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172 lines
6.3 KiB
PHP
172 lines
6.3 KiB
PHP
<?php
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//
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2002 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.02 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/2_02.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Author: Stig Bakken <ssb@fast.no> |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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//
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// HTTP utility functions.
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//
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if (!empty($GLOBALS['USED_PACKAGES']['HTTP'])) return;
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$GLOBALS['USED_PACKAGES']['HTTP'] = true;
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class HTTP {
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/**
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* Format a RFC compliant HTTP header. This function
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* honors the "y2k_compliance" php.ini directive.
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*
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* @param $time int UNIX timestamp
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*
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* @return HTTP date string, or false for an invalid timestamp.
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*
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* @author Stig Bakken <ssb@fast.no>
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* @author Sterling Hughes <sterling@php.net>
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*/
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function Date($time) {
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/* If we're y2k compliant, use the newer, reccomended RFC 822
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format */
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if (ini_get("y2k_compliance") == true) {
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return gmdate("D, d M Y H:i:s \G\M\T", $time);
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}
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/* Use RFC-850 which supports two character year numbers */
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else {
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return gmdate("F, d-D-y H:i:s \G\M\T", $time);
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}
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}
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/**
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* Negotiate language with the user's browser through the
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* Accept-Language HTTP header or the user's host address.
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* Language codes are generally in the form "ll" for a language
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* spoken in only one country, or "ll-CC" for a language spoken in
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* a particular country. For example, U.S. English is "en-US",
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* while British English is "en-UK". Portugese as spoken in
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* Portugal is "pt-PT", while Brazilian Portugese is "pt-BR".
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* Two-letter country codes can be found in the ISO 3166 standard.
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*
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* Quantities in the Accept-Language: header are supported, for
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* example:
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*
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* Accept-Language: en-UK;q=0.7, en-US;q=0.6, no;q=1.0, dk;q=0.8
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*
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* @param $supported an associative array indexed by language
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* codes (country codes) supported by the application. Values
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* must evaluate to true.
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*
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* @param $default the default language to use if none is found
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* during negotiation, defaults to "en-US" for U.S. English
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*
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* @author Stig Bakken <ssb@fast.no>
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*/
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function negotiateLanguage(&$supported, $default = 'en-US') {
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global $HTTP_SERVER_VARS;
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/* If the client has sent an Accept-Language: header, see if
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* it contains a language we support.
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*/
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if (isset($HTTP_SERVER_VARS['HTTP_ACCEPT_LANGUAGE'])) {
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$accepted = split(',[[:space:]]*', $HTTP_SERVER_VARS['HTTP_ACCEPT_LANGUAGE']);
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for ($i = 0; $i < count($accepted); $i++) {
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if (eregi('^([a-z]+);[[:space:]]*q=([0-9\.]+)', $accepted[$i], $arr)) {
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$q = (double)$arr[2];
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$l = $arr[1];
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} else {
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$q = 42;
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$l = $accepted[$i];
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}
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if (!empty($supported[$l]) && ($q > 0.0)) {
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if ($q == 42) {
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return $l;
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}
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$candidates[$l] = $q;
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}
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}
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if (isset($candidates)) {
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arsort($candidates);
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reset($candidates);
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return key($candidates);
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}
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}
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/* Check for a valid language code in the top-level domain of
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* the client's host address.
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*/
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if (isset($HTTP_SERVER_VARS['REMOTE_HOST']) &&
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ereg("\.[^\.]+$", $HTTP_SERVER_VARS['REMOTE_HOST'], $arr)) {
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$lang = strtolower($arr[1]);
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if (!empty($supported[$lang])) {
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return $lang;
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}
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}
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return $default;
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}
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/**
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* Sends a "HEAD" HTTP command to a server and returns the headers
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* as an associative array. Example output could be:
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* Array
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* (
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* [response_code] => 200 // The HTTP response code
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* [response] => HTTP/1.1 200 OK // The full HTTP response string
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* [Date] => Fri, 11 Jan 2002 01:41:44 GMT
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* [Server] => Apache/1.3.20 (Unix) PHP/4.1.1
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* [X-Powered-By] => PHP/4.1.1
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* [Connection] => close
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* [Content-Type] => text/html
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* )
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*
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* @param string $url A valid url, for ex: http://pear.php.net/credits.php
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* @return mixed Assoc array or PEAR error on no conection
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*
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* @author Tomas V.V.Cox <cox@idecnet.com>
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*/
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function head($url)
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{
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$purl = parse_url($url);
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$port = (isset($purl['port'])) ? $purl['port'] : 80;
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$fp = fsockopen($purl['host'], $port, $errno, $errstr, 10);
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if (!$fp) {
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return PEAR::raiseError("HTTP::head Error $errstr ($erno)");
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}
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$path = (!empty($purl['path'])) ? $purl['path'] : '/';
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fputs($fp, "HEAD $path HTTP/1.0\r\n");
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fputs($fp, "Host: " . $purl['host'] . "\r\n\r\n");
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$response = rtrim(fgets($fp, 4096));
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if(preg_match("|^HTTP/[^\s]*\s(.*?)\s|", $response, $status)) {
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$headers['response_code'] = $status[1];
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}
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$headers['response'] = $response;
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while ($line = fgets($fp, 4096)) {
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if (!trim($line)) {
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break;
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}
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if (($pos = strpos($line, ':')) !== false) {
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$header = substr($line, 0, $pos);
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$value = trim(substr($line, $pos + 1));
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$headers[$header] = $value;
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}
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}
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fclose($fp);
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return $headers;
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}
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}
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?>
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