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app.rb
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app.rb
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require 'bundler/setup'
Bundler.require(:default)
require_relative 'lib/webhook'
class App < Sinatra::Base
configure :production, :development do
enable :logging
end
before do
@request_body = request.body.read
end
post '/webhook' do
verify_signature!
payload = parse_payload
begin
member_params = Webhook.handle!(payload)
rescue Webhook::UnkownStoreError, Webhook::IgnoredStatusError => e
logger.info "#{e.class} - #{e.message}"
rescue Webhook::MemberCreationError => e
logger.info payload
logger.info member_params
logger.info "#{e.class} - #{e.message}"
rescue TypeError => e
logger.info payload
logger.info "#{e.class} - #{e.message}"
end
status 204
end
private
def verify_signature!
signature = request.env['HTTP_X_WC_WEBHOOK_SIGNATURE']
secret = ENV['WEBHOOK_SECRET']
computed_hmac = Base64.strict_encode64(
OpenSSL::HMAC.digest('sha256', secret, @request_body))
unless signature && Rack::Utils.secure_compare(computed_hmac, signature)
halt 403, 'Forbidden'
end
end
def parse_payload
JSON.parse(@request_body)
rescue JSON::ParserError
halt 400, 'Invalid JSON'
end
end