"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 $_nonAsciiChars = ''; /** * Constructor. * * Create new JsHttpRequest backend object and attach it * to script output buffer. As a result - script will always return * correct JavaScript code, even in case of fatal errors. */ function JsHttpRequest($enc) { // QUERY_STRING is in form of: PHPSESSID=&a=aaa&b=bbb&JsHttpRequest=- // where is a request ID, is a loader name, - a session ID (if present), // PHPSESSID - session parameter name (by default = "PHPSESSID"). // 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()] ); } 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 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 = $line = null; if (headers_sent($file, $line)) { trigger_error( "HTTP headers are already sent" . ($line !== null? " in $file on line $line" : "") . ". " . "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(); } } /** * 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. $source = array( '_GET' => !empty($_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, '', $text); } // Make a resulting hash. if (!isset($this->RESULT)) { $this->RESULT = isset($GLOBALS['_RESULT'])? $GLOBALS['_RESULT'] : null; } $encoding = $this->SCRIPT_ENCODING; $result = array( 'id' => $this->ID, 'js' => $this->RESULT, 'text' => $text, ); if (function_exists('array_walk_recursive') && function_exists('iconv') && function_exists('json_encode')) { $encoding = "UTF-8"; $this->_nonAsciiChars = join("", array_map('chr', range(128, 255))); $this->_toUtfFailed = false; array_walk_recursive($result, array(&$this, '_toUtf8_callback'), $this->SCRIPT_ENCODING); if (!$this->_toUtfFailed) { // If some key contains non-ASCII character, convert everything manually. $text = json_encode($result); } else { $text = $this->php2js($result); } } else { $text = $this->php2js($result); } // Content-type header. // 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"); 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 = ''; } } 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, $fromEnc) { if ($this->_toUtfFailed || strpbrk($k, $this->_nonAsciiChars) !== false) { $this->_toUtfFailed = true; } else { $v = iconv($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 (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[$toEnc])) { // TODO: possible speedup by using array_flip($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 ), ); } ?>