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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* @package BLOBStreaming
*/
function initPBMSDatabase()
{
$query = "create database IF NOT EXISTS pbms;"; // If no other choice then try this.
/*
* The user may not have privileges to create the 'pbms' database
* so if it doesn't exist then we perform a select on a pbms system
* table in an already existing database which will cause the PBMS
* daemon to create the 'pbms' database.
*/
$db_array = PMA_DBI_fetch_result('SHOW DATABASES;');
if (! empty($db_array)) {
$target = "";
foreach ($db_array as $current_db) {
if ($current_db == 'pbms') {
return TRUE;
}
if ($target == "") {
if (($current_db != 'pbxt') && ($current_db != 'mysql') && ($current_db != 'information_schema')) {
$target = $current_db;
}
}
}
if ($target != "") {
$query = "select * from $target.pbms_metadata_header"; // If it exists this table will not contain much
}
}
$result = PMA_DBI_query($query );
if (! $result) {
return FALSE;
}
return TRUE;
}
/**
* checks whether the necessary plugins for BLOBStreaming exist
*
* @access public
* @uses PMA_Config::get()
* @uses PMA_Config::settings()
* @uses PMA_Config::set()
* @uses PMA_BS_GetVariables()
* @uses PMA_cacheSet()
* @uses PMA_cacheGet()
* @return boolean
*/
function checkBLOBStreamingPlugins()
{
// load PMA configuration
$PMA_Config = $GLOBALS['PMA_Config'];
// return if unable to load PMA configuration
if (empty($PMA_Config)) {
return FALSE;
}
// If we don't know that we can skip blobstreaming, we continue
// verifications; anyway, in case we won't skip blobstreaming,
// we still need to set some variables in non-persistent settings,
// which is done via $PMA_Config->set().
/** Retrieve current server configuration;
* at this point, $PMA_Config->get('Servers') contains the server parameters
* as explicitely defined in config.inc.php, so it cannot be used; it's
* better to use $GLOBALS['cfg']['Server'] which contains the explicit
* parameters merged with the default ones
*
*/
$serverCfg = $GLOBALS['cfg']['Server'];
// return if unable to retrieve current server configuration
if (! $serverCfg) {
return FALSE;
}
// if PHP extension in use is 'mysql', specify element 'PersistentConnections'
if ($serverCfg['extension'] == "mysql") {
$serverCfg['PersistentConnections'] = $PMA_Config->settings['PersistentConnections'];
}
// if connection type is TCP, unload socket variable
if (strtolower($serverCfg['connect_type']) == "tcp") {
$serverCfg['socket'] = "";
}
$has_blobstreaming = false;
if (PMA_MYSQL_INT_VERSION >= 50109) {
// Retrieve MySQL plugins
$existing_plugins = PMA_DBI_fetch_result('SHOW PLUGINS');
foreach ($existing_plugins as $one_existing_plugin) {
// check if required plugins exist
if ( strtolower($one_existing_plugin['Library']) == 'libpbms.so'
&& $one_existing_plugin['Status'] == "ACTIVE") {
$has_blobstreaming = true;
break;
}
}
unset($existing_plugins, $one_existing_plugin);
}
// set variable indicating BS plugin existence
$PMA_Config->set('BLOBSTREAMING_PLUGINS_EXIST', $has_blobstreaming);
if ($has_blobstreaming) {
$bs_variables = PMA_BS_GetVariables();
// if no BS variables exist, set plugin existence to false and return
if (count($bs_variables) <= 0) {
$PMA_Config->set('BLOBSTREAMING_PLUGINS_EXIST', FALSE);
PMA_cacheSet('skip_blobstreaming', true, true);
return FALSE;
} // end if (count($bs_variables) <= 0)
// Check that the required pbms functions exist:
if ((function_exists("pbms_connect") == FALSE) ||
(function_exists("pbms_error") == FALSE) ||
(function_exists("pbms_close") == FALSE) ||
(function_exists("pbms_is_blob_reference") == FALSE) ||
(function_exists("pbms_get_info") == FALSE) ||
(function_exists("pbms_get_metadata_value") == FALSE) ||
(function_exists("pbms_add_metadata") == FALSE) ||
(function_exists("pbms_read_stream") == FALSE)) {
// We should probably notify the user that they need to install
// the pbms client lib and PHP extension to make use of blob streaming.
$PMA_Config->set('BLOBSTREAMING_PLUGINS_EXIST', FALSE);
PMA_cacheSet('skip_blobstreaming', true, true);
return FALSE;
}
if (function_exists("pbms_connection_pool_size")) {
if ( isset($PMA_Config->settings['pbms_connection_pool_size'])) {
$pool_size = $PMA_Config->settings['pbms_connection_pool_size'];
if ($pool_size == "") {
$pool_size = 1;
}
} else {
$pool_size = 1;
}
pbms_connection_pool_size($pool_size);
}
// get BS server port
$BS_PORT = $bs_variables['pbms_port'];
// if no BS server port or 'pbms' database exists, set plugin existance to false and return
if ((! $BS_PORT) || (! initPBMSDatabase())) {
$PMA_Config->set('BLOBSTREAMING_PLUGINS_EXIST', FALSE);
PMA_cacheSet('skip_blobstreaming', true, true);
return FALSE;
} // end if (!$BS_PORT)
// Ping PBMS: the database doesn't need to exist for this to work.
if (pbms_connect($serverCfg['host'], $BS_PORT, "anydb") == FALSE) {
$PMA_Config->set('BLOBSTREAMING_PLUGINS_EXIST', FALSE);
PMA_cacheSet('skip_blobstreaming', true, true);
return FALSE;
}
pbms_close();
if (function_exists("pbms_pconnect")) {
$PMA_Config->set('PBMS_PCONNECT_EXISTS', TRUE);
} else {
$PMA_Config->set('PBMS_PCONNECT_EXISTS', FALSE);
}
// add selected BS, CURL and fileinfo library variables to PMA configuration
$PMA_Config->set('BLOBSTREAMING_PORT', $BS_PORT);
$PMA_Config->set('BLOBSTREAMING_HOST', $serverCfg['host']);
$PMA_Config->set('BLOBSTREAMING_SERVER', $serverCfg['host'] . ':' . $BS_PORT);
$PMA_Config->set('PHP_PBMS_EXISTS', FALSE);
$PMA_Config->set('FILEINFO_EXISTS', FALSE);
// check if PECL's fileinfo library exist
$finfo = NULL;
if (function_exists("finfo_open")) {
$finfo = finfo_open(FILEINFO_MIME);
}
// fileinfo library exists, set necessary variable and close resource
if (! empty($finfo)) {
$PMA_Config->set('FILEINFO_EXISTS', TRUE);
finfo_close($finfo);
} // end if (!empty($finfo))
} else {
PMA_cacheSet('skip_blobstreaming', true, true);
return FALSE;
} // end if ($has_blobstreaming)
return TRUE;
}
/**
* returns a list of BLOBStreaming variables used by MySQL
*
* @access public
* @uses PMA_Config::get()
* @uses PMA_DBI_query()
* @uses PMA_DBI_fetch_assoc()
* @return array - list of BLOBStreaming variables
*/
function PMA_BS_GetVariables()
{
// load PMA configuration
$PMA_Config = $GLOBALS['PMA_Config'];
// return if unable to load PMA configuration
if (empty($PMA_Config))
return NULL;
// run query to retrieve BS variables
$query = "SHOW VARIABLES LIKE '%pbms%'";
$result = PMA_DBI_query($query);
$BS_Variables = array();
// while there are records to retrieve
while ($data = @PMA_DBI_fetch_assoc($result))
$BS_Variables[$data['Variable_name']] = $data['Value'];
// return BS variables
return $BS_Variables;
}
//========================
//========================
function PMA_BS_ReportPBMSError($msg)
{
$tmp_err = pbms_error();
PMA_showMessage(__('PBMS error') . " $msg $tmp_err");
}
//------------
function PMA_do_connect($db_name, $quiet)
{
$PMA_Config = $GLOBALS['PMA_Config'];
// return if unable to load PMA configuration
if (empty($PMA_Config)) {
return FALSE;
}
// generate bs reference link
$pbms_host = $PMA_Config->get('BLOBSTREAMING_HOST');
$pbms_port = $PMA_Config->get('BLOBSTREAMING_PORT');
if ($PMA_Config->get('PBMS_PCONNECT_EXISTS')) {
// Open a persistent connection.
$ok = pbms_pconnect($pbms_host, $pbms_port, $db_name);
} else {
$ok = pbms_connect($pbms_host, $pbms_port, $db_name);
}
if ($ok == FALSE) {
if ($quiet == FALSE) {
PMA_BS_ReportPBMSError(__('PBMS connection failed:') . " pbms_connect($pbms_host, $pbms_port, $db_name)");
}
return FALSE;
}
return TRUE;
}
//------------
function PMA_do_disconnect()
{
pbms_close();
}
//------------
/**
* checks whether the BLOB reference looks valid
*
*/
function PMA_BS_IsPBMSReference($bs_reference, $db_name)
{
if (PMA_cacheGet('skip_blobstreaming', true)) {
return FALSE;
}
// You do not really need a connection to the PBMS Daemon
// to check if a reference looks valid but unfortunalty the API
// requires one at this point so until the API is updated
// we need to epen one here. If you use pool connections this
// will not be a performance problem.
if (PMA_do_connect($db_name, FALSE) == FALSE) {
return FALSE;
}
$ok = pbms_is_blob_reference($bs_reference);
return $ok ;
}
//------------
function PMA_BS_CreateReferenceLink($bs_reference, $db_name)
{
if (PMA_do_connect($db_name, FALSE) == FALSE) {
return __('Error');
}
if (pbms_get_info(trim($bs_reference)) == FALSE) {
PMA_BS_ReportPBMSError(__('PBMS get BLOB info failed:') . " pbms_get_info($bs_reference)");
PMA_do_disconnect();
return __('Error');
}
$content_type = pbms_get_metadata_value("Content-Type");
if ($content_type == FALSE) {
$br = trim($bs_reference);
PMA_BS_ReportPBMSError("PMA_BS_CreateReferenceLink('$br', '$db_name'): " . __('get BLOB Content-Type failed'));
}
PMA_do_disconnect();
if (! $content_type) {
$content_type = "image/jpeg";
}
$bs_url = PMA_BS_getURL($bs_reference);
if (empty($bs_url)) {
PMA_BS_ReportPBMSError(__('No blob streaming server configured!'));
return 'Error';
}
//$output = "<a href=\"#\" onclick=\"requestMIMETypeChange('" . urlencode($db_name) . "', '" . urlencode($GLOBALS['table']) . "', '" . urlencode($bs_reference) . "', '" . urlencode($content_type) . "')\">$content_type</a>";
$output = $content_type;
// specify custom HTML for various content types
switch ($content_type) {
// no content specified
case NULL:
$output = "NULL";
break;
// image content
case 'image/jpeg':
case 'image/png':
$output .= ' (<a href="' . $bs_url . '" target="new">' . __('View image') . '</a>)';
break;
// audio content
case 'audio/mpeg':
$output .= ' (<a href="#" onclick="popupBSMedia(\'' . PMA_generate_common_url() . '\',\'' . urlencode($bs_reference) . '\', \'' . urlencode($content_type) . '\',' . ($is_custom_type ? 1 : 0) . ', 640, 120)">' . __('Play audio'). '</a>)';
break;
// video content
case 'application/x-flash-video':
case 'video/mpeg':
$output .= ' (<a href="#" onclick="popupBSMedia(\'' . PMA_generate_common_url() . '\',\'' . urlencode($bs_reference) . '\', \'' . urlencode($content_type) . '\',' . ($is_custom_type ? 1 : 0) . ', 640, 480)">' . __('View video') . '</a>)';
break;
// unsupported content. specify download
default:
$output .= ' (<a href="' . $bs_url . '" target="new">' . __('Download file'). '</a>)';
}
return $output;
}
//------------
// In the future there may be server variables to turn on/off PBMS
// BLOB streaming on a per table or database basis. So in anticipation of this
// PMA_BS_IsTablePBMSEnabled() passes in the table and database name even though
// they are not currently needed.
function PMA_BS_IsTablePBMSEnabled($db_name, $tbl_name, $tbl_type)
{
if (PMA_cacheGet('skip_blobstreaming', true)) {
return FALSE;
}
if ((isset($tbl_type) == FALSE) || (strlen($tbl_type) == 0)) {
return FALSE;
}
// load PMA configuration
$PMA_Config = $GLOBALS['PMA_Config'];
// return if unable to load PMA configuration
if (empty($PMA_Config)) {
return FALSE;
}
if (! $PMA_Config->get('BLOBSTREAMING_PLUGINS_EXIST')) {
return FALSE;
}
// This information should be cached rather than selecting it each time.
//$query = "SELECT count(*) FROM information_schema.TABLES T, pbms.pbms_enabled E where T.table_schema = ". PMA_backquote($db_name) . " and T.table_name = ". PMA_backquote($tbl_name) . " and T.engine = E.name";
$query = "SELECT count(*) FROM pbms.pbms_enabled E where E.name = '" . PMA_sqlAddslashes($tbl_type) . "'";
$result = PMA_DBI_query($query);
$data = PMA_DBI_fetch_row($result);
if ($data[0] == 1) {
return TRUE;
}
return FALSE;
}
//------------
function PMA_BS_UpLoadFile($db_name, $tbl_name, $file_type, $file_name)
{
if (PMA_cacheGet('skip_blobstreaming', true)) {
return FALSE;
}
if (PMA_do_connect($db_name, FALSE) == FALSE) {
return FALSE;
}
$fh = fopen($file_name, 'r');
if (! $fh) {
PMA_do_disconnect();
PMA_showMessage(sprintf(__('Could not open file: %s'), $file_name));
return FALSE;
}
pbms_add_metadata("Content-Type", $file_type);
$pbms_blob_url = pbms_read_stream($fh, filesize($file_name), $tbl_name);
if (! $pbms_blob_url) {
PMA_BS_ReportPBMSError("pbms_read_stream()");
}
fclose($fh);
PMA_do_disconnect();
return $pbms_blob_url;
}
//------------
function PMA_BS_SetContentType($db_name, $bsTable, $blobReference, $contentType)
{
if (PMA_cacheGet('skip_blobstreaming', true)) {
return FALSE;
}
// This is a really ugly way to do this but currently there is nothing better.
// In a future version of PBMS the system tables will be redesigned to make this
// more efficient.
$query = "SELECT Repository_id, Repo_blob_offset FROM pbms_reference WHERE Blob_url='" . PMA_sqlAddslashes($blobReference) . "'";
//error_log(" PMA_BS_SetContentType: $query\n", 3, "/tmp/mylog");
$result = PMA_DBI_query($query);
//error_log(" $query\n", 3, "/tmp/mylog");
// if record exists
if ($data = PMA_DBI_fetch_assoc($result)) {
$where = "WHERE Repository_id=" . $data['Repository_id'] . " AND Repo_blob_offset=" . $data['Repo_blob_offset'] ;
$query = "SELECT name from pbms_metadata $where";
$result = PMA_DBI_query($query);
if (PMA_DBI_num_rows($result) == 0) {
$query = "INSERT into pbms_metadata Values( ". $data['Repository_id'] . ", " . $data['Repo_blob_offset'] . ", 'Content_type', '" . PMA_sqlAddslashes($contentType) . "')";
} else {
$query = "UPDATE pbms_metadata SET name = 'Content_type', Value = '" . PMA_sqlAddslashes($contentType) . "' $where";
}
//error_log("$query\n", 3, "/tmp/mylog");
PMA_DBI_query($query);
} else {
return FALSE;
}
return TRUE;
}
//------------
function PMA_BS_IsHiddenTable($table)
{
if ($table === 'pbms_repository' || $table === 'pbms_reference' || $table === 'pbms_metadata'
|| $table === 'pbms_metadata_header' || $table === 'pbms_dump') {
return TRUE;
}
return FALSE;
}
//------------
function PMA_BS_getURL($reference)
{
// load PMA configuration
$PMA_Config = $GLOBALS['PMA_Config'];
if (empty($PMA_Config)) {
return FALSE;
}
// retrieve BS server variables from PMA configuration
$bs_server = $PMA_Config->get('BLOBSTREAMING_SERVER');
if (empty($bs_server)) {
return FALSE;
}
$bs_url = PMA_linkURL('http://' . $bs_server . '/' . rtrim($reference));
return $bs_url;
}
?>
