/metar/<icao>
raw metar for station <icao>

/metar/<icao>/*
metar for station <icao> all on one line

/metar/<icao>/*/<maxchars>
metar for station <icao> all on one line truncated at <maxchars>

/metar/<icao>/*/<maxchars>/<appendstr>
metar for station <icao> all on one line truncated at <maxchars> and if truncation occurs, append <appendstr>