Podcast download script (Powershell)

download-podcasts.ps1

# 1. Get a list of podcast episode mp3 files, e.g. from an RSS feed from https://feeds.megaphone.fm
# (just google "<your podcast> rss feed")
# 2. Run the get-mp3s.js script in your browser console to assemble a list of MP3 files (the url attribute of the enclosure xml tags)
#  It's probably possible to have powershell download and parse the xml file to get the same result, but I'm just penning down the hacky method of doing it now.
$Urls = @()
$Urls += "https://example.com/podcast-episode-1.mp3"
# paste the rest here

# update this path to your destination, make sure it ends with a backslash
$OutPath = "C:\Users\yourname\Desktop\Destination\"

# iterate over URLs
ForEach ( $item in $Urls) {
    # takes the filename.mp3 part from the URL
    $file = $OutPath +  ($item).split('/')[-1].split("?")[0]
    # write the URL and the destination file
    Write-Output $item
    Write-Output $file
    # download
    Invoke-WebRequest -Uri $item -Outfile $file
}

get-mp3s.js

// this prints out a list of powershell append operations to put in the ps1 script
xmlhttp=new XMLHttpRequest();
xmlhttp.open("GET","https://feeds.megaphone.fm/QCD8163454930",false);
if (xmlhttp.overrideMimeType){
    xmlhttp.overrideMimeType('text/xml');
}
xmlhttp.send();
xmlDoc=xmlhttp.responseXML;
var tagObj=xmlDoc.getElementsByTagName("item");
for (var i = 0; i < tagObj.length; i++) {
  console.log(`$Urls += "${tagObj[i].getElementsByTagName("enclosure")[0].getAttribute("url")}"`);
}