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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 "modules/webdatabase/sqlite/SQLiteDatabase.h"
     36 #include "modules/webdatabase/sqlite/SQLiteStatement.h"
     37 #include "modules/webdatabase/DatabaseSync.h"
     38 #include "modules/webdatabase/SQLError.h"
     39 #include "modules/webdatabase/SQLResultSet.h"
     40 #include "wtf/PassRefPtr.h"
     41 #include "wtf/RefPtr.h"
     42 
     43 namespace WebCore {
     44 
     45 SQLStatementSync::SQLStatementSync(const String& statement, const Vector<SQLValue>& arguments, int permissions)
     46     : m_statement(statement)
     47     , m_arguments(arguments)
     48     , m_permissions(permissions)
     49 {
     50     ASSERT(!m_statement.isEmpty());
     51 }
     52 
     53 PassRefPtrWillBeRawPtr<SQLResultSet> SQLStatementSync::execute(DatabaseSync* db, ExceptionState& exceptionState)
     54 {
     55     db->setAuthorizerPermissions(m_permissions);
     56 
     57     SQLiteDatabase* database = &db->sqliteDatabase();
     58 
     59     SQLiteStatement statement(*database, m_statement);
     60     int result = statement.prepare();
     61     if (result != SQLResultOk) {
     62         if (result == SQLResultInterrupt)
     63             exceptionState.throwDOMException(SQLDatabaseError, "Connection to the database interrupted.");
     64         else
     65             exceptionState.throwDOMException(SyntaxError, "Could not prepare statement.");
     66         db->setLastErrorMessage("could not prepare statement", result, database->lastErrorMsg());
     67         return nullptr;
     68     }
     69 
     70     if (statement.bindParameterCount() != m_arguments.size()) {
     71         if (db->isInterrupted())
     72             exceptionState.throwDOMException(SQLDatabaseError, "Connection to the database interrupted.");
     73         else
     74             exceptionState.throwDOMException(SyntaxError, "Number of '?'s in statement string (" + String::number(statement.bindParameterCount()) + ") does not match the arguments provided (" + String::number(m_arguments.size()) + ").");
     75         db->setLastErrorMessage("number of '?'s in statement string does not match argument count");
     76         return nullptr;
     77     }
     78 
     79     for (unsigned i = 0; i < m_arguments.size(); ++i) {
     80         result = statement.bindValue(i + 1, m_arguments[i]);
     81         if (result == SQLResultFull) {
     82             exceptionState.throwDOMException(QuotaExceededError, SQLError::quotaExceededErrorMessage);
     83             db->setLastErrorMessage("there was not enough remaining storage space");
     84             return nullptr;
     85         }
     86 
     87         if (result != SQLResultOk) {
     88             exceptionState.throwDOMException(SQLDatabaseError, "Could not bind value.");
     89             db->setLastErrorMessage("could not bind value", result, database->lastErrorMsg());
     90             return nullptr;
     91         }
     92     }
     93 
     94     RefPtrWillBeRawPtr<SQLResultSet> resultSet = SQLResultSet::create();
     95 
     96     // Step so we can fetch the column names.
     97     result = statement.step();
     98     if (result == SQLResultRow) {
     99         int columnCount = statement.columnCount();
    100         SQLResultSetRowList* rows = resultSet->rows();
    101 
    102         for (int i = 0; i < columnCount; i++)
    103             rows->addColumn(statement.getColumnName(i));
    104 
    105         do {
    106             for (int i = 0; i < columnCount; i++)
    107                 rows->addResult(statement.getColumnValue(i));
    108 
    109             result = statement.step();
    110         } while (result == SQLResultRow);
    111 
    112         if (result != SQLResultDone) {
    113             exceptionState.throwDOMException(SQLDatabaseError, "Could not iterate results.");
    114             db->setLastErrorMessage("could not iterate results", result, database->lastErrorMsg());
    115             return nullptr;
    116         }
    117     } else if (result == SQLResultDone) {
    118         // Didn't find anything, or was an insert.
    119         if (db->lastActionWasInsert())
    120             resultSet->setInsertId(database->lastInsertRowID());
    121     } else if (result == SQLResultFull) {
    122         // Quota error, the delegate will be asked for more space and this statement might be re-run.
    123         exceptionState.throwDOMException(QuotaExceededError, SQLError::quotaExceededErrorMessage);
    124         db->setLastErrorMessage("there was not enough remaining storage space");
    125         return nullptr;
    126     } else if (result == SQLResultConstraint) {
    127         exceptionState.throwDOMException(ConstraintError, "A constraint was violated.");
    128         db->setLastErrorMessage("statement failed due to a constraint failure");
    129         return nullptr;
    130     } else {
    131         exceptionState.throwDOMException(SQLDatabaseError, "Could not execute statement.");
    132         db->setLastErrorMessage("could not execute statement", result, database->lastErrorMsg());
    133         return nullptr;
    134     }
    135 
    136     resultSet->setRowsAffected(database->lastChanges());
    137     return resultSet.release();
    138 }
    139 
    140 } // namespace WebCore
    141