qswiki/qswiki.cpp

/* Copyright (c) 2018 Albert S.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include <iostream>
#include <fstream>
#include <exception>
#include <signal.h>
#include <unistd.h>
#include <sys/types.h>
#include <filesystem>
#include "gateway/gatewayinterface.h"
#include "gateway/gatewayfactory.h"
#include "handlers/handlerfactory.h"
#include "database/databasefactory.h"
#include "config.h"
#include "template.h"
#include "session.h"
#include "logger.h"
#include "urlprovider.h"
#include "requestworker.h"
#include "cache/fscache.h"
#include "sandbox/sandboxfactory.h"
#include "iparser.h"
#include "parserlegacy.h"
#include "parsermarkdown.h"

void sigterm_handler(int arg)
{
	// TODO: proper shutdown.
	exit(EXIT_SUCCESS);
}

void setup_signal_handlers()
{
	struct sigaction sigtermaction;
	sigtermaction.sa_handler = &sigterm_handler;

	int ret = sigaction(SIGTERM, &sigtermaction, NULL);
	if(ret == -1)
	{
		perror("sigaction");
		exit(EXIT_FAILURE);
	}
}

std::unique_ptr<ICache> createCache(const ConfigVariableResolver &resolver)
{

	std::string path = resolver.getConfig("cache_fs_dir");

	return std::make_unique<FsCache>(path);
}

std::unique_ptr<IParser> createParser(const ConfigVariableResolver &resolver)
{
	std::string parser = resolver.getConfig("parser");
	if(parser == "legacy")
	{
		return std::make_unique<ParserLegacy>();
	}
	return std::make_unique<ParserMarkdown>();
}

int main(int argc, char **argv)
{
	if(geteuid() == 0)
	{
		std::cerr << "Do not run this as root!" << std::endl;
		return 1;
	}
	auto sandbox = createSandbox();
	// TODO: do we want to keep it mandatory or configurable?
	if(!sandbox->supported())
	{
		Logger::error() << "Sandbox is not supported, exiting";
		exit(EXIT_FAILURE);
	}
	if(!sandbox->enableForInit())
	{
		Logger::error() << "Sandboxing for init mode could not be activated.";
		exit(EXIT_FAILURE);
	}

	if(argc < 2)
	{
		std::cerr << "no path to config file provided" << std::endl;
		return 1;
	}

	try
	{
		ConfigReader configreader(argv[1]);
		Config config = configreader.readConfig();

		// TODO: config.connectiontring only works as long as we only support sqlite of course
		if(!sandbox->enablePreWorker({
			   config.configVarResolver.getConfig("cache_fs_dir"),
			   config.templatepath,
			   std::filesystem::path(config.logfile).parent_path(),
			   std::filesystem::path(config.connectionstring).parent_path(),
		   }))
		{
			Logger::error() << "Sandboxing for pre worker stage could not be activated.";
			exit(EXIT_FAILURE);
		}

		setup_signal_handlers();

		std::fstream logstream;
		logstream.open(config.logfile, std::fstream::out | std::fstream::app);
		Logger::setStream(&logstream);

		auto database = createDatabase(config);

		// TODO: quite ugly, anon-handling must be rethought
		auto userdao = database->createUserDao();
		std::optional<User> anon = userdao->find(config.handlersConfig.anon_username);
		if(!anon)
		{
			throw std::runtime_error("No such anon user in database");
		}
		if(anon->enabled)
		{
			throw std::runtime_error("Anon user cannot be enabled");
		}
		anon->permissions = config.handlersConfig.anon_permissions;
		userdao->save(anon.value());
		User::setAnon(anon.value());

		Template siteTemplate{config.templateprefix, config.templatepath, config.urls, config.configVarResolver};
		UrlProvider urlProvider{config.urls};

		auto cache = createCache(config.configVarResolver);
		cache->clear();

		auto parser = createParser(config.configVarResolver);


		HandlerFactory handlerFactory{config.handlersConfig, siteTemplate, *database.get(), urlProvider, *cache.get(), *parser.get()};
		RequestWorker requestWorker{handlerFactory, database->createSessionDao(), siteTemplate};

		auto interface = createGateway(config);

		if(!sandbox->enableForWorker())
		{
			Logger::error() << "Sandboxing for worker could not be enabled!";
			exit(EXIT_FAILURE);
		}
		interface->work(requestWorker);
	}
	catch(const std::exception &e)
	{
		Logger::error() << e.what();
		std::cerr << e.what() << std::endl;
	}
	return 0;
}