Fixed the error in Issue 570 (#952)

source/shared/core_stream.cpp

@@ -89,7 +89,8 @@ size_t sqlsrv_stream_read( _Inout_ php_stream* stream, _Out_writes_bytes_(count)
                 break;
         }
 
-        SQLRETURN r = SQLGetData( ss->stmt->handle(), ss->field_index + 1, c_type, get_data_buffer, count /*BufferLength*/, &read );
+        // Warnings will be handled below
+        SQLRETURN r = ss->stmt->current_results->get_data(ss->field_index + 1, c_type, get_data_buffer, count /*BufferLength*/, &read, false /*handle_warning*/ TSRMLS_CC);
 
         CHECK_SQL_ERROR( r, ss->stmt ) {
             stream->eof = 1; 

test/functional/sqlsrv/srv_570_fetch_varbinary.phpt

@@ -0,0 +1,143 @@
+--TEST--
+GitHub issue #570 - fetching a varbinary field as a stream using client buffer
+--DESCRIPTION--
+Verifies that a varbinary field (with size or max) can be successfully fetched even when a client buffer is used. There is no more "Invalid cursor state" error.
+--ENV--
+PHPT_EXEC=true
+--SKIPIF--
+<?php require('skipif.inc'); ?>
+--FILE--
+<?php
+
+function compareStreams($input, $result)
+{
+    while (($line1 = fread($input, 80)) && ($line2 = fread($result, 80))) {
+        if ($line1 != $line2) {
+            echo "Stream not identical\n";
+            break;
+        }
+    }
+}
+
+function fetchData($stmt, $data, $buffered)
+{
+    if ($buffered) {
+        $result = sqlsrv_fetch($stmt, SQLSRV_SCROLL_FIRST);
+    } else {
+        $result = sqlsrv_fetch($stmt);
+    }
+    if ($result === false) {
+        fatalError('Error when fetching data');
+    }
+
+    // Get image data as a binary stream
+    $image = sqlsrv_get_field($stmt, 0, SQLSRV_PHPTYPE_STREAM(SQLSRV_ENC_BINARY));
+    if ($image === false) {
+        fatalError('Error in calling sqlsrv_get_field');
+    }
+
+    // Does the retrieved stream match with the original?
+    compareStreams($data, $image);
+
+    fclose($image);
+}
+
+function runQuery($conn, $data, $tsql, $buffered, $prepared)
+{
+    if ($prepared) {
+        if ($buffered) {
+            // Pick a random size for the buffer large enough for this test
+            $stmt = sqlsrv_prepare($conn, $tsql, array(), array("Scrollable" => SQLSRV_CURSOR_CLIENT_BUFFERED, "ClientBufferMaxKBSize" => 51200));
+        } else {
+            $stmt = sqlsrv_prepare($conn, $tsql);
+        }
+        if ($stmt === false) {
+            fatalError("Error in preparing the query ($buffered).");
+        }
+        
+        $result = sqlsrv_execute($stmt);
+        if ($result === false) {
+            fatalError("Error in executing the query ($buffered).");
+        }
+    } else {
+        if ($buffered) {
+            // Use the default buffer size in this case
+            $stmt = sqlsrv_query($conn, $tsql, array(), array("Scrollable"=>SQLSRV_CURSOR_CLIENT_BUFFERED));
+        } else {
+            $stmt = sqlsrv_query($conn, $tsql);
+        }
+    
+        if ($stmt === false) {
+            fatalError("Error in sqlsrv_query ($buffered).");
+        }
+    }
+    
+    fetchData($stmt, $data, $buffered);
+}
+
+function runTest($conn, $columnType, $path)
+{
+    $tableName = 'srvTestTable_570' . rand(0, 10);
+    dropTable($conn, $tableName);
+    
+    // Create the test table with only one column
+    $tsql = "CREATE TABLE $tableName([picture] $columnType NOT NULL)";
+    $stmt = sqlsrv_query($conn, $tsql);
+    if (!$stmt) {
+        fatalError("Failed to create table $tableName\n");
+    }
+
+    // Insert php.gif as stream data
+    $tsql = "INSERT INTO $tableName (picture) VALUES (?)";
+    
+    $data = fopen($path, 'rb');
+    if (!$data) {
+        fatalError('Could not open image for reading.');
+    }
+
+    $params = array($data, SQLSRV_PARAM_IN, SQLSRV_PHPTYPE_STREAM(SQLSRV_ENC_BINARY));
+    $stmt = sqlsrv_query($conn, $tsql, array($params));
+    if ($stmt === false) {
+        fatalError("Failed to insert image into $tableName");
+    }
+    do {
+        $read = sqlsrv_send_stream_data($stmt);
+    } while ($read);
+    sqlsrv_free_stmt($stmt);
+
+    // Start testing, with or without client buffer, using prepared statement or direct query
+    $tsql = "SELECT picture FROM $tableName";
+    runQuery($conn, $data, $tsql, false, true);
+    runQuery($conn, $data, $tsql, true, true);
+    runQuery($conn, $data, $tsql, false, false);
+    runQuery($conn, $data, $tsql, true, false);
+    
+    // Clean up
+    fclose($data);
+
+    dropTable($conn, $tableName);
+}
+
+require_once('MsCommon.inc');
+
+$conn = connect();
+if ($conn === false) {
+    die(print_r(sqlsrv_errors(), true));
+}
+
+if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
+    $pic = '\\php.gif';
+} else { // other than Windows
+    $pic = '/php.gif';
+}
+$path = dirname($_SERVER['PHP_SELF']) . $pic;
+
+runTest($conn, 'VARBINARY(MAX)', $path);
+runTest($conn, 'VARBINARY(4096)', $path);
+
+echo "Done\n";
+
+sqlsrv_close($conn);
+?>
+--EXPECT--
+Done