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<?php |
// +----------------------------------------------------------------------+ |
// | PEAR :: HTTP | |
// +----------------------------------------------------------------------+ |
// | This source file is subject to version 3.0 of the PHP license, | |
// | that is available at http://www.php.net/license/3_0.txt | |
// | If you did not receive a copy of the PHP license and are unable | |
// | to obtain it through the world-wide-web, please send a note to | |
// | license@php.net so we can mail you a copy immediately. | |
// +----------------------------------------------------------------------+ |
// | Authors: Stig Bakken <ssb@fast.no> | |
// | Sterling Hughes <sterling@php.net> | |
// | Tomas V.V.Cox <cox@idecnet.com> | |
// | Richard Heyes <richard@php.net> | |
// | Philippe Jausions <Philippe.Jausions@11abacus.com> | |
// | Michael Wallner <mike@php.net> | |
// +----------------------------------------------------------------------+ |
// |
// $Id: HTTP.php,v 1.1 2005-03-30 08:50:19 jpm Exp $ |
|
/** |
* HTTP |
* |
* HTTP utility functions |
* |
* @package HTTP |
* @category HTTP |
* @license PHP License |
* @access public |
* @version $Revision: 1.1 $ |
*/ |
class HTTP |
{ |
/** |
* Date |
* |
* Format a RFC compliant GMT date HTTP header. This function honors the |
* "y2k_compliance" php.ini directive and formats the GMT date corresponding |
* to either RFC850 or RFC822. |
* |
* @static |
* @access public |
* @return mixed GMT date string, or false for an invalid $time parameter |
* @param mixed $time unix timestamp or date (default = current time) |
*/ |
function Date($time = null) |
{ |
if (!isset($time)) { |
$time = time(); |
} elseif (!is_numeric($time) && (-1 === $time = strtotime($time))) { |
return false; |
} |
|
// RFC822 or RFC850 |
$format = ini_get('y2k_compliance') ? 'D, d M Y' : 'l, d-M-y'; |
|
return gmdate($format .' H:i:s \G\M\T', $time); |
} |
|
/** |
* Negotiate Language |
* |
* Negotiate language with the user's browser through the Accept-Language |
* HTTP header or the user's host address. Language codes are generally in |
* the form "ll" for a language spoken in only one country, or "ll-CC" for a |
* language spoken in a particular country. For example, U.S. English is |
* "en-US", while British English is "en-UK". Portugese as spoken in |
* Portugal is "pt-PT", while Brazilian Portugese is "pt-BR". |
* |
* Quality factors in the Accept-Language: header are supported, e.g.: |
* Accept-Language: en-UK;q=0.7, en-US;q=0.6, no, dk;q=0.8 |
* |
* <code> |
* require_once 'HTTP.php'; |
* $langs = array( |
* 'en' => 'locales/en', |
* 'en-US'=> 'locales/en', |
* 'en-UK'=> 'locales/en', |
* 'de' => 'locales/de', |
* 'de-DE'=> 'locales/de', |
* 'de-AT'=> 'locales/de', |
* ); |
* $neg = HTTP::negotiateLanguage($langs); |
* $dir = $langs[$neg]; |
* </code> |
* |
* @static |
* @access public |
* @return string The negotiated language result or the supplied default. |
* @param array $supported An associative array of supported languages, |
* whose values must evaluate to true. |
* @param string $default The default language to use if none is found. |
*/ |
function negotiateLanguage($supported, $default = 'en-US') |
{ |
$supp = array(); |
foreach ($supported as $lang => $isSupported) { |
if ($isSupported) { |
$supp[strToLower($lang)] = $lang; |
} |
} |
|
if (!count($supp)) { |
return $default; |
} |
|
$matches = array(); |
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) { |
foreach (explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']) as $lang) { |
$lang = array_map('trim', explode(';', $lang)); |
if (isset($lang[1])) { |
$l = strtolower($lang[0]); |
$q = (float) str_replace('q=', '', $lang[1]); |
} else { |
$l = strtolower($lang[0]); |
$q = null; |
} |
if (isset($supp[$l])) { |
$matches[$l] = isset($q) ? $q : 1000 - count($matches); |
} |
} |
} |
|
if (count($matches)) { |
asort($matches, SORT_NUMERIC); |
return $supp[array_pop(array_keys($matches))]; |
} |
|
if (isset($_SERVER['REMOTE_HOST'])) { |
$lang = strtolower(array_pop(explode('.', $_SERVER['REMOTE_HOST']))); |
if (isset($supp[$lang])) { |
return $supp[$lang]; |
} |
} |
|
return $default; |
} |
|
/** |
* Head |
* |
* Sends a "HEAD" HTTP command to a server and returns the headers |
* as an associative array. Example output could be: |
* <code> |
* Array |
* ( |
* [response_code] => 200 // The HTTP response code |
* [response] => HTTP/1.1 200 OK // The full HTTP response string |
* [Date] => Fri, 11 Jan 2002 01:41:44 GMT |
* [Server] => Apache/1.3.20 (Unix) PHP/4.1.1 |
* [X-Powered-By] => PHP/4.1.1 |
* [Connection] => close |
* [Content-Type] => text/html |
* ) |
* </code> |
* |
* @see HTTP_Client::head() |
* @see HTTP_Request |
* |
* @static |
* @access public |
* @return mixed Returns associative array of response headers on success |
* or PEAR error on failure. |
* @param string $url A valid URL, e.g.: http://pear.php.net/credits.php |
* @param integer $timeout Timeout in seconds (default = 10) |
*/ |
function head($url, $timeout = 10) |
{ |
$p = parse_url($url); |
if (!isset($p['scheme'])) { |
$p = parse_url(HTTP::absoluteURI($url)); |
} elseif ($p['scheme'] != 'http') { |
return HTTP::raiseError('Unsupported protocol: '. $p['scheme']); |
} |
|
$port = isset($p['port']) ? $p['port'] : 80; |
|
if (!$fp = @fsockopen($p['host'], $port, $eno, $estr, $timeout)) { |
return HTTP::raiseError("Connection error: $estr ($eno)"); |
} |
|
$path = !empty($p['path']) ? $p['path'] : '/'; |
$path .= !empty($p['query']) ? '?' . $p['query'] : ''; |
|
fputs($fp, "HEAD $path HTTP/1.0\r\n"); |
fputs($fp, 'Host: ' . $p['host'] . ':' . $port . "\r\n"); |
fputs($fp, "Connection: close\r\n\r\n"); |
|
$response = rtrim(fgets($fp, 4096)); |
if (preg_match("|^HTTP/[^\s]*\s(.*?)\s|", $response, $status)) { |
$headers['response_code'] = $status[1]; |
} |
$headers['response'] = $response; |
|
while ($line = fgets($fp, 4096)) { |
if (!trim($line)) { |
break; |
} |
if (($pos = strpos($line, ':')) !== false) { |
$header = substr($line, 0, $pos); |
$value = trim(substr($line, $pos + 1)); |
$headers[$header] = $value; |
} |
} |
fclose($fp); |
return $headers; |
} |
|
/** |
* Redirect |
* |
* This function redirects the client. This is done by issuing |
* a "Location" header and exiting if wanted. If you set $rfc2616 to true |
* HTTP will output a hypertext note with the location of the redirect. |
* |
* @static |
* @access public |
* @return mixed Returns true on succes (or exits) or false if headers |
* have already been sent. |
* @param string $url URL where the redirect should go to. |
* @param bool $exit Whether to exit immediately after redirection. |
* @param bool $rfc2616 Wheter to output a hypertext note where we're |
* redirecting to (Redirecting to <a href="...">...</a>.) |
*/ |
function redirect($url, $exit = true, $rfc2616 = false) |
{ |
if (headers_sent()) { |
return false; |
} |
|
$url = HTTP::absoluteURI($url); |
header('Location: '. $url); |
|
if ( $rfc2616 && isset($_SERVER['REQUEST_METHOD']) && |
$_SERVER['REQUEST_METHOD'] != 'HEAD') { |
printf('Redirecting to: <a href="%s">%s</a>.', $url, $url); |
} |
if ($exit) { |
exit; |
} |
return true; |
} |
|
/** |
* Absolute URI |
* |
* This function returns the absolute URI for the partial URL passed. |
* The current scheme (HTTP/HTTPS), host server, port, current script |
* location are used if necessary to resolve any relative URLs. |
* |
* Offsets potentially created by PATH_INFO are taken care of to resolve |
* relative URLs to the current script. |
* |
* You can choose a new protocol while resolving the URI. This is |
* particularly useful when redirecting a web browser using relative URIs |
* and to switch from HTTP to HTTPS, or vice-versa, at the same time. |
* |
* @author Philippe Jausions <Philippe.Jausions@11abacus.com> |
* @static |
* @access public |
* @return string The absolute URI. |
* @param string $url Absolute or relative URI the redirect should go to. |
* @param string $protocol Protocol to use when redirecting URIs. |
* @param integer $port A new port number. |
*/ |
function absoluteURI($url = null, $protocol = null, $port = null) |
{ |
// filter CR/LF |
$url = str_replace(array("\r", "\n"), ' ', $url); |
|
// Mess around with already absolute URIs |
if (preg_match('!^([a-z0-9]+)://!i', $url)) { |
if (empty($protocol) && empty($port)) { |
return $url; |
} |
if (!empty($protocol)) { |
$url = $protocol .':'. array_pop(explode(':', $url, 2)); |
} |
if (!empty($port)) { |
$url = preg_replace('!^(([a-z0-9]+)://[^/:]+)(:[\d]+)?!i', |
'\1:'. $port, $url); |
} |
return $url; |
} |
|
$host = 'localhost'; |
if (!empty($_SERVER['HTTP_HOST'])) { |
list($host) = explode(':', $_SERVER['HTTP_HOST']); |
} elseif (!empty($_SERVER['SERVER_NAME'])) { |
list($host) = explode(':', $_SERVER['SERVER_NAME']); |
} |
|
if (empty($protocol)) { |
if (isset($_SERVER['HTTPS']) && !strcasecmp($_SERVER['HTTPS'], 'on')) { |
$protocol = 'https'; |
} else { |
$protocol = 'http'; |
} |
if (!isset($port) || $port != intval($port)) { |
$port = isset($_SERVER['SERVER_PORT']) ? $_SERVER['SERVER_PORT'] : 80; |
} |
} |
|
if ($protocol == 'http' && $port == 80) { |
unset($port); |
} |
if ($protocol == 'https' && $port == 443) { |
unset($port); |
} |
|
$server = $protocol .'://'. $host . (isset($port) ? ':'. $port : ''); |
|
if (!strlen($url)) { |
$url = isset($_SERVER['REQUEST_URI']) ? |
$_SERVER['REQUEST_URI'] : $_SERVER['PHP_SELF']; |
} |
|
if ($url{0} == '/') { |
return $server . $url; |
} |
|
// Check for PATH_INFO |
if (isset($_SERVER['PATH_INFO']) && $_SERVER['PHP_SELF'] != $_SERVER['PATH_INFO']) { |
$path = dirname(substr($_SERVER['PHP_SELF'], 0, -strlen($_SERVER['PATH_INFO']))); |
} else { |
$path = dirname($_SERVER['PHP_SELF']); |
} |
|
if (substr($path = strtr($path, '\\', '/'), -1) != '/') { |
$path .= '/'; |
} |
|
return $server . $path . $url; |
} |
|
/** |
* Raise Error |
* |
* Lazy raising of PEAR_Errors. |
* |
* @static |
* @access protected |
* @return object PEAR_Error |
* @param mixed $error |
* @param int $code |
*/ |
function raiseError($error = null, $code = null) |
{ |
require_once 'PEAR.php'; |
return PEAR::raiseError($error, $code); |
} |
} |
?> |