HTTP Server¶

A slightly more interesting example is an HTTP Server:

require "http/server"

server = HTTP::Server.new do |context|
  context.response.content_type = "text/plain"
  context.response.print "Hello world! The time is #{Time.local}"
end

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

The above code will make sense once you read the whole language reference, but we can already learn some things.

You can require code defined in other files:
```
require "http/server"
```
You can define local variables without the need to specify their type:
```
server = HTTP::Server.new(...)
```
The port of the HTTP server is set by using the method bind_tcp on the object HTTP::Server (the port set to 8080).
```
address = server.bind_tcp 8080
```

You program by invoking methods (or sending messages) to objects.

HTTP::Server.new(...)
# ...
Time.local
# ...
address = server.bind_tcp 8080
# ...
puts "Listening on http://#{address}"
# ...
server.listen

You can use code blocks, or simply blocks, which are a very convenient way to reuse code and get some features from the functional world:
```
HTTP::Server.new do |context|
  # ...
end
```
You can easily create strings with embedded content, known as string interpolation. The language comes with other syntax as well to create arrays, hashes, ranges, tuples and more:
```
"Hello world! The time is #{Time.local}"
```