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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/api/messaging/native_message_echo_host.h"
#include <optional>
#include <utility>
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/task/single_thread_task_runner.h"
#include "base/values.h"
#include "content/public/browser/browser_context.h"
namespace extensions {
// static
std::unique_ptr<NativeMessageHost> NativeMessageEchoHost::Create(
content::BrowserContext* browser_context) {
return std::make_unique<NativeMessageEchoHost>();
}
NativeMessageEchoHost::NativeMessageEchoHost() = default;
NativeMessageEchoHost::~NativeMessageEchoHost() = default;
void NativeMessageEchoHost::Start(Client* client) {
client_ = client;
}
void NativeMessageEchoHost::OnMessage(const std::string& request_string) {
std::optional<base::Value> request_value =
base::JSONReader::Read(request_string);
if (!request_value.has_value()) {
client_->CloseChannel(kHostInputOutputError);
} else if (request_string.find("stopHostTest") != std::string::npos) {
client_->CloseChannel(kNativeHostExited);
} else if (request_string.find("bigMessageTest") != std::string::npos) {
client_->CloseChannel(kHostInputOutputError);
} else if (request_string.find("sendInvalidResponse") != std::string::npos) {
SendInvalidResponse();
} else {
ProcessEcho(request_value->GetDict());
}
}
scoped_refptr<base::SingleThreadTaskRunner> NativeMessageEchoHost::task_runner()
const {
return base::SingleThreadTaskRunner::GetCurrentDefault();
}
void NativeMessageEchoHost::ProcessEcho(const base::Value::Dict& request) {
base::Value::Dict response;
response.Set("id", ++message_number_);
response.Set("echo", request.Clone());
response.Set("caller_url", kOrigins[0]);
std::string response_string;
base::JSONWriter::Write(response, &response_string);
client_->PostMessageFromNativeHost(response_string);
}
void NativeMessageEchoHost::SendInvalidResponse() {
// Send a malformed JSON string.
client_->PostMessageFromNativeHost("{");
}
} // namespace extensions
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