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