Ruby API (RabbitMQ create user) - ruby

Question

Started working on Ruby a week back. Writing an API to connect to RabbitMQ messaging queue. The command line for adding a new user works.
$ curl -i -u guest:guest -H "content-type:application/json" -XPUT -d'{"password":"pwd","tags":"administrator"}' http://localhost:15672/api/users/username
I need to make this Http Put request from Ruby. The following is my code:
def test_add_user
uri = URI.parse('http://localhost:15672/api/users/karthik/')
uri.to_s
http = Net::HTTP.new(uri.host, uri.port)
request = Net::HTTP::Put.new(uri.path)
request.basic_auth 'guest', 'guest'
request['Content-Type'] = 'application/json'
request['Accept'] = 'application/json'
request.set_form_data({'password' => 'secret', 'tags' => 'management'})
http.start do |http|
res = http.request(request)
puts res
end
end
This is the result I get
o.test_add_user
#<Net::HTTPUnsupportedMediaType:0x007fd7fb6fe1d8>
=> nil
Does Media type exception relate with Content-Type?
Only application/json is allowed
Should I use anything like to_json? If yes, where should it be used? Thanks in advance.
Regards
Karthik

Answer 1

Thank you Hector and ptd. Fixed it. Attached the working code for future reference.
def test_add_user
uri = URI.parse('http://localhost:15672/api/users/Test1/')
http = Net::HTTP.new(uri.host, uri.port)
request = Net::HTTP::Put.new(uri.path)
request.basic_auth 'guest', 'guest'
request['Content-Type'] = 'application/json'
request['Accept'] = 'application/json'
request.body = {'password' => 'secret', 'tags' => 'management'}.to_json
http.start do |http|
res = http.request(request)
puts res
end
end
Adds a new user to the RabbitMQ queue