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("centos") pkgconfig sqlite-devel
  26 /// $PackageInfo: require_system("darwin") pkg-config sqlite3
  27 /// $PackageInfo: require_system("debian") libsqlite3-dev pkg-config
  28 /// $PackageInfo: require_system("ubuntu") libsqlite3-dev pkg-config
  29
  30 #include "inspircd.h"
  31 #include "modules/sql.h"
  32
  33 // Fix warnings about the use of `long long` on C++03.
  34 #if defined __clang__
  35 # pragma clang diagnostic ignored "-Wc++11-long-long"
  36 #elif defined __GNUC__
  37 # pragma GCC diagnostic ignored "-Wlong-long"
  38 #endif
  39
  40 #include <sqlite3.h>
  41
  42 #ifdef _WIN32
  43 # pragma comment(lib, "sqlite3.lib")
  44 #endif
  45
  46 class SQLConn;
  47 typedef insp::flat_map<std::string, SQLConn*> ConnMap;
  48
  49 class SQLite3Result : public SQL::Result
  50 {
  51  public:
  52         int currentrow;
  53         int rows;
  54         std::vector<std::string> columns;
  55         std::vector<SQL::Row> fieldlists;
  56
  57         SQLite3Result() : currentrow(0), rows(0)
  58         {
  59         }
  60
  61         int Rows() CXX11_OVERRIDE
  62         {
  63                 return rows;
  64         }
  65
  66         bool GetRow(SQL::Row& result) CXX11_OVERRIDE
  67         {
  68                 if (currentrow < rows)
  69                 {
  70                         result.assign(fieldlists[currentrow].begin(), fieldlists[currentrow].end());
  71                         currentrow++;
  72                         return true;
  73                 }
  74                 else
  75                 {
  76                         result.clear();
  77                         return false;
  78                 }
  79         }
  80
  81         void GetCols(std::vector<std::string>& result) CXX11_OVERRIDE
  82         {
  83                 result.assign(columns.begin(), columns.end());
  84         }
  85
  86         bool HasColumn(const std::string& column, size_t& index) CXX11_OVERRIDE
  87         {
  88                 for (size_t i = 0; i < columns.size(); ++i)
  89                 {
  90                         if (columns[i] == column)
  91                         {
  92                                 index = i;
  93                                 return true;
  94                         }
  95                 }
  96                 return false;
  97         }
  98 };
  99
 100 class SQLConn : public SQL::Provider
 101 {
 102         sqlite3* conn;
 103         reference<ConfigTag> config;
 104
 105  public:
 106         SQLConn(Module* Parent, ConfigTag* tag) : SQL::Provider(Parent, "SQL/" + tag->getString("id")), config(tag)
 107         {
 108                 std::string host = tag->getString("hostname");
 109                 if (sqlite3_open_v2(host.c_str(), &conn, SQLITE_OPEN_READWRITE, 0) != SQLITE_OK)
 110                 {
 111                         // Even in case of an error conn must be closed
 112                         sqlite3_close(conn);
 113                         conn = NULL;
 114                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: Could not open DB with id: " + tag->getString("id"));
 115                 }
 116         }
 117
 118         ~SQLConn()
 119         {
 120                 if (conn)
 121                 {
 122                         sqlite3_interrupt(conn);
 123                         sqlite3_close(conn);
 124                 }
 125         }
 126
 127         void Query(SQL::Query* query, const std::string& q)
 128         {
 129                 SQLite3Result res;
 130                 sqlite3_stmt *stmt;
 131                 int err = sqlite3_prepare_v2(conn, q.c_str(), q.length(), &stmt, NULL);
 132                 if (err != SQLITE_OK)
 133                 {
 134                         SQL::Error error(SQL::QSEND_FAIL, sqlite3_errmsg(conn));
 135                         query->OnError(error);
 136                         return;
 137                 }
 138                 int cols = sqlite3_column_count(stmt);
 139                 res.columns.resize(cols);
 140                 for(int i=0; i < cols; i++)
 141                 {
 142                         res.columns[i] = sqlite3_column_name(stmt, i);
 143                 }
 144                 while (1)
 145                 {
 146                         err = sqlite3_step(stmt);
 147                         if (err == SQLITE_ROW)
 148                         {
 149                                 // Add the row
 150                                 res.fieldlists.resize(res.rows + 1);
 151                                 res.fieldlists[res.rows].resize(cols);
 152                                 for(int i=0; i < cols; i++)
 153                                 {
 154                                         const char* txt = (const char*)sqlite3_column_text(stmt, i);
 155                                         if (txt)
 156                                                 res.fieldlists[res.rows][i] = SQL::Field(txt);
 157                                 }
 158                                 res.rows++;
 159                         }
 160                         else if (err == SQLITE_DONE)
 161                         {
 162                                 query->OnResult(res);
 163                                 break;
 164                         }
 165                         else
 166                         {
 167                                 SQL::Error error(SQL::QREPLY_FAIL, sqlite3_errmsg(conn));
 168                                 query->OnError(error);
 169                                 break;
 170                         }
 171                 }
 172                 sqlite3_finalize(stmt);
 173         }
 174
 175         void Submit(SQL::Query* query, const std::string& q) CXX11_OVERRIDE
 176         {
 177                 Query(query, q);
 178                 delete query;
 179         }
 180
 181         void Submit(SQL::Query* query, const std::string& q, const SQL::ParamList& p) CXX11_OVERRIDE
 182         {
 183                 std::string res;
 184                 unsigned int param = 0;
 185                 for(std::string::size_type i = 0; i < q.length(); i++)
 186                 {
 187                         if (q[i] != '?')
 188                                 res.push_back(q[i]);
 189                         else
 190                         {
 191                                 if (param < p.size())
 192                                 {
 193                                         char* escaped = sqlite3_mprintf("%q", p[param++].c_str());
 194                                         res.append(escaped);
 195                                         sqlite3_free(escaped);
 196                                 }
 197                         }
 198                 }
 199                 Submit(query, res);
 200         }
 201
 202         void Submit(SQL::Query* query, const std::string& q, const SQL::ParamMap& p) CXX11_OVERRIDE
 203         {
 204                 std::string res;
 205                 for(std::string::size_type i = 0; i < q.length(); i++)
 206                 {
 207                         if (q[i] != '$')
 208                                 res.push_back(q[i]);
 209                         else
 210                         {
 211                                 std::string field;
 212                                 i++;
 213                                 while (i < q.length() && isalnum(q[i]))
 214                                         field.push_back(q[i++]);
 215                                 i--;
 216
 217                                 SQL::ParamMap::const_iterator it = p.find(field);
 218                                 if (it != p.end())
 219                                 {
 220                                         char* escaped = sqlite3_mprintf("%q", it->second.c_str());
 221                                         res.append(escaped);
 222                                         sqlite3_free(escaped);
 223                                 }
 224                         }
 225                 }
 226                 Submit(query, res);
 227         }
 228 };
 229
 230 class ModuleSQLite3 : public Module
 231 {
 232         ConnMap conns;
 233
 234  public:
 235         ~ModuleSQLite3()
 236         {
 237                 ClearConns();
 238         }
 239
 240         void ClearConns()
 241         {
 242                 for(ConnMap::iterator i = conns.begin(); i != conns.end(); i++)
 243                 {
 244                         SQLConn* conn = i->second;
 245                         ServerInstance->Modules->DelService(*conn);
 246                         delete conn;
 247                 }
 248                 conns.clear();
 249         }
 250
 251         void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
 252         {
 253                 ClearConns();
 254                 ConfigTagList tags = ServerInstance->Config->ConfTags("database");
 255                 for(ConfigIter i = tags.first; i != tags.second; i++)
 256                 {
 257                         if (!stdalgo::string::equalsci(i->second->getString("module"), "sqlite"))
 258                                 continue;
 259                         SQLConn* conn = new SQLConn(this, i->second);
 260                         conns.insert(std::make_pair(i->second->getString("id"), conn));
 261                         ServerInstance->Modules->AddService(*conn);
 262                 }
 263         }
 264
 265         Version GetVersion() CXX11_OVERRIDE
 266         {
 267                 return Version("sqlite3 provider", VF_VENDOR);
 268         }
 269 };
 270
 271 MODULE_INIT(ModuleSQLite3)