src/serverlist.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include <iostream>
  21 #include <sstream>
  22 #include <algorithm>
  23
  24 #include "main.h" // for g_settings
  25 #include "settings.h"
  26 #include "serverlist.h"
  27 #include "filesys.h"
  28 #include "porting.h"
  29 #include "log.h"
  30 #include "json/json.h"
  31 #if USE_CURL
  32 #include <curl/curl.h>
  33 #endif
  34
  35 namespace ServerList
  36 {
  37 std::string getFilePath()
  38 {
  39         std::string serverlist_file = g_settings->get("serverlist_file");
  40
  41         std::string dir_path = std::string("client") + DIR_DELIM
  42                 + "serverlist" + DIR_DELIM;
  43         fs::CreateDir(porting::path_user + DIR_DELIM + "client");
  44         fs::CreateDir(porting::path_user + DIR_DELIM + dir_path);
  45         std::string rel_path = dir_path + serverlist_file;
  46         std::string path = porting::path_user + DIR_DELIM + rel_path;
  47         return path;
  48 }
  49
  50 std::vector<ServerListSpec> getLocal()
  51 {
  52         std::string path = ServerList::getFilePath();
  53         std::string liststring;
  54         if(fs::PathExists(path))
  55         {
  56                 std::ifstream istream(path.c_str(), std::ios::binary);
  57                 if(istream.is_open())
  58                 {
  59                         std::ostringstream ostream;
  60                         ostream << istream.rdbuf();
  61                         liststring = ostream.str();
  62                         istream.close();
  63                 }
  64         }
  65
  66         return ServerList::deSerialize(liststring);
  67 }
  68
  69
  70 #if USE_CURL
  71
  72 static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp)
  73 {
  74     ((std::string*)userp)->append((char*)contents, size * nmemb);
  75     return size * nmemb;
  76 }
  77
  78
  79 std::vector<ServerListSpec> getOnline()
  80 {
  81         std::string liststring;
  82         CURL *curl;
  83
  84         curl = curl_easy_init();
  85         if (curl)
  86         {
  87                 CURLcode res;
  88
  89                 curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
  90                 curl_easy_setopt(curl, CURLOPT_URL, (g_settings->get("serverlist_url")+"/list").c_str());
  91                 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, ServerList::WriteCallback);
  92                 curl_easy_setopt(curl, CURLOPT_WRITEDATA, &liststring);
  93
  94                 res = curl_easy_perform(curl);
  95                 if (res != CURLE_OK)
  96                         errorstream<<"Serverlist at url "<<g_settings->get("serverlist_url")<<" not found (internet connection?)"<<std::endl;
  97                 curl_easy_cleanup(curl);
  98         }
  99         return ServerList::deSerializeJson(liststring);
 100 }
 101
 102 #endif
 103
 104 /*
 105         Delete a server fromt he local favorites list
 106 */
 107 bool deleteEntry (ServerListSpec server)
 108 {
 109         std::vector<ServerListSpec> serverlist = ServerList::getLocal();
 110         for(unsigned i = 0; i < serverlist.size(); i++)
 111         {
 112                 if  (serverlist[i]["address"] == server["address"]
 113                 &&   serverlist[i]["port"]    == server["port"])
 114                 {
 115                         serverlist.erase(serverlist.begin() + i);
 116                 }
 117         }
 118
 119         std::string path = ServerList::getFilePath();
 120         std::ofstream stream (path.c_str());
 121         if (stream.is_open())
 122         {
 123                 stream<<ServerList::serialize(serverlist);
 124                 return true;
 125         }
 126         return false;
 127 }
 128
 129 /*
 130         Insert a server to the local favorites list
 131 */
 132 bool insert (ServerListSpec server)
 133 {
 134         // Remove duplicates
 135         ServerList::deleteEntry(server);
 136
 137         std::vector<ServerListSpec> serverlist = ServerList::getLocal();
 138
 139         // Insert new server at the top of the list
 140         serverlist.insert(serverlist.begin(), server);
 141
 142         std::string path = ServerList::getFilePath();
 143         std::ofstream stream (path.c_str());
 144         if (stream.is_open())
 145         {
 146                 stream<<ServerList::serialize(serverlist);
 147         }
 148
 149         return false;
 150 }
 151
 152 std::vector<ServerListSpec> deSerialize(std::string liststring)
 153 {
 154         std::vector<ServerListSpec> serverlist;
 155         std::istringstream stream(liststring);
 156         std::string line, tmp;
 157         while (std::getline(stream, line))
 158         {
 159                 std::transform(line.begin(), line.end(),line.begin(), ::toupper);
 160                 if (line == "[SERVER]")
 161                 {
 162                         ServerListSpec thisserver;
 163                         std::getline(stream, tmp);
 164                         thisserver["name"] = tmp;
 165                         std::getline(stream, tmp);
 166                         thisserver["address"] = tmp;
 167                         std::getline(stream, tmp);
 168                         thisserver["port"] = tmp;
 169                         std::getline(stream, tmp);
 170                         thisserver["description"] = tmp;
 171                         serverlist.push_back(thisserver);
 172                 }
 173         }
 174         return serverlist;
 175 }
 176
 177 std::string serialize(std::vector<ServerListSpec> serverlist)
 178 {
 179         std::string liststring;
 180         for(std::vector<ServerListSpec>::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 181         {
 182                 liststring += "[server]\n";
 183                 liststring += (*i)["name"].asString() + "\n";
 184                 liststring += (*i)["address"].asString() + "\n";
 185                 liststring += (*i)["port"].asString() + "\n";
 186                 liststring += (*i)["description"].asString() + "\n";
 187                 liststring += "\n";
 188         }
 189         return liststring;
 190 }
 191
 192 std::vector<ServerListSpec> deSerializeJson(std::string liststring)
 193 {
 194         std::vector<ServerListSpec> serverlist;
 195         Json::Value root;
 196         Json::Reader reader;
 197         std::istringstream stream(liststring);
 198         if (!liststring.size()) {
 199                 return serverlist;
 200         }
 201         if (!reader.parse( stream, root ) )
 202         {
 203                 errorstream  << "Failed to parse server list " << reader.getFormattedErrorMessages();
 204                 return serverlist;
 205         }
 206         if (root["list"].isArray())
 207             for (unsigned int i = 0; i < root["list"].size(); i++)
 208         {
 209                 if (root["list"][i].isObject()) {
 210                         serverlist.push_back(root["list"][i]);
 211                 }
 212         }
 213         return serverlist;
 214 }
 215
 216 std::string serializeJson(std::vector<ServerListSpec> serverlist)
 217 {
 218         Json::Value root;
 219         Json::Value list(Json::arrayValue);
 220         for(std::vector<ServerListSpec>::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 221         {
 222                 list.append(*i);
 223         }
 224         root["list"] = list;
 225         Json::StyledWriter writer;
 226         return writer.write( root );
 227 }
 228
 229
 230 #if USE_CURL
 231 static size_t ServerAnnounceCallback(void *contents, size_t size, size_t nmemb, void *userp)
 232 {
 233     return 0;
 234     //((std::string*)userp)->append((char*)contents, size * nmemb);
 235     //return size * nmemb;
 236 }
 237 void sendAnnounce(std::string action, u16 clients, double uptime, std::string gameid) {
 238         Json::Value server;
 239         if (action.size())
 240                 server["action"]        = action;
 241         server["port"] = g_settings->get("port");
 242         if (action != "del") {
 243                 server["name"]          = g_settings->get("server_name");
 244                 server["description"]   = g_settings->get("server_description");
 245                 server["address"]       = g_settings->get("server_address");
 246                 server["version"]       = VERSION_STRING;
 247                 server["url"]           = g_settings->get("server_url");
 248                 server["creative"]      = g_settings->get("creative_mode");
 249                 server["damage"]        = g_settings->get("enable_damage");
 250                 server["dedicated"]     = g_settings->get("server_dedicated");
 251                 server["password"]      = g_settings->getBool("disallow_empty_password");
 252                 server["pvp"]           = g_settings->getBool("enable_pvp");
 253                 server["clients"]       = clients;
 254                 server["clients_max"]   = g_settings->get("max_users");
 255                 if (uptime >=1) server["uptime"] = (int)uptime;
 256                 if (gameid!="") server["gameid"] = gameid;
 257
 258         }
 259         if(server["action"] == "start")
 260                 actionstream << "announcing to " << g_settings->get("serverlist_url") << std::endl;
 261         Json::StyledWriter writer;
 262         CURL *curl;
 263         curl = curl_easy_init();
 264         if (curl)
 265         {
 266                 CURLcode res;
 267                 curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
 268                 curl_easy_setopt(curl, CURLOPT_URL, (g_settings->get("serverlist_url")+std::string("/announce?json=")+curl_easy_escape(curl, writer.write( server ).c_str(), 0)).c_str());
 269                 //curl_easy_setopt(curl, CURLOPT_USERAGENT, "minetest");
 270                 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, ServerList::ServerAnnounceCallback);
 271                 //curl_easy_setopt(curl, CURLOPT_WRITEDATA, &liststring);
 272                 curl_easy_setopt(curl, CURLOPT_TIMEOUT, 1);
 273                 curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 1);
 274                 res = curl_easy_perform(curl);
 275                 //if (res != CURLE_OK)
 276                 //      errorstream<<"Serverlist at url "<<g_settings->get("serverlist_url")<<" not found (internet connection?)"<<std::endl;
 277                 curl_easy_cleanup(curl);
 278         }
 279
 280 }
 281 #endif
 282
 283 } //namespace ServerList