pepper_flash_browser_host.cc revision a02191e04bc25c4935f804f2c080ae28663d096d 
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 =
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
52PepperFlashBrowserHost::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
62PepperFlashBrowserHost::~PepperFlashBrowserHost() {}
63
64int32_t PepperFlashBrowserHost::OnResourceMessageReceived(
65    const IPC::Message& msg,
66    ppapi::host::HostMessageContext* context) {
67  IPC_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  IPC_END_MESSAGE_MAP()
75  return PP_ERROR_FAILED;
76}
77
78int32_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
96int32_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
107int32_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
134void 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
164