108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
// Copyright 2020 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 "cast/streaming/sender_message.h"
|
|
|
|
#include <utility>
|
|
|
|
#include "absl/strings/ascii.h"
|
|
#include "cast/streaming/message_fields.h"
|
|
#include "util/base64.h"
|
|
#include "util/enum_name_table.h"
|
|
#include "util/json/json_helpers.h"
|
|
#include "util/json/json_serialization.h"
|
|
|
|
namespace openscreen {
|
|
namespace cast {
|
|
|
|
namespace {
|
|
|
|
EnumNameTable<SenderMessage::Type, 4> kMessageTypeNames{
|
|
{{kMessageTypeOffer, SenderMessage::Type::kOffer},
|
|
{"GET_STATUS", SenderMessage::Type::kGetStatus},
|
|
{"GET_CAPABILITIES", SenderMessage::Type::kGetCapabilities},
|
|
{"RPC", SenderMessage::Type::kRpc}}};
|
|
|
|
SenderMessage::Type GetMessageType(const Json::Value& root) {
|
|
std::string type;
|
|
if (!json::ParseAndValidateString(root[kMessageType], &type)) {
|
|
return SenderMessage::Type::kUnknown;
|
|
}
|
|
|
|
absl::AsciiStrToUpper(&type);
|
|
ErrorOr<SenderMessage::Type> parsed = GetEnum(kMessageTypeNames, type);
|
|
|
|
return parsed.value(SenderMessage::Type::kUnknown);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
// static
|
|
ErrorOr<SenderMessage> SenderMessage::Parse(const Json::Value& value) {
|
|
if (!value) {
|
|
return Error(Error::Code::kParameterInvalid, "Empty JSON");
|
|
}
|
|
|
|
SenderMessage message;
|
|
message.type = GetMessageType(value);
|
|
if (!json::ParseAndValidateInt(value[kSequenceNumber],
|
|
&(message.sequence_number))) {
|
|
message.sequence_number = -1;
|
|
}
|
|
|
|
if (message.type == SenderMessage::Type::kOffer) {
|
|
ErrorOr<Offer> offer = Offer::Parse(value[kOfferMessageBody]);
|
|
if (offer.is_value()) {
|
|
message.body = std::move(offer.value());
|
|
message.valid = true;
|
|
}
|
|
} else if (message.type == SenderMessage::Type::kRpc) {
|
|
std::string rpc_body;
|
|
if (json::ParseAndValidateString(value[kRpcMessageBody], &rpc_body) &&
|
|
base64::Decode(rpc_body, &rpc_body)) {
|
|
message.body = rpc_body;
|
|
message.valid = true;
|
|
}
|
|
} else if (message.type == SenderMessage::Type::kGetStatus ||
|
|
message.type == SenderMessage::Type::kGetCapabilities) {
|
|
// These types of messages just don't have a body.
|
|
message.valid = true;
|
|
}
|
|
|
|
return message;
|
|
}
|
|
|
|
ErrorOr<Json::Value> SenderMessage::ToJson() const {
|
|
OSP_CHECK(type != SenderMessage::Type::kUnknown)
|
|
<< "Trying to send an unknown message is a developer error";
|
|
|
|
Json::Value root;
|
|
ErrorOr<const char*> message_type = GetEnumName(kMessageTypeNames, type);
|
|
root[kMessageType] = message_type.value();
|
|
if (sequence_number >= 0) {
|
|
root[kSequenceNumber] = sequence_number;
|
|
}
|
|
|
|
switch (type) {
|
|
case SenderMessage::Type::kOffer:
|
|
root[kOfferMessageBody] = absl::get<Offer>(body).ToJson().value();
|
|
break;
|
|
|
|
case SenderMessage::Type::kRpc:
|
|
root[kRpcMessageBody] = base64::Encode(absl::get<std::string>(body));
|
|
break;
|
|
|
|
case SenderMessage::Type::kGetCapabilities: // fallthrough
|
|
case SenderMessage::Type::kGetStatus:
|
|
break;
|
|
|
|
default:
|
|
OSP_NOTREACHED();
|
|
}
|
|
return root;
|
|
}
|
|
|
|
} // namespace cast
|
|
} // namespace openscreen
|