shard-kemal/docs/middlewares.md

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# Middlewares
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## Built-in Middlewares
Kemal has built-in middlewares for common use cases.
### HTTP Basic Authorization
This middleware let's you add HTTP Basic Authorization support to your Kemal application.
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You can easily use this middleware with `basic_auth` macro like below.
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```crystal
require "kemal"
basic_auth "username", "password"
get "/" do
"This won't render without correct username and password."
end
```
## Custom middlewares
You can create your own middleware by inheriting from ```HTTP::Handler```
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```crystal
class CustomHandler < HTTP::Handler
def call(request)
puts "Doing some custom stuff here"
call_next request
end
end
Kemal.config.add_handler CustomHandler.new
```