
/*
 * Copyright 2011-2022 Cuberite Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Google.cpp

// Implements a HTTP download of the google's front page using the LibEvent-based cNetwork API

#include "Globals.h"
#include <thread>
#include "OSSupport/Event.h"
#include "OSSupport/Network.h"
#include "OSSupport/NetworkSingleton.h"





/** Connect callbacks that send a HTTP GET request for google.com when connected. */
class cHTTPConnectCallbacks:
	public cNetwork::cConnectCallbacks
{
	cEvent & m_Event;
	virtual void OnConnected(cTCPLink & a_Link) override
	{
		LOGD("Connected, sending HTTP GET");
		if (!a_Link.Send("GET / HTTP/1.0\r\nHost:google.com\r\n\r\n"))
		{
			LOGWARNING("Sending HTTP GET failed");
		}
		LOGD("HTTP GET queued.");
	}

	virtual void OnError(int a_ErrorCode, const AString & a_ErrorMsg) override
	{
		LOGD("Error while connecting HTTP: %d (%s)", a_ErrorCode, a_ErrorMsg.c_str());
		m_Event.Set();
	}

public:
	cHTTPConnectCallbacks(cEvent & a_Event):
		m_Event(a_Event)
	{
	}
};





/** cTCPLink callbacks that dump everything it received to the log. */
class cDumpCallbacks:
	public cTCPLink::cCallbacks
{
	cEvent & m_Event;
	cTCPLinkPtr m_Link;

	virtual void OnLinkCreated(cTCPLinkPtr a_Link) override
	{
		ASSERT(m_Link == nullptr);
		m_Link = a_Link;
	}

	virtual void OnReceivedData(const char * a_Data, size_t a_Size) override
	{
		ASSERT(m_Link != nullptr);

		// Log the incoming data size:
		AString Hex;
		CreateHexDump(Hex, a_Data, a_Size, 16);
		LOGD("Incoming data: %u bytes:\n%s", static_cast<unsigned>(a_Size), Hex.c_str());
	}

	virtual void OnRemoteClosed(void) override
	{
		ASSERT(m_Link != nullptr);

		LOGD("Remote has closed the connection.");
		m_Link.reset();
		m_Event.Set();
	}

	virtual void OnError(int a_ErrorCode, const AString & a_ErrorMsg) override
	{
		ASSERT(m_Link != nullptr);

		LOGD("Error %d (%s) in the cDumpCallbacks.", a_ErrorCode, a_ErrorMsg.c_str());
		m_Link.reset();
		m_Event.Set();
	}

public:
	cDumpCallbacks(cEvent & a_Event):
		m_Event(a_Event)
	{
	}
};





static void DoTest(void)
{
	cEvent evtFinish;

	LOGD("Network test: Connecting to google.com:80, reading front page via HTTP.");
	if (!cNetwork::Connect("google.com", 80, std::make_shared<cHTTPConnectCallbacks>(evtFinish), std::make_shared<cDumpCallbacks>(evtFinish)))
	{
		LOGWARNING("Cannot queue connection to google.com");
		abort();
	}
	LOGD("Connect request has been queued.");
	
	evtFinish.Wait();
}





int main()
{
	LOGD("Initializing cNetwork...\n");
	cNetworkSingleton::Get().Initialise();

	LOGD("Testing...");
	DoTest();

	cNetworkSingleton::Get().Terminate();
	LOGD("Network test finished");

	return 0;
}




