Question

I have this curl call:

curl -v -H "Accept: application/json" -H "Content-type: application/json" -X POST -d '{"name":"abc", "orgid":"12", "subject":"my subject"}' http://localhost:3000/mysinatraapp

post '/mysinatraapp' do
unless request.preferred_type.eql? 'text/html'
  # This is not really params hash. It will be a string like "{\"name\"=>\"abc\", \"orgid\"=>\"12\", \"subject\"=>\"my subject\"}"
    params = request.env["rack.input"].read 
    ...
    ...
    halt 400 if params.length == 0
end
  # This does not work
p "hi #{params['name']}"
end

p "hi #{params['name']}" fails because it’s not a hash. How do I make it work?

My goal is to make posted json as params hash. so that I can use params as usual.

Answer 1

You are actually passing a Ruby Hash instead of a JSON object.

Update your curl command to look like this:

-d '{"name":"abc","orgid":"12","subject":"my subject"}'

Then in your Sinatra action do like this:

params = JSON.parse(request.env["rack.input"].read)

Make sure you require 'json'