diff options
Diffstat (limited to 'includes/pear/HTTP/Download/PgLOB.php')
| -rw-r--r-- | includes/pear/HTTP/Download/PgLOB.php | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/includes/pear/HTTP/Download/PgLOB.php b/includes/pear/HTTP/Download/PgLOB.php new file mode 100644 index 0000000..d1c989e --- /dev/null +++ b/includes/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; + } + } + /**#@-*/ +} + +?> |