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      1 /*
      2  * Copyright (C) 2007 Apple Inc. All rights reserved.
      3  * Copyright (C) 2010 Google Inc. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1.  Redistributions of source code must retain the above copyright
     10  *     notice, this list of conditions and the following disclaimer.
     11  * 2.  Redistributions in binary form must reproduce the above copyright
     12  *     notice, this list of conditions and the following disclaimer in the
     13  *     documentation and/or other materials provided with the distribution.
     14  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     15  *     its contributors may be used to endorse or promote products derived
     16  *     from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     19  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     21  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     25  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include "config.h"
     31 #include "modules/webdatabase/SQLStatementSync.h"
     32 
     33 #include "bindings/v8/ExceptionState.h"
     34 #include "core/dom/ExceptionCode.h"
     35 #include "core/platform/sql/SQLValue.h"
     36 #include "core/platform/sql/SQLiteDatabase.h"
     37 #include "core/platform/sql/SQLiteStatement.h"
     38 #include "modules/webdatabase/DatabaseSync.h"
     39 #include "modules/webdatabase/SQLError.h"
     40 #include "modules/webdatabase/SQLResultSet.h"
     41 #include "wtf/PassRefPtr.h"
     42 #include "wtf/RefPtr.h"
     43 
     44 namespace WebCore {
     45 
     46 SQLStatementSync::SQLStatementSync(const String& statement, const Vector<SQLValue>& arguments, int permissions)
     47     : m_statement(statement)
     48     , m_arguments(arguments)
     49     , m_permissions(permissions)
     50 {
     51     ASSERT(!m_statement.isEmpty());
     52 }
     53 
     54 PassRefPtr<SQLResultSet> SQLStatementSync::execute(DatabaseSync* db, ExceptionState& es)
     55 {
     56     db->setAuthorizerPermissions(m_permissions);
     57 
     58     SQLiteDatabase* database = &db->sqliteDatabase();
     59 
     60     SQLiteStatement statement(*database, m_statement);
     61     int result = statement.prepare();
     62     if (result != SQLResultOk) {
     63         if (result == SQLResultInterrupt)
     64             es.throwDOMException(SQLDatabaseError);
     65         else
     66             es.throwDOMException(SyntaxError, SQLError::syntaxErrorMessage);
     67         db->setLastErrorMessage("could not prepare statement", result, database->lastErrorMsg());
     68         return 0;
     69     }
     70 
     71     if (statement.bindParameterCount() != m_arguments.size()) {
     72         if (db->isInterrupted())
     73             es.throwDOMException(SQLDatabaseError);
     74         else
     75             es.throwDOMException(SyntaxError, SQLError::syntaxErrorMessage);
     76         db->setLastErrorMessage("number of '?'s in statement string does not match argument count");
     77         return 0;
     78     }
     79 
     80     for (unsigned i = 0; i < m_arguments.size(); ++i) {
     81         result = statement.bindValue(i + 1, m_arguments[i]);
     82         if (result == SQLResultFull) {
     83             es.throwDOMException(QuotaExceededError, SQLError::quotaExceededErrorMessage);
     84             db->setLastErrorMessage("there was not enough remaining storage space");
     85             return 0;
     86         }
     87 
     88         if (result != SQLResultOk) {
     89             es.throwDOMException(SQLDatabaseError);
     90             db->setLastErrorMessage("could not bind value", result, database->lastErrorMsg());
     91             return 0;
     92         }
     93     }
     94 
     95     RefPtr<SQLResultSet> resultSet = SQLResultSet::create();
     96 
     97     // Step so we can fetch the column names.
     98     result = statement.step();
     99     if (result == SQLResultRow) {
    100         int columnCount = statement.columnCount();
    101         SQLResultSetRowList* rows = resultSet->rows();
    102 
    103         for (int i = 0; i < columnCount; i++)
    104             rows->addColumn(statement.getColumnName(i));
    105 
    106         do {
    107             for (int i = 0; i < columnCount; i++)
    108                 rows->addResult(statement.getColumnValue(i));
    109 
    110             result = statement.step();
    111         } while (result == SQLResultRow);
    112 
    113         if (result != SQLResultDone) {
    114             es.throwDOMException(SQLDatabaseError);
    115             db->setLastErrorMessage("could not iterate results", result, database->lastErrorMsg());
    116             return 0;
    117         }
    118     } else if (result == SQLResultDone) {
    119         // Didn't find anything, or was an insert.
    120         if (db->lastActionWasInsert())
    121             resultSet->setInsertId(database->lastInsertRowID());
    122     } else if (result == SQLResultFull) {
    123         // Quota error, the delegate will be asked for more space and this statement might be re-run.
    124         es.throwDOMException(QuotaExceededError, SQLError::quotaExceededErrorMessage);
    125         db->setLastErrorMessage("there was not enough remaining storage space");
    126         return 0;
    127     } else if (result == SQLResultConstraint) {
    128         es.throwDOMException(ConstraintError, "A constraint was violated.");
    129         db->setLastErrorMessage("statement failed due to a constraint failure");
    130         return 0;
    131     } else {
    132         es.throwDOMException(SQLDatabaseError);
    133         db->setLastErrorMessage("could not execute statement", result, database->lastErrorMsg());
    134         return 0;
    135     }
    136 
    137     resultSet->setRowsAffected(database->lastChanges());
    138     return resultSet.release();
    139 }
    140 
    141 } // namespace WebCore
    142