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 <sqlite3.h>
  25 #include "modules/sql.h"
  26
  27 #ifdef _WIN32
  28 # pragma comment(lib, "sqlite3.lib")
  29 #endif
  30
  31 /* $CompileFlags: pkgconfversion("sqlite3","3.3") pkgconfincludes("sqlite3","/sqlite3.h","") */
  32 /* $LinkerFlags: pkgconflibs("sqlite3","/libsqlite3.so","-lsqlite3") */
  33 /* $NoPedantic */
  34
  35 class SQLConn;
  36 typedef std::map<std::string, SQLConn*> ConnMap;
  37
  38 class SQLite3Result : public SQLResult
  39 {
  40  public:
  41         int currentrow;
  42         int rows;
  43         std::vector<std::string> columns;
  44         std::vector<SQLEntries> fieldlists;
  45
  46         SQLite3Result() : currentrow(0), rows(0)
  47         {
  48         }
  49
  50         int Rows()
  51         {
  52                 return rows;
  53         }
  54
  55         bool GetRow(SQLEntries& result)
  56         {
  57                 if (currentrow < rows)
  58                 {
  59                         result.assign(fieldlists[currentrow].begin(), fieldlists[currentrow].end());
  60                         currentrow++;
  61                         return true;
  62                 }
  63                 else
  64                 {
  65                         result.clear();
  66                         return false;
  67                 }
  68         }
  69
  70         void GetCols(std::vector<std::string>& result)
  71         {
  72                 result.assign(columns.begin(), columns.end());
  73         }
  74 };
  75
  76 class SQLConn : public SQLProvider
  77 {
  78         sqlite3* conn;
  79         reference<ConfigTag> config;
  80
  81  public:
  82         SQLConn(Module* Parent, ConfigTag* tag) : SQLProvider(Parent, "SQL/" + tag->getString("id")), config(tag)
  83         {
  84                 std::string host = tag->getString("hostname");
  85                 if (sqlite3_open_v2(host.c_str(), &conn, SQLITE_OPEN_READWRITE, 0) != SQLITE_OK)
  86                 {
  87                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: Could not open DB with id: " + tag->getString("id"));
  88                         conn = NULL;
  89                 }
  90         }
  91
  92         ~SQLConn()
  93         {
  94                 sqlite3_interrupt(conn);
  95                 sqlite3_close(conn);
  96         }
  97
  98         void Query(SQLQuery* query, const std::string& q)
  99         {
 100                 SQLite3Result res;
 101                 sqlite3_stmt *stmt;
 102                 int err = sqlite3_prepare_v2(conn, q.c_str(), q.length(), &stmt, NULL);
 103                 if (err != SQLITE_OK)
 104                 {
 105                         SQLerror error(SQL_QSEND_FAIL, sqlite3_errmsg(conn));
 106                         query->OnError(error);
 107                         return;
 108                 }
 109                 int cols = sqlite3_column_count(stmt);
 110                 res.columns.resize(cols);
 111                 for(int i=0; i < cols; i++)
 112                 {
 113                         res.columns[i] = sqlite3_column_name(stmt, i);
 114                 }
 115                 while (1)
 116                 {
 117                         err = sqlite3_step(stmt);
 118                         if (err == SQLITE_ROW)
 119                         {
 120                                 // Add the row
 121                                 res.fieldlists.resize(res.rows + 1);
 122                                 res.fieldlists[res.rows].resize(cols);
 123                                 for(int i=0; i < cols; i++)
 124                                 {
 125                                         const char* txt = (const char*)sqlite3_column_text(stmt, i);
 126                                         if (txt)
 127                                                 res.fieldlists[res.rows][i] = SQLEntry(txt);
 128                                 }
 129                                 res.rows++;
 130                         }
 131                         else if (err == SQLITE_DONE)
 132                         {
 133                                 query->OnResult(res);
 134                                 break;
 135                         }
 136                         else
 137                         {
 138                                 SQLerror error(SQL_QREPLY_FAIL, sqlite3_errmsg(conn));
 139                                 query->OnError(error);
 140                                 break;
 141                         }
 142                 }
 143                 sqlite3_finalize(stmt);
 144         }
 145
 146         void submit(SQLQuery* query, const std::string& q)
 147         {
 148                 Query(query, q);
 149                 delete query;
 150         }
 151
 152         void submit(SQLQuery* query, const std::string& q, const ParamL& p)
 153         {
 154                 std::string res;
 155                 unsigned int param = 0;
 156                 for(std::string::size_type i = 0; i < q.length(); i++)
 157                 {
 158                         if (q[i] != '?')
 159                                 res.push_back(q[i]);
 160                         else
 161                         {
 162                                 if (param < p.size())
 163                                 {
 164                                         char* escaped = sqlite3_mprintf("%q", p[param++].c_str());
 165                                         res.append(escaped);
 166                                         sqlite3_free(escaped);
 167                                 }
 168                         }
 169                 }
 170                 submit(query, res);
 171         }
 172
 173         void submit(SQLQuery* query, const std::string& q, const ParamM& p)
 174         {
 175                 std::string res;
 176                 for(std::string::size_type i = 0; i < q.length(); i++)
 177                 {
 178                         if (q[i] != '$')
 179                                 res.push_back(q[i]);
 180                         else
 181                         {
 182                                 std::string field;
 183                                 i++;
 184                                 while (i < q.length() && isalnum(q[i]))
 185                                         field.push_back(q[i++]);
 186                                 i--;
 187
 188                                 ParamM::const_iterator it = p.find(field);
 189                                 if (it != p.end())
 190                                 {
 191                                         char* escaped = sqlite3_mprintf("%q", it->second.c_str());
 192                                         res.append(escaped);
 193                                         sqlite3_free(escaped);
 194                                 }
 195                         }
 196                 }
 197                 submit(query, res);
 198         }
 199 };
 200
 201 class ModuleSQLite3 : public Module
 202 {
 203         ConnMap conns;
 204
 205  public:
 206         void init() CXX11_OVERRIDE
 207         {
 208                 ReadConf();
 209
 210                 Implementation eventlist[] = { I_OnRehash };
 211                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 212         }
 213
 214         ~ModuleSQLite3()
 215         {
 216                 ClearConns();
 217         }
 218
 219         void ClearConns()
 220         {
 221                 for(ConnMap::iterator i = conns.begin(); i != conns.end(); i++)
 222                 {
 223                         SQLConn* conn = i->second;
 224                         ServerInstance->Modules->DelService(*conn);
 225                         delete conn;
 226                 }
 227                 conns.clear();
 228         }
 229
 230         void ReadConf()
 231         {
 232                 ClearConns();
 233                 ConfigTagList tags = ServerInstance->Config->ConfTags("database");
 234                 for(ConfigIter i = tags.first; i != tags.second; i++)
 235                 {
 236                         if (i->second->getString("module", "sqlite") != "sqlite")
 237                                 continue;
 238                         SQLConn* conn = new SQLConn(this, i->second);
 239                         conns.insert(std::make_pair(i->second->getString("id"), conn));
 240                         ServerInstance->Modules->AddService(*conn);
 241                 }
 242         }
 243
 244         void OnRehash(User* user) CXX11_OVERRIDE
 245         {
 246                 ReadConf();
 247         }
 248
 249         Version GetVersion() CXX11_OVERRIDE
 250         {
 251                 return Version("sqlite3 provider", VF_VENDOR);
 252         }
 253 };
 254
 255 MODULE_INIT(ModuleSQLite3)