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