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