minetest/src/serverlist.cpp

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/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <fstream>
#include <iostream>
#include <sstream>
#include <algorithm>
#include "version.h"
#include "settings.h"
#include "serverlist.h"
#include "filesys.h"
#include "porting.h"
#include "log.h"
#include "network/networkprotocol.h"
#include <json/json.h>
#include "convert_json.h"
#include "httpfetch.h"
#include "util/string.h"
namespace ServerList
{
std::string getFilePath()
{
std::string serverlist_file = g_settings->get("serverlist_file");
std::string dir_path = "client" DIR_DELIM "serverlist" DIR_DELIM;
fs::CreateDir(porting::path_user + DIR_DELIM "client");
fs::CreateDir(porting::path_user + DIR_DELIM + dir_path);
return porting::path_user + DIR_DELIM + dir_path + serverlist_file;
}
std::vector<ServerListSpec> getLocal()
{
std::string path = ServerList::getFilePath();
std::string liststring;
fs::ReadFile(path, liststring);
return deSerialize(liststring);
}
std::vector<ServerListSpec> getOnline()
{
std::ostringstream geturl;
u16 proto_version_min = CLIENT_PROTOCOL_VERSION_MIN;
geturl << g_settings->get("serverlist_url") <<
"/list?proto_version_min=" << proto_version_min <<
"&proto_version_max=" << CLIENT_PROTOCOL_VERSION_MAX;
Json::Value root = fetchJsonValue(geturl.str(), NULL);
std::vector<ServerListSpec> server_list;
if (!root.isObject()) {
return server_list;
}
root = root["list"];
if (!root.isArray()) {
return server_list;
}
for (const Json::Value &i : root) {
if (i.isObject()) {
server_list.push_back(i);
}
}
return server_list;
}
// Delete a server from the local favorites list
bool deleteEntry(const ServerListSpec &server)
{
std::vector<ServerListSpec> serverlist = ServerList::getLocal();
for (std::vector<ServerListSpec>::iterator it = serverlist.begin();
it != serverlist.end();) {
if ((*it)["address"] == server["address"] &&
(*it)["port"] == server["port"]) {
it = serverlist.erase(it);
} else {
++it;
}
}
std::string path = ServerList::getFilePath();
std::ostringstream ss(std::ios_base::binary);
ss << ServerList::serialize(serverlist);
if (!fs::safeWriteToFile(path, ss.str()))
return false;
return true;
}
// Insert a server to the local favorites list
bool insert(const ServerListSpec &server)
{
// Remove duplicates
ServerList::deleteEntry(server);
std::vector<ServerListSpec> serverlist = ServerList::getLocal();
// Insert new server at the top of the list
serverlist.insert(serverlist.begin(), server);
std::string path = ServerList::getFilePath();
std::ostringstream ss(std::ios_base::binary);
ss << ServerList::serialize(serverlist);
if (!fs::safeWriteToFile(path, ss.str()))
return false;
return true;
}
std::vector<ServerListSpec> deSerialize(const std::string &liststring)
{
std::vector<ServerListSpec> serverlist;
std::istringstream stream(liststring);
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std::string line, tmp;
while (std::getline(stream, line)) {
std::transform(line.begin(), line.end(), line.begin(), ::toupper);
if (line == "[SERVER]") {
ServerListSpec server;
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std::getline(stream, tmp);
server["name"] = tmp;
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std::getline(stream, tmp);
server["address"] = tmp;
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std::getline(stream, tmp);
server["port"] = tmp;
bool unique = true;
for (const ServerListSpec &added : serverlist) {
if (server["name"] == added["name"]
&& server["port"] == added["port"]) {
unique = false;
break;
}
}
if (!unique)
continue;
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std::getline(stream, tmp);
server["description"] = tmp;
serverlist.push_back(server);
}
}
return serverlist;
}
const std::string serialize(const std::vector<ServerListSpec> &serverlist)
{
std::string liststring;
for (const ServerListSpec &it : serverlist) {
liststring += "[server]\n";
liststring += it["name"].asString() + '\n';
liststring += it["address"].asString() + '\n';
liststring += it["port"].asString() + '\n';
liststring += it["description"].asString() + '\n';
liststring += '\n';
}
return liststring;
}
const std::string serializeJson(const std::vector<ServerListSpec> &serverlist)
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{
Json::Value root;
Json::Value list(Json::arrayValue);
for (const ServerListSpec &it : serverlist) {
list.append(it);
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}
root["list"] = list;
return fastWriteJson(root);
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}
#if USE_CURL
void sendAnnounce(AnnounceAction action,
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const u16 port,
const std::vector<std::string> &clients_names,
const double uptime,
const u32 game_time,
const float lag,
const std::string &gameid,
const std::string &mg_name,
const std::vector<ModSpec> &mods,
bool dedicated)
{
static const char *aa_names[] = {"start", "update", "delete"};
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Json::Value server;
server["action"] = aa_names[action];
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server["port"] = port;
if (g_settings->exists("server_address")) {
server["address"] = g_settings->get("server_address");
}
if (action != AA_DELETE) {
bool strict_checking = g_settings->getBool("strict_protocol_version_checking");
server["name"] = g_settings->get("server_name");
server["description"] = g_settings->get("server_description");
server["version"] = g_version_string;
server["proto_min"] = strict_checking ? LATEST_PROTOCOL_VERSION : SERVER_PROTOCOL_VERSION_MIN;
server["proto_max"] = strict_checking ? LATEST_PROTOCOL_VERSION : SERVER_PROTOCOL_VERSION_MAX;
server["url"] = g_settings->get("server_url");
server["creative"] = g_settings->getBool("creative_mode");
server["damage"] = g_settings->getBool("enable_damage");
server["password"] = g_settings->getBool("disallow_empty_password");
server["pvp"] = g_settings->getBool("enable_pvp");
server["uptime"] = (int) uptime;
server["game_time"] = game_time;
server["clients"] = (int) clients_names.size();
server["clients_max"] = g_settings->getU16("max_users");
server["clients_list"] = Json::Value(Json::arrayValue);
for (const std::string &clients_name : clients_names) {
server["clients_list"].append(clients_name);
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}
if (!gameid.empty())
server["gameid"] = gameid;
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}
if (action == AA_START) {
server["dedicated"] = dedicated;
server["rollback"] = g_settings->getBool("enable_rollback_recording");
server["mapgen"] = mg_name;
server["privs"] = g_settings->get("default_privs");
server["can_see_far_names"] = g_settings->getS16("player_transfer_distance") <= 0;
server["mods"] = Json::Value(Json::arrayValue);
for (const ModSpec &mod : mods) {
server["mods"].append(mod.name);
}
actionstream << "Announcing to " << g_settings->get("serverlist_url") << std::endl;
} else if (action == AA_UPDATE) {
if (lag)
server["lag"] = lag;
}
HTTPFetchRequest fetch_request;
fetch_request.url = g_settings->get("serverlist_url") + std::string("/announce");
fetch_request.method = HTTP_POST;
fetch_request.fields["json"] = fastWriteJson(server);
fetch_request.multipart = true;
httpfetch_async(fetch_request);
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}
#endif
} // namespace ServerList