error){
print "Error:
n$rss->error
";
}else{
$rss->parse();
$rss->showHeading("h1");
if($rss->link){
print "Provided courtesy of:
n";
print "$rss->linkn";
}
$rss->image->show("middle");
$rss->showDescription();
$rss->showStories();
}
rssFeed: object
Purpose: Creates an rssFeed class that allows easy display of RSS data.
Public Methods:
parse Parses the XML and populates properties with the resulting data
showHeading Displays the title
showImage Displays the image associated with the feed
showLink Displays a link to the RSS provider
showDescription Displays the feed description
showStories Displays the feed items
Public Properties:
title: The title of the RSS feed
copyright: The copyright information included in the RSS feed
description: The description included in the RSS feed
image An instance of an rssImage object (see below)
stories An array of newsStory objects (see below)
url The URI of the RSS feed
xml The raw XML data obtained from the feed
error A text description of the most recent error encountered
maxstories The maximum number of stories to show (zero = no limit)
rssImage: object
Purpose: Creates a class to store information about an image for an RSS feed
Public Methods:
show Displays the image
Public Properties:
title The image title, used for ALT attribute
url The URL of the image
link The URL that the image should link to
width The image width in pixels
height The image height in pixels
newsStory: object
Purpose: Creates a class to store an news story in an RSS feed
Public Methods:
show Displays the story
Public Properties:
show Displays the story
title The headline associated with the story
link The link to the full story
description A short description, or teaser, of the story
pubdate Date/Time the story was published
*/
//classes follow
// Generic container for the complete RSS feed
class rssFeed{
var $title="";
var $copyright="";
var $description="";
var $image;
var $stories=array();
var $url="";
var $xml="";
var $link="";
var $error="";
var $maxstories=0;
// public methods
function parse(){
$parser=xml_parser_create();
xml_set_element_handler($parser, "startElement", "endElement");
xml_set_character_data_handler($parser, "characterData");
xml_parse($parser, $this->xml, true)
or die(sprintf("XML error: %s at line %d",
xml_error_string(xml_get_error_code($parser)),
xml_get_current_line_number($parser)));
xml_parser_free($parser);
}
function showHeading($tag=""){
$tag=$tag?$tag:"h1";
if($this->title)
print "<$tag>$this->titlen";
}
function showImage($align=""){
$this->image->show($align);
}
function showLink(){
if($this->link)
print "$this->linkn";
}
function showDescription(){
if($this->description)
print "
$this->description
n";
}
function showStories(){
echo "n";
$n=0;
foreach($this->stories as $story){
$n++;
if ($this->maxstories && $n>$this->maxstories)
break;
$story->show();
}
echo "
n";
}
// Methods used internally
// Constructor: Expects one string parameter that is the URI of the RSS feed
function rssFeed($uri=''){
$this->image=new rssImage();
if($uri){
$this->url=$uri;
$this->getFeed();
} else {
$this->error="No URL for RSS feed";
}
}
// Retrieves the XML from the RSS supplier
function getFeed(){
// if we have a URL
if ($this->url){
if (extension_loaded('curl')) {
$this->xml=$this->getRemoteFile($this->url);
}
}
}
function getRemoteFile($url){
$s=new gwSocket();
if($s->getUrl($url)){
if(is_array($s->headers)){
$h=array_change_key_case($s->headers, CASE_LOWER);
if($s->error) // failed to connect with host
$buffer=$this->errorReturn($s->error);
elseif(preg_match("/404/",$h['status'])) // page not found
$buffer=$this->errorReturn("Page Not Found");
elseif(preg_match("/xml/i",$h['content-type'])) // got XML back
$buffer=$s->page;
else // got a page, but wrong content type
$buffer=$this->errorReturn("The server did not return XML. The content type returned was ".$h['content-type']);
} else {
$buffer=$this->errorReturn("An unknown error occurred.");
}
}else{
$buffer=$this->errorReturn("An unknown error occurred.");
}
return $buffer;
}
function errorReturn($error){
$retVal="n".
"n".
"tn".
"ttFailed to Get RSS Datan".
"ttAn error was ecnountered attempting to get the RSS data: $errorn".
"tt".date("D, d F Y H:i:s T")."n".
"tt".date("D, d F Y H:i:s T")."n".
"tn".
"n";
return $retVal;
}
function addStory($o){
if(is_object($o))
$this->stories[]=$o;
else
$this->error="Type mismatach: expected object";
}
}
class rssImage{
var $title="";
var $url="";
var $link="";
var $width=0;
var $height=0;
function show($align=""){
if($this->url){
if($this->link)
print "link">";
//print "link">";
print "
url" style="border:none;"";
if($this->title)
print " alt="$this->title"";
if($this->width)
print " width="$this->width" height="$this->height"";
if($align)
print " align="$align"";
print ">";
if($this->link)
print "";
}
}
}
class newsStory{
var $title="";
var $link="";
var $description="";
var $pubdate="";
function show(){
if($this->title){
if($this->link){
echo "link">$this->titlen";
//echo "link">$this->titlen";
}elseif($this->title){
echo "$this->titlen";
}
echo "";
if($this->pubdate)
echo "$this->pubdate - ";
if($this->description)
echo "$this->description";
echo "n";
}
}
}
class gwSocket{
var $Name="gwSocket";
var $Version="0.1";
var $userAgent="Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)";
var $headers;
var $page="";
var $result="";
var $redirects=0;
var $maxRedirects=3;
var $error="";
function getUrl( $url ) {
$retVal="";
$url_parsed = parse_url($url);
$scheme = $url_parsed["scheme"];
$host = $url_parsed["host"];
$port = $url_parsed["port"]?$url_parsed["port"]:"80";
$user = $url_parsed["user"];
$pass = $url_parsed["pass"];
$path = $url_parsed["path"]?$url_parsed["path"]:"/";
$query = $url_parsed["query"];
$anchor = $url_parsed["fragment"];
if (!empty($host)){
// attempt to open the socket
if($fp = fsockopen($host, $port, $errno, $errstr, 2)){
$path .= $query?"?$query":"";
$path .= $anchor?"$anchor":"";
// this is the request we send to the host
$out = "GET $path ".
"HTTP/1.0rn".
"Host: $hostrn".
"Connection: Closern".
"User-Agent: $this->userAgentrn";
if($user)
$out .= "Authorization: Basic ".
base64_encode("$user:$pass")."rn";
$out .= "rn";
fputs($fp, $out);
while (!feof($fp)) {
$retVal.=fgets($fp, 128);
}
fclose($fp);
} else {
$this->error="Failed to make connection to host.";//$errstr;
}
$this->result=$retVal;
$this->headers=$this->parseHeaders(trim(substr($retVal,0,strpos($retVal,"rnrn"))));
$this->page=trim(stristr($retVal,"rnrn"))."n";
if(isset($this->headers['Location'])){
$this->redirects++;
if($this->redirects<$this->maxRedirects){
$location=$this->headers['Location'];
$this->headers=array();
$this->result="";
$this->page="";
$this->getUrl($location);
}
}
}
return (!$retVal="");
}
function parseHeaders($s){
$h=preg_split("/[rn]/",$s);
foreach($h as $i){
$i=trim($i);
if(strstr($i,":")){
list($k,$v)=explode(":",$i);
$hdr[$k]=substr(stristr($i,":"),2);
}else{
if(strlen($i)>3)
$hdr[]=$i;
}
}
if(isset($hdr[0])){
$hdr['Status']=$hdr[0];
unset($hdr[0]);
}
return $hdr;
}
}
/*
end of classes - global functions follow
*/
function startElement($parser, $name, $attrs) {
global $insideitem, $tag, $isimage;
$tag = $name;
if($name=="IMAGE")
$isimage=true;
if ($name == "ITEM") {
$insideitem = true;
}
}
function endElement($parser, $name) {
global $insideitem, $title, $description, $link, $pubdate, $stories, $rss, $globaldata, $isimage;
$globaldata=trim($globaldata);
// if we're finishing a news item
if ($name == "ITEM") {
// create a new news story object
$story=new newsStory();
// assign the title, link, description and publication date
$story->title=trim($title);
$story->link=trim($link);
$story->description=trim($description);
$story->pubdate=trim($pubdate);
// add it to our array of stories
$rss->addStory($story);
// reset our global variables
$title = "";
$description = "";
$link = "";
$pubdate = "";
$insideitem = false;
} else {
switch($name){
case "TITLE":
if(!$isimage)
if(!$insideitem)
$rss->title=$globaldata;
break;
case "LINK":
if(!$insideitem)
$rss->link=$globaldata;
break;
case "COPYRIGHT":
if(!$insideitem)
$rss->copyright=$globaldata;
break;
case "DESCRIPTION":
if(!$insideitem)
$rss->description=$globaldata;
break;
}
}
if($isimage){
switch($name){
case "TITLE": $rss->image->title=$globaldata;break;
case "URL": $rss->image->url=$globaldata;break;
case "LINK": $rss->image->link=$globaldata;break;
case "WIDTH": $rss->image->width=$globaldata;break;
case "HEIGHT": $rss->image->height=$globaldata;break;
}
}
if($name=="IMAGE")
$isimage=false;
$globaldata="";
}
function characterData($parser, $data) {
global $insideitem, $tag, $title, $description, $link, $pubdate, $globaldata;
if ($insideitem) {
switch ($tag) {
case "TITLE":
$title .= $data;
break;
case "DESCRIPTION":
$description .= $data;
break;
case "LINK":
$link .= $data;
break;
case "PUBDATE":
case "DC:DATE":
$pubdate .= $data;
break;
}
} else {
$globaldata.=$data;
}
}
?>