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 "modules/sql.h"
  25
  26 // Fix warnings about the use of `long long` on C++03.
  27 #if defined __clang__
  28 # pragma clang diagnostic ignored "-Wc++11-long-long"
  29 #elif defined __GNUC__
  30 # pragma GCC diagnostic ignored "-Wlong-long"
  31 #endif
  32
  33 #include <sqlite3.h>
  34
  35 #ifdef _WIN32
  36 # pragma comment(lib, "sqlite3.lib")
  37 #endif
  38
  39 /* $CompileFlags: pkgconfversion("sqlite3","3.3") pkgconfincludes("sqlite3","/sqlite3.h","") */
  40 /* $LinkerFlags: pkgconflibs("sqlite3","/libsqlite3.so","-lsqlite3") */
  41
  42 class SQLConn;
  43 typedef insp::flat_map<std::string, SQLConn*> ConnMap;
  44
  45 class SQLite3Result : public SQLResult
  46 {
  47  public:
  48         int currentrow;
  49         int rows;
  50         std::vector<std::string> columns;
  51         std::vector<SQLEntries> fieldlists;
  52
  53         SQLite3Result() : currentrow(0), rows(0)
  54         {
  55         }
  56
  57         int Rows()
  58         {
  59                 return rows;
  60         }
  61
  62         bool GetRow(SQLEntries& result)
  63         {
  64                 if (currentrow < rows)
  65                 {
  66                         result.assign(fieldlists[currentrow].begin(), fieldlists[currentrow].end());
  67                         currentrow++;
  68                         return true;
  69                 }
  70                 else
  71                 {
  72                         result.clear();
  73                         return false;
  74                 }
  75         }
  76
  77         void GetCols(std::vector<std::string>& result)
  78         {
  79                 result.assign(columns.begin(), columns.end());
  80         }
  81 };
  82
  83 class SQLConn : public SQLProvider
  84 {
  85         sqlite3* conn;
  86         reference<ConfigTag> config;
  87
  88  public:
  89         SQLConn(Module* Parent, ConfigTag* tag) : SQLProvider(Parent, "SQL/" + tag->getString("id")), config(tag)
  90         {
  91                 std::string host = tag->getString("hostname");
  92                 if (sqlite3_open_v2(host.c_str(), &conn, SQLITE_OPEN_READWRITE, 0) != SQLITE_OK)
  93                 {
  94                         // Even in case of an error conn must be closed
  95                         sqlite3_close(conn);
  96                         conn = NULL;
  97                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: Could not open DB with id: " + tag->getString("id"));
  98                 }
  99         }
 100
 101         ~SQLConn()
 102         {
 103                 if (conn)
 104                 {
 105                         sqlite3_interrupt(conn);
 106                         sqlite3_close(conn);
 107                 }
 108         }
 109
 110         void Query(SQLQuery* query, const std::string& q)
 111         {
 112                 SQLite3Result res;
 113                 sqlite3_stmt *stmt;
 114                 int err = sqlite3_prepare_v2(conn, q.c_str(), q.length(), &stmt, NULL);
 115                 if (err != SQLITE_OK)
 116                 {
 117                         SQLerror error(SQL_QSEND_FAIL, sqlite3_errmsg(conn));
 118                         query->OnError(error);
 119                         return;
 120                 }
 121                 int cols = sqlite3_column_count(stmt);
 122                 res.columns.resize(cols);
 123                 for(int i=0; i < cols; i++)
 124                 {
 125                         res.columns[i] = sqlite3_column_name(stmt, i);
 126                 }
 127                 while (1)
 128                 {
 129                         err = sqlite3_step(stmt);
 130                         if (err == SQLITE_ROW)
 131                         {
 132                                 // Add the row
 133                                 res.fieldlists.resize(res.rows + 1);
 134                                 res.fieldlists[res.rows].resize(cols);
 135                                 for(int i=0; i < cols; i++)
 136                                 {
 137                                         const char* txt = (const char*)sqlite3_column_text(stmt, i);
 138                                         if (txt)
 139                                                 res.fieldlists[res.rows][i] = SQLEntry(txt);
 140                                 }
 141                                 res.rows++;
 142                         }
 143                         else if (err == SQLITE_DONE)
 144                         {
 145                                 query->OnResult(res);
 146                                 break;
 147                         }
 148                         else
 149                         {
 150                                 SQLerror error(SQL_QREPLY_FAIL, sqlite3_errmsg(conn));
 151                                 query->OnError(error);
 152                                 break;
 153                         }
 154                 }
 155                 sqlite3_finalize(stmt);
 156         }
 157
 158         void submit(SQLQuery* query, const std::string& q)
 159         {
 160                 Query(query, q);
 161                 delete query;
 162         }
 163
 164         void submit(SQLQuery* query, const std::string& q, const ParamL& p)
 165         {
 166                 std::string res;
 167                 unsigned int param = 0;
 168                 for(std::string::size_type i = 0; i < q.length(); i++)
 169                 {
 170                         if (q[i] != '?')
 171                                 res.push_back(q[i]);
 172                         else
 173                         {
 174                                 if (param < p.size())
 175                                 {
 176                                         char* escaped = sqlite3_mprintf("%q", p[param++].c_str());
 177                                         res.append(escaped);
 178                                         sqlite3_free(escaped);
 179                                 }
 180                         }
 181                 }
 182                 submit(query, res);
 183         }
 184
 185         void submit(SQLQuery* query, const std::string& q, const ParamM& p)
 186         {
 187                 std::string res;
 188                 for(std::string::size_type i = 0; i < q.length(); i++)
 189                 {
 190                         if (q[i] != '$')
 191                                 res.push_back(q[i]);
 192                         else
 193                         {
 194                                 std::string field;
 195                                 i++;
 196                                 while (i < q.length() && isalnum(q[i]))
 197                                         field.push_back(q[i++]);
 198                                 i--;
 199
 200                                 ParamM::const_iterator it = p.find(field);
 201                                 if (it != p.end())
 202                                 {
 203                                         char* escaped = sqlite3_mprintf("%q", it->second.c_str());
 204                                         res.append(escaped);
 205                                         sqlite3_free(escaped);
 206                                 }
 207                         }
 208                 }
 209                 submit(query, res);
 210         }
 211 };
 212
 213 class ModuleSQLite3 : public Module
 214 {
 215         ConnMap conns;
 216
 217  public:
 218         ~ModuleSQLite3()
 219         {
 220                 ClearConns();
 221         }
 222
 223         void ClearConns()
 224         {
 225                 for(ConnMap::iterator i = conns.begin(); i != conns.end(); i++)
 226                 {
 227                         SQLConn* conn = i->second;
 228                         ServerInstance->Modules->DelService(*conn);
 229                         delete conn;
 230                 }
 231                 conns.clear();
 232         }
 233
 234         void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
 235         {
 236                 ClearConns();
 237                 ConfigTagList tags = ServerInstance->Config->ConfTags("database");
 238                 for(ConfigIter i = tags.first; i != tags.second; i++)
 239                 {
 240                         if (i->second->getString("module", "sqlite") != "sqlite")
 241                                 continue;
 242                         SQLConn* conn = new SQLConn(this, i->second);
 243                         conns.insert(std::make_pair(i->second->getString("id"), conn));
 244                         ServerInstance->Modules->AddService(*conn);
 245                 }
 246         }
 247
 248         Version GetVersion() CXX11_OVERRIDE
 249         {
 250                 return Version("sqlite3 provider", VF_VENDOR);
 251         }
 252 };
 253
 254 MODULE_INIT(ModuleSQLite3)