1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/media/media_permission.h"
#include "chrome/browser/media/media_capture_devices_dispatcher.h"
#include "chrome/browser/media/media_stream_device_permissions.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/pref_names.h"
#include "components/content_settings/core/browser/host_content_settings_map.h"
#include "content/public/common/url_constants.h"
#include "extensions/common/constants.h"
MediaPermission::MediaPermission(ContentSettingsType content_type,
content::MediaStreamRequestType request_type,
const GURL& origin,
const std::string& device_id,
Profile* profile)
: content_type_(content_type),
request_type_(request_type),
origin_(origin),
device_id_(device_id),
profile_(profile) {
}
ContentSetting MediaPermission::GetPermissionStatus(
content::MediaStreamRequestResult* denial_reason) const {
// Deny the request if the security origin is empty, this happens with
// file access without |--allow-file-access-from-files| flag.
if (origin_.is_empty()) {
*denial_reason = content::MEDIA_DEVICE_INVALID_SECURITY_ORIGIN;
return CONTENT_SETTING_BLOCK;
}
// Deny the request if there is no device attached to the OS of the requested
// type.
if (!HasAvailableDevices()) {
*denial_reason = content::MEDIA_DEVICE_NO_HARDWARE;
return CONTENT_SETTING_BLOCK;
}
// Check policy and content settings.
ContentSetting result = GetStoredContentSetting();
if (result == CONTENT_SETTING_BLOCK)
*denial_reason = content::MEDIA_DEVICE_PERMISSION_DENIED;
return result;
}
ContentSetting MediaPermission::GetStoredContentSetting() const {
// TODO(raymes): Merge this policy check into content settings
// crbug.com/244389.
const char* policy_name = nullptr;
const char* urls_policy_name = nullptr;
if (content_type_ == CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC) {
policy_name = prefs::kAudioCaptureAllowed;
urls_policy_name = prefs::kAudioCaptureAllowedUrls;
} else if (content_type_ == CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA) {
policy_name = prefs::kVideoCaptureAllowed;
urls_policy_name = prefs::kVideoCaptureAllowedUrls;
} else {
NOTREACHED();
}
MediaStreamDevicePolicy policy =
GetDevicePolicy(profile_, origin_, policy_name, urls_policy_name);
if (policy == ALWAYS_DENY)
return CONTENT_SETTING_BLOCK;
if (policy == ALWAYS_ALLOW)
return CONTENT_SETTING_ALLOW;
DCHECK(policy == POLICY_NOT_SET);
// Check the content setting.
ContentSetting setting =
profile_->GetHostContentSettingsMap()->GetContentSetting(
origin_, origin_, content_type_,
content_settings::ResourceIdentifier());
if (setting == CONTENT_SETTING_DEFAULT)
return CONTENT_SETTING_ASK;
// TODO(raymes): This is here for safety to ensure that we always ask the user
// even if a content setting is set to "allow" if the origin is insecure. In
// reality we shouldn't really need to check this here as we should respect
// the user's content setting. The problem is that pepper requests allow
// insecure origins to be persisted. We should stop allowing this, do some
// sort of migration and remove this check. See crbug.com/512301.
if (!ShouldPersistContentSetting(setting, origin_, request_type_) &&
!origin_.SchemeIs(extensions::kExtensionScheme) &&
!origin_.SchemeIs(content::kChromeUIScheme) &&
!origin_.SchemeIs(content::kChromeDevToolsScheme)) {
return CONTENT_SETTING_ASK;
}
return setting;
}
bool MediaPermission::HasAvailableDevices() const {
const content::MediaStreamDevices* devices = nullptr;
if (content_type_ == CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC) {
devices =
&MediaCaptureDevicesDispatcher::GetInstance()->GetAudioCaptureDevices();
} else if (content_type_ == CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA) {
devices =
&MediaCaptureDevicesDispatcher::GetInstance()->GetVideoCaptureDevices();
} else {
NOTREACHED();
}
// TODO(tommi): It's kind of strange to have this here since if we fail this
// test, there'll be a UI shown that indicates to the user that access to
// non-existing audio/video devices has been denied. The user won't have
// any way to change that but there will be a UI shown which indicates that
// access is blocked.
if (devices->empty())
return false;
// Note: we check device_id before dereferencing devices. If the requested
// device id is non-empty, then the corresponding device list must not be
// NULL.
if (!device_id_.empty() && !devices->FindById(device_id_))
return false;
return true;
}
|
