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 _WIN32
  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                 if (conn)
 101                 {
 102                         sqlite3_interrupt(conn);
 103                         sqlite3_close(conn);
 104                 }
 105         }
 106
 107         void Query(SQLQuery* query, const std::string& q)
 108         {
 109                 SQLite3Result res;
 110                 sqlite3_stmt *stmt;
 111                 int err = sqlite3_prepare_v2(conn, q.c_str(), q.length(), &stmt, NULL);
 112                 if (err != SQLITE_OK)
 113                 {
 114                         SQLerror error(SQL_QSEND_FAIL, sqlite3_errmsg(conn));
 115                         query->OnError(error);
 116                         return;
 117                 }
 118                 int cols = sqlite3_column_count(stmt);
 119                 res.columns.resize(cols);
 120                 for(int i=0; i < cols; i++)
 121                 {
 122                         res.columns[i] = sqlite3_column_name(stmt, i);
 123                 }
 124                 while (1)
 125                 {
 126                         err = sqlite3_step(stmt);
 127                         if (err == SQLITE_ROW)
 128                         {
 129                                 // Add the row
 130                                 res.fieldlists.resize(res.rows + 1);
 131                                 res.fieldlists[res.rows].resize(cols);
 132                                 for(int i=0; i < cols; i++)
 133                                 {
 134                                         const char* txt = (const char*)sqlite3_column_text(stmt, i);
 135                                         if (txt)
 136                                                 res.fieldlists[res.rows][i] = SQLEntry(txt);
 137                                 }
 138                                 res.rows++;
 139                         }
 140                         else if (err == SQLITE_DONE)
 141                         {
 142                                 query->OnResult(res);
 143                                 break;
 144                         }
 145                         else
 146                         {
 147                                 SQLerror error(SQL_QREPLY_FAIL, sqlite3_errmsg(conn));
 148                                 query->OnError(error);
 149                                 break;
 150                         }
 151                 }
 152                 sqlite3_finalize(stmt);
 153         }
 154
 155         virtual void submit(SQLQuery* query, const std::string& q)
 156         {
 157                 Query(query, q);
 158                 delete query;
 159         }
 160
 161         virtual void submit(SQLQuery* query, const std::string& q, const ParamL& p)
 162         {
 163                 std::string res;
 164                 unsigned int param = 0;
 165                 for(std::string::size_type i = 0; i < q.length(); i++)
 166                 {
 167                         if (q[i] != '?')
 168                                 res.push_back(q[i]);
 169                         else
 170                         {
 171                                 if (param < p.size())
 172                                 {
 173                                         char* escaped = sqlite3_mprintf("%q", p[param++].c_str());
 174                                         res.append(escaped);
 175                                         sqlite3_free(escaped);
 176                                 }
 177                         }
 178                 }
 179                 submit(query, res);
 180         }
 181
 182         virtual void submit(SQLQuery* query, const std::string& q, const ParamM& p)
 183         {
 184                 std::string res;
 185                 for(std::string::size_type i = 0; i < q.length(); i++)
 186                 {
 187                         if (q[i] != '$')
 188                                 res.push_back(q[i]);
 189                         else
 190                         {
 191                                 std::string field;
 192                                 i++;
 193                                 while (i < q.length() && isalnum(q[i]))
 194                                         field.push_back(q[i++]);
 195                                 i--;
 196
 197                                 ParamM::const_iterator it = p.find(field);
 198                                 if (it != p.end())
 199                                 {
 200                                         char* escaped = sqlite3_mprintf("%q", it->second.c_str());
 201                                         res.append(escaped);
 202                                         sqlite3_free(escaped);
 203                                 }
 204                         }
 205                 }
 206                 submit(query, res);
 207         }
 208 };
 209
 210 class ModuleSQLite3 : public Module
 211 {
 212  private:
 213         ConnMap conns;
 214
 215  public:
 216         ModuleSQLite3()
 217         {
 218         }
 219
 220         void init()
 221         {
 222                 ReadConf();
 223
 224                 Implementation eventlist[] = { I_OnRehash };
 225                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 226         }
 227
 228         virtual ~ModuleSQLite3()
 229         {
 230                 ClearConns();
 231         }
 232
 233         void ClearConns()
 234         {
 235                 for(ConnMap::iterator i = conns.begin(); i != conns.end(); i++)
 236                 {
 237                         SQLConn* conn = i->second;
 238                         ServerInstance->Modules->DelService(*conn);
 239                         delete conn;
 240                 }
 241                 conns.clear();
 242         }
 243
 244         void ReadConf()
 245         {
 246                 ClearConns();
 247                 ConfigTagList tags = ServerInstance->Config->ConfTags("database");
 248                 for(ConfigIter i = tags.first; i != tags.second; i++)
 249                 {
 250                         if (i->second->getString("module", "sqlite") != "sqlite")
 251                                 continue;
 252                         SQLConn* conn = new SQLConn(this, i->second);
 253                         conns.insert(std::make_pair(i->second->getString("id"), conn));
 254                         ServerInstance->Modules->AddService(*conn);
 255                 }
 256         }
 257
 258         void OnRehash(User* user)
 259         {
 260                 ReadConf();
 261         }
 262
 263         Version GetVersion()
 264         {
 265                 return Version("sqlite3 provider", VF_VENDOR);
 266         }
 267 };
 268
 269 MODULE_INIT(ModuleSQLite3)