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greenlight/lib/bbb_api.rb

79 lines
2.5 KiB
Ruby

# frozen_string_literal: true
module BbbApi
RETURNCODE_SUCCESS = "SUCCESS"
def bbb_endpoint
Rails.configuration.bigbluebutton_endpoint
end
def bbb_secret
Rails.configuration.bigbluebutton_secret
end
# Sets a BigBlueButtonApi object for interacting with the API.
def bbb(user_provider)
if Rails.configuration.loadbalanced_configuration
user_domain = retrieve_provider_info(user_provider)
BigBlueButton::BigBlueButtonApi.new(remove_slash(user_domain["apiURL"]), user_domain["secret"], "0.8")
else
BigBlueButton::BigBlueButtonApi.new(remove_slash(bbb_endpoint), bbb_secret, "0.8")
end
end
# Rereives info from the loadbalanced in regards to a Provider (or tenant).
def retrieve_provider_info(provider, api = 'api', route = 'getUser')
# Include Omniauth accounts under the Greenlight provider.
raise "Provider not included." if !provider || provider.empty?
cached_provider = Rails.cache.fetch("#{provider}/#{route}")
# Return cached result if the value exists and cache is enabled
return cached_provider if !cached_provider.nil? && Rails.configuration.enable_cache
# Build the URI.
uri = encode_bbb_url(
"#{Rails.configuration.loadbalancer_endpoint}#{api}/",
Rails.configuration.loadbalancer_secret,
{ name: provider },
route
)
logger.info uri
# Make the request.
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = (uri.scheme == 'https')
response = http.get(uri.request_uri)
# Parse XML.
doc = XmlSimple.xml_in(response.body, 'ForceArray' => false)
raise doc['message'] unless response.is_a?(Net::HTTPSuccess)
# Return the user credentials if the request succeeded on the loadbalancer.
Rails.cache.fetch("#{provider}/#{route}", expires_in: 1.hours) do
doc['user']
end
return doc['user'] if doc['returncode'] == 'SUCCESS'
raise "User with provider #{provider} does not exist." if doc['messageKey'] == 'noSuchUser'
raise "API call #{url} failed with #{doc['messageKey']}."
end
# Builds a request to retrieve credentials from the load balancer.
def encode_bbb_url(base_url, secret, params, route = 'getUser')
encoded_params = params.to_param
string = route + encoded_params + secret
checksum = OpenSSL::Digest.digest('sha1', string).unpack1('H*')
URI.parse("#{base_url}#{route}?#{encoded_params}&checksum=#{checksum}")
end
# Removes trailing forward slash from a URL.
def remove_slash(s)
s.nil? ? nil : s.chomp("/")
end
end