Random Sequence

PHP 5 script to generate an RSS 2 app-cast from the contents of a folder.

Produces feeds suitable for the Sparkle framework to auto-update your Cocoa Application.

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PHP RSS Appcast Generator

How to Use

  1. Place this script in the folder you want to make an appcast of
  2. Point your feed reader to http://<folder URL>/appcast.php

Configuration (Optional)

  1. Change $title & $description variables as appropriate to your folder
  2. Add any additional file types to the $fileTypes array

Download

appcast.php (2 KB)

<?php
// ----------------------------------------------------------- //
// Script to generate an RSS appcast from folder contents
// Version 1.0.1
// 
// (cc) Random Sequence 2007, Some Rights Reserved
// 
// Licenced under a creative commons Attribution ShareAlike licence
// http://creativecommons.org/licenses/by-sa/3.0/

// ----------------------------------------------------------- //



// REQUIRES PHP 5 or greater
// Tested with APACHE 1 & 2 on Mac OS X, Debian Linux



// -------------------- BEGIN CONFIG ------------------------- //



$title = "Downloads";           // Used as feed title in feed readers
$description = "File List";     // Used as feed description in feed readers



// these are the types of files to list in the appcast & their MIME Types. Use lower case.
$fileTypes = array( "zip"=>"application/zip",
                    "tgz"=>"application/x-gtar",
                    "tar"=>"application/x-tar",
                    "dmg"=>"application/octet-stream"
                    );



// -------------------- END OF CONFIG ------------------------ //



$appcastHeader = "<?xml version=\"1.0\" encoding=\"utf-8\"?>
<rss version=\"2.0\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:sparkle=\"http://www.andymatuschak.org/xml-namespaces/sparkle\">
<channel>
    <title>title</title>
    <link>link</link>
    <description>description</description>
    <language>en</language>
";
$appcastTemplate = "
        <item>
            <guid  isPermaLink=\"false\">guid</guid>
            <title>title</title>
            <description>description</description>
            <pubDate>pubdate</pubDate>
            <enclosure
                sparkle:version=\"version\"

                type=\"type\"
                url=\"url\"
                length=\"length\" />
        </item>";



$appcastFooter = "
</channel>
</rss>";



$files = scandir(getcwd());
$etag = sha1(implode("/",$files));



// support for conditional fetch
if (isset($_SERVER['HTTP_IF_NONE_MATCH']) && $_SERVER['HTTP_IF_NONE_MATCH'] == $etag) {
    header('HTTP/1.1 304 Not Modified');
    exit;

}



$appcast = $appcastHeader;



$link = "http://".$_SERVER["HTTP_HOST"].$_SERVER["PHP_SELF"];



$appcast = str_replace("link",$link,$appcast);
$appcast = str_replace("title",$title,$appcast);
$appcast = str_replace("description",$description,$appcast);



foreach ($files as $file) {
    preg_match("/.*.([a-z09]{1,3})$/i",$file,$matches);
    if (isset($matches[1]) && isset($fileTypes[strtolower($matches[1])]) !== false) {
        $appcastFile = $appcastTemplate;



    $folderUrl = "http://".$_SERVER["HTTP_HOST"].substr($_SERVER["PHP_SELF"],0,strrpos($_SERVER["PHP_SELF"],"/"))."/";

    $guid = $folderUrl.sha1($file);         
    $title = $file;
    $description = preg_replace("/^(.*?)([0-9]+[a-z])\.([a-z09]{1,3})$/i","$1",$file);
    $pubdate = date("D, d M Y H:i:s",filectime($file)); 
    $type = $fileTypes[strtolower($matches[1])];            
    $url = $folderUrl.$file;
    $length = filesize($file);      
    $version = preg_replace("/^(.*?)([0-9]+[a-z])\.([a-z09]{1,3})$/i","$2",$file);

    $appcastFile = str_replace("*guid*",$guid,$appcastFile);    
    $appcastFile = str_replace("*title*",$title,$appcastFile);
    $appcastFile = str_replace("*description*",$description,$appcastFile);
    $appcastFile = str_replace("*version*",$version,$appcastFile);
    $appcastFile = str_replace("*pubdate*",$pubdate,$appcastFile);
    $appcastFile = str_replace("*type*",$type,$appcastFile);
    $appcastFile = str_replace("*url*",$url,$appcastFile);                                  
    $appcastFile = str_replace("*length*",$length,$appcastFile);                                    

    $appcast .= $appcastFile;   
}




}



$appcast .= $appcastFooter;



header(“Content-type: application/xml; charset=UTF-8”);

header(“ETag: $etag”);



echo $appcast;
exit;
?>

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