Unauthorized readbody=true when posting message to hangout chat room with webhook - ruby

Question

Trying to post a message to a hangout chat room. I've generated a webhook for the room and used it as uri in the following code. The rest are basic net/http stuff.
require 'net/http'
require 'uri'
message = 'hello'
# prep and send the http request
uri = URI.parse("https://chat.googleapis.com/v1/spaces/AAAAcroWtl4/messages?key=abc&token=xyz")
request = Net::HTTP::Post.new(uri)
request.content_type = "application/json"
request.body = '"content":[{"type":"text","text":"'+message+'"}]'
req_options = { use_ssl: uri.scheme == "https" }
response = Net::HTTP.start(uri.hostname, uri.port, req_options) do |http|
http.request(request)
end
puts response.inspect
The response contains the following text.
#<Net::HTTPUnauthorized 401 Unauthorized readbody=true>
Is there something wrong with the request body?
Edit: key and token changed in the question.
This same code worked with stride rooms, the only difference is that it had
request["Authorization"] = "Bearer #{access_token}"
Since the token is already in the uri I figured this would not be needed.

Answer 1

This worked for me
require 'net/http'
require 'uri'
require 'json'
message = 'hello'
# prep and send the http request
uri = URI.parse("//webhook")
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = "application/json"
request.body = { text: message }.to_json
response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
http.request(request)
end
puts response.inspect