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
|
// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/mirroring/service/rpc_dispatcher_impl.h"
#include <utility>
#include <variant>
#include <vector>
#include "base/logging.h"
#include "third_party/openscreen/src/platform/base/span.h"
namespace mirroring {
RpcDispatcherImpl::RpcDispatcherImpl(
openscreen::cast::SenderSessionMessenger& messenger)
: messenger_(messenger) {}
RpcDispatcherImpl::~RpcDispatcherImpl() {
Unsubscribe();
}
void RpcDispatcherImpl::Subscribe(RpcDispatcher::ResponseCallback callback) {
callback_ = std::move(callback);
messenger_->SetHandler(
openscreen::cast::ReceiverMessage::Type::kRpc,
// Use of `this` is safe because we unsubscribe on destruction.
[this](openscreen::ErrorOr<openscreen::cast::ReceiverMessage> message) {
OnMessage(std::move(message));
});
}
void RpcDispatcherImpl::Unsubscribe() {
if (callback_) {
callback_.Reset();
messenger_->ResetHandler(openscreen::cast::ReceiverMessage::Type::kRpc);
}
}
bool RpcDispatcherImpl::SendOutboundMessage(base::span<const uint8_t> message) {
const openscreen::Error error = messenger_->SendRpcMessage(
openscreen::ByteView(message.data(), message.size()));
return error.ok();
}
void RpcDispatcherImpl::OnMessage(
openscreen::ErrorOr<openscreen::cast::ReceiverMessage> message) {
// TODO(crbug.com/40237878): RpcDispatcherImpl should have error
// reporting.
if (message.is_error()) {
DLOG(ERROR) << __func__
<< ": had a message error: " << message.error().ToString();
return;
}
DCHECK_EQ(openscreen::cast::ReceiverMessage::Type::kRpc,
message.value().type);
// We may get messages before subscription is completed.
if (callback_) {
callback_.Run(std::get<std::vector<uint8_t>>(message.value().body));
} else {
DVLOG(1) << __func__ << ": received a message but no callback registered.";
}
}
} // namespace mirroring
|
