(mime, cnt) = http_probe_get(url)
    
    # Leave streaming server as is
    if mime == "srv":
        cnt = ""
        return [url]




    # Deduce likely content format

    ext = probe_playlist_fn_ext(url)
    probe = probe_playlist_content(cnt)




    # Check ambiguity (except pseudo extension)
    if len(set([source, mime, probe])) > 1:
        debug(dbg.ERR, "Possible playlist format mismatch:", "listformat={}, http_mime={}, rx_probe={}, ext={}".format(source, mime, probe, ext))

    # Extract URLs from content
    for fmt in [id[0] for id in extract_playlist.extr_urls]:

        with open(fn, "w") as f:
            debug(dbg.DATA, "exporting with format:", dest, " into filename:", fn)
            f.write( save_playlist(source="srv", multiply=True).export(urls, row, dest) )
        return [fn]
    else:
        return urls


# Test URL/path "extension" for ".pls" / ".m3u" etc.
def probe_playlist_fn_ext(url):
    e = re.findall("\.(pls|m3u|xspf|jspf|asx|wpl|wsf|smil|html|url|json)$", url)
    if e: return e[0]
    else: pass


# Probe MIME type and content per regex
def probe_playlist_content(cnt):
    for probe,rx in playlist_content_map:
        if re.search(rx, cnt, re.X|re.S):
            return listfmt(probe)
    return None


# Tries to fetch a resource, aborts on ICY responses.
#
def http_probe_get(url):

    # HTTP request, abort if streaming server hit (no HTTP/ header, but ICY/ response)