTempFileOnExit = true;
 #else
     deleteTempFileOnExit = false;
 #endif
   }
   // Always schedule files to be deleted at the end of the private browsing
   // mode, regardless of the value of the pref.
   if (deleteTempFileOnExit || mPrivate) {
     // Use the ExternalHelperAppService to push the temporary file to the list
     // of files to be deleted on exit.
     nsCOMPtr<nsPIExternalAppLauncher> appLauncher(do_GetService
                     (NS_EXTERNALHELPERAPPSERVICE_CONTRACTID));
     // Even if we are unable to get this service we return the result
     // of LaunchWithFile() which makes more sense.
     if (appLauncher) {
       if (mPrivate) {
         (void)appLauncher->DeleteTemporaryPrivateFileWhenPossible(target);
       } else {
         (void)appLauncher->DeleteTemporaryFileOnExit(target);
       }
     }
   }
   return retVal;
 }
 void
 nsDownload::SetStartTime(int64_t aStartTime)
 {
   mStartTime = aStartTime;
   mLastUpdate = aStartTime;
 }
 void
 nsDownload::SetProgressBytes(int64_t aCurrBytes, int64_t aMaxBytes)
 {
   mCurrBytes = aCurrBytes;
   mMaxBytes = aMaxBytes;
   // Get the real bytes that include resume position
   int64_t currBytes, maxBytes;
   (void)GetAmountTransferred(&currBytes);
   (void)GetSize(&maxBytes);
   if (currBytes == maxBytes)
     mPercentComplete = 100;
   else if (maxBytes <= 0)
     mPercentComplete = -1;
   else
     mPercentComplete = (int32_t)((double)currBytes / maxBytes * 100 + .5);
 }
 NS_IMETHODIMP
 nsDownload::Pause()
 {
   if (!IsResumable())
     return NS_ERROR_UNEXPECTED;
   nsresult rv = CancelTransfer();
   NS_ENSURE_SUCCESS(rv, rv);
   return SetState(nsIDownloadManager::DOWNLOAD_PAUSED);
 }
 nsresult
 nsDownload::CancelTransfer()
 {
   nsresult rv = NS_OK;
   if (mCancelable) {
     rv = mCancelable->Cancel(NS_BINDING_ABORTED);
     // we're done with this, so break the cycle
     mCancelable = nullptr;
   }
   return rv;
 }
 NS_IMETHODIMP
 nsDownload::Cancel()
 {
   // Don't cancel if download is already finished
   if (IsFinished())
     return NS_OK;
   // Have the download cancel its connection
   (void)CancelTransfer();
   // Dump the temp file because we know we don't need the file anymore. The
   // underlying transfer creating the file doesn't delete the file because it
   // can't distinguish between a pause that cancels the transfer or a real
   // cancel.
   if (mTempFile) {
     bool exists;
     mTempFile->Exists(&exists);
     if (exists)
       mTempFile->Remove(false);
   }
   nsCOMPtr<nsIFile> file;
   if (NS_SUCCEEDED(GetTargetFile(getter_AddRefs(file))))
   {
     bool exists;
     file->Exists(&exists);
     if (exists)
       file->Remove(false);
   }
   nsresult rv = SetState(nsIDownloadManager::DOWNLOAD_CANCELED);
   NS_ENSURE_SUCCESS(rv, rv);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsDownload::Resume()
 {
   if (!IsPaused() || !IsResumable())
     return NS_ERROR_UNEXPECTED;
   nsresult rv;
   nsCOMPtr<nsIWebBrowserPersist> wbp =
     do_CreateInstance("@mozilla.org/embedding/browser/nsWebBrowserPersist;1", &rv);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = wbp->SetPersistFlags(nsIWebBrowserPersist::PERSIST_FLAGS_APPEND_TO_FILE |
                             nsIWebBrowserPersist::PERSIST_FLAGS_AUTODETECT_APPLY_CONVERSION);
   NS_ENSURE_SUCCESS(rv, rv);
   // Create a new channel for the source URI
   nsCOMPtr<nsIChannel> channel;
   nsCOMPtr<nsIInterfaceRequestor> ir(do_QueryInterface(wbp));
   rv = NS_NewChannel(getter_AddRefs(channel), mSource, nullptr, nullptr, ir);
   NS_ENSURE_SUCCESS(rv, rv);
   nsCOMPtr<nsIPrivateBrowsingChannel> pbChannel = do_QueryInterface(channel);
   if (pbChannel) {
     pbChannel->SetPrivate(mPrivate);
   }
   // Make sure we can get a file, either the temporary or the real target, for
   // both purposes of file size and a target to write to
   nsCOMPtr<nsIFile> targetLocalFile(mTempFile);
   if (!targetLocalFile) {
     rv = GetTargetFile(getter_AddRefs(targetLocalFile));
     NS_ENSURE_SUCCESS(rv, rv);
   }
   // Get the file size to be used as an offset, but if anything goes wrong
   // along the way, we'll silently restart at 0.
   int64_t fileSize;
   //  We need a nsIFile clone to deal with file size caching issues. :(
   nsCOMPtr<nsIFile> clone;
   if (NS_FAILED(targetLocalFile->Clone(getter_AddRefs(clone))) ||
       NS_FAILED(clone->GetFileSize(&fileSize)))
     fileSize = 0;
   // Set the channel to resume at the right position along with the entityID
   nsCOMPtr<nsIResumableChannel> resumableChannel(do_QueryInterface(channel));
   if (!resumableChannel)
     return NS_ERROR_UNEXPECTED;
   rv = resumableChannel->ResumeAt(fileSize, mEntityID);
   NS_ENSURE_SUCCESS(rv, rv);
   // If we know the max size, we know what it should be when resuming
   int64_t maxBytes;
   GetSize(&maxBytes);
   SetProgressBytes(0, maxBytes != -1 ? maxBytes - fileSize : -1);
   // Track where we resumed because progress notifications restart at 0
   mResumedAt = fileSize;
   // Set the referrer
   if (mReferrer) {
     nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
     if (httpChannel) {
       rv = httpChannel->SetReferrer(mReferrer);
       NS_ENSURE_SUCCESS(rv, rv);
     }
   }
   // Creates a cycle that will be broken when the download finishes
   mCancelable = wbp;
   (void)wbp->SetProgressListener(this);
   // Save the channel using nsIWBP
   rv = wbp->SaveChannel(channel, targetLocalFile);
   if (NS_FAILED(rv)) {
     mCancelable = nullptr;
     (void)wbp->SetProgressListener(nullptr);
     return rv;
   }
   return SetState(nsIDownloadManager::DOWNLOAD_DOWNLOADING);
 }
 NS_IMETHODIMP
 nsDownload::Remove()
 {
   return mDownloadManager->RemoveDownload(mGUID);
 }
 NS_IMETHODIMP
 nsDownload::Retry()
 {
   return mDownloadManager->RetryDownload(mGUID);
 }
 bool
 nsDownload::IsPaused()
 {
   return mDownloadState == nsIDownloadManager::DOWNLOAD_PAUSED;
 }
 bool
 nsDownload::IsResumable()
 {
   return !mEntityID.IsEmpty();
 }
 bool
 nsDownload::WasResumed()
 {
   return mResumedAt != -1;
 }
 bool
 nsDownload::ShouldAutoResume()
 {
   return mAutoResume == AUTO_RESUME;
 }
 bool
 nsDownload::IsFinishable()
 {
   return mDownloadState == nsIDownloadManager::DOWNLOAD_NOTSTARTED ||
          mDownloadState == nsIDownloadManager::DOWNLOAD_QUEUED ||
          mDownloadState == nsIDownloadManager::DOWNLOAD_DOWNLOADING;
 }
 bool
 nsDownload::IsFinished()
 {
   return mDownloadState == nsIDownloadManager::DOWNLOAD_FINISHED;
 }
 nsresult
 nsDownload::UpdateDB()
 {
   NS_ASSERTION(mID, "Download ID is stored as zero.  This is bad!");
   NS_ASSERTION(mDownloadManager, "Egads!  We have no download manager!");
   mozIStorageStatement *stmt = mPrivate ?
     mDownloadManager->mUpdatePrivateDownloadStatement : mDownloadManager->mUpdateDownloadStatement;
   nsAutoString tempPath;
   if (mTempFile)
     (void)mTempFile->GetPath(tempPath);
   nsresult rv = stmt->BindStringByName(NS_LITERAL_CSTRING("tempPath"), tempPath);
   rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("startTime"), mStartTime);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("endTime"), mLastUpdate);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("state"), mDownloadState);
   NS_ENSURE_SUCCESS(rv, rv);
   if (mReferrer) {
     nsAutoCString referrer;
     rv = mReferrer->GetSpec(referrer);
     NS_ENSURE_SUCCESS(rv, rv);
     rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("referrer"), referrer);
   } else {
     rv = stmt->BindNullByName(NS_LITERAL_CSTRING("referrer"));
   }
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("entityID"), mEntityID);
   NS_ENSURE_SUCCESS(rv, rv);
   int64_t currBytes;
   (void)GetAmountTransferred(&currBytes);
   rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("currBytes"), currBytes);
   NS_ENSURE_SUCCESS(rv, rv);
   int64_t maxBytes;
   (void)GetSize(&maxBytes);
   rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("maxBytes"), maxBytes);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("autoResume"), mAutoResume);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("id"), mID);
   NS_ENSURE_SUCCESS(rv, rv);
   return stmt->Execute();
 }
 nsresult
 nsDownload::FailDownload(nsresult aStatus, const char16_t *aMessage)
 {
   // Grab the bundle before potentially losing our member variables
   nsCOMPtr<nsIStringBundle> bundle = mDownloadManager->mBundle;
   (void)SetState(nsIDownloadManager::DOWNLOAD_FAILED);
   // Get title for alert.
   nsXPIDLString title;
   nsresult rv = bundle->GetStringFromName(
     MOZ_UTF16("downloadErrorAlertTitle"), getter_Copies(title));
   NS_ENSURE_SUCCESS(rv, rv);
   // Get a generic message if we weren't supplied one
   nsXPIDLString message;
   message = aMessage;
   if (message.IsEmpty()) {
     rv = bundle->GetStringFromName(
       MOZ_UTF16("downloadErrorGeneric"), getter_Copies(message));
     NS_ENSURE_SUCCESS(rv, rv);
   }
   // Get Download Manager window to be parent of alert
   nsCOMPtr<nsIWindowMediator> wm =
     do_GetService(NS_WINDOWMEDIATOR_CONTRACTID, &rv);
   NS_ENSURE_SUCCESS(rv, rv);
   nsCOMPtr<nsIDOMWindow> dmWindow;
   rv = wm->GetMostRecentWindow(MOZ_UTF16("Download:Manager"),
                                getter_AddRefs(dmWindow));
   NS_ENSURE_SUCCESS(rv, rv);
   // Show alert
   nsCOMPtr<nsIPromptService> prompter =
     do_GetService("@mozilla.org/embedcomp/prompt-service;1", &rv);
   NS_ENSURE_SUCCESS(rv, rv);
   return prompter->Alert(dmWindow, title, message);
 }

The Tor Browser / annotate

toolkit/components/downloads/nsDownloadManager.cpp@925c144e1f1f (annotated)

toolkit/components/downloads/nsDownloadManager.cpp