src/chrome/browser/plugins/plugin_installer.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/plugins/plugin_installer.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/process/process.h"
  10 #include "base/strings/stringprintf.h"
  11 #include "chrome/browser/download/download_stats.h"
  12 #include "chrome/browser/platform_util.h"
  13 #include "chrome/browser/plugins/plugin_installer_observer.h"
  14 #include "content/public/browser/browser_context.h"
  15 #include "content/public/browser/download_item.h"
  16 #include "content/public/browser/download_manager.h"
  17 #include "content/public/browser/download_url_parameters.h"
  18 #include "content/public/browser/web_contents.h"
  19
  20 using content::DownloadItem;
  21
  22 PluginInstaller::PluginInstaller()
  23     : state_(INSTALLER_STATE_IDLE),
  24       strong_observer_count_(0) {
  25 }
  26
  27 PluginInstaller::~PluginInstaller() {
  28 }
  29
  30 void PluginInstaller::OnDownloadUpdated(DownloadItem* download) {
  31   DownloadItem::DownloadState state = download->GetState();
  32   switch (state) {
  33     case DownloadItem::IN_PROGRESS:
  34       return;
  35     case DownloadItem::COMPLETE: {
  36       DCHECK_EQ(INSTALLER_STATE_DOWNLOADING, state_);
  37       state_ = INSTALLER_STATE_IDLE;
  38       FOR_EACH_OBSERVER(PluginInstallerObserver, observers_,
  39                         DownloadFinished());
  40       break;
  41     }
  42     case DownloadItem::CANCELLED: {
  43       DownloadCancelled();
  44       break;
  45     }
  46     case DownloadItem::INTERRUPTED: {
  47       content::DownloadInterruptReason reason = download->GetLastReason();
  48       DownloadError(content::DownloadInterruptReasonToString(reason));
  49       break;
  50     }
  51     case DownloadItem::MAX_DOWNLOAD_STATE: {
  52       NOTREACHED();
  53       return;
  54     }
  55   }
  56   download->RemoveObserver(this);
  57 }
  58
  59 void PluginInstaller::OnDownloadDestroyed(DownloadItem* download) {
  60   DCHECK_EQ(INSTALLER_STATE_DOWNLOADING, state_);
  61   state_ = INSTALLER_STATE_IDLE;
  62   download->RemoveObserver(this);
  63 }
  64
  65 void PluginInstaller::AddObserver(PluginInstallerObserver* observer) {
  66   strong_observer_count_++;
  67   observers_.AddObserver(observer);
  68 }
  69
  70 void PluginInstaller::RemoveObserver(PluginInstallerObserver* observer) {
  71   strong_observer_count_--;
  72   observers_.RemoveObserver(observer);
  73   if (strong_observer_count_ == 0) {
  74     FOR_EACH_OBSERVER(WeakPluginInstallerObserver, weak_observers_,
  75                       OnlyWeakObserversLeft());
  76   }
  77 }
  78
  79 void PluginInstaller::AddWeakObserver(WeakPluginInstallerObserver* observer) {
  80   weak_observers_.AddObserver(observer);
  81 }
  82
  83 void PluginInstaller::RemoveWeakObserver(
  84     WeakPluginInstallerObserver* observer) {
  85   weak_observers_.RemoveObserver(observer);
  86 }
  87
  88 void PluginInstaller::StartInstalling(const GURL& plugin_url,
  89                                       content::WebContents* web_contents) {
  90   content::DownloadManager* download_manager =
  91       content::BrowserContext::GetDownloadManager(
  92           web_contents->GetBrowserContext());
  93   StartInstallingWithDownloadManager(
  94       plugin_url, web_contents, download_manager);
  95 }
  96
  97 void PluginInstaller::StartInstallingWithDownloadManager(
  98     const GURL& plugin_url,
  99     content::WebContents* web_contents,
 100     content::DownloadManager* download_manager) {
 101   DCHECK_EQ(INSTALLER_STATE_IDLE, state_);
 102   state_ = INSTALLER_STATE_DOWNLOADING;
 103   FOR_EACH_OBSERVER(PluginInstallerObserver, observers_, DownloadStarted());
 104   scoped_ptr<content::DownloadUrlParameters> download_parameters(
 105       content::DownloadUrlParameters::FromWebContents(web_contents,
 106                                                       plugin_url));
 107   download_parameters->set_callback(
 108       base::Bind(&PluginInstaller::DownloadStarted, base::Unretained(this)));
 109   RecordDownloadSource(DOWNLOAD_INITIATED_BY_PLUGIN_INSTALLER);
 110   download_manager->DownloadUrl(download_parameters.Pass());
 111 }
 112
 113 void PluginInstaller::DownloadStarted(
 114     content::DownloadItem* item,
 115     content::DownloadInterruptReason interrupt_reason) {
 116   if (interrupt_reason != content::DOWNLOAD_INTERRUPT_REASON_NONE) {
 117     std::string msg = base::StringPrintf(
 118         "Error %d: %s",
 119         interrupt_reason,
 120         content::DownloadInterruptReasonToString(interrupt_reason).c_str());
 121     DownloadError(msg);
 122     return;
 123   }
 124   item->SetOpenWhenComplete(true);
 125   item->AddObserver(this);
 126 }
 127
 128 void PluginInstaller::OpenDownloadURL(const GURL& plugin_url,
 129                                       content::WebContents* web_contents) {
 130   DCHECK_EQ(INSTALLER_STATE_IDLE, state_);
 131   web_contents->OpenURL(content::OpenURLParams(
 132       plugin_url,
 133       content::Referrer(web_contents->GetURL(),
 134                         blink::WebReferrerPolicyDefault),
 135       NEW_FOREGROUND_TAB, content::PAGE_TRANSITION_TYPED, false));
 136   FOR_EACH_OBSERVER(PluginInstallerObserver, observers_, DownloadFinished());
 137 }
 138
 139 void PluginInstaller::DownloadError(const std::string& msg) {
 140   DCHECK_EQ(INSTALLER_STATE_DOWNLOADING, state_);
 141   state_ = INSTALLER_STATE_IDLE;
 142   FOR_EACH_OBSERVER(PluginInstallerObserver, observers_, DownloadError(msg));
 143 }
 144
 145 void PluginInstaller::DownloadCancelled() {
 146   DCHECK_EQ(INSTALLER_STATE_DOWNLOADING, state_);
 147   state_ = INSTALLER_STATE_IDLE;
 148   FOR_EACH_OBSERVER(PluginInstallerObserver, observers_, DownloadCancelled());
 149 }