OMG SQLITE3 support, almost there now =)

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@6321 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 532 insertions, 0 deletions

diff --git a/src/modules/extra/m_sqlite3.cpp b/src/modules/extra/m_sqlite3.cpp
new file mode 100644
index 000000000..b0a0afbe5
--- /dev/null
+++ b/src/modules/extra/m_sqlite3.cpp
@@ -0,0 +1,532 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
+ *
+ * This program is free but copyrighted software; see
+ *            the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include <string>
+#include <deque>
+#include <map>
+#include <sqlite3.h>
+
+#include "users.h"
+#include "channels.h"
+#include "modules.h"
+#include "inspircd.h"
+#include "configreader.h"
+
+#include "m_sqlv2.h"
+
+/* $ModDesc: sqlite3 provider */
+/* $CompileFlags: pkgconfincludes("sqlite3","/sqlite3.h","") */
+/* $LinkerFlags: pkgconflibs("sqlite3","/libsqlite3.so","-lsqlite3") */
+/* $ModDep: m_sqlv2.h */
+
+
+class SQLConn;
+class SQLite3Result;
+
+typedef std::map<std::string, SQLConn*> ConnMap;
+typedef std::deque<classbase*> paramlist;
+typedef std::deque<SQLite3Result*> ResultQueue;
+
+class SQLite3Result : public SQLresult
+{
+  private:
+	int currentrow;
+	int rows;
+	int cols;
+
+	std::vector<std::string> colnames;
+	std::vector<SQLfieldList> fieldlists;
+	SQLfieldList emptyfieldlist;
+
+	SQLfieldList* fieldlist;
+	SQLfieldMap* fieldmap;
+
+  public:
+	SQLite3Result(Module* self, Module* to, unsigned int id)
+	: SQLresult(self, to, id), currentrow(0), rows(0), cols(0)
+	{
+	}
+
+	~SQLite3Result()
+	{
+	}
+
+	void AddRow(int colsnum, char **data, char **colname)
+	{
+		colnames.clear();
+		cols = colsnum;
+		for (int i = 0; i < colsnum; i++)
+		{
+			fieldlists.resize(fieldlists.size()+1);
+			colnames.push_back(colname[i]);
+			SQLfield sf(data[i] ? data[i] : "", data[i] ? false : true);
+			fieldlists[rows].push_back(sf);

+		}
+		rows++;
+	}
+
+	virtual int Rows()
+	{
+		return rows;
+	}
+
+	virtual int Cols()
+	{
+		return cols;
+	}
+
+	virtual std::string ColName(int column)
+	{
+		if (column < (int)colnames.size())
+		{
+			return colnames[column];
+		}
+		else
+		{
+			throw SQLbadColName();
+		}
+		return "";
+	}
+
+	virtual int ColNum(const std::string &column)
+	{
+		for (unsigned int i = 0; i < colnames.size(); i++)
+		{
+			if (column == colnames[i])
+				return i;
+		}
+		throw SQLbadColName();
+		return 0;
+	}
+
+	virtual SQLfield GetValue(int row, int column)
+	{
+		if ((row >= 0) && (row < rows) && (column >= 0) && (column < Cols()))
+		{
+			return fieldlists[row][column];
+		}
+
+		throw SQLbadColName();
+
+		/* XXX: We never actually get here because of the throw */
+		return SQLfield("",true);
+	}
+
+	virtual SQLfieldList& GetRow()
+	{
+		if (currentrow < rows)
+			return fieldlists[currentrow];
+		else
+			return emptyfieldlist;
+	}
+
+	virtual SQLfieldMap& GetRowMap()
+	{
+		/* In an effort to reduce overhead we don't actually allocate the map
+		 * until the first time it's needed...so...
+		 */
+		if(fieldmap)
+		{
+			fieldmap->clear();
+		}
+		else
+		{
+			fieldmap = new SQLfieldMap;
+		}
+
+		if (currentrow < rows)
+		{
+			for (int i = 0; i < Cols(); i++)
+			{
+				fieldmap->insert(std::make_pair(ColName(i), GetValue(currentrow, i)));
+			}
+			currentrow++;
+		}
+
+		return *fieldmap;
+	}
+
+	virtual SQLfieldList* GetRowPtr()
+	{
+		fieldlist = new SQLfieldList();
+
+		if (currentrow < rows)
+		{
+			for (int i = 0; i < Rows(); i++)
+			{
+				fieldlist->push_back(fieldlists[currentrow][i]);
+			}
+			currentrow++;
+		}
+		return fieldlist;
+	}
+
+	virtual SQLfieldMap* GetRowMapPtr()
+	{
+		fieldmap = new SQLfieldMap();
+
+		if (currentrow < rows)
+		{
+			for (int i = 0; i < Cols(); i++)
+			{
+				fieldmap->insert(std::make_pair(colnames[i],GetValue(currentrow, i)));
+			}
+			currentrow++;
+		}
+
+		return fieldmap;
+	}
+
+	virtual void Free(SQLfieldMap* fm)
+	{
+		delete fm;
+	}
+
+	virtual void Free(SQLfieldList* fl)
+	{
+		delete fl;
+	}
+
+
+};
+
+class SQLConn : public classbase
+{
+  private:
+	ResultQueue results;
+  	InspIRCd* Instance;
+	Module* mod;
+	SQLhost host;
+	sqlite3* conn;
+
+  public:
+	SQLConn(InspIRCd* SI, Module* m, const SQLhost& hi)
+	: Instance(SI), mod(m), host(hi)
+	{
+		int result;
+		if ((result = OpenDB()) == SQLITE_OK)
+		{
+			Instance->Log(DEBUG, "Opened sqlite DB: " + host.host);
+		}
+		else
+		{
+			Instance->Log(DEFAULT, "WARNING: Could not open DB with id: " + host.id);
+			CloseDB();
+		}
+	}
+
+	SQLerror Query(SQLrequest &req)
+	{
+		/* Pointer to the buffer we screw around with substitution in */
+		char* query;
+
+		/* Pointer to the current end of query, where we append new stuff */
+		char* queryend;
+
+		/* Total length of the unescaped parameters */
+		unsigned long paramlen;
+
+		/* Total length of query, used for binary-safety in mysql_real_query */
+		unsigned long querylength = 0;
+
+		paramlen = 0;
+		for(ParamL::iterator i = req.query.p.begin(); i != req.query.p.end(); i++)
+		{
+			paramlen += i->size();
+		}
+
+		/* To avoid a lot of allocations, allocate enough memory for the biggest the escaped query could possibly be.
+		 * sizeofquery + (totalparamlength*2) + 1
+		 *
+		 * The +1 is for null-terminating the string for mysql_real_escape_string
+		 */
+
+		query = new char[req.query.q.length() + (paramlen*2) + 1];
+		queryend = query;
+
+		for(unsigned long i = 0; i < req.query.q.length(); i++)
+		{
+			if(req.query.q[i] == '?')
+			{
+				if(req.query.p.size())
+				{
+					char* escaped;
+					escaped = sqlite3_mprintf("%q", req.query.p.front().c_str());
+					for (char* n = escaped; *n; n++)
+					{
+						*queryend = *n;
+						queryend++;
+					}
+					sqlite3_free(escaped);
+					req.query.p.pop_front();
+				}
+				else
+					break;
+			}
+			else
+			{
+				*queryend = req.query.q[i];
+				queryend++;
+			}
+			querylength++;
+		}
+		*queryend = 0;
+		req.query.q = query;
+
+//		Instance->Log(DEBUG, "<******> Doing query: " + ConvToStr(req.query.q.data()));
+
+		SQLite3Result* res = new SQLite3Result(mod, req.GetSource(), req.id);
+		res->query = req.query.q;
+		paramlist params;
+		params.push_back(this);
+		params.push_back(res);
+
+		char *errmsg = 0;
+		if (sqlite3_exec(conn, req.query.q.data(), QueryResult, &params, &errmsg) != SQLITE_OK)
+		{
+			Instance->Log(DEBUG, "Query failed: " + ConvToStr(errmsg));
+			sqlite3_free(errmsg);
+			delete[] query;
+			delete res;
+			return SQLerror(QSEND_FAIL, ConvToStr(errmsg));
+		}
+		Instance->Log(DEBUG, "Dispatched query successfully. ID: %d resulting rows %d", req.id, res->Rows());
+		delete[] query;
+
+		results.push_back(res);
+
+		return SQLerror();
+	}
+
+	static int QueryResult(void *params, int argc, char **argv, char **azColName)
+	{
+		paramlist* p = (paramlist*)params;
+		((SQLConn*)(*p)[0])->ResultReady(((SQLite3Result*)(*p)[1]), argc, argv, azColName);
+		return 0;
+	}
+
+	void ResultReady(SQLite3Result *res, int cols, char **data, char **colnames)
+	{
+		res->AddRow(cols, data, colnames);
+	}
+
+	void QueryDone(SQLrequest* req, int rows)
+	{
+		SQLite3Result* r = new SQLite3Result(mod, req->GetSource(), req->id);
+		r->dbid = host.id;
+		r->query = req->query.q;
+	}
+
+	int OpenDB()
+	{
+		return sqlite3_open(host.host.c_str(), &conn);
+	}
+
+	void CloseDB()
+	{
+		sqlite3_interrupt(conn);
+		sqlite3_close(conn);
+	}
+
+	SQLhost GetConfHost()
+	{
+		return host;
+	}
+
+	void SendResults()
+	{
+		if (results.size())
+		{
+			SQLite3Result* res = results[0];
+			if (res->GetDest())
+			{
+				res->Send();
+			}
+			else
+			{
+				/* If the client module is unloaded partway through a query then the provider will set
+				 * the pointer to NULL. We cannot just cancel the query as the result will still come
+				 * through at some point...and it could get messy if we play with invalid pointers...
+				 */
+				Instance->Log(DEBUG, "Looks like we're handling a zombie query from a module which unloaded before it got a result..fun. ID: " + ConvToStr(res->GetId()));
+				delete res;
+			}
+			results.pop_front();
+		}
+	}
+
+};
+
+
+class ModuleSQLite3 : public Module
+{
+  private:
+	ConnMap connections;
+	unsigned long currid;
+
+  public:
+	ModuleSQLite3(InspIRCd* Me)
+	: Module::Module(Me), currid(0)
+	{
+		ServerInstance->UseInterface("SQLutils");
+
+		if (!ServerInstance->PublishFeature("SQL", this))
+		{
+			throw ModuleException("m_mysql: Unable to publish feature 'SQL'");
+		}
+
+		ReadConf();
+
+		ServerInstance->PublishInterface("SQL", this);
+	}
+
+	virtual ~ModuleSQLite3()
+	{
+		ServerInstance->UnpublishInterface("SQL", this);
+		ServerInstance->UnpublishFeature("SQL");
+		ServerInstance->DoneWithInterface("SQLutils");
+	}
+
+	void Implements(char* List)
+	{
+		List[I_OnRequest] = 1;
+	}
+
+	bool HasHost(const SQLhost &host)
+	{
+		for (ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
+		{
+			if (host == iter->second->GetConfHost())
+				return true;
+		}
+		return false;
+	}
+
+	bool HostInConf(const SQLhost &h)
+	{
+		ConfigReader conf(ServerInstance);
+		for(int i = 0; i < conf.Enumerate("database"); i++)
+		{
+			SQLhost host;
+			host.id		= conf.ReadValue("database", "id", i);
+			host.host	= conf.ReadValue("database", "hostname", i);
+			host.port	= conf.ReadInteger("database", "port", i, true);
+			host.name	= conf.ReadValue("database", "name", i);
+			host.user	= conf.ReadValue("database", "username", i);
+			host.pass	= conf.ReadValue("database", "password", i);
+			host.ssl	= conf.ReadFlag("database", "ssl", "0", i);
+			if (h == host)
+				return true;
+		}
+		return false;
+	}
+
+	void ReadConf()
+	{
+		//ClearOldConnections();
+
+		ConfigReader conf(ServerInstance);
+		for(int i = 0; i < conf.Enumerate("database"); i++)
+		{
+			SQLhost host;
+
+			host.id		= conf.ReadValue("database", "id", i);
+			host.host	= conf.ReadValue("database", "hostname", i);
+			host.port	= conf.ReadInteger("database", "port", i, true);
+			host.name	= conf.ReadValue("database", "name", i);
+			host.user	= conf.ReadValue("database", "username", i);
+			host.pass	= conf.ReadValue("database", "password", i);
+			host.ssl	= conf.ReadFlag("database", "ssl", "0", i);
+
+			if (HasHost(host))
+				continue;
+
+			this->AddConn(host);
+		}
+	}
+
+	void AddConn(const SQLhost& hi)
+	{
+		if (HasHost(hi))
+		{
+			ServerInstance->Log(DEFAULT, "WARNING: A sqlite connection with id: %s already exists. Aborting database open attempt.", hi.id.c_str());
+			return;
+		}
+
+		SQLConn* newconn;
+
+		newconn = new SQLConn(ServerInstance, this, hi);
+
+		connections.insert(std::make_pair(hi.id, newconn));
+	}
+
+	virtual char* OnRequest(Request* request)
+	{
+		if(strcmp(SQLREQID, request->GetId()) == 0)
+		{
+			SQLrequest* req = (SQLrequest*)request;
+			ConnMap::iterator iter;
+			ServerInstance->Log(DEBUG, "Got query: '%s' with %d replacement parameters on id '%s'", req->query.q.c_str(), req->query.p.size(), req->dbid.c_str());
+			if((iter = connections.find(req->dbid)) != connections.end())
+			{
+				req->id = NewID();
+				req->error = iter->second->Query(*req);
+				return SQLSUCCESS;
+			}
+			else
+			{
+				req->error.Id(BAD_DBID);
+				return NULL;
+			}
+		}
+		ServerInstance->Log(DEBUG, "Got unsupported API version string: %s", request->GetId());
+		return NULL;
+	}
+
+	unsigned long NewID()
+	{
+		if (currid+1 == 0)
+			currid++;
+
+		return ++currid;
+	}
+
+	virtual Version GetVersion()
+	{
+		return Version(1,1,0,0,VF_VENDOR|VF_SERVICEPROVIDER,API_VERSION);
+	}
+
+};
+
+
+class ModuleSQLite3Factory : public ModuleFactory
+{
+  public:
+	ModuleSQLite3Factory()
+	{
+	}
+
+	~ModuleSQLite3Factory()
+	{
+	}
+
+	virtual Module * CreateModule(InspIRCd* Me)
+	{
+		return new ModuleSQLite3(Me);
+	}
+};
+
+extern "C" void * init_module( void )
+{
+	return new ModuleSQLite3Factory;
+}