pepper_flash_browser_host.cc revision eb525c5499e34cc9c4b825d6d9e75bb07cc06ace 
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
29using content::BrowserPpapiHost;
30using content::BrowserThread;
31using content::RenderProcessHost;
32
33namespace chrome {
34
35namespace {
36
37// Get the CookieSettings on the UI thread for the given render process ID.
38scoped_refptr<CookieSettings> GetCookieSettings(int render_process_id) {
39  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
40  RenderProcessHost* render_process_host = RenderProcessHost::FromID(
41      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
52PepperFlashBrowserHost::PepperFlashBrowserHost(
53    BrowserPpapiHost* host,
54    PP_Instance instance,
55    PP_Resource resource)
56    : ResourceHost(host->GetPpapiHost(), instance, resource),
57      host_(host),
58      weak_factory_(this) {
59  int unused;
60  host->GetRenderViewIDsForInstance(instance, &render_process_id_, &unused);
61}
62
63PepperFlashBrowserHost::~PepperFlashBrowserHost() {
64}
65
66int32_t PepperFlashBrowserHost::OnResourceMessageReceived(
67    const IPC::Message& msg,
68    ppapi::host::HostMessageContext* context) {
69  IPC_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,
76        OnGetLocalDataRestrictions);
77  IPC_END_MESSAGE_MAP()
78  return PP_ERROR_FAILED;
79}
80
81int32_t PepperFlashBrowserHost::OnUpdateActivity(
82    ppapi::host::HostMessageContext* host_context) {
83#if defined(OS_WIN)
84  // Reading then writing back the same value to the screensaver timeout system
85  // setting resets the countdown which prevents the screensaver from turning
86  // on "for a while". As long as the plugin pings us with this message faster
87  // than the screensaver timeout, it won't go on.
88  int value = 0;
89  if (SystemParametersInfo(SPI_GETSCREENSAVETIMEOUT, 0, &value, 0))
90    SystemParametersInfo(SPI_SETSCREENSAVETIMEOUT, value, NULL, 0);
91#elif defined(OS_MACOSX)
92  UpdateSystemActivity(OverallAct);
93#else
94  // TODO(brettw) implement this for other platforms.
95#endif
96  return PP_OK;
97}
98
99int32_t PepperFlashBrowserHost::OnGetLocalTimeZoneOffset(
100    ppapi::host::HostMessageContext* host_context,
101    const base::Time& t) {
102  // The reason for this processing being in the browser process is that on
103  // Linux, the localtime calls require filesystem access prohibited by the
104  // sandbox.
105  host_context->reply_msg = PpapiPluginMsg_Flash_GetLocalTimeZoneOffsetReply(
106      ppapi::PPGetLocalTimeZoneOffset(t));
107  return PP_OK;
108}
109
110int32_t PepperFlashBrowserHost::OnGetLocalDataRestrictions(
111    ppapi::host::HostMessageContext* context) {
112  // Getting the Flash LSO settings requires using the CookieSettings which
113  // belong to the profile which lives on the UI thread. We lazily initialize
114  // |cookie_settings_| by grabbing the reference from the UI thread and then
115  // call |GetLocalDataRestrictions| with it.
116  GURL document_url = host_->GetDocumentURLForInstance(pp_instance());
117  GURL plugin_url = host_->GetPluginURLForInstance(pp_instance());
118  if (cookie_settings_.get()) {
119    GetLocalDataRestrictions(context->MakeReplyMessageContext(), document_url,
120                             plugin_url, cookie_settings_);
121  } else {
122    BrowserThread::PostTaskAndReplyWithResult(BrowserThread::UI, FROM_HERE,
123        base::Bind(&GetCookieSettings, render_process_id_),
124        base::Bind(&PepperFlashBrowserHost::GetLocalDataRestrictions,
125                   weak_factory_.GetWeakPtr(),
126                   context->MakeReplyMessageContext(),
127                   document_url, plugin_url));
128  }
129  return PP_OK_COMPLETIONPENDING;
130}
131
132void PepperFlashBrowserHost::GetLocalDataRestrictions(
133    ppapi::host::ReplyMessageContext reply_context,
134    const GURL& document_url,
135    const GURL& plugin_url,
136    scoped_refptr<CookieSettings> cookie_settings) {
137  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
138
139  // Lazily initialize |cookie_settings_|. The cookie settings are thread-safe
140  // ref-counted so as long as we hold a reference to them we can safely access
141  // them on the IO thread.
142  if (!cookie_settings_.get()) {
143    cookie_settings_ = cookie_settings;
144  } else {
145    DCHECK(cookie_settings_.get() == cookie_settings.get());
146  }
147
148  PP_FlashLSORestrictions restrictions = PP_FLASHLSORESTRICTIONS_NONE;
149  if (cookie_settings_.get() && document_url.is_valid() &&
150      plugin_url.is_valid()) {
151    if (!cookie_settings_->IsReadingCookieAllowed(document_url, plugin_url))
152      restrictions = PP_FLASHLSORESTRICTIONS_BLOCK;
153    else if (cookie_settings_->IsCookieSessionOnly(plugin_url))
154      restrictions = PP_FLASHLSORESTRICTIONS_IN_MEMORY;
155  }
156  SendReply(reply_context, PpapiPluginMsg_Flash_GetLocalDataRestrictionsReply(
157      static_cast<int32_t>(restrictions)));
158}
159
160}  // namespace chrome
161