<?php
/**
* Subsys_JsHttpRequest_Php: PHP backend for JavaScript DHTML loader.
* (C) 2005 Dmitry Koterov, http://forum.dklab.ru/users/DmitryKoterov/
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* See http://www.gnu.org/copyleft/lesser.html
*
* Do not remove this comment if you want to use the script!
* Не удаляйте данный комментарий, если вы хотите использовать скрипт!
*
* This backend library also supports POST requests additionally to GET.
*
* @author Dmitry Koterov
* @version 3.25
*/
class Subsys_JsHttpRequest_Php
{
var $SCRIPT_ENCODING = "windows-1251";
var $SCRIPT_DECODE_MODE = '';
var $UNIQ_HASH;
var $SCRIPT_ID;
var $LOADER = null;
var $QUOTING = null;
// Constructor.
function Subsys_JsHttpRequest_Php($enc)
{
// QUERY_STRING is in form: PHPSESSID=<sid>&a=aaa&b=bbb&<id>
// where <id> is request ID, <sid> - session ID (if present),
// PHPSESSID - session parameter name (by default = "PHPSESSID").
// Parse QUERY_STRING wrapper format.
$this->LOADER = "SCRIPT";
if (preg_match('/(\d+)((?:-\w+)?)$/s', $_SERVER['QUERY_STRING'], $m)) {
$this->SCRIPT_ID = $m[1];
// XMLHttpRequest is used if URI ends with "&".
if ($m[2] == '-xml') $this->LOADER = "XMLHttpRequest";
} else {
$this->SCRIPT_ID = 0;
}
// Start OB handling early.
$this->UNIQ_HASH = md5(microtime().getmypid());
ini_set('error_prepend_string', ini_get('error_prepend_string').$this->UNIQ_HASH);
ini_set('error_append_string', ini_get('error_append_string') .$this->UNIQ_HASH);
ob_start(array(&$this, "_obHandler"));
// Set up encoding.
$this->setEncoding($enc);
}
// Set active script encoding & correct QUERY_STRING according to it.
// Examples:
// "windows-1251" - set plain encoding (non-windows characters,
// e.g. hieroglyphs, are totally ignored)
// "windows-1251 entities" - set windows encoding, BUT additionally replace:
// "&" -> "&"
// hieroglyph -> &#XXXX; entity
function setEncoding($enc)
{
// Parse encoding.
preg_match('/^(\S*)(?:\s+(\S*))$/', $enc, $p);
$this->SCRIPT_ENCODING = strtolower(@$p[1]? $p[1] : $enc);
$this->SCRIPT_DECODE_MODE = @$p[2]? $p[2] : '';
// Manually parse QUERY_STRING because of damned Unicode's %uXXXX.
$this->_correctQueryString();
}
// Quote string according to input decoding mode.
// If entities is used (see setEncoding()), no '&' character is quoted,
// only '"', '>' and '<' (we presume than '&' is already quoted by
// input reader function).
//
// Use this function INSTEAD of htmlspecialchars() for $_GET data
// in your scripts.
function quoteInput($s)
{
if ($this->SCRIPT_DECODE_MODE == 'entities')
return str_replace(array('"', '<', '>'), array('"', '<', '>'), $s);
else
return htmlspecialchars($s);
}
// Convert PHP scalar, array or hash to JS scalar/array/hash.
function _php2js($a)
{
if (is_null($a)) return 'null';
if ($a === false) return 'false';
if ($a === true) return 'true';
if (is_scalar($a)) {
$a = addslashes($a);
$a = str_replace("\n", '\n', $a);
$a = str_replace("\r", '\r', $a);
return "'$a'";
}
$isList = true;
for ($i=0, reset($a); $i<count($a); $i++, next($a))
if (key($a) !== $i) { $isList = false; break; }
$result = array();
if ($isList) {
foreach ($a as $v) $result[] = Subsys_JsHttpRequest_Php::_php2js($v);
return '[ ' . join(',', $result) . ' ]';
} else {
foreach ($a as $k=>$v) $result[] = Subsys_JsHttpRequest_Php::_php2js($k) . ': ' . Subsys_JsHttpRequest_Php::_php2js($v);
return '{ ' . join(',', $result) . ' }';
}
}
// Parse & decode QUERY_STRING.
function _correctQueryString()
{
// ATTENTION!!!
// HTTP_RAW_POST_DATA is only accessible when Content-Type of POST request
// is NOT default "application/x-www-form-urlencoded"!!!
// Library frontend sets "application/octet-stream" for that purpose,
// see JavaScript code.
foreach (array('_GET'=>$_SERVER['QUERY_STRING'], '_POST'=>@$GLOBALS['HTTP_RAW_POST_DATA']) as $dst=>$src) {
if (isset($GLOBALS[$dst])) {
// First correct all 2-byte entities.
$s = preg_replace('/%(?!5B)(?!5D)([0-9a-f]{2})/si', '%u00\\1', $src);
// Now we can use standard parse_str() with no worry!
parse_str($s, $data);
$GLOBALS[$dst] = $this->_ucs2EntitiesDecode($data);
}
}
$_REQUEST =
(isset($_COOKIE)? $_COOKIE : array()) +
(isset($_POST)? $_POST : array()) +
(isset($_GET)? $_GET : array());
if (ini_get('register_globals')) {
// TODO?
}
}
// Called in case of error too!
function _obHandler($text)
{
// Check for error.
if (preg_match('{'.$this->UNIQ_HASH.'(.*?)'.$this->UNIQ_HASH.'}sx', $text)) {
$text = str_replace($this->UNIQ_HASH, '', $text);
$this->WAS_ERROR = 1;
}
// Content-type header.
// In XMLHttpRRequest mode we must return text/plain - damned stupid Opera 8.0. :(
Header("Content-type: " . ($this->LOADER=="SCRIPT"? "text/javascript" : "text/plain") . "; charset=" . $this->SCRIPT_ENCODING);
// Make resulting hash.
if (!isset($this->RESULT)) $this->RESULT = @$GLOBALS['_RESULT'];
$result = $this->_php2js($this->RESULT);
$text =
"// BEGIN Subsys_JsHttpRequest_Js\n" .
"Subsys_JsHttpRequest_Js.dataReady(\n" .
" " . $this->_php2js($this->SCRIPT_ID) . ", // this ID is passed from JavaScript frontend\n" .
" " . $this->_php2js(trim($text)) . ",\n" .
" " . $result . "\n" .
")\n" .
"// END Subsys_JsHttpRequest_Js\n" .
"";
// $f = fopen("debug", "w"); fwrite($f, $text); fclose($f);
return $text;
}
// Decode all %uXXXX entities in string or array (recurrent).
// String must not contain %XX entities - they are ignored!
function _ucs2EntitiesDecode($data)
{
if (is_array($data)) {
$d = array();
foreach ($data as $k=>$v) {
$d[$this->_ucs2EntitiesDecode($k)] = $this->_ucs2EntitiesDecode($v);
}
return $d;
} else {
if (strpos($data, '%u') !== false) { // improve speed
$data = preg_replace_callback('/%u([0-9A-F]{1,4})/si', array(&$this, '_ucs2EntitiesDecodeCallback'), $data);
}
return $data;
}
}
// Decode one %uXXXX entity (RE callback).
function _ucs2EntitiesDecodeCallback($p)
{
$hex = $p[1];
$dec = hexdec($hex);
if ($dec === "38" && $this->SCRIPT_DECODE_MODE == 'entities') {
// Process "&" separately in "entities" decode mode.
$c = "&";
} else {
if (is_callable('iconv')) {
$c = @iconv('UCS-2BE', $this->SCRIPT_ENCODING, pack('n', $dec));
} else {
$c = $this->_decUcs2Decode($dec, $this->SCRIPT_ENCODING);
}
if (!strlen($c)) {
if ($this->SCRIPT_DECODE_MODE == 'entities') {
$c = '&#'.$dec.';';
} else {
$c = '?';
}
}
}
return $c;
}
/**
* If there is no ICONV, try to decode 1-byte characters manually
* (for most popular charsets only).
*/
// Convert from UCS-2BE decimal to $toEnc.
function _decUcs2Decode($code, $toEnc)
{
if ($code < 128) return chr($code);
if (isset($this->_encTables[$toEnc])) {
$p = array_search($code, $this->_encTables[$toEnc]);
if ($p !== false) return chr(128 + $p);
}
return "?";
}
// UCS-2BE -> 1-byte encodings (from #128).
var $_encTables = array(
'windows-1251' => array(
0x0402, 0x0403, 0x201A, 0x0453, 0x201E, 0x2026, 0x2020, 0x2021,
0x20AC, 0x2030, 0x0409, 0x2039, 0x040A, 0x040C, 0x040B, 0x040F,
0x0452, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
0x0098, 0x2122, 0x0459, 0x203A, 0x045A, 0x045C, 0x045B, 0x045F,
0x00A0, 0x040E, 0x045E, 0x0408, 0x00A4, 0x0490, 0x00A6, 0x00A7,
0x0401, 0x00A9, 0x0404, 0x00AB, 0x00AC, 0x00AD, 0x00AE, 0x0407,
0x00B0, 0x00B1, 0x0406, 0x0456, 0x0491, 0x00B5, 0x00B6, 0x00B7,
0x0451, 0x2116, 0x0454, 0x00BB, 0x0458, 0x0405, 0x0455, 0x0457,
0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417,
0x0418, 0x0419, 0x041A, 0x041B, 0x041C, 0x041D, 0x041E, 0x041F,
0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427,
0x0428, 0x0429, 0x042A, 0x042B, 0x042C, 0x042D, 0x042E, 0x042F,
0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437,
0x0438, 0x0439, 0x043A, 0x043B, 0x043C, 0x043D, 0x043E, 0x043F,
0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447,
0x0448, 0x0449, 0x044A, 0x044B, 0x044C, 0x044D, 0x044E, 0x044F,
),
'koi8-r' => array(
0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524,
0x252C, 0x2534, 0x253C, 0x2580, 0x2584, 0x2588, 0x258C, 0x2590,
0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248,
0x2264, 0x2265, 0x00A0, 0x2321, 0x00B0, 0x00B2, 0x00B7, 0x00F7,
0x2550, 0x2551, 0x2552, 0x0451, 0x2553, 0x2554, 0x2555, 0x2556,
0x2557, 0x2558, 0x2559, 0x255A, 0x255B, 0x255C, 0x255d, 0x255E,
0x255F, 0x2560, 0x2561, 0x0401, 0x2562, 0x2563, 0x2564, 0x2565,
0x2566, 0x2567, 0x2568, 0x2569, 0x256A, 0x256B, 0x256C, 0x00A9,
0x044E, 0x0430, 0x0431, 0x0446, 0x0434, 0x0435, 0x0444, 0x0433,
0x0445, 0x0438, 0x0439, 0x043A, 0x043B, 0x043C, 0x043d, 0x043E,
0x043F, 0x044F, 0x0440, 0x0441, 0x0442, 0x0443, 0x0436, 0x0432,
0x044C, 0x044B, 0x0437, 0x0448, 0x044d, 0x0449, 0x0447, 0x044A,
0x042E, 0x0410, 0x0411, 0x0426, 0x0414, 0x0415, 0x0424, 0x0413,
0x0425, 0x0418, 0x0419, 0x041A, 0x041B, 0x041C, 0x041d, 0x041E,
0x041F, 0x042F, 0x0420, 0x0421, 0x0422, 0x0423, 0x0416, 0x0412,
0x042C, 0x042B, 0x0417, 0x0428, 0x042d, 0x0429, 0x0427, 0x042A
),
);
}
?>
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