src/modules/extra/m_sqlite3.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2007-2009 Dennis Friis <peavey@inspircd.org>
   6  *   Copyright (C) 2007, 2009 Craig Edwards <craigedwards@brainbox.cc>
   7  *   Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
   8  *
   9  * This file is part of InspIRCd.  InspIRCd is free software: you can
  10  * redistribute it and/or modify it under the terms of the GNU General Public
  11  * License as published by the Free Software Foundation, version 2.
  12  *
  13  * This program is distributed in the hope that it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  15  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  16  * details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22
  23 #include "inspircd.h"
  24 #include <sqlite3.h>
  25 #include "sql.h"
  26
  27 #ifdef WINDOWS
  28 # pragma comment(lib, "sqlite3.lib")
  29 #endif
  30
  31 /* $ModDesc: sqlite3 provider */
  32 /* $CompileFlags: pkgconfversion("sqlite3","3.3") pkgconfincludes("sqlite3","/sqlite3.h","") */
  33 /* $LinkerFlags: pkgconflibs("sqlite3","/libsqlite3.so","-lsqlite3") */
  34 /* $NoPedantic */
  35
  36 class SQLConn;
  37 typedef std::map<std::string, SQLConn*> ConnMap;
  38
  39 class SQLite3Result : public SQLResult
  40 {
  41  public:
  42         int currentrow;
  43         int rows;
  44         std::vector<std::string> columns;
  45         std::vector<SQLEntries> fieldlists;
  46
  47         SQLite3Result() : currentrow(0), rows(0)
  48         {
  49         }
  50
  51         ~SQLite3Result()
  52         {
  53         }
  54
  55         virtual int Rows()
  56         {
  57                 return rows;
  58         }
  59
  60         virtual bool GetRow(SQLEntries& result)
  61         {
  62                 if (currentrow < rows)
  63                 {
  64                         result.assign(fieldlists[currentrow].begin(), fieldlists[currentrow].end());
  65                         currentrow++;
  66                         return true;
  67                 }
  68                 else
  69                 {
  70                         result.clear();
  71                         return false;
  72                 }
  73         }
  74
  75         virtual void GetCols(std::vector<std::string>& result)
  76         {
  77                 result.assign(columns.begin(), columns.end());
  78         }
  79 };
  80
  81 class SQLConn : public SQLProvider
  82 {
  83  private:
  84         sqlite3* conn;
  85         reference<ConfigTag> config;
  86
  87  public:
  88         SQLConn(Module* Parent, ConfigTag* tag) : SQLProvider(Parent, "SQL/" + tag->getString("id")), config(tag)
  89         {
  90                 std::string host = tag->getString("hostname");
  91                 if (sqlite3_open_v2(host.c_str(), &conn, SQLITE_OPEN_READWRITE, 0) != SQLITE_OK)
  92                 {
  93                         ServerInstance->Logs->Log("m_sqlite3",DEFAULT, "WARNING: Could not open DB with id: " + tag->getString("id"));
  94                         conn = NULL;
  95                 }
  96         }
  97
  98         ~SQLConn()
  99         {
 100                 sqlite3_interrupt(conn);
 101                 sqlite3_close(conn);
 102         }
 103
 104         void Query(SQLQuery* query, const std::string& q)
 105         {
 106                 SQLite3Result res;
 107                 sqlite3_stmt *stmt;
 108                 int err = sqlite3_prepare_v2(conn, q.c_str(), q.length(), &stmt, NULL);
 109                 if (err != SQLITE_OK)
 110                 {
 111                         SQLerror error(SQL_QSEND_FAIL, sqlite3_errmsg(conn));
 112                         query->OnError(error);
 113                         return;
 114                 }
 115                 int cols = sqlite3_column_count(stmt);
 116                 res.columns.resize(cols);
 117                 for(int i=0; i < cols; i++)
 118                 {
 119                         res.columns[i] = sqlite3_column_name(stmt, i);
 120                 }
 121                 while (1)
 122                 {
 123                         err = sqlite3_step(stmt);
 124                         if (err == SQLITE_ROW)
 125                         {
 126                                 // Add the row
 127                                 res.fieldlists.resize(res.rows + 1);
 128                                 res.fieldlists[res.rows].resize(cols);
 129                                 for(int i=0; i < cols; i++)
 130                                 {
 131                                         const char* txt = (const char*)sqlite3_column_text(stmt, i);
 132                                         if (txt)
 133                                                 res.fieldlists[res.rows][i] = SQLEntry(txt);
 134                                 }
 135                                 res.rows++;
 136                         }
 137                         else if (err == SQLITE_DONE)
 138                         {
 139                                 query->OnResult(res);
 140                                 break;
 141                         }
 142                         else
 143                         {
 144                                 SQLerror error(SQL_QREPLY_FAIL, sqlite3_errmsg(conn));
 145                                 query->OnError(error);
 146                                 break;
 147                         }
 148                 }
 149                 sqlite3_finalize(stmt);
 150         }
 151
 152         virtual void submit(SQLQuery* query, const std::string& q)
 153         {
 154                 Query(query, q);
 155                 delete query;
 156         }
 157
 158         virtual void submit(SQLQuery* query, const std::string& q, const ParamL& p)
 159         {
 160                 std::string res;
 161                 unsigned int param = 0;
 162                 for(std::string::size_type i = 0; i < q.length(); i++)
 163                 {
 164                         if (q[i] != '?')
 165                                 res.push_back(q[i]);
 166                         else
 167                         {
 168                                 if (param < p.size())
 169                                 {
 170                                         char* escaped = sqlite3_mprintf("%q", p[param++].c_str());
 171                                         res.append(escaped);
 172                                         sqlite3_free(escaped);
 173                                 }
 174                         }
 175                 }
 176                 submit(query, res);
 177         }
 178
 179         virtual void submit(SQLQuery* query, const std::string& q, const ParamM& p)
 180         {
 181                 std::string res;
 182                 for(std::string::size_type i = 0; i < q.length(); i++)
 183                 {
 184                         if (q[i] != '$')
 185                                 res.push_back(q[i]);
 186                         else
 187                         {
 188                                 std::string field;
 189                                 i++;
 190                                 while (i < q.length() && isalnum(q[i]))
 191                                         field.push_back(q[i++]);
 192                                 i--;
 193
 194                                 ParamM::const_iterator it = p.find(field);
 195                                 if (it != p.end())
 196                                 {
 197                                         char* escaped = sqlite3_mprintf("%q", it->second.c_str());
 198                                         res.append(escaped);
 199                                         sqlite3_free(escaped);
 200                                 }
 201                         }
 202                 }
 203                 submit(query, res);
 204         }
 205 };
 206
 207 class ModuleSQLite3 : public Module
 208 {
 209  private:
 210         ConnMap conns;
 211
 212  public:
 213         ModuleSQLite3()
 214         {
 215         }
 216
 217         void init()
 218         {
 219                 ReadConf();
 220
 221                 Implementation eventlist[] = { I_OnRehash };
 222                 ServerInstance->Modules->Attach(eventlist, this, 1);
 223         }
 224
 225         virtual ~ModuleSQLite3()
 226         {
 227                 ClearConns();
 228         }
 229
 230         void ClearConns()
 231         {
 232                 for(ConnMap::iterator i = conns.begin(); i != conns.end(); i++)
 233                 {
 234                         SQLConn* conn = i->second;
 235                         ServerInstance->Modules->DelService(*conn);
 236                         delete conn;
 237                 }
 238                 conns.clear();
 239         }
 240
 241         void ReadConf()
 242         {
 243                 ClearConns();
 244                 ConfigTagList tags = ServerInstance->Config->ConfTags("database");
 245                 for(ConfigIter i = tags.first; i != tags.second; i++)
 246                 {
 247                         if (i->second->getString("module", "sqlite") != "sqlite")
 248                                 continue;
 249                         SQLConn* conn = new SQLConn(this, i->second);
 250                         conns.insert(std::make_pair(i->second->getString("id"), conn));
 251                         ServerInstance->Modules->AddService(*conn);
 252                 }
 253         }
 254
 255         void OnRehash(User* user)
 256         {
 257                 ReadConf();
 258         }
 259
 260         Version GetVersion()
 261         {
 262                 return Version("sqlite3 provider", VF_VENDOR);
 263         }
 264 };
 265
 266 MODULE_INIT(ModuleSQLite3)