/components/pomm/libs/js/JsHttpRequest/Php.php

<?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!

 * ?? ????€??? ?????? ???????????, ???? ?? ?????? ???????????? ??????!

 *

 * This backend library also supports POST requests additionally to GET.

 *

 * @author Dmitry Koterov

 * @version 3.35

 */



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.

   *

   * Create new Subsys_JsHttpRequest_Php 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 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);



    // 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__).'/Js.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:

   *                             "&"         ->  "&amp;"

   *                             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();

  }





  /**

   * 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('&quot;', '&lt;', '&gt;'), $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)

        $result[] = Subsys_JsHttpRequest_Php::php2js($v);

      return '[ ' . join(',', $result) . ' ]';

    }

    else

    {

      foreach ($a as $k=>$v)

        $result[] = Subsys_JsHttpRequest_Php::php2js($k) . ': ' . Subsys_JsHttpRequest_Php::php2js($v);

      return '{ ' . join(',', $result) . ' }';

    }

  }





  /**

   * Internal methods.

   */



  /**

   * 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!

        $data = null;

        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 = "&amp;";

    }

    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

    ),

  );

}



?>