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                         // Even in case of an error conn must be closed
  94                         sqlite3_close(conn);
  95                         conn = NULL;
  96                         ServerInstance->Logs->Log("m_sqlite3",DEFAULT, "WARNING: Could not open DB with id: " + tag->getString("id"));
  97                 }
  98         }
  99
 100         ~SQLConn()
 101         {
 102                 if (conn)
 103                 {
 104                         sqlite3_interrupt(conn);
 105                         sqlite3_close(conn);
 106                 }
 107         }
 108
 109         void Query(SQLQuery* query, const std::string& q)
 110         {
 111                 SQLite3Result res;
 112                 sqlite3_stmt *stmt;
 113                 int err = sqlite3_prepare_v2(conn, q.c_str(), q.length(), &stmt, NULL);
 114                 if (err != SQLITE_OK)
 115                 {
 116                         SQLerror error(SQL_QSEND_FAIL, sqlite3_errmsg(conn));
 117                         query->OnError(error);
 118                         return;
 119                 }
 120                 int cols = sqlite3_column_count(stmt);
 121                 res.columns.resize(cols);
 122                 for(int i=0; i < cols; i++)
 123                 {
 124                         res.columns[i] = sqlite3_column_name(stmt, i);
 125                 }
 126                 while (1)
 127                 {
 128                         err = sqlite3_step(stmt);
 129                         if (err == SQLITE_ROW)
 130                         {
 131                                 // Add the row
 132                                 res.fieldlists.resize(res.rows + 1);
 133                                 res.fieldlists[res.rows].resize(cols);
 134                                 for(int i=0; i < cols; i++)
 135                                 {
 136                                         const char* txt = (const char*)sqlite3_column_text(stmt, i);
 137                                         if (txt)
 138                                                 res.fieldlists[res.rows][i] = SQLEntry(txt);
 139                                 }
 140                                 res.rows++;
 141                         }
 142                         else if (err == SQLITE_DONE)
 143                         {
 144                                 query->OnResult(res);
 145                                 break;
 146                         }
 147                         else
 148                         {
 149                                 SQLerror error(SQL_QREPLY_FAIL, sqlite3_errmsg(conn));
 150                                 query->OnError(error);
 151                                 break;
 152                         }
 153                 }
 154                 sqlite3_finalize(stmt);
 155         }
 156
 157         virtual void submit(SQLQuery* query, const std::string& q)
 158         {
 159                 Query(query, q);
 160                 delete query;
 161         }
 162
 163         virtual void submit(SQLQuery* query, const std::string& q, const ParamL& p)
 164         {
 165                 std::string res;
 166                 unsigned int param = 0;
 167                 for(std::string::size_type i = 0; i < q.length(); i++)
 168                 {
 169                         if (q[i] != '?')
 170                                 res.push_back(q[i]);
 171                         else
 172                         {
 173                                 if (param < p.size())
 174                                 {
 175                                         char* escaped = sqlite3_mprintf("%q", p[param++].c_str());
 176                                         res.append(escaped);
 177                                         sqlite3_free(escaped);
 178                                 }
 179                         }
 180                 }
 181                 submit(query, res);
 182         }
 183
 184         virtual void submit(SQLQuery* query, const std::string& q, const ParamM& p)
 185         {
 186                 std::string res;
 187                 for(std::string::size_type i = 0; i < q.length(); i++)
 188                 {
 189                         if (q[i] != '$')
 190                                 res.push_back(q[i]);
 191                         else
 192                         {
 193                                 std::string field;
 194                                 i++;
 195                                 while (i < q.length() && isalnum(q[i]))
 196                                         field.push_back(q[i++]);
 197                                 i--;
 198
 199                                 ParamM::const_iterator it = p.find(field);
 200                                 if (it != p.end())
 201                                 {
 202                                         char* escaped = sqlite3_mprintf("%q", it->second.c_str());
 203                                         res.append(escaped);
 204                                         sqlite3_free(escaped);
 205                                 }
 206                         }
 207                 }
 208                 submit(query, res);
 209         }
 210 };
 211
 212 class ModuleSQLite3 : public Module
 213 {
 214  private:
 215         ConnMap conns;
 216
 217  public:
 218         ModuleSQLite3()
 219         {
 220         }
 221
 222         void init()
 223         {
 224                 ReadConf();
 225
 226                 Implementation eventlist[] = { I_OnRehash };
 227                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 228         }
 229
 230         virtual ~ModuleSQLite3()
 231         {
 232                 ClearConns();
 233         }
 234
 235         void ClearConns()
 236         {
 237                 for(ConnMap::iterator i = conns.begin(); i != conns.end(); i++)
 238                 {
 239                         SQLConn* conn = i->second;
 240                         ServerInstance->Modules->DelService(*conn);
 241                         delete conn;
 242                 }
 243                 conns.clear();
 244         }
 245
 246         void ReadConf()
 247         {
 248                 ClearConns();
 249                 ConfigTagList tags = ServerInstance->Config->ConfTags("database");
 250                 for(ConfigIter i = tags.first; i != tags.second; i++)
 251                 {
 252                         if (i->second->getString("module", "sqlite") != "sqlite")
 253                                 continue;
 254                         SQLConn* conn = new SQLConn(this, i->second);
 255                         conns.insert(std::make_pair(i->second->getString("id"), conn));
 256                         ServerInstance->Modules->AddService(*conn);
 257                 }
 258         }
 259
 260         void OnRehash(User* user)
 261         {
 262                 ReadConf();
 263         }
 264
 265         Version GetVersion()
 266         {
 267                 return Version("sqlite3 provider", VF_VENDOR);
 268         }
 269 };
 270
 271 MODULE_INIT(ModuleSQLite3)