+++ /dev/null
-<?php
-/*
- Outputs RSS/Atom feeds, multiple versions supported (RSS 0.91, 1.0, 2.0,
- 3.0 and Atom 0.3); what clients get depends on what they asked for:
- - Accept: text/x-rss; revision=2.0
- - Accept: application/atom+xml
-*/
-
-//define("EWIKI_DESC", "ThisWiki - site slogan..."); # site description
-//define("EWIKI_COPY", "PrimarilyPublicDomain"); # site copyright
-//define("EWIKI_CATEGORY", "Technique"); # site subject
-//define("EWIKI_LOGO_URL", "http://.../logo.png");
-
-
-#---------------------------------------------------------------------------
-# outputs a feed from the given array of page $data hashes
-#
-function ewiki_feed($pages, $type="AUTO")
-{
- global $ewiki_config;
- ob_end_clean();
-
- #-- general feed infos
- $feed_info = array(
- "title" => EWIKI_NAME,
- "lang" => EWIKI_DEFAULT_LANG,
- "desc" => defined("EWIKI_DESC")?EWIKI_DESC : EWIKI_NAME . " - an open hypertext site",
- "copyright" => defined("EWIKI_COPY")?EWIKI_COPY : "copyrighted",
- "category" => defined("EWIKI_CATEGORY")?EWIKI_CATEGORY : "None",
-// "logo" => defined("EWIKI_LOGO_URL")?EWIKI_LOGO_URL : "http://erfurtwiki.sf.net/squirrel.jpeg",
- "url" => ewiki_script_url(),
- "rc_url" => ewiki_script_url("", "UpdatedPages"),
- "ewiki" => "ewiki/".EWIKI_VERSION,
- "charset" => EWIKI_CHARSET,
- );
-
- #-- fix/prepare feed entries
- $lm = UNIX_MILLENNIUM;
- foreach ($pages as $i=>$data) {
- if (!is_array($data)) {
- $data = ewiki_db::GET($data);
- $pages[$i] = $data;
- }
- // ...
- if ($data["id"]) {
- if (empty($data["title"])) { $pages[$i]["title"] = ewiki_split_title($data["id"], -1, 0); }
- if (empty($data["url"])) { $pages[$i]["url"] = ewiki_script_url("", $data["id"]); }
- if (empty($data["uri"])) { $pages[$i]["uri"] = "x-wiki:".EWIKI_NAME.":".ewiki_xmlentities(urlencode($data["id"])); }
- if (empty($data["guid"])) { $pages[$i]["guid"] = ewiki_script_url("", $data["id"], "version=$data[version]"); }
- }
- $pages[$i]["content"] = strtr(ewiki_xmlentities(substr($data["content"], 0, 300)), "\r\n\t\f", " ");
- $pages[$i]["pdate"] = gmstrftime("%a, %d %b %G %T %Z", $data["lastmodified"]);
- $pages[$i]["idate"] = gmstrftime("%G%m%dT%TZ", $data["lastmodified"]);
- $pages[$i]["icdate"] = gmstrftime("%G%m%dT%TZ", $data["created"]);
- if ($lm < $data["lastmodified"]) {
- $lm = $data["lastmodified"];
- }
- $data["content"] = "";
- }
- $info["modified"] = $lm;
-
- #-- respect some common parameters
- if (($limit = $_REQUEST["limit"])
- or ($limit = $_REQUEST["items"])
- or ($limit = $ewiki_config["list_limit_rss"])
- or ($limit = $ewiki_config["list_limit"])) {
- $pages = array_slice($pages, 0, $limit);
- }
-
- #-- encode everything into UTF-8?
- // no
-
- #-- engage compression
- if ($_SERVER["HTTP_ACCEPT_ENCODING"]) {
- ob_start("ob_gzhandler");
- ob_implicit_flush(0);
- }
-
- #-- what to return
- if (!is_string($type) || (strtoupper($type)=="AUTO") || ($type=="*")) {
- $type = ewiki_feed_type();
- }
- header("Vary: accept,negotiate");
- header("TCN: choice");
- switch ($type) {
- case "RSS0":
- ewiki_feed_rss0($feed_info, $pages);
- case "RSS2":
- ewiki_feed_rss2($feed_info, $pages);
- case "RSS3":
- ewiki_feed_rss3($feed_info, $pages);
- case "RSS1":
- ewiki_feed_rss1($feed_info, $pages);
- case "ATOM":
- ewiki_feed_atom($feed_info, $pages);
- case "DUMB":
- default:
- header("Status: 406 Not Acceptable");
- header("Content-Type: text/plain");
- die("You are using a pretty dumb feed reader, it didn't\n".
- "send any appropriate Accept: header. Go away.");
- }
- die();
-}
-
-
-
-#---------------------------------------------------------------------------
-# returns Netscape RSS 0.91 (other versions are neglectable)
-#
-function ewiki_feed_rss0($info, $pages)
-{
-# header('Content-Type: text/x-rss');
- header('Content-Type: application/rss+xml; revision="0.91"');
-
- $pages = array_slice($pages, 0, 15);
- $name = $info["title"];
-
-echo<<<EOT
-<?xml version="1.0" encoding="$info[charset]"?>
-<!DOCTYPE rss PUBLIC "-//Netscape Communications//DTD RSS 0.91//EN" "http://my.netscape.com/publish/formats/rss-0.91.dtd">
-<rss version="0.91">
- <channel>
- <title>$info[title]</title>
- <language>$info[lang]</language>
- <description>$info[desc]</description>
- <link>$info[url]</link> \n
-EOT;
-
- #-- items
- foreach ($pages as $data) {
-echo<<<EOT
- <item>
- <title>$data[title]</title>
- <link>$data[url]</link>
- <description>$data[content]</description>
- <pubDate>$data[pdate]</pubDate>
- </item>\n
-EOT;
- } //<?
-
-echo " </channel>\n</rss>\n";
- die();
-}
-
-
-
-#---------------------------------------------------------------------------
-# writes RSS 2.0
-#
-function ewiki_feed_rss2($info, $pages)
-{
- header('Content-Type: application/rss+xml; revision="2.0"');
-
- $name = $info["title"];
-
-echo<<<EOT
-<?xml version="1.0" encoding="$info[charset]"?>
-<rss version="2.0">
- <channel>
- <title>$info[title]</title>
- <link>$info[url]</link>
- <language>$info[lang]</language>
- <description>$info[desc]</description>
- <generator>$info[ewiki]</generator>
- <webMaster>$_SERVER[SERVER_ADMIN]</webMaster>\n
-EOT;
-
- #-- items
- foreach ($pages as $data) {
-echo<<<EOT
- <item>
- <title>$data[title]</title>
- <link>$data[url]</link>
- <description>$data[content]</description>
- <pubDate>$data[pdate]</pubDate>
- <guid>$data[guid]</guid>
- </item>\n
-EOT;
- } //<?
-
-echo " </channel>\n</rss>\n";
- die();
-}
-
-
-
-#---------------------------------------------------------------------------
-# outputs RSS 3.0 (text/plain, much like 822)
-#
-function ewiki_feed_rss3($info, $pages)
-{
- header('Content-Type: text/plain; charset="'.$info["charset"].'"');
-
- $name = $info["title"];
-
-echo<<<EOT
-title: $info[title]
-link: $info[url]
-language: $info[lang]
-description: $info[desc]
-generator: $info[ewiki]
-webMaster: $_SERVER[SERVER_ADMIN]
-rights: $info[copyright]
-\n
-EOT;
-
- #-- items
- foreach ($pages as $data) {
-echo<<<EOT
-title: $data[title]
-link: $data[url]
-guid: $data[guid]
-uri: $data[uri]
-description: $data[content]
-created: $data[icdate]
-last-modified: $data[idate]
-\n
-EOT;
- }
-
- echo "\n";
- die();
-}
-
-
-
-#---------------------------------------------------------------------------
-# returns RDF/RSS1.0 (no real RSS, obsoleted by Atom)
-#
-function ewiki_feed_rss1($info, $pages)
-{
- header('Content-Type: application/rss+xml; revision="1.0"');
-
- $name = $info["title"];
- $urnpfix = "x-wiki"; // uniform resource name prefix ("urn:x-wiki" was ok)
-
- #-- parts
- $_logo = $info["logo"] ? "<image rdf:resource=\"$urnpfix:$name:logo#1\" />\n" : "";
-
-echo<<<EOT
-<?xml version="1.0" encoding="$info[charset]"?>
-<rdf:RDF
-xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-xmlns:dc="http://purl.org/dc/elements/1.1/"
-xmlns:RSS="http://purl.org/rss/1.0/"
-xmlns:wiki="http://purl.org/rss/1.0/modules/wiki/">
- <RSS:channel rdf:about="$info[url]">
- <RSS:title>$name</RSS:title>
- <dc:title>$name</dc:title>
- <RSS:link>$info[rc_url]</RSS:link>
- <RSS:description>UpdatedPages on $name</RSS:description>
- <wiki:interwiki>$name</wiki:interwiki>
- $_logo
- <RSS:items>
- <rdf:Seq>\n
-EOT;
- #-- output Seq ids
- foreach ($pages as $i=>$data) {
- $pages[$i]["rdf_id"] = "$urnpfix:$name:".ewiki_xmlentities(urlencode($data["id"]))."#$data[version]_$data[lastmodified]";
- echo ' <rdf:li rdf:resource="'.$pages[$i]["rdf_id"].'"/>' . "\n";
- } //<?
-echo<<<EOT
- </rdf:Seq>
- </RSS:items>
- </RSS:channel>
-<!-- RDF associated data for references from above -->\n
-EOT;
- #-- logo
- if ($_logo) {
-echo<<<EOT
- <RSS:image rdf:about="$urnpfix:$name:logo#1">
- <RSS:title>$name</RSS:title>
- <RSS:link>$url</RSS:link>
- <RSS:url>$info[logo]</RSS:url>
- </RSS:image>\n
-EOT;
- } //<?
-
- #-- write items
- foreach ($pages as $i=>$data) {
- preg_match('/^([^\s]+).+\(.*([\d.]+)\)/', $data["author"], $uu);
- $author_host = $uu[2];
- $author_name = $uu[1];
- $url_diff = ewiki_script_url("diff", $data["id"]);
- $url_info = ewiki_script_url("info", $data["id"]);
- $stat = ($data["version"]==1) ? "created" : "updated";
-echo<<<EOT
- <RSS:item rdf:about="$data[rdf_id]">
- <RSS:title>$data[title]</RSS:title>
- <dc:title>$data[title]</dc:title>
- <RSS:description>$data[content]</RSS:description>
- <RSS:link>$data[url]</RSS:link>
- <wiki:diff>$url_diff</wiki:diff>
- <wiki:history>$url_info</wiki:history>
- <wiki:version>$data[version]</wiki:version>
- <wiki:status>$stat</wiki:status>
- <dc:date>$data[idate]</dc:date>
- <dc:contributor>
- <rdf:Description wiki:host="$author_host">
- <rdf:value>$author_name</rdf:value>
- </rdf:Description>
- </dc:contributor>
- </RSS:item>\n
-EOT;
- } //<?
-
- echo "</rdf:RDF>\n";
- die();
-}
-
-
-
-#---------------------------------------------------------------------------
-# returns ATOM 0.3 feed
-#
-function ewiki_feed_atom($info, $pages)
-{
- header('Content-Type: application/atom+xml');
- $name = $info["title"];
- $ilm = gmstrftime("%G%m%dT%TZ", $info["modified"]);
-
-echo<<<EOT
-<?xml version="1.0" encoding="$info[charset]"?>
-<feed version="0.3" xmlns="http://purl.org/atom/ns#">
- <title>$name</title>
- <link rel="alternate" type="text/html" href="$info[url]"/>
- <modified>$ilm</modified>
- <author>*</author>
- <generator>$info[ewiki]</generator>\n
-EOT;
-
- #-- write items
- foreach ($pages as $i=>$data) {
- $etag = ewiki_etag($data);
- echo<<<EOT
- <entry>
- <title>$data[title]</title>
- <link rel="alternate" type="text/html" href="$data[url]"/>
- <id>$etag</id>
- <issued>$data[icdate]</issued>
- <created>$data[icdate]</created>
- <modified>$data[idate]</modified>
- <content>$data[content]</content>
- </entry>\n
-EOT;
- } //<?
-
- echo "</feed>\n";
- die();
-}
-
-
-
-#---------------------------------------------------------------------------
-# checks HTTP Accept: header for guessing what's desired
-# (btw, we just ignore dumb and HTTP incompliant clients)
-#
-function ewiki_feed_type()
-{
- $regex_RSS = '#^(text|application)/(x[-.])*rss(\+xml)?$|^\*/\*$#';
- $regex_RDF = '#^(text|application)/(x[-.])*(rss[-.+])?rdf([-.]rss)?(\+xml)?$#';
- $regex_ATOM= '#^(text|application)/(x[-.])*atom(\+xml)*$#';
- $what = "DUMB";
- $types = ewiki_sort_accept($_SERVER["HTTP_ACCEPT"]);
- foreach ($types as $type=>$attr) {
- #-- RSS
- if (preg_match($regex_RSS, $type) || ($type == "text/xml")) {
- $ver = isset($attr["version"]) ? (int) $attr["version"] : (int) $attr["revision"];
- if ($ver < 4) {
- $WHAT = "RSS$ver"; // one of "RSS0", "RSS1", "RSS2", "RSS3"
- if ($ver != 1) {
- break;
- }
- }
- }
- #-- ATOM
- elseif (preg_match($regex_ATOM, $type)) {
- $WHAT = "ATOM";
- break;
- }
- #-- exceptions
- elseif (preg_match($regex_RDF, $type))
- { $WHAT = "RSS1"; break; }
- elseif ($type == "text/plain")
- { $WHAT = "RSS3"; break; }
- elseif ($type == "*/*")
- { $WHAT = "RSS2"; }
- }
- return($WHAT);
-}
-
-
-
-#---------------------------------------------------------------------------
-# evaluates and sorts Accept: header (and alikes)
-#
-function ewiki_sort_accept($str) {
- $r = array();
- $attr = array();
- $def = 0.99;
- foreach (explode(",", $str) as $type) {
- $type = strtok(trim($type), ";");
- $q = ($def *= 0.99);
- if ($params = trim(strtok("\000"))) {
- foreach (explode(";", $params) as $p) {
- $pname = trim(strtok($p, "="));
- $val = trim(strtok("\000"));
- if ($pname == "q") {
- ($q = $val * 1.0) or ($q = $def);
- }
- $attr[$type][$pname] = $val;
- }
- }
- $r[$type] = $q;
- }
- arsort($r);
- foreach ($r as $t=>$uu) {
- $r[$t] = $attr[$t];
- }
- return($r);
-}
-
-
-#-- PHP backwards compatibility
-if (!function_exists("xmlentities")) {
- function xmlentities($str) {
- return strtr($str, array("&"=>"&", "<"=>"<",
- ">"=>">", "\""=>""", "'"=>"'"));
- }
-}
-
-#-- does not reescape numeric XML entities
-function ewiki_xmlentities($str) {
- $xe = array("&"=>"&", "<"=>"<", ">"=>">", "\""=>""", "'"=>"'");
- return preg_replace("/(&(?>!#x|#\d)|[<>\"'])/e", '$xe["$1"]', $str);
-}
-
-
-?>
\ No newline at end of file
projects / atutor.git / blobdiff