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- <?php
- /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
-
- /**
- * HTTP::Header
- *
- * PHP versions 4 and 5
- *
- * @category HTTP
- * @package HTTP_Header
- * @author Wolfram Kriesing <wk@visionp.de>
- * @author Davey Shafik <davey@php.net>
- * @author Michael Wallner <mike@php.net>
- * @copyright 2003-2005 The Authors
- * @license BSD, revised
- * @version CVS: $Id: Header.php,v 1.32 2005/11/08 19:06:10 mike Exp $
- * @link http://pear.php.net/package/HTTP_Header
- */
-
- /**
- * Requires HTTP
- */
- require_once 'HTTP.php';
-
- /**#@+
- * Information Codes
- */
- define('HTTP_HEADER_STATUS_100', '100 Continue');
- define('HTTP_HEADER_STATUS_101', '101 Switching Protocols');
- define('HTTP_HEADER_STATUS_102', '102 Processing');
- define('HTTP_HEADER_STATUS_INFORMATIONAL',1);
- /**#@-*/
-
- /**#+
- * Success Codes
- */
- define('HTTP_HEADER_STATUS_200', '200 OK');
- define('HTTP_HEADER_STATUS_201', '201 Created');
- define('HTTP_HEADER_STATUS_202', '202 Accepted');
- define('HTTP_HEADER_STATUS_203', '203 Non-Authoritative Information');
- define('HTTP_HEADER_STATUS_204', '204 No Content');
- define('HTTP_HEADER_STATUS_205', '205 Reset Content');
- define('HTTP_HEADER_STATUS_206', '206 Partial Content');
- define('HTTP_HEADER_STATUS_207', '207 Multi-Status');
- define('HTTP_HEADER_STATUS_SUCCESSFUL',2);
- /**#@-*/
-
- /**#@+
- * Redirection Codes
- */
- define('HTTP_HEADER_STATUS_300', '300 Multiple Choices');
- define('HTTP_HEADER_STATUS_301', '301 Moved Permanently');
- define('HTTP_HEADER_STATUS_302', '302 Found');
- define('HTTP_HEADER_STATUS_303', '303 See Other');
- define('HTTP_HEADER_STATUS_304', '304 Not Modified');
- define('HTTP_HEADER_STATUS_305', '305 Use Proxy');
- define('HTTP_HEADER_STATUS_306', '306 (Unused)');
- define('HTTP_HEADER_STATUS_307', '307 Temporary Redirect');
- define('HTTP_HEADER_STATUS_REDIRECT',3);
- /**#@-*/
-
- /**#@+
- * Error Codes
- */
- define('HTTP_HEADER_STATUS_400', '400 Bad Request');
- define('HTTP_HEADER_STATUS_401', '401 Unauthorized');
- define('HTTP_HEADER_STATUS_402', '402 Payment Granted');
- define('HTTP_HEADER_STATUS_403', '403 Forbidden');
- define('HTTP_HEADER_STATUS_404', '404 File Not Found');
- define('HTTP_HEADER_STATUS_405', '405 Method Not Allowed');
- define('HTTP_HEADER_STATUS_406', '406 Not Acceptable');
- define('HTTP_HEADER_STATUS_407', '407 Proxy Authentication Required');
- define('HTTP_HEADER_STATUS_408', '408 Request Time-out');
- define('HTTP_HEADER_STATUS_409', '409 Conflict');
- define('HTTP_HEADER_STATUS_410', '410 Gone');
- define('HTTP_HEADER_STATUS_411', '411 Length Required');
- define('HTTP_HEADER_STATUS_412', '412 Precondition Failed');
- define('HTTP_HEADER_STATUS_413', '413 Request Entity Too Large');
- define('HTTP_HEADER_STATUS_414', '414 Request-URI Too Large');
- define('HTTP_HEADER_STATUS_415', '415 Unsupported Media Type');
- define('HTTP_HEADER_STATUS_416', '416 Requested range not satisfiable');
- define('HTTP_HEADER_STATUS_417', '417 Expectation Failed');
- define('HTTP_HEADER_STATUS_422', '422 Unprocessable Entity');
- define('HTTP_HEADER_STATUS_423', '423 Locked');
- define('HTTP_HEADER_STATUS_424', '424 Failed Dependency');
- define('HTTP_HEADER_STATUS_CLIENT_ERROR',4);
- /**#@-*/
-
- /**#@+
- * Server Errors
- */
- define('HTTP_HEADER_STATUS_500', '500 Internal Server Error');
- define('HTTP_HEADER_STATUS_501', '501 Not Implemented');
- define('HTTP_HEADER_STATUS_502', '502 Bad Gateway');
- define('HTTP_HEADER_STATUS_503', '503 Service Unavailable');
- define('HTTP_HEADER_STATUS_504', '504 Gateway Time-out');
- define('HTTP_HEADER_STATUS_505', '505 HTTP Version not supported');
- define('HTTP_HEADER_STATUS_507', '507 Insufficient Storage');
- define('HTTP_HEADER_STATUS_SERVER_ERROR',5);
- /**#@-*/
-
- /**
- * HTTP_Header
- *
- * @package HTTP_Header
- * @category HTTP
- * @access public
- * @version $Revision: 1.32 $
- */
- class HTTP_Header extends HTTP
- {
- /**
- * Default Headers
- *
- * The values that are set as default, are the same as PHP sends by default.
- *
- * @var array
- * @access private
- */
- var $_headers = array(
- 'content-type' => 'text/html',
- 'pragma' => 'no-cache',
- 'cache-control' => 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0'
- );
-
- /**
- * HTTP version
- *
- * @var string
- * @access private
- */
- var $_httpVersion = '1.0';
-
- /**
- * Constructor
- *
- * Sets HTTP version.
- *
- * @access public
- * @return object HTTP_Header
- */
- function HTTP_Header()
- {
- if (isset($_SERVER['SERVER_PROTOCOL'])) {
- $this->setHttpVersion(substr($_SERVER['SERVER_PROTOCOL'], -3));
- }
- }
-
- /**
- * Set HTTP version
- *
- * @access public
- * @return bool Returns true on success or false if version doesn't
- * match 1.0 or 1.1 (note: 1 will result in 1.0)
- * @param mixed $version HTTP version, either 1.0 or 1.1
- */
- function setHttpVersion($version)
- {
- $version = round((float) $version, 1);
- if ($version < 1.0 || $version > 1.1) {
- return false;
- }
- $this->_httpVersion = sprintf('%0.1f', $version);
- return true;
- }
-
- /**
- * Get HTTP version
- *
- * @access public
- * @return string
- */
- function getHttpVersion()
- {
- return $this->_httpVersion;
- }
-
- /**
- * Set Header
- *
- * The default value for the Last-Modified header will be current
- * date and atime if $value is omitted.
- *
- * @access public
- * @return bool Returns true on success or false if $key was empty or
- * $value was not of an scalar type.
- * @param string $key The name of the header.
- * @param string $value The value of the header. (NULL to unset header)
- */
- function setHeader($key, $value = null)
- {
- if (empty($key) || (isset($value) && !is_scalar($value))) {
- return false;
- }
-
- $key = strToLower($key);
- if ($key == 'last-modified') {
- if (!isset($value)) {
- $value = HTTP::Date(time());
- } elseif (is_numeric($value)) {
- $value = HTTP::Date($value);
- }
- }
-
- if (isset($value)) {
- $this->_headers[$key] = $value;
- } else {
- unset($this->_headers[$key]);
- }
-
- return true;
- }
-
- /**
- * Get Header
- *
- * If $key is omitted, all stored headers will be returned.
- *
- * @access public
- * @return mixed Returns string value of the requested header,
- * array values of all headers or false if header $key
- * is not set.
- * @param string $key The name of the header to fetch.
- */
- function getHeader($key = null)
- {
- if (!isset($key)) {
- return $this->_headers;
- }
-
- $key = strToLower($key);
-
- if (!isset($this->_headers[$key])) {
- return false;
- }
-
- return $this->_headers[$key];
- }
-
- /**
- * Send Headers
- *
- * Send out the header that you set via setHeader().
- *
- * @access public
- * @return bool Returns true on success or false if headers are already
- * sent.
- * @param array $keys Headers to (not) send, see $include.
- * @param array $include If true only $keys matching headers will be
- * sent, if false only header not matching $keys will be
- * sent.
- */
- function sendHeaders($keys = array(), $include = true)
- {
- if (headers_sent()) {
- return false;
- }
-
- if (count($keys)) {
- array_change_key_case($keys, CASE_LOWER);
- foreach ($this->_headers as $key => $value) {
- if ($include ? in_array($key, $keys) : !in_array($key, $keys)) {
- header($key .': '. $value);
- }
- }
- } else {
- foreach ($this->_headers as $header => $value) {
- header($header .': '. $value);
- }
- }
- return true;
- }
-
- /**
- * Send Satus Code
- *
- * Send out the given HTTP-Status code. Use this for example when you
- * want to tell the client this page is cached, then you would call
- * sendStatusCode(304).
- *
- * @see HTTP_Header_Cache::exitIfCached()
- *
- * @access public
- * @return bool Returns true on success or false if headers are already
- * sent.
- * @param int $code The status code to send, i.e. 404, 304, 200, etc.
- */
- function sendStatusCode($code)
- {
- if (headers_sent()) {
- return false;
- }
-
- if ($code == (int) $code && defined('HTTP_HEADER_STATUS_'. $code)) {
- $code = constant('HTTP_HEADER_STATUS_'. $code);
- }
-
- if (strncasecmp(PHP_SAPI, 'cgi', 3)) {
- header('HTTP/'. $this->_httpVersion .' '. $code);
- } else {
- header('Status: '. $code);
- }
- return true;
- }
-
- /**
- * Date to Timestamp
- *
- * Converts dates like
- * Mon, 31 Mar 2003 15:26:34 GMT
- * Tue, 15 Nov 1994 12:45:26 GMT
- * into a timestamp, strtotime() didn't do it in older versions.
- *
- * @deprecated Use PHPs strtotime() instead.
- * @access public
- * @return mixed Returns int unix timestamp or false if the date doesn't
- * seem to be a valid GMT date.
- * @param string $date The GMT date.
- */
- function dateToTimestamp($date)
- {
- static $months = array(
- null => 0, 'Jan' => 1, 'Feb' => 2, 'Mar' => 3, 'Apr' => 4,
- 'May' => 5, 'Jun' => 6, 'Jul' => 7, 'Aug' => 8, 'Sep' => 9,
- 'Oct' => 10, 'Nov' => 11, 'Dec' => 12
- );
-
- if (-1 < $timestamp = strToTime($date)) {
- return $timestamp;
- }
-
- if (!preg_match('~[^,]*,\s(\d+)\s(\w+)\s(\d+)\s(\d+):(\d+):(\d+).*~',
- $date, $m)) {
- return false;
- }
-
- // [0] => Mon, 31 Mar 2003 15:42:55 GMT
- // [1] => 31 [2] => Mar [3] => 2003 [4] => 15 [5] => 42 [6] => 55
- return mktime($m[4], $m[5], $m[6], $months[$m[2]], $m[1], $m[3]);
- }
-
- /**
- * Redirect
- *
- * This function redirects the client. This is done by issuing a Location
- * header and exiting. Additionally to HTTP::redirect() you can also add
- * parameters to the url.
- *
- * If you dont need parameters to be added, simply use HTTP::redirect()
- * otherwise use HTTP_Header::redirect().
- *
- * @see HTTP::redirect()
- * @author Wolfram Kriesing <wk@visionp.de>
- * @access public
- * @return void
- * @param string $url The URL to redirect to, if none is given it
- * redirects to the current page.
- * @param array $param Array of query string parameters to add; usually
- * a set of key => value pairs; if an array entry consists
- * only of an value it is used as key and the respective
- * value is fetched from $GLOBALS[$value]
- * @param bool $session Whether the session name/id should be added
- */
- function redirect($url = null, $param = array(), $session = false)
- {
- if (!isset($url)) {
- $url = $_SERVER['PHP_SELF'];
- }
-
- $qs = array();
-
- if ($session) {
- $qs[] = session_name() .'='. session_id();
- }
-
- if (is_array($param) && count($param)) {
- if (count($param)) {
- foreach ($param as $key => $val) {
- if (is_string($key)) {
- $qs[] = urlencode($key) .'='. urlencode($val);
- } else {
- $qs[] = urlencode($val) .'='. urlencode(@$GLOBALS[$val]);
- }
- }
- }
- }
-
- if ($qstr = implode('&', $qs)) {
- $purl = parse_url($url);
- $url .= (isset($purl['query']) ? '&' : '?') . $qstr;
- }
-
- parent::redirect($url);
- }
-
- /**#@+
- * @author Davey Shafik <davey@php.net>
- * @param int $http_code HTTP Code to check
- * @access public
- */
-
- /**
- * Return HTTP Status Code Type
- *
- * @return int|false
- */
- function getStatusType($http_code)
- {
- if(is_int($http_code) && defined('HTTP_HEADER_STATUS_' .$http_code) || defined($http_code)) {
- $type = substr($http_code,0,1);
- switch ($type) {
- case HTTP_HEADER_STATUS_INFORMATIONAL:
- case HTTP_HEADER_STATUS_SUCCESSFUL:
- case HTTP_HEADER_STATUS_REDIRECT:
- case HTTP_HEADER_STATUS_CLIENT_ERROR:
- case HTTP_HEADER_STATUS_SERVER_ERROR:
- return $type;
- break;
- default:
- return false;
- break;
- }
- } else {
- return false;
- }
- }
-
- /**
- * Return Status Code Message
- *
- * @return string|false
- */
- function getStatusText($http_code)
- {
- if ($this->getStatusType($http_code)) {
- if (is_int($http_code) && defined('HTTP_HEADER_STATUS_' .$http_code)) {
- return substr(constant('HTTP_HEADER_STATUS_' .$http_code),4);
- } else {
- return substr($http_code,4);
- }
- } else {
- return false;
- }
- }
-
- /**
- * Checks if HTTP Status code is Information (1xx)
- *
- * @return boolean
- */
- function isInformational($http_code)
- {
- if ($status_type = $this->getStatusType($http_code)) {
- return $status_type{0} == HTTP_HEADER_STATUS_INFORMATIONAL;
- } else {
- return false;
- }
- }
-
- /**
- * Checks if HTTP Status code is Successful (2xx)
- *
- * @return boolean
- */
- function isSuccessful($http_code)
- {
- if ($status_type = $this->getStatusType($http_code)) {
- return $status_type{0} == HTTP_HEADER_STATUS_SUCCESSFUL;
- } else {
- return false;
- }
- }
-
- /**
- * Checks if HTTP Status code is a Redirect (3xx)
- *
- * @return boolean
- */
- function isRedirect($http_code)
- {
- if ($status_type = $this->getStatusType($http_code)) {
- return $status_type{0} == HTTP_HEADER_STATUS_REDIRECT;
- } else {
- return false;
- }
- }
-
- /**
- * Checks if HTTP Status code is a Client Error (4xx)
- *
- * @return boolean
- */
- function isClientError($http_code)
- {
- if ($status_type = $this->getStatusType($http_code)) {
- return $status_type{0} == HTTP_HEADER_STATUS_CLIENT_ERROR;
- } else {
- return false;
- }
- }
-
- /**
- * Checks if HTTP Status code is Server Error (5xx)
- *
- * @return boolean
- */
- function isServerError($http_code)
- {
- if ($status_type = $this->getStatusType($http_code)) {
- return $status_type{0} == HTTP_HEADER_STATUS_SERVER_ERROR;
- } else {
- return false;
- }
- }
-
- /**
- * Checks if HTTP Status code is Server OR Client Error (4xx or 5xx)
- *
- * @return boolean
- */
- function isError($http_code)
- {
- if ($status_type = $this->getStatusType($http_code)) {
- return (($status_type == HTTP_HEADER_STATUS_CLIENT_ERROR) || ($status_type == HTTP_HEADER_STATUS_SERVER_ERROR)) ? true : false;
- } else {
- return false;
- }
- }
- /**#@-*/
- }
- ?>
-