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
|
// Copyright 2013 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/desktop_streams_registry.h"
#include "base/base64.h"
#include "base/location.h"
#include "base/time/time.h"
#include "content/public/browser/browser_thread.h"
#include "crypto/random.h"
namespace {
const int kStreamIdLengthBytes = 16;
const int kApprovedStreamTimeToLiveSeconds = 10;
std::string GenerateRandomStreamId() {
char buffer[kStreamIdLengthBytes];
crypto::RandBytes(buffer, arraysize(buffer));
std::string result;
base::Base64Encode(base::StringPiece(buffer, arraysize(buffer)),
&result);
return result;
}
} // namespace
DesktopStreamsRegistry::DesktopStreamsRegistry() {}
DesktopStreamsRegistry::~DesktopStreamsRegistry() {}
std::string DesktopStreamsRegistry::RegisterStream(
int render_process_id,
int render_frame_id,
const GURL& origin,
const content::DesktopMediaID& source,
const std::string& extension_name) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
std::string id = GenerateRandomStreamId();
DCHECK(approved_streams_.find(id) == approved_streams_.end());
ApprovedDesktopMediaStream& stream = approved_streams_[id];
stream.render_process_id = render_process_id;
stream.render_frame_id = render_frame_id;
stream.origin = origin;
stream.source = source;
stream.extension_name = extension_name;
content::BrowserThread::PostDelayedTask(
content::BrowserThread::UI, FROM_HERE,
base::Bind(&DesktopStreamsRegistry::CleanupStream,
base::Unretained(this), id),
base::TimeDelta::FromSeconds(kApprovedStreamTimeToLiveSeconds));
return id;
}
content::DesktopMediaID DesktopStreamsRegistry::RequestMediaForStreamId(
const std::string& id,
int render_process_id,
int render_frame_id,
const GURL& origin,
std::string* extension_name) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
StreamsMap::iterator it = approved_streams_.find(id);
// Verify that if there is a request with the specified ID it was created for
// the same origin and the same renderer.
if (it == approved_streams_.end() ||
render_process_id != it->second.render_process_id ||
render_frame_id != it->second.render_frame_id ||
origin != it->second.origin) {
return content::DesktopMediaID();
}
content::DesktopMediaID result = it->second.source;
*extension_name = it->second.extension_name;
approved_streams_.erase(it);
return result;
}
void DesktopStreamsRegistry::CleanupStream(const std::string& id) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
approved_streams_.erase(id);
}
DesktopStreamsRegistry::ApprovedDesktopMediaStream::ApprovedDesktopMediaStream()
: render_process_id(-1), render_frame_id(-1) {}
|
