--- /dev/null
+<?php
+/**
+ * JsHttpRequest: PHP backend for JavaScript DHTML loader.
+ * (C) Dmitry Koterov, http://en.dklab.ru
+ *
+ * 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!
+ * Íå óäàëÿéòå äàííûé êîììåíòàðèé, åñëè âû õîòèòå èñïîëüçîâàòü ñêðèïò!
+ *
+ * This backend library also supports POST requests additionally to GET.
+ *
+ * @author Dmitry Koterov
+ * @version 5.x $Id$
+ */
+
+class JsHttpRequest
+{
+ var $SCRIPT_ENCODING = "windows-1251";
+ var $SCRIPT_DECODE_MODE = '';
+ var $LOADER = null;
+ var $ID = null;
+ var $RESULT = null;
+
+ // Internal; uniq value.
+ var $_uniqHash;
+ // Magic number for display_error checking.
+ var $_magic = 14623;
+ // Previous display_errors value.
+ var $_prevDisplayErrors = null;
+ // Internal: response content-type depending on loader type.
+ var $_contentTypes = array(
+ "script" => "text/javascript",
+ "xml" => "text/plain", // In XMLHttpRequest mode we must return text/plain - stupid Opera 8.0. :(
+ "form" => "text/html",
+ "" => "text/plain", // for unknown loader
+ );
+ // Internal: conversion to UTF-8 JSON cancelled because of non-ascii key.
+ var $_toUtfFailed = false;
+ // Internal: list of characters 128...255 (for strpbrk() ASCII check).
+ var $_nonAsciiChars = '';
+ // Which Unicode conversion function is available?
+ var $_unicodeConvMethod = null;
+ // Emergency memory buffer to be freed on memory_limit error.
+ var $_emergBuffer = null;
+
+
+ /**
+ * Constructor.
+ *
+ * Create new JsHttpRequest backend object and attach it
+ * to script output buffer. As a result - script will always return
+ * correct JavaScript code, even in case of fatal errors.
+ *
+ * QUERY_STRING is in form of: PHPSESSID=<sid>&a=aaa&b=bbb&JsHttpRequest=<id>-<loader>
+ * where <id> is a request ID, <loader> is a loader name, <sid> - a session ID (if present),
+ * PHPSESSID - session parameter name (by default = "PHPSESSID").
+ *
+ * If an object is created WITHOUT an active AJAX query, it is simply marked as
+ * non-active. Use statuc method isActive() to check.
+ */
+ function JsHttpRequest($enc)
+ {
+ global $JsHttpRequest_Active;
+
+ // To be on a safe side - do not allow to drop reference counter on ob processing.
+ $GLOBALS['_RESULT'] =& $this->RESULT;
+
+ // Parse QUERY_STRING.
+ if (preg_match('/^(.*)(?:&|^)JsHttpRequest=(?:(\d+)-)?([^&]+)((?:&|$).*)$/s', @$_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'],
+ $_REQUEST['JsHttpRequest'],
+ $_GET[session_name()],
+ $_POST[session_name()],
+ $_REQUEST[session_name()]
+ );
+ // Detect Unicode conversion method.
+ $this->_unicodeConvMethod = function_exists('mb_convert_encoding')? 'mb' : (function_exists('iconv')? 'iconv' : null);
+
+ // Fill an emergency buffer. We erase it at the first line of OB processor
+ // to free some memory. This memory may be used on memory_limit error.
+ $this->_emergBuffer = str_repeat('a', 1024 * 200);
+
+ // Intercept fatal errors via display_errors (seems it is the only way).
+ $this->_uniqHash = md5('JsHttpRequest' . microtime() . getmypid());
+ $this->_prevDisplayErrors = ini_get('display_errors');
+ ini_set('display_errors', $this->_magic); //
+ ini_set('error_prepend_string', $this->_uniqHash . ini_get('error_prepend_string'));
+ ini_set('error_append_string', ini_get('error_append_string') . $this->_uniqHash);
+
+ // Start OB handling early.
+ ob_start(array(&$this, "_obHandler"));
+ $JsHttpRequest_Active = true;
+
+ // Set up the encoding.
+ $this->setEncoding($enc);
+
+ // Check if headers are already sent (see Content-Type library usage).
+ // If true - generate a debug message and exit.
+ $file = $line = null;
+ $headersSent = version_compare(PHP_VERSION, "4.3.0") < 0? headers_sent() : headers_sent($file, $line);
+ if ($headersSent) {
+ trigger_error(
+ "HTTP headers are already sent" . ($line !== null? " in $file on line $line" : " somewhere in the script") . ". "
+ . "Possibly you have an extra space (or a newline) before the first line of the script or any library. "
+ . "Please note that JsHttpRequest uses its own Content-Type header and fails if "
+ . "this header cannot be set. See header() function documentation for more details",
+ E_USER_ERROR
+ );
+ exit();
+ }
+ } else {
+ $this->ID = 0;
+ $this->LOADER = 'unknown';
+ $JsHttpRequest_Active = false;
+ }
+ }
+
+
+ /**
+ * Static function.
+ * Returns true if JsHttpRequest output processor is currently active.
+ *
+ * @return boolean True if the library is active, false otherwise.
+ */
+ function isActive()
+ {
+ return !empty($GLOBALS['JsHttpRequest_Active']);
+ }
+
+
+ /**
+ * string getJsCode()
+ *
+ * Return JavaScript part of the library.
+ */
+ function getJsCode()
+ {
+ return file_get_contents(dirname(__FILE__) . '/JsHttpRequest.js');
+ }
+
+
+ /**
+ * void setEncoding(string $encoding)
+ *
+ * Set an active script encoding & correct QUERY_STRING according to it.
+ * Examples:
+ * "windows-1251" - set plain encoding (non-windows characters,
+ * e.g. hieroglyphs, are totally ignored)
+ * "windows-1251 entities" - set windows encoding, BUT additionally replace:
+ * "&" -> "&"
+ * hieroglyph -> &#XXXX; entity
+ */
+ function setEncoding($enc)
+ {
+ // Parse an 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 a string according to the input decoding mode.
+ * If entities are used (see setEncoding()), no '&' character is quoted,
+ * only '"', '>' and '<' (we presume that '&' is already quoted by
+ * an 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 a PHP scalar, array or hash to JS scalar/array/hash. This function is
+ * an analog of json_encode(), but it can work with a non-UTF8 input and does not
+ * analyze the passed data. Output format must be fully JSON compatible.
+ *
+ * @param mixed $a Any structure to convert to JS.
+ * @return string JavaScript equivalent structure.
+ */
+ function php2js($a=false)
+ {
+ if (is_null($a)) return 'null';
+ if ($a === false) return 'false';
+ if ($a === true) return 'true';
+ if (is_scalar($a)) {
+ if (is_float($a)) {
+ // Always use "." for floats.
+ $a = str_replace(",", ".", strval($a));
+ }
+ // All scalars are converted to strings to avoid indeterminism.
+ // PHP's "1" and 1 are equal for all PHP operators, but
+ // JS's "1" and 1 are not. So if we pass "1" or 1 from the PHP backend,
+ // we should get the same result in the JS frontend (string).
+ // Character replacements for JSON.
+ static $jsonReplaces = array(
+ array("\\", "/", "\n", "\t", "\r", "\b", "\f", '"'),
+ array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"')
+ );
+ return '"' . str_replace($jsonReplaces[0], $jsonReplaces[1], $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. In PHP 5.2.2.HTTP_RAW_POST_DATA is not set sometimes;
+ // in such cases - read the POST data manually from the STDIN stream.
+ $rawPost = strcasecmp($_SERVER['REQUEST_METHOD'], 'POST') == 0? (isset($GLOBALS['HTTP_RAW_POST_DATA'])? $GLOBALS['HTTP_RAW_POST_DATA'] : @file_get_contents("php://input")) : null;
+ $source = array(
+ '_GET' => !empty($_SERVER['QUERY_STRING'])? $_SERVER['QUERY_STRING'] : null,
+ '_POST'=> $rawPost,
+ );
+ foreach ($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)
+ {
+ unset($this->_emergBuffer); // free a piece of memory for memory_limit error
+ unset($GLOBALS['JsHttpRequest_Active']);
+
+ // Check for error & fetch a resulting data.
+ if (preg_match("/{$this->_uniqHash}(.*?){$this->_uniqHash}/sx", $text, $m)) {
+ if (!ini_get('display_errors') || (!$this->_prevDisplayErrors && ini_get('display_errors') == $this->_magic)) {
+ // Display_errors:
+ // 1. disabled manually after the library initialization, or
+ // 2. was initially disabled and is not changed
+ $text = str_replace($m[0], '', $text); // strip whole error message
+ } else {
+ $text = str_replace($this->_uniqHash, '', $text);
+ }
+ }
+ if ($m && preg_match('/\bFatal error(<.*?>)?:/i', $m[1])) {
+ // On fatal errors - force null result (generate 500 error).
+ $this->RESULT = null;
+ } else {
+ // Make a resulting hash.
+ if (!isset($this->RESULT)) {
+ global $_RESULT;
+ $this->RESULT = $_RESULT;
+ }
+ }
+
+ $result = array(
+ 'id' => $this->ID,
+ 'js' => $this->RESULT,
+ 'text' => $text,
+ );
+ $text = null;
+ $encoding = $this->SCRIPT_ENCODING;
+ $status = $this->RESULT !== null? 200 : 500;
+
+ // Try to use very fast json_encode: 3-4 times faster than a manual encoding.
+ if (function_exists('array_walk_recursive') && function_exists('json_encode') && $this->_unicodeConvMethod) {
+ $this->_nonAsciiChars = join("", array_map('chr', range(128, 255)));
+ $this->_toUtfFailed = false;
+ $resultUtf8 = $result;
+ array_walk_recursive($resultUtf8, array(&$this, '_toUtf8_callback'), $this->SCRIPT_ENCODING);
+ if (!$this->_toUtfFailed) {
+ // If some key contains non-ASCII character, convert everything manually.
+ $text = json_encode($resultUtf8);
+ $encoding = "UTF-8";
+ }
+ }
+
+ // On failure, use manual encoding.
+ if ($text === null) {
+ $text = $this->php2js($result);
+ }
+
+ if ($this->LOADER != "xml") {
+ // In non-XML mode we cannot use plain JSON. So - wrap with JS function call.
+ // If top.JsHttpRequestGlobal is not defined, loading is aborted and
+ // iframe is removed, so - do not call dataReady().
+ $text = ""
+ . ($this->LOADER == "form"? 'top && top.JsHttpRequestGlobal && top.JsHttpRequestGlobal' : 'JsHttpRequest')
+ . ".dataReady(" . $text . ")\n"
+ . "";
+ if ($this->LOADER == "form") {
+ $text = '<script type="text/javascript" language="JavaScript"><!--' . "\n$text" . '//--></script>';
+ }
+
+ // Always return 200 code in non-XML mode (else SCRIPT does not work in FF).
+ // For XML mode, 500 code is okay.
+ $status = 200;
+ }
+
+ // Status header. To be safe, display it only in error mode. In case of success
+ // termination, do not modify the status (""HTTP/1.1 ..." header seems to be not
+ // too cross-platform).
+ if ($this->RESULT === null) {
+ if (php_sapi_name() == "cgi") {
+ header("Status: $status");
+ } else {
+ header("HTTP/1.1 $status");
+ }
+ }
+
+ // In XMLHttpRequest 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: $ctype; charset=$encoding");
+
+ return $text;
+ }
+
+
+ /**
+ * Internal function, used in array_walk_recursive() before json_encode() call.
+ * If a key contains non-ASCII characters, this function sets $this->_toUtfFailed = true,
+ * becaues array_walk_recursive() cannot modify array keys.
+ */
+ function _toUtf8_callback(&$v, $k, $fromEnc)
+ {
+ if ($v === null || is_bool($v)) return;
+ if ($this->_toUtfFailed || !is_scalar($v) || strpbrk($k, $this->_nonAsciiChars) !== false) {
+ $this->_toUtfFailed = true;
+ } else {
+ $v = $this->_unicodeConv($fromEnc, 'UTF-8', $v);
+ }
+ }
+
+
+ /**
+ * Decode all %uXXXX entities in string or array (recurrent).
+ * String must not contain %XX entities - they are ignored!
+ */
+ function _ucs2EntitiesDecode($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.
+ $c = "&";
+ } else {
+ if ($this->_unicodeConvMethod) {
+ $c = @$this->_unicodeConv('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 $c;
+ }
+
+
+ /**
+ * Wrapper for iconv() or mb_convert_encoding() functions.
+ * This function will generate fatal error if none of these functons available!
+ *
+ * @see iconv()
+ */
+ function _unicodeConv($fromEnc, $toEnc, $v)
+ {
+ if ($this->_unicodeConvMethod == 'iconv') {
+ return iconv($fromEnc, $toEnc, $v);
+ }
+ return mb_convert_encoding($v, $toEnc, $fromEnc);
+ }
+
+
+ /**
+ * 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[$toEnc])) {
+ // TODO: possible speedup by using array_flip($this->_encTables) and later hash access in the constructor.
+ $p = array_search($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
+ ),
+ );
+}
projects / fa-stable.git / commitdiff