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 std::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                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: Could not open DB with id: " + tag->getString("id"));
  95                         conn = NULL;
  96                 }
  97         }
  98
  99         ~SQLConn()
 100         {
 101                 sqlite3_interrupt(conn);
 102                 sqlite3_close(conn);
 103         }
 104
 105         void Query(SQLQuery* query, const std::string& q)
 106         {
 107                 SQLite3Result res;
 108                 sqlite3_stmt *stmt;
 109                 int err = sqlite3_prepare_v2(conn, q.c_str(), q.length(), &stmt, NULL);
 110                 if (err != SQLITE_OK)
 111                 {
 112                         SQLerror error(SQL_QSEND_FAIL, sqlite3_errmsg(conn));
 113                         query->OnError(error);
 114                         return;
 115                 }
 116                 int cols = sqlite3_column_count(stmt);
 117                 res.columns.resize(cols);
 118                 for(int i=0; i < cols; i++)
 119                 {
 120                         res.columns[i] = sqlite3_column_name(stmt, i);
 121                 }
 122                 while (1)
 123                 {
 124                         err = sqlite3_step(stmt);
 125                         if (err == SQLITE_ROW)
 126                         {
 127                                 // Add the row
 128                                 res.fieldlists.resize(res.rows + 1);
 129                                 res.fieldlists[res.rows].resize(cols);
 130                                 for(int i=0; i < cols; i++)
 131                                 {
 132                                         const char* txt = (const char*)sqlite3_column_text(stmt, i);
 133                                         if (txt)
 134                                                 res.fieldlists[res.rows][i] = SQLEntry(txt);
 135                                 }
 136                                 res.rows++;
 137                         }
 138                         else if (err == SQLITE_DONE)
 139                         {
 140                                 query->OnResult(res);
 141                                 break;
 142                         }
 143                         else
 144                         {
 145                                 SQLerror error(SQL_QREPLY_FAIL, sqlite3_errmsg(conn));
 146                                 query->OnError(error);
 147                                 break;
 148                         }
 149                 }
 150                 sqlite3_finalize(stmt);
 151         }
 152
 153         void submit(SQLQuery* query, const std::string& q)
 154         {
 155                 Query(query, q);
 156                 delete query;
 157         }
 158
 159         void submit(SQLQuery* query, const std::string& q, const ParamL& p)
 160         {
 161                 std::string res;
 162                 unsigned int param = 0;
 163                 for(std::string::size_type i = 0; i < q.length(); i++)
 164                 {
 165                         if (q[i] != '?')
 166                                 res.push_back(q[i]);
 167                         else
 168                         {
 169                                 if (param < p.size())
 170                                 {
 171                                         char* escaped = sqlite3_mprintf("%q", p[param++].c_str());
 172                                         res.append(escaped);
 173                                         sqlite3_free(escaped);
 174                                 }
 175                         }
 176                 }
 177                 submit(query, res);
 178         }
 179
 180         void submit(SQLQuery* query, const std::string& q, const ParamM& p)
 181         {
 182                 std::string res;
 183                 for(std::string::size_type i = 0; i < q.length(); i++)
 184                 {
 185                         if (q[i] != '$')
 186                                 res.push_back(q[i]);
 187                         else
 188                         {
 189                                 std::string field;
 190                                 i++;
 191                                 while (i < q.length() && isalnum(q[i]))
 192                                         field.push_back(q[i++]);
 193                                 i--;
 194
 195                                 ParamM::const_iterator it = p.find(field);
 196                                 if (it != p.end())
 197                                 {
 198                                         char* escaped = sqlite3_mprintf("%q", it->second.c_str());
 199                                         res.append(escaped);
 200                                         sqlite3_free(escaped);
 201                                 }
 202                         }
 203                 }
 204                 submit(query, res);
 205         }
 206 };
 207
 208 class ModuleSQLite3 : public Module
 209 {
 210         ConnMap conns;
 211
 212  public:
 213         ~ModuleSQLite3()
 214         {
 215                 ClearConns();
 216         }
 217
 218         void ClearConns()
 219         {
 220                 for(ConnMap::iterator i = conns.begin(); i != conns.end(); i++)
 221                 {
 222                         SQLConn* conn = i->second;
 223                         ServerInstance->Modules->DelService(*conn);
 224                         delete conn;
 225                 }
 226                 conns.clear();
 227         }
 228
 229         void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
 230         {
 231                 ClearConns();
 232                 ConfigTagList tags = ServerInstance->Config->ConfTags("database");
 233                 for(ConfigIter i = tags.first; i != tags.second; i++)
 234                 {
 235                         if (i->second->getString("module", "sqlite") != "sqlite")
 236                                 continue;
 237                         SQLConn* conn = new SQLConn(this, i->second);
 238                         conns.insert(std::make_pair(i->second->getString("id"), conn));
 239                         ServerInstance->Modules->AddService(*conn);
 240                 }
 241         }
 242
 243         Version GetVersion() CXX11_OVERRIDE
 244         {
 245                 return Version("sqlite3 provider", VF_VENDOR);
 246         }
 247 };
 248
 249 MODULE_INIT(ModuleSQLite3)