X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=http.php;h=b1f2aece64279389f230b001c66637a15d8e6244;hb=f0092052f5357e8e7430a2180a56f1536b613da5;hp=c7c457a21ccb5b946d60d09e60c52df7945a1f85;hpb=a11c234de210c655511de6e841eaf87d4787b3f5;p=wfpl.git

diff --git a/http.php b/http.php
index c7c457a..b1f2aec 100644
--- a/http.php
+++ b/http.php
@@ -1,35 +1,19 @@
 <?php
 
-#  Copyright (C) 2005 Jason Woofenden
-#
-#  This file is part of wfpl.
-#
-#  wfpl 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.
-#
-#  wfpl is distributed in the hope that it will be useful, but WITHOUT ANY
-#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-#  FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
-#  more details.
-#
-#  You should have received a copy of the GNU Lesser General Public License
-#  along with wfpl; if not, write to the Free Software Foundation, Inc., 51
-#  Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+# This program is in the public domain within the United States. Additionally,
+# we waive copyright and related rights in the work worldwide through the CC0
+# 1.0 Universal public domain dedication, which can be found at
+# http://creativecommons.org/publicdomain/zero/1.0/
 
 
-# return our best guess at the url used to access this page
-function this_url() {
-	list($protocol, $version) = explode('/', $_SERVER['SERVER_PROTOCOL']);
-	$url = strtolower($protocol);
-
-	if($url == 'http') {
-		$expected_port = 80;
-	} elseif ($url == 'https') {
+# return our best guess at the url used to access this page, without the path or query string
+function this_url_sans_path() {
+	if (isset($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS']) == 'on' || strtolower($_SERVER['HTTPS']) == 'yes')) {
+		$url = 'https';
 		$expected_port = 443;
 	} else {
-		$expected_port = -1;
+		$url = 'http';
+		$expected_port = 80;
 	}
 
 	$url .= '://';
@@ -42,19 +26,70 @@ function this_url() {
 		}
 	}
 
+	return $url;
+}
+
+# just the hostname, no port number
+function this_host() {
+	if($_SERVER['HTTP_HOST']) {
+		$host = $_SERVER['HTTP_HOST'];
+		$p = strpos($host, ':');
+		if($p) {
+			$host = substr($host, 0, $p);
+		}
+		return $host;
+	} else {
+		return $_SERVER['SERVER_NAME'];
+	}
+}
+
+
+
+# return our best guess at the url used to access this page
+function this_url() {
+	$url = this_url_sans_path();
+
 	$url .= $_SERVER['REQUEST_URI'];
 
 	return $url;
 }
 
+# sends an HTTP redirect
+#
+# $url can be:
+#   1) a full URL
+#   2) an absolute path
+#   3) a filename (you can pass a directory/file.html and such, but "../" prefix is not supported yet)
 function redirect($url, $status = '302 Moved Temporarily', $message = '') {
+	if(!strpos($url, ':')) {
+		while(substr($url, 0, 2) == './') {
+			$url = substr($url, 2);
+		}
+		if(substr($url, 0, 1) == '/') {
+			$url = this_url_sans_path() . $url;
+		} else {
+			$url = preg_replace('|/[^/]*$|', "/$url", this_url());
+		}
+	}
+			
 	if(function_exists('session_save_messages')) {
+		if(function_exists('atexit_now')) {
+			atexit_now();
+		}
 		session_save_messages();
 	}
+
 	header("HTTP/1.0 $status");
 	header("Location: $url");
 	echo($message);
 	exit();
 }
 
+# output http headers to allow caching of this page forever
+function http_cache_forever($cache_control = 'public') {
+	header('Last-Modified: '.gmdate('D, d M Y H:i:s', 5025) . ' GMT'); # long time ago
+	header("Cache-Control: $cache_control");
+	header('Expires: ' . gmdate('D, d M Y H:i:s',time()+31536000) . ' GMT'); # rfc 2616 says not to go more than a year in the future
+}
+
 ?>