Response

Usage

You can use the res object to send a response to the client.

# app.rb

app.get '/' do |req, res|
	res.html 'Hello World'
end

Content Types

Lenna supports the following content types:

# app.rb

app.get '/' do |req, res|
	res.html 'Hello World'
	res.json '{"message": "Hello World"}'
	res.text 'Hello World'
end

But you can also set your own content type:

res['content-type'] = 'text/markdown'
res.write '# Hello World'

The write method

You can use the res.write method to write to the response body:

# app.rb

app.get '/' do |req, res|
	res.write 'Hello World'
end

JSON example:

# app.rb

app.post '/posts' do |req, res|
	req.params # => { name: 'Lenna' }
	name = req.params[:name]

	res.write({ data: { name: } }.to_json) # This will write to the response body
end

Status Codes

You can set the status code using the res.status method:

res.status 200

Redirects

You can redirect the client using the res.redirect method:

# app.ruby

app.get '/' do |req, res|
  # Stuff code here...
	res.redirect '/hello'
end