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 /// $CompilerFlags: find_compiler_flags("sqlite3")
  23 /// $LinkerFlags: find_linker_flags("sqlite3" "-lsqlite3")
  24
  25 /// $PackageInfo: require_system("darwin") pkg-config sqlite3
  26 /// $PackageInfo: require_system("ubuntu") libsqlite3-dev pkg-config
  27
  28 #include "inspircd.h"
  29 #include "modules/sql.h"
  30
  31 // Fix warnings about the use of `long long` on C++03.
  32 #if defined __clang__
  33 # pragma clang diagnostic ignored "-Wc++11-long-long"
  34 #elif defined __GNUC__
  35 # pragma GCC diagnostic ignored "-Wlong-long"
  36 #endif
  37
  38 #include <sqlite3.h>
  39
  40 #ifdef _WIN32
  41 # pragma comment(lib, "sqlite3.lib")
  42 #endif
  43
  44 class SQLConn;
  45 typedef insp::flat_map<std::string, SQLConn*> ConnMap;
  46
  47 class SQLite3Result : public SQLResult
  48 {
  49  public:
  50         int currentrow;
  51         int rows;
  52         std::vector<std::string> columns;
  53         std::vector<SQLEntries> fieldlists;
  54
  55         SQLite3Result() : currentrow(0), rows(0)
  56         {
  57         }
  58
  59         int Rows()
  60         {
  61                 return rows;
  62         }
  63
  64         bool GetRow(SQLEntries& result)
  65         {
  66                 if (currentrow < rows)
  67                 {
  68                         result.assign(fieldlists[currentrow].begin(), fieldlists[currentrow].end());
  69                         currentrow++;
  70                         return true;
  71                 }
  72                 else
  73                 {
  74                         result.clear();
  75                         return false;
  76                 }
  77         }
  78
  79         void GetCols(std::vector<std::string>& result)
  80         {
  81                 result.assign(columns.begin(), columns.end());
  82         }
  83 };
  84
  85 class SQLConn : public SQLProvider
  86 {
  87         sqlite3* conn;
  88         reference<ConfigTag> config;
  89
  90  public:
  91         SQLConn(Module* Parent, ConfigTag* tag) : SQLProvider(Parent, "SQL/" + tag->getString("id")), config(tag)
  92         {
  93                 std::string host = tag->getString("hostname");
  94                 if (sqlite3_open_v2(host.c_str(), &conn, SQLITE_OPEN_READWRITE, 0) != SQLITE_OK)
  95                 {
  96                         // Even in case of an error conn must be closed
  97                         sqlite3_close(conn);
  98                         conn = NULL;
  99                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: Could not open DB with id: " + tag->getString("id"));
 100                 }
 101         }
 102
 103         ~SQLConn()
 104         {
 105                 if (conn)
 106                 {
 107                         sqlite3_interrupt(conn);
 108                         sqlite3_close(conn);
 109                 }
 110         }
 111
 112         void Query(SQLQuery* query, const std::string& q)
 113         {
 114                 SQLite3Result res;
 115                 sqlite3_stmt *stmt;
 116                 int err = sqlite3_prepare_v2(conn, q.c_str(), q.length(), &stmt, NULL);
 117                 if (err != SQLITE_OK)
 118                 {
 119                         SQLerror error(SQL_QSEND_FAIL, sqlite3_errmsg(conn));
 120                         query->OnError(error);
 121                         return;
 122                 }
 123                 int cols = sqlite3_column_count(stmt);
 124                 res.columns.resize(cols);
 125                 for(int i=0; i < cols; i++)
 126                 {
 127                         res.columns[i] = sqlite3_column_name(stmt, i);
 128                 }
 129                 while (1)
 130                 {
 131                         err = sqlite3_step(stmt);
 132                         if (err == SQLITE_ROW)
 133                         {
 134                                 // Add the row
 135                                 res.fieldlists.resize(res.rows + 1);
 136                                 res.fieldlists[res.rows].resize(cols);
 137                                 for(int i=0; i < cols; i++)
 138                                 {
 139                                         const char* txt = (const char*)sqlite3_column_text(stmt, i);
 140                                         if (txt)
 141                                                 res.fieldlists[res.rows][i] = SQLEntry(txt);
 142                                 }
 143                                 res.rows++;
 144                         }
 145                         else if (err == SQLITE_DONE)
 146                         {
 147                                 query->OnResult(res);
 148                                 break;
 149                         }
 150                         else
 151                         {
 152                                 SQLerror error(SQL_QREPLY_FAIL, sqlite3_errmsg(conn));
 153                                 query->OnError(error);
 154                                 break;
 155                         }
 156                 }
 157                 sqlite3_finalize(stmt);
 158         }
 159
 160         void submit(SQLQuery* query, const std::string& q)
 161         {
 162                 Query(query, q);
 163                 delete query;
 164         }
 165
 166         void submit(SQLQuery* query, const std::string& q, const ParamL& p)
 167         {
 168                 std::string res;
 169                 unsigned int param = 0;
 170                 for(std::string::size_type i = 0; i < q.length(); i++)
 171                 {
 172                         if (q[i] != '?')
 173                                 res.push_back(q[i]);
 174                         else
 175                         {
 176                                 if (param < p.size())
 177                                 {
 178                                         char* escaped = sqlite3_mprintf("%q", p[param++].c_str());
 179                                         res.append(escaped);
 180                                         sqlite3_free(escaped);
 181                                 }
 182                         }
 183                 }
 184                 submit(query, res);
 185         }
 186
 187         void submit(SQLQuery* query, const std::string& q, const ParamM& p)
 188         {
 189                 std::string res;
 190                 for(std::string::size_type i = 0; i < q.length(); i++)
 191                 {
 192                         if (q[i] != '$')
 193                                 res.push_back(q[i]);
 194                         else
 195                         {
 196                                 std::string field;
 197                                 i++;
 198                                 while (i < q.length() && isalnum(q[i]))
 199                                         field.push_back(q[i++]);
 200                                 i--;
 201
 202                                 ParamM::const_iterator it = p.find(field);
 203                                 if (it != p.end())
 204                                 {
 205                                         char* escaped = sqlite3_mprintf("%q", it->second.c_str());
 206                                         res.append(escaped);
 207                                         sqlite3_free(escaped);
 208                                 }
 209                         }
 210                 }
 211                 submit(query, res);
 212         }
 213 };
 214
 215 class ModuleSQLite3 : public Module
 216 {
 217         ConnMap conns;
 218
 219  public:
 220         ~ModuleSQLite3()
 221         {
 222                 ClearConns();
 223         }
 224
 225         void ClearConns()
 226         {
 227                 for(ConnMap::iterator i = conns.begin(); i != conns.end(); i++)
 228                 {
 229                         SQLConn* conn = i->second;
 230                         ServerInstance->Modules->DelService(*conn);
 231                         delete conn;
 232                 }
 233                 conns.clear();
 234         }
 235
 236         void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
 237         {
 238                 ClearConns();
 239                 ConfigTagList tags = ServerInstance->Config->ConfTags("database");
 240                 for(ConfigIter i = tags.first; i != tags.second; i++)
 241                 {
 242                         if (i->second->getString("module", "sqlite") != "sqlite")
 243                                 continue;
 244                         SQLConn* conn = new SQLConn(this, i->second);
 245                         conns.insert(std::make_pair(i->second->getString("id"), conn));
 246                         ServerInstance->Modules->AddService(*conn);
 247                 }
 248         }
 249
 250         Version GetVersion() CXX11_OVERRIDE
 251         {
 252                 return Version("sqlite3 provider", VF_VENDOR);
 253         }
 254 };
 255
 256 MODULE_INIT(ModuleSQLite3)