Simple Crystal router

greeting.ecr

Greeting, <%= @name %>!

router.cr

require "http/server"
require "json"
require "./µPub/view"

server = HTTP::Server.new([
  HTTP::LogHandler.new,
]) do |context|
    req = context.request
    res = context.response
        if req.method == "GET" && req.path == "/foo"
            query = req.query_params["test"]? || "" #=> http://0.0.0.0:8080/foo?test=test
            res.headers["Server"] = "Crystal"
            res.cookies["foo"] = HTTP::Cookie.new("foo", "bar", "/foo", Time.utc + 12.hours, secure: true)
            res.content_type = "text/plain"
            res.print "Hello world! #{query}" #=> Hello world! test
        elsif req.method == "GET" && req.path == "/json"
            res.content_type = "application/json"
            res.print "Hello World!".to_json
        elsif req.method == "POST" && req.path == "/john"
            body = context.request.body.not_nil!.gets_to_end # Solved by: Kemal/param_parser
            params = HTTP::Params.parse(body) #=> curl -X POST http://0.0.0.0:8080/john  -d 'surname=Smith' 
            name = Greeting.new("John").to_s
            surname = params["surname"]
            res.content_type = "text/plain"
            res.print "#{name} #{surname}" #=> Greeting, John! Smith
        else
            res.status_code = 500
        end
    end

address = server.bind_tcp "0.0.0.0", 8080
puts "Listening on http://#{address}"
server.listen

view.cr

require "ecr"

class Greeting
  def initialize(@name : String)
  end

  ECR.def_to_s "./greeting.ecr"
end

My server = FreeBSD11, my computer = Linux amd64.
I can't use Kermal because one uses 0.35 Crystal and the other 0.27.

The only option is to write the router myself or change language.
Though I wouldn't recommend it for non-small applications (above 10 routes).

PS: Warning: /john = memory leaks.