/
app.rb
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/
app.rb
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# Copyright 2017 Google, Inc
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# [START all]
require "digest/sha2"
require "sinatra"
require "sequel"
DB = Sequel.postgres user: ENV["POSTGRES_USER"],
password: ENV["POSTGRES_PASSWORD"],
database: ENV["POSTGRES_DATABASE"],
host: ENV["POSTGRES_SOCKET_PATH"]
get "/" do
# Store a hash of the visitor's ip address
visitor_ip = Digest::SHA256.hexdigest request.ip
# Save visit in database
DB[:visits].insert user_ip: visitor_ip, timestamp: Time.now
# Retrieve the latest 10 visit records from the database
visits = DB[:visits].limit(10).order Sequel.desc(:timestamp)
response.write "Last 10 visits:\n"
visits.each do |visit|
response.write "Time: #{visit[:timestamp]} Addr: #{visit[:user_ip]}\n"
end
content_type "text/plain"
status 200
end
# [END all]