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 rel_path = std::string("client") + DIR_DELIM
  42                 + "serverlist" + DIR_DELIM
  43                 + serverlist_file;
  44         std::string path = porting::path_share + DIR_DELIM + rel_path;
  45         return path;
  46 }
  47
  48 std::vector<ServerListSpec> getLocal()
  49 {
  50         std::string path = ServerList::getFilePath();
  51         std::string liststring;
  52         if(fs::PathExists(path))
  53         {
  54                 std::ifstream istream(path.c_str(), std::ios::binary);
  55                 if(istream.is_open())
  56                 {
  57                         std::ostringstream ostream;
  58                         ostream << istream.rdbuf();
  59                         liststring = ostream.str();
  60                         istream.close();
  61                 }
  62         }
  63
  64         return ServerList::deSerialize(liststring);
  65 }
  66
  67
  68 #if USE_CURL
  69
  70 static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp)
  71 {
  72     ((std::string*)userp)->append((char*)contents, size * nmemb);
  73     return size * nmemb;
  74 }
  75
  76
  77 std::vector<ServerListSpec> getOnline()
  78 {
  79         std::string liststring;
  80         CURL *curl;
  81
  82         curl = curl_easy_init();
  83         if (curl)
  84         {
  85                 CURLcode res;
  86
  87                 curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
  88                 curl_easy_setopt(curl, CURLOPT_URL, (g_settings->get("serverlist_url")+"/list").c_str());
  89                 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, ServerList::WriteCallback);
  90                 curl_easy_setopt(curl, CURLOPT_WRITEDATA, &liststring);
  91
  92                 res = curl_easy_perform(curl);
  93                 if (res != CURLE_OK)
  94                         errorstream<<"Serverlist at url "<<g_settings->get("serverlist_url")<<" not found (internet connection?)"<<std::endl;
  95                 curl_easy_cleanup(curl);
  96         }
  97         return ServerList::deSerializeJson(liststring);
  98 }
  99
 100 #endif
 101
 102 /*
 103         Delete a server fromt he local favorites list
 104 */
 105 bool deleteEntry (ServerListSpec server)
 106 {
 107         std::vector<ServerListSpec> serverlist = ServerList::getLocal();
 108         for(unsigned i = 0; i < serverlist.size(); i++)
 109         {
 110                 if  (serverlist[i]["address"] == server["address"]
 111                 &&   serverlist[i]["port"]    == server["port"])
 112                 {
 113                         serverlist.erase(serverlist.begin() + i);
 114                 }
 115         }
 116
 117         std::string path = ServerList::getFilePath();
 118         std::ofstream stream (path.c_str());
 119         if (stream.is_open())
 120         {
 121                 stream<<ServerList::serialize(serverlist);
 122                 return true;
 123         }
 124         return false;
 125 }
 126
 127 /*
 128         Insert a server to the local favorites list
 129 */
 130 bool insert (ServerListSpec server)
 131 {
 132         // Remove duplicates
 133         ServerList::deleteEntry(server);
 134
 135         std::vector<ServerListSpec> serverlist = ServerList::getLocal();
 136
 137         // Insert new server at the top of the list
 138         serverlist.insert(serverlist.begin(), server);
 139
 140         std::string path = ServerList::getFilePath();
 141         std::ofstream stream (path.c_str());
 142         if (stream.is_open())
 143         {
 144                 stream<<ServerList::serialize(serverlist);
 145         }
 146
 147         return false;
 148 }
 149
 150 std::vector<ServerListSpec> deSerialize(std::string liststring)
 151 {
 152         std::vector<ServerListSpec> serverlist;
 153         std::istringstream stream(liststring);
 154         std::string line, tmp;
 155         while (std::getline(stream, line))
 156         {
 157                 std::transform(line.begin(), line.end(),line.begin(), ::toupper);
 158                 if (line == "[SERVER]")
 159                 {
 160                         ServerListSpec thisserver;
 161                         std::getline(stream, tmp);
 162                         thisserver["name"] = tmp;
 163                         std::getline(stream, tmp);
 164                         thisserver["address"] = tmp;
 165                         std::getline(stream, tmp);
 166                         thisserver["port"] = tmp;
 167                         std::getline(stream, tmp);
 168                         thisserver["description"] = tmp;
 169                         serverlist.push_back(thisserver);
 170                 }
 171         }
 172         return serverlist;
 173 }
 174
 175 std::string serialize(std::vector<ServerListSpec> serverlist)
 176 {
 177         std::string liststring;
 178         for(std::vector<ServerListSpec>::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 179         {
 180                 liststring += "[server]\n";
 181                 liststring += (*i)["name"].asString() + "\n";
 182                 liststring += (*i)["address"].asString() + "\n";
 183                 liststring += (*i)["port"].asString() + "\n";
 184                 liststring += (*i)["description"].asString() + "\n";
 185                 liststring += "\n";
 186         }
 187         return liststring;
 188 }
 189
 190 std::vector<ServerListSpec> deSerializeJson(std::string liststring)
 191 {
 192         std::vector<ServerListSpec> serverlist;
 193         Json::Value root;
 194         Json::Reader reader;
 195         std::istringstream stream(liststring);
 196         if (!liststring.size()) {
 197                 return serverlist;
 198         }
 199         if (!reader.parse( stream, root ) )
 200         {
 201                 errorstream  << "Failed to parse server list " << reader.getFormattedErrorMessages();
 202                 return serverlist;
 203         }
 204         if (root["list"].isArray())
 205             for (unsigned int i = 0; i < root["list"].size(); i++)
 206         {
 207                 if (root["list"][i].isObject()) {
 208                         serverlist.push_back(root["list"][i]);
 209                 }
 210         }
 211         return serverlist;
 212 }
 213
 214 std::string serializeJson(std::vector<ServerListSpec> serverlist)
 215 {
 216         Json::Value root;
 217         Json::Value list(Json::arrayValue);
 218         for(std::vector<ServerListSpec>::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 219         {
 220                 list.append(*i);
 221         }
 222         root["list"] = list;
 223         Json::StyledWriter writer;
 224         return writer.write( root );
 225 }
 226
 227
 228 #if USE_CURL
 229 static size_t ServerAnnounceCallback(void *contents, size_t size, size_t nmemb, void *userp)
 230 {
 231     return 0;
 232     //((std::string*)userp)->append((char*)contents, size * nmemb);
 233     //return size * nmemb;
 234 }
 235 void sendAnnounce(std::string action, u16 clients) {
 236         Json::Value server;
 237         if (action.size())
 238                 server["action"]        = action;
 239         server["port"] = g_settings->get("port");
 240         if (action != "del") {
 241                 server["name"]          = g_settings->get("server_name");
 242                 server["description"]   = g_settings->get("server_description");
 243                 server["address"]       = g_settings->get("server_address");
 244                 server["version"]       = VERSION_STRING;
 245                 server["url"]           = g_settings->get("server_url");
 246                 server["creative"]      = g_settings->get("creative_mode");
 247                 server["damage"]        = g_settings->get("enable_damage");
 248                 server["dedicated"]     = g_settings->get("server_dedicated");
 249                 server["password"]      = g_settings->getBool("disallow_empty_password");
 250                 server["pvp"]           = g_settings->getBool("enable_pvp");
 251                 server["clients"]       = clients;
 252                 server["clients_max"]   = g_settings->get("max_users");
 253         }
 254         if(server["action"] == "start")
 255                 actionstream << "announcing to " << g_settings->get("serverlist_url") << std::endl;
 256         Json::StyledWriter writer;
 257         CURL *curl;
 258         curl = curl_easy_init();
 259         if (curl)
 260         {
 261                 CURLcode res;
 262                 curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
 263                 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());
 264                 //curl_easy_setopt(curl, CURLOPT_USERAGENT, "minetest");
 265                 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, ServerList::ServerAnnounceCallback);
 266                 //curl_easy_setopt(curl, CURLOPT_WRITEDATA, &liststring);
 267                 curl_easy_setopt(curl, CURLOPT_TIMEOUT, 1);
 268                 curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 1);
 269                 res = curl_easy_perform(curl);
 270                 //if (res != CURLE_OK)
 271                 //      errorstream<<"Serverlist at url "<<g_settings->get("serverlist_url")<<" not found (internet connection?)"<<std::endl;
 272                 curl_easy_cleanup(curl);
 273         }
 274
 275 }
 276 #endif
 277
 278 } //namespace ServerList