Sinatra doesn't know this ditty? - ios

Question

I am trying to setup the Spotify IOS API but everytime I run this Ruby file and go to http://localhost:1234/swap I get "Sinatra doesn't know this ditty".
Here is my code:
require 'sinatra'
require 'net/http'
require 'net/https'
require 'base64'
require 'json'
require 'encrypted_strings'
# This is an example token swap service written
# as a Ruby/Sinatra service. This is required by
# the iOS SDK to authenticate a user.
#
# The service requires the Sinatra and
# encrypted_strings gems be installed:
#
# $ gem install sinatra encrypted_strings
#
# To run the service, enter your client ID, client
# secret and client callback URL below and run the
# project.
#
# $ ruby spotify_token_swap.rb
#
# IMPORTANT: The example credentials will work for the
# example apps, you should use your own in your real
# environment. as these might change at any time.
#
# Once the service is running, pass the public URI to
# it (such as http://localhost:1234/swap if you run it
# with default settings on your local machine) to the
# token swap method in the iOS SDK:
#
# NSURL *swapServiceURL = [NSURL urlWithString:#"http://localhost:1234/swap"];
#
# -[SPAuth handleAuthCallbackWithTriggeredAuthURL:url
# tokenSwapServiceEndpointAtURL:swapServiceURL
# callback:callback];
#
print "\e[31m------------------------------------------------------\e[0m\n"
print "\e[31mYou're using example credentials, please replace these\e[0m\n"
print "\e[31mwith your own and remove this silly warning.\e[0m\n"
print "\e[31m------------------------------------------------------\e[0m\n"
print "\7\7"
sleep(2)
CLIENT_ID = ""
CLIENT_SECRET = ""
ENCRYPTION_SECRET = ""
CLIENT_CALLBACK_URL = "dawgone://returnhere"
AUTH_HEADER = "Basic " + Base64.strict_encode64(CLIENT_ID + ":" + CLIENT_SECRET)
SPOTIFY_ACCOUNTS_ENDPOINT = URI.parse("https://accounts.spotify.com")
set :port, 1234 # The port to bind to.
set :bind, '0.0.0.0' # IP address of the interface to listen on (all)
post '/swap' do
# This call takes a single POST parameter, "code", which
# it combines with your client ID, secret and callback
# URL to get an OAuth token from the Spotify Auth Service,
# which it will pass back to the caller in a JSON payload.
auth_code = params[:code]
http = Net::HTTP.new(SPOTIFY_ACCOUNTS_ENDPOINT.host, SPOTIFY_ACCOUNTS_ENDPOINT.port)
http.use_ssl = true
request = Net::HTTP::Post.new("/api/token")
request.add_field("Authorization", AUTH_HEADER)
request.form_data = {
"grant_type" => "authorization_code",
"redirect_uri" => CLIENT_CALLBACK_URL,
"code" => auth_code
}
response = http.request(request)
# encrypt the refresh token before forwarding to the client
if response.code.to_i == 200
token_data = JSON.parse(response.body)
refresh_token = token_data["refresh_token"]
encrypted_token = refresh_token.encrypt(:symmetric, :password => ENCRYPTION_SECRET)
token_data["refresh_token"] = encrypted_token
response.body = JSON.dump(token_data)
end
status response.code.to_i
return response.body
end
post '/refresh' do
# Request a new access token using the POST:ed refresh token
http = Net::HTTP.new(SPOTIFY_ACCOUNTS_ENDPOINT.host, SPOTIFY_ACCOUNTS_ENDPOINT.port)
http.use_ssl = true
request = Net::HTTP::Post.new("/api/token")
request.add_field("Authorization", AUTH_HEADER)
encrypted_token = params[:refresh_token]
refresh_token = encrypted_token.decrypt(:symmetric, :password => ENCRYPTION_SECRET)
request.form_data = {
"grant_type" => "refresh_token",
"refresh_token" => refresh_token
}
response = http.request(request)
status response.code.to_i
return response.body
end

Answer 1

This is because swap is a POST endpoint. When you pull up a URL in your browser you are doing an HTTP GET.
If you want to see that the sinatra service is running and you can at least talk to it you could try hitting it with curl from the command line with the right POST parameters.