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 "modules/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         int Rows()
  52         {
  53                 return rows;
  54         }
  55
  56         bool GetRow(SQLEntries& result)
  57         {
  58                 if (currentrow < rows)
  59                 {
  60                         result.assign(fieldlists[currentrow].begin(), fieldlists[currentrow].end());
  61                         currentrow++;
  62                         return true;
  63                 }
  64                 else
  65                 {
  66                         result.clear();
  67                         return false;
  68                 }
  69         }
  70
  71         void GetCols(std::vector<std::string>& result)
  72         {
  73                 result.assign(columns.begin(), columns.end());
  74         }
  75 };
  76
  77 class SQLConn : public SQLProvider
  78 {
  79         sqlite3* conn;
  80         reference<ConfigTag> config;
  81
  82  public:
  83         SQLConn(Module* Parent, ConfigTag* tag) : SQLProvider(Parent, "SQL/" + tag->getString("id")), config(tag)
  84         {
  85                 std::string host = tag->getString("hostname");
  86                 if (sqlite3_open_v2(host.c_str(), &conn, SQLITE_OPEN_READWRITE, 0) != SQLITE_OK)
  87                 {
  88                         ServerInstance->Logs->Log("m_sqlite3", LOG_DEFAULT, "WARNING: Could not open DB with id: " + tag->getString("id"));
  89                         conn = NULL;
  90                 }
  91         }
  92
  93         ~SQLConn()
  94         {
  95                 sqlite3_interrupt(conn);
  96                 sqlite3_close(conn);
  97         }
  98
  99         void Query(SQLQuery* query, const std::string& q)
 100         {
 101                 SQLite3Result res;
 102                 sqlite3_stmt *stmt;
 103                 int err = sqlite3_prepare_v2(conn, q.c_str(), q.length(), &stmt, NULL);
 104                 if (err != SQLITE_OK)
 105                 {
 106                         SQLerror error(SQL_QSEND_FAIL, sqlite3_errmsg(conn));
 107                         query->OnError(error);
 108                         return;
 109                 }
 110                 int cols = sqlite3_column_count(stmt);
 111                 res.columns.resize(cols);
 112                 for(int i=0; i < cols; i++)
 113                 {
 114                         res.columns[i] = sqlite3_column_name(stmt, i);
 115                 }
 116                 while (1)
 117                 {
 118                         err = sqlite3_step(stmt);
 119                         if (err == SQLITE_ROW)
 120                         {
 121                                 // Add the row
 122                                 res.fieldlists.resize(res.rows + 1);
 123                                 res.fieldlists[res.rows].resize(cols);
 124                                 for(int i=0; i < cols; i++)
 125                                 {
 126                                         const char* txt = (const char*)sqlite3_column_text(stmt, i);
 127                                         if (txt)
 128                                                 res.fieldlists[res.rows][i] = SQLEntry(txt);
 129                                 }
 130                                 res.rows++;
 131                         }
 132                         else if (err == SQLITE_DONE)
 133                         {
 134                                 query->OnResult(res);
 135                                 break;
 136                         }
 137                         else
 138                         {
 139                                 SQLerror error(SQL_QREPLY_FAIL, sqlite3_errmsg(conn));
 140                                 query->OnError(error);
 141                                 break;
 142                         }
 143                 }
 144                 sqlite3_finalize(stmt);
 145         }
 146
 147         void submit(SQLQuery* query, const std::string& q)
 148         {
 149                 Query(query, q);
 150                 delete query;
 151         }
 152
 153         void submit(SQLQuery* query, const std::string& q, const ParamL& p)
 154         {
 155                 std::string res;
 156                 unsigned int param = 0;
 157                 for(std::string::size_type i = 0; i < q.length(); i++)
 158                 {
 159                         if (q[i] != '?')
 160                                 res.push_back(q[i]);
 161                         else
 162                         {
 163                                 if (param < p.size())
 164                                 {
 165                                         char* escaped = sqlite3_mprintf("%q", p[param++].c_str());
 166                                         res.append(escaped);
 167                                         sqlite3_free(escaped);
 168                                 }
 169                         }
 170                 }
 171                 submit(query, res);
 172         }
 173
 174         void submit(SQLQuery* query, const std::string& q, const ParamM& p)
 175         {
 176                 std::string res;
 177                 for(std::string::size_type i = 0; i < q.length(); i++)
 178                 {
 179                         if (q[i] != '$')
 180                                 res.push_back(q[i]);
 181                         else
 182                         {
 183                                 std::string field;
 184                                 i++;
 185                                 while (i < q.length() && isalnum(q[i]))
 186                                         field.push_back(q[i++]);
 187                                 i--;
 188
 189                                 ParamM::const_iterator it = p.find(field);
 190                                 if (it != p.end())
 191                                 {
 192                                         char* escaped = sqlite3_mprintf("%q", it->second.c_str());
 193                                         res.append(escaped);
 194                                         sqlite3_free(escaped);
 195                                 }
 196                         }
 197                 }
 198                 submit(query, res);
 199         }
 200 };
 201
 202 class ModuleSQLite3 : public Module
 203 {
 204         ConnMap conns;
 205
 206  public:
 207         void init() CXX11_OVERRIDE
 208         {
 209                 ReadConf();
 210
 211                 Implementation eventlist[] = { I_OnRehash };
 212                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 213         }
 214
 215         ~ModuleSQLite3()
 216         {
 217                 ClearConns();
 218         }
 219
 220         void ClearConns()
 221         {
 222                 for(ConnMap::iterator i = conns.begin(); i != conns.end(); i++)
 223                 {
 224                         SQLConn* conn = i->second;
 225                         ServerInstance->Modules->DelService(*conn);
 226                         delete conn;
 227                 }
 228                 conns.clear();
 229         }
 230
 231         void ReadConf()
 232         {
 233                 ClearConns();
 234                 ConfigTagList tags = ServerInstance->Config->ConfTags("database");
 235                 for(ConfigIter i = tags.first; i != tags.second; i++)
 236                 {
 237                         if (i->second->getString("module", "sqlite") != "sqlite")
 238                                 continue;
 239                         SQLConn* conn = new SQLConn(this, i->second);
 240                         conns.insert(std::make_pair(i->second->getString("id"), conn));
 241                         ServerInstance->Modules->AddService(*conn);
 242                 }
 243         }
 244
 245         void OnRehash(User* user) CXX11_OVERRIDE
 246         {
 247                 ReadConf();
 248         }
 249
 250         Version GetVersion() CXX11_OVERRIDE
 251         {
 252                 return Version("sqlite3 provider", VF_VENDOR);
 253         }
 254 };
 255
 256 MODULE_INIT(ModuleSQLite3)