RDF/RSS Feed in static page.

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RDF/RSS Feed in static page.

wlparks

10/13/03 06:01PM (Read 3779 times)

Junior

Status: offline

Registered: 02/21/03
Posts: 24

I made this little hack because I wanted to use geeklogs XML parser for a news feed in a static page. So heres a little workaround.

0. Backup your database
1. Make a portal block with all the correct information, and uncheck the enabled box.
2. From the blocks section of your admin options take note of the block id by looking at the link where you edit the page. It'll say something like http://www.webpage.com/admin/block.php?mode=edit&bid=22 .. bid is your block id.
3. Insert the following code into the bottom of your lib-custom.php file in your system folder.

PHP Formatted Code

// Custom RDF / RSS feed on static page
function static_rdf($blockid=false){
$error=array();
if($blockid!=false&&is_numeric($blockid)&&$blockid!=""){
global$_TABLES;
if(DB_getItem($_TABLES['blocks'],'type',"bid = '{$blockid}'")=='portal'){
$sql="SELECT UNIX_TIMESTAMP(rdfupdated) as date, content, rdfurl FROM {$_TABLES['blocks']} WHERE bid = '".$blockid."'";
$result= DB_query($sql);
$A= DB_fetchArray($result);
if( COM_rdfCheck($blockid,$A['rdfurl'],$A['date']))
{
$A['content']= DB_getItem($_TABLES['blocks'],'content',
"bid = '{$blockid}'");
}
$return=$A['content'];
}else{
$error[]='Block is not of Portal Type';
}
}else{
$error[]='Is not a valid BlockID';
}
if(count($error)>0){
$return="Something is wrong with the blockid that you entered.  Fix this.  Otherwise there could be issues";
$return.='<ul>';
for($x=0;count($error)>$x;$x++){
$return.='<li>'.$error[$x].'</li>';
}
$return.="</ul>";
}
return$return;
}

4. create a static page that has php enabled.
simply put the following code in the page

PHP Formatted Code
<br />$return= static_rdf('82');<br />return$return;<br />

replace 82 with the number of your block.

Just so you know I'm not going to take reponsibility if bad things happen with this, they shouldn't, I have done quite a bit of error handling. . . but if they do its not my fault

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wlparks

10/13/03 06:30PM

Junior

Status: offline

Registered: 02/21/03
Posts: 24

Just wanted to let everybody how well Blaine keeps up with this forum plugin, there was an issue that I had with html in the code tag and he fixed it in less then a day.

Thanks Blaine!

Warren

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jackbox

12/27/05 03:14PM

Newbie

Status: offline

Registered: 12/24/05
Posts: 5

Right now this function is only showinng the headline of the RSS feed stories. How can I make it display the introductory text also (the text is in the portal block) but the function is only returning the headers. Thanks.

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beewee

12/27/05 04:15PM

Full Member

Status: offline

Registered: 08/05/03
Posts: 969

I'm using this, if you put in multiple feed URL's it 'rotates' the feeds, but you can use it for a single feed as well. Sometimes you get a problem if a feed contains HTML tags. Just put it in a PHP-enabled static page, that's all.

PHP Formatted Code
$insideitem=false;
$tag="";
$title="";
$description="";
$link="";
$locations=array('feed1URL','feed2URL','feed3URL');
srand((float)microtime()*10000000);// seed the random gen 
$random_key=array_rand($locations);
function startElement($parser,$name,$attrs){
global$insideitem,$tag,$title,$description,$link;
if($insideitem){
$tag=$name;
}elseif($name=="ITEM"){
$insideitem=true;
}
}
function endElement($parser,$name){
global$insideitem,$tag,$title,$description,$link;
if($name=="ITEM"){
printf("<a href='%s' target=new><b>%s</b></a>",
trim($link),htmlspecialchars(trim($title)));
printf("<dt>%s<br><br>",htmlspecialchars(trim($description)));
$title="";
$description="";
$link="";
$insideitem=false;
}
}
function characterData($parser,$data){
global$insideitem,$tag,$title,$description,$link;
if($insideitem){
switch($tag){
case"TITLE":
$title.=$data;
break;
case"DESCRIPTION":
$description.=$data;
break;
case"LINK":
$link.=$data;
break;
}
}
}
$xml_parser=xml_parser_create();
xml_set_element_handler($xml_parser,"startElement","endElement");
xml_set_character_data_handler($xml_parser,"characterData");
$fp=fopen($locations[$random_key],'r')

 or die("Error reading RSS data.");
while($data=fread($fp,4096))
xml_parse($xml_parser,$data,feof($fp))

  or die(sprintf("XML error: %s at line %d",
xml_error_string(xml_get_error_code($xml_parser)),
xml_get_current_line_number($xml_parser)));
fclose($fp);
xml_parser_free($xml_parser);

Dutch Geeklog sites about camping/hiking: www.kampeerzaken.nl | www.campersite.nl | www.caravans.nl | www.caravans.net

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graffixjones

01/21/06 03:41PM

Newbie

Status: offline

Registered: 01/12/06
Posts: 5

Heya beewee,
I really like your RSS implementation, but have run into a dilemma. You mention that your code has problems with html marked-up feeds, and I was wondering if there's a way around the problem. The reason I'm asking is that I'd like to add a Google news feed to my site, and of course they use html marked-up feeds, and it appears that the xml parser is subbing in ascii codes for all the markup, and displaying essentially the 'raw' html in the feed body.

I was hoping that I could use some sort of 'convert_to_html' function after parsing so that I can coerce all the markup back to it's original state, so that the feeds all display properly. Is this even possible? I assume that if it was, you would have incorporated it into your original code, but I thought I'd ask anyway.

Thanks.

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beewee

01/21/06 06:14PM

Full Member

Status: offline

Registered: 08/05/03
Posts: 969

Well, I'm no developer, and it's not my code either, and I got the same problem sometimes. Perhaps you could use a service like Feedburner to get rid of the HTML, or to convert it to HTML.

Dutch Geeklog sites about camping/hiking: www.kampeerzaken.nl | www.campersite.nl | www.caravans.nl | www.caravans.net

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