<?php
/**
* JsHttpRequest: 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 4.19
*/
class JsHttpRequest
{
var $SCRIPT_ENCODING = "windows-1251";
var $SCRIPT_DECODE_MODE = '';
var $LOADER = null;
var $ID = null;
// Internal; uniq value.
var $_uniqHash;
// Internal: response content-type depending on loader type.
var $_contentTypes = array(
"script" => "text/javascript",
"xml" => "text/plain",
"form" => "text/html",
"" => "text/plain", // for unknown loader
);
/**
* Constructor.
*
* Create new JsHttpRequest backend object and attach it
* to script output buffer. As a result - script will always return
* correct JavaScript code, even in case of fatal errors.
*/
function JsHttpRequest($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.
if (preg_match('/^(.*)(?:&|^)JsHttpRequest=(\d+)-([^&]+)((?:&|$).*)$/s', $_SERVER['QUERY_STRING'], $m)) {
$this->ID = $m[2];
$this->LOADER = strtolower($m[3]);
$_SERVER['QUERY_STRING'] = preg_replace('/^&/s', '', preg_replace('/(^|&)'.session_name().'=[^&]*&?/s', '&', $m[1] . $m[4]));
unset($_GET['JsHttpRequest']);
unset($_REQUEST['JsHttpRequest']);
} else {
$this->ID = 0;
$this->LOADER = 'unknown';
}
// Start OB handling early.
$this->_uniqHash = md5(microtime() . getmypid());
ini_set('error_prepend_string', ini_get('error_prepend_string') . $this->_uniqHash);
ini_set('error_append_string', ini_get('error_append_string') . $this->_uniqHash);
ob_start(array(&$this, "_obHandler"));
// Set up encoding.
$this->setEncoding($enc);
// Check if headers are already sent (see Content-Type library usage).
// If true - generate debug message and exit.
$file = $line = null;
if (headers_sent($file, $line)) {
trigger_error(
"HTTP headers are already sent" . ($line !== null? " in $file on line $line" : "") . ". "
. "Possibly you have extra spaces (or newlines) before first line of the script or any library. "
. "Please note that Subsys_JsHttpRequest uses its own Content-Type header and fails if "
. "this header cannot be set. See header() function documentation for details",
E_USER_ERROR
);
exit();
}
}
/**
* string getJsCode()
*
* Return JavaScript part of library.
*/
function getJsCode()
{
return file_get_contents(dirname(__FILE__).'/JsHttpRequest.js');
}
/**
* void setEncoding(string $encoding)
*
* Set active script encoding & correct QUERY_STRING according to it.
* Examples:
* "windows-1251" - set plain encoding (non-windows characters,
* e.g. hieroglyphs, are totally ignored)
* "windows-1251 entities" - set windows encoding, BUT additionally replace:
* "&" -> "&"
* hieroglyph -> &#XXXX; entity
*/
function setEncoding($enc)
{
// Parse encoding.
preg_match('/^(\S*)(?:\s+(\S*))$/', $enc, $p);
$this->SCRIPT_ENCODING = strtolower(!empty($p[1])? $p[1] : $enc);
$this->SCRIPT_DECODE_MODE = !empty($p[2])? $p[2] : '';
// Manually parse QUERY_STRING because of damned Unicode's %uXXXX.
$this->_correctSuperglobals();
}
/**
* string quoteInput(string $input)
*
* 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);
$a = preg_replace('{(</)(script)}i', "$1'+'$2", $a); // for FORM loader
return "'$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) $result[] = JsHttpRequest::php2js($v);
return '[ ' . join(', ', $result) . ' ]';
} else {
foreach ($a as $k=>$v) $result[] = JsHttpRequest::php2js($k) . ': ' . JsHttpRequest::php2js($v);
return '{ ' . join(', ', $result) . ' }';
}
}
/**
* Internal methods.
*/
/**
* Parse & decode QUERY_STRING.
*/
function _correctSuperglobals()
{
// In case of FORM loader we may go to nirvana, everything is already parsed by PHP.
if ($this->LOADER == 'form') return;
// 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.
$source = array(
'_GET' => !empty($_SERVER['QUERY_STRING'])? $_SERVER['QUERY_STRING'] : null,
'_POST'=> !empty($GLOBALS['HTTP_RAW_POST_DATA'])? $GLOBALS['HTTP_RAW_POST_DATA'] : null
);
foreach ($source as $dst=>$src) {
// 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!
$data = null;
parse_str($s, $data);
$GLOBALS[$dst] = $this->_ucs2EntitiesDecode($data);
}
$GLOBALS['HTTP_GET_VARS'] = $_GET; // deprecated vars
$GLOBALS['HTTP_POST_VARS'] = $_POST;
$_REQUEST =
(isset($_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('{'.$this->_uniqHash.'(.*?)'.$this->_uniqHash.'}sx', $text)) {
$text = str_replace($this->_uniqHash, '', $text);
}
// Content-type header.
// In XMLHttpRRequest mode we must return text/plain - damned stupid Opera 8.0. :(
$ctype = !empty($this->_contentTypes[$this->LOADER])? $this->_contentTypes[$this->LOADER] : $this->_contentTypes[''];
header("Content-type: $ctype; charset={$this->SCRIPT_ENCODING}");
// Make resulting hash.
if (!isset($this->RESULT)) $this->RESULT = isset($GLOBALS['_RESULT'])? $GLOBALS['_RESULT'] : null;
$result = $this->php2js($this->RESULT);
$jsWindow = $ctype == "text/html"? 'parent.' : '';
$text =
"// BEGIN JsHttpRequest\n" .
"{$jsWindow}JsHttpRequest.dataReady(\n" .
" " . $this->php2js($this->ID) . ", // this ID is passed from JavaScript frontend\n" .
" " . $this->php2js(trim($text)) . ",\n" .
" " . $result . "\n" .
")\n" .
"// END JsHttpRequest\n" .
"";
if ($jsWindow) {
$text = '<script type="text/javascript" language="JavaScript"><!--' . "\n$text" . '//--></script>';
}
// $f = fopen("/debug", "w"); fwrite($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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