CoffeeScript - how to avoid unnecessary returns?

Here's my CoffeeScript code:

http.createServer((req, res) ->
  if req.method is "POST"
    req.on "data", (data) ->
      queryData += data
    req.on "end", ->
      _.process req.url.substring(1), queryData, (response) ->
        res.writeHead 200,
          "Content-Type": "text/plain; charset=utf-8"
        fs.appendFile "./log", log, (err) ->
          if err
            console.log err
          else
            res.end response
  else
    res.writeHead 405,
      "Content-Type": "text/plain"
    res.end()
).listen 55385, "127.0.0.1"

Here's what I'm getting compiled:

http.createServer(function(req, res) {
  if (req.method === "POST") {
    req.on("data", function(data) {
      return queryData += data;
    });
    return req.on("end", function() {
      return _.process(req.url.substring(1), queryData, function(response) {
        res.writeHead(200, {
          "Content-Type": "text/plain; charset=utf-8"
        });
        return fs.appendFile("./log", log, function(err) {
          if (err) {
            return console.log(err);
          } else {
            return res.end(response);
          }
        });
      });
    });
  } else {
    res.writeHead(405, {
      "Content-Type": "text/plain"
    });
    return res.end();
  }
}).listen(55385, "127.0.0.1");

As you see, it's superfluous 'cause of plenty returns.

I know about coffeescript-trick with void return on the last line, but after inserting so many void returns, the code becomes larger than compiled.

Are there any ways to generate valid Node.JS code without extra returns?