TimeTrex Community Edition v16.2.0

classes/pear/HTTP/Download/PgLOB.php

@@ -0,0 +1,177 @@
+<?php
+/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
+
+/**
+ * HTTP::Download::PgLOB
+ * 
+ * PHP versions 4 and 5
+ *
+ * @category   HTTP
+ * @package    HTTP_Download
+ * @author     Michael Wallner <mike@php.net>
+ * @copyright  2003-2005 Michael Wallner
+ * @license    BSD, revised
+ * @version    CVS: $Id: PgLOB.php 304423 2010-10-15 13:36:46Z clockwerx $
+ * @link       http://pear.php.net/package/HTTP_Download
+ */
+
+$GLOBALS['_HTTP_Download_PgLOB_Connection'] = null;
+stream_register_wrapper('pglob', 'HTTP_Download_PgLOB');
+
+/**
+ * PgSQL large object stream interface for HTTP_Download
+ * 
+ * Usage:
+ * <code>
+ * require_once 'HTTP/Download.php';
+ * require_once 'HTTP/Download/PgLOB.php';
+ * $db = &DB::connect('pgsql://user:pass@host/db');
+ * // or $db = pg_connect(...);
+ * $lo = HTTP_Download_PgLOB::open($db, 12345);
+ * $dl = &new HTTP_Download;
+ * $dl->setResource($lo);
+ * $dl->send()
+ * </code>
+ * 
+ * @access  public
+ * @version $Revision: 304423 $
+ */
+class HTTP_Download_PgLOB
+{
+    /**
+     * Set Connection
+     * 
+     * @static
+     * @access  public
+     * @return  bool
+     * @param   mixed   $conn
+     */
+    function setConnection($conn)
+    {
+        if (is_a($conn, 'DB_Common')) {
+            $conn = $conn->dbh;
+        } elseif (  is_a($conn, 'MDB_Common') || 
+                    is_a($conn, 'MDB2_Driver_Common')) {
+            $conn = $conn->connection;
+        }
+        if ($isResource = is_resource($conn)) {
+            $GLOBALS['_HTTP_Download_PgLOB_Connection'] = $conn;
+        }
+        return $isResource;
+    }
+    
+    /**
+     * Get Connection
+     * 
+     * @static
+     * @access  public
+     * @return  resource
+     */
+    function getConnection()
+    {
+        if (is_resource($GLOBALS['_HTTP_Download_PgLOB_Connection'])) {
+            return $GLOBALS['_HTTP_Download_PgLOB_Connection'];
+        }
+        return null;
+    }
+    
+    /**
+     * Open
+     * 
+     * @static
+     * @access  public
+     * @return  resource
+     * @param   mixed   $conn
+     * @param   int     $loid
+     * @param   string  $mode
+     */
+    function open($conn, $loid, $mode = 'rb')
+    {
+        HTTP_Download_PgLOB::setConnection($conn);
+        return fopen('pglob:///'. $loid, $mode);
+    }
+    
+    /**#@+
+     * Stream Interface Implementation
+     * @internal
+     */
+    var $ID = 0;
+    var $size = 0;
+    var $conn = null;
+    var $handle = null;
+    
+    function stream_open($path, $mode)
+    {
+        if (!$this->conn = HTTP_Download_PgLOB::getConnection()) {
+            return false;
+        }
+        if (!preg_match('/(\d+)/', $path, $matches)) {
+            return false;
+        }
+        $this->ID = $matches[1];
+        
+        if (!pg_query($this->conn, 'BEGIN')) {
+            return false;
+        }
+        
+        $this->handle = pg_lo_open($this->conn, $this->ID, $mode);
+        if (!is_resource($this->handle)) {
+            return false;
+        }
+        
+        // fetch size of lob
+        pg_lo_seek($this->handle, 0, PGSQL_SEEK_END);
+        $this->size = (int) pg_lo_tell($this->handle);
+        pg_lo_seek($this->handle, 0, PGSQL_SEEK_SET);
+        
+        return true;
+    }
+    
+    function stream_read($length)
+    {
+        return pg_lo_read($this->handle, $length);
+    }
+    
+    function stream_seek($offset, $whence = SEEK_SET)
+    {
+        return pg_lo_seek($this->handle, $offset, $whence);
+    }
+    
+    function stream_tell()
+    {
+        return pg_lo_tell($this->handle);
+    }
+    
+    function stream_eof()
+    {
+        return pg_lo_tell($this->handle) >= $this->size;
+    }
+    
+    function stream_flush()
+    {
+        return true;
+    }
+    
+    function stream_stat()
+    {
+        return array('size' => $this->size, 'ino' => $this->ID);
+    }
+    
+    function stream_write($data)
+    {
+        return pg_lo_write($this->handle, $data);
+    }
+    
+    function stream_close()
+    {
+        if (pg_lo_close($this->handle)) {
+            return pg_query($this->conn, 'COMMIT');
+        } else {
+            pg_query($this->conn ,'ROLLBACK');
+            return false;
+        }
+    }
+    /**#@-*/
+}
+
+?>