chrome/browser/renderer_host/pepper/pepper_flash_browser_host.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/renderer_host/pepper/pepper_flash_browser_host.h"
   6
   7 #include "base/time/time.h"
   8 #include "chrome/browser/content_settings/cookie_settings_factory.h"
   9 #include "chrome/browser/profiles/profile.h"
  10 #include "components/content_settings/core/browser/cookie_settings.h"
  11 #include "content/public/browser/browser_context.h"
  12 #include "content/public/browser/browser_ppapi_host.h"
  13 #include "content/public/browser/browser_thread.h"
  14 #include "content/public/browser/render_process_host.h"
  15 #include "ipc/ipc_message_macros.h"
  16 #include "ppapi/c/pp_errors.h"
  17 #include "ppapi/c/private/ppb_flash.h"
  18 #include "ppapi/host/dispatch_host_message.h"
  19 #include "ppapi/proxy/ppapi_messages.h"
  20 #include "ppapi/proxy/resource_message_params.h"
  21 #include "ppapi/shared_impl/time_conversion.h"
  22 #include "url/gurl.h"
  23
  24 #if defined(OS_WIN)
  25 #include <windows.h>
  26 #elif defined(OS_MACOSX)
  27 #include <CoreServices/CoreServices.h>
  28 #endif
  29
  30 using content::BrowserPpapiHost;
  31 using content::BrowserThread;
  32 using content::RenderProcessHost;
  33
  34 namespace chrome {
  35
  36 namespace {
  37
  38 // Get the CookieSettings on the UI thread for the given render process ID.
  39 scoped_refptr<content_settings::CookieSettings> GetCookieSettings(
  40     int render_process_id) {
  41   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  42   RenderProcessHost* render_process_host =
  43       RenderProcessHost::FromID(render_process_id);
  44   if (render_process_host && render_process_host->GetBrowserContext()) {
  45     Profile* profile =
  46         Profile::FromBrowserContext(render_process_host->GetBrowserContext());
  47     return CookieSettingsFactory::GetForProfile(profile);
  48   }
  49   return NULL;
  50 }
  51
  52 }  // namespace
  53
  54 PepperFlashBrowserHost::PepperFlashBrowserHost(BrowserPpapiHost* host,
  55                                                PP_Instance instance,
  56                                                PP_Resource resource)
  57     : ResourceHost(host->GetPpapiHost(), instance, resource),
  58       host_(host),
  59       weak_factory_(this) {
  60   int unused;
  61   host->GetRenderFrameIDsForInstance(instance, &render_process_id_, &unused);
  62 }
  63
  64 PepperFlashBrowserHost::~PepperFlashBrowserHost() {}
  65
  66 int32_t PepperFlashBrowserHost::OnResourceMessageReceived(
  67     const IPC::Message& msg,
  68     ppapi::host::HostMessageContext* context) {
  69   PPAPI_BEGIN_MESSAGE_MAP(PepperFlashBrowserHost, msg)
  70     PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_Flash_UpdateActivity,
  71                                         OnUpdateActivity)
  72     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_GetLocalTimeZoneOffset,
  73                                       OnGetLocalTimeZoneOffset)
  74     PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(
  75         PpapiHostMsg_Flash_GetLocalDataRestrictions, OnGetLocalDataRestrictions)
  76   PPAPI_END_MESSAGE_MAP()
  77   return PP_ERROR_FAILED;
  78 }
  79
  80 int32_t PepperFlashBrowserHost::OnUpdateActivity(
  81     ppapi::host::HostMessageContext* host_context) {
  82 #if defined(OS_WIN)
  83   // Reading then writing back the same value to the screensaver timeout system
  84   // setting resets the countdown which prevents the screensaver from turning
  85   // on "for a while". As long as the plugin pings us with this message faster
  86   // than the screensaver timeout, it won't go on.
  87   int value = 0;
  88   if (SystemParametersInfo(SPI_GETSCREENSAVETIMEOUT, 0, &value, 0))
  89     SystemParametersInfo(SPI_SETSCREENSAVETIMEOUT, value, NULL, 0);
  90 #elif defined(OS_MACOSX)
  91   UpdateSystemActivity(OverallAct);
  92 #else
  93 // TODO(brettw) implement this for other platforms.
  94 #endif
  95   return PP_OK;
  96 }
  97
  98 int32_t PepperFlashBrowserHost::OnGetLocalTimeZoneOffset(
  99     ppapi::host::HostMessageContext* host_context,
 100     const base::Time& t) {
 101   // The reason for this processing being in the browser process is that on
 102   // Linux, the localtime calls require filesystem access prohibited by the
 103   // sandbox.
 104   host_context->reply_msg = PpapiPluginMsg_Flash_GetLocalTimeZoneOffsetReply(
 105       ppapi::PPGetLocalTimeZoneOffset(t));
 106   return PP_OK;
 107 }
 108
 109 int32_t PepperFlashBrowserHost::OnGetLocalDataRestrictions(
 110     ppapi::host::HostMessageContext* context) {
 111   // Getting the Flash LSO settings requires using the CookieSettings which
 112   // belong to the profile which lives on the UI thread. We lazily initialize
 113   // |cookie_settings_| by grabbing the reference from the UI thread and then
 114   // call |GetLocalDataRestrictions| with it.
 115   GURL document_url = host_->GetDocumentURLForInstance(pp_instance());
 116   GURL plugin_url = host_->GetPluginURLForInstance(pp_instance());
 117   if (cookie_settings_.get()) {
 118     GetLocalDataRestrictions(context->MakeReplyMessageContext(),
 119                              document_url,
 120                              plugin_url,
 121                              cookie_settings_);
 122   } else {
 123     BrowserThread::PostTaskAndReplyWithResult(
 124         BrowserThread::UI,
 125         FROM_HERE,
 126         base::Bind(&GetCookieSettings, render_process_id_),
 127         base::Bind(&PepperFlashBrowserHost::GetLocalDataRestrictions,
 128                    weak_factory_.GetWeakPtr(),
 129                    context->MakeReplyMessageContext(),
 130                    document_url,
 131                    plugin_url));
 132   }
 133   return PP_OK_COMPLETIONPENDING;
 134 }
 135
 136 void PepperFlashBrowserHost::GetLocalDataRestrictions(
 137     ppapi::host::ReplyMessageContext reply_context,
 138     const GURL& document_url,
 139     const GURL& plugin_url,
 140     scoped_refptr<content_settings::CookieSettings> cookie_settings) {
 141   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 142
 143   // Lazily initialize |cookie_settings_|. The cookie settings are thread-safe
 144   // ref-counted so as long as we hold a reference to them we can safely access
 145   // them on the IO thread.
 146   if (!cookie_settings_.get()) {
 147     cookie_settings_ = cookie_settings;
 148   } else {
 149     DCHECK(cookie_settings_.get() == cookie_settings.get());
 150   }
 151
 152   PP_FlashLSORestrictions restrictions = PP_FLASHLSORESTRICTIONS_NONE;
 153   if (cookie_settings_.get() && document_url.is_valid() &&
 154       plugin_url.is_valid()) {
 155     if (!cookie_settings_->IsReadingCookieAllowed(document_url, plugin_url))
 156       restrictions = PP_FLASHLSORESTRICTIONS_BLOCK;
 157     else if (cookie_settings_->IsCookieSessionOnly(plugin_url))
 158       restrictions = PP_FLASHLSORESTRICTIONS_IN_MEMORY;
 159   }
 160   SendReply(reply_context,
 161             PpapiPluginMsg_Flash_GetLocalDataRestrictionsReply(
 162                 static_cast<int32_t>(restrictions)));
 163 }
 164
 165 }  // namespace chrome