Created
September 23, 2020 17:54
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Hosts a random govdesign poster
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| require 'base64' | |
| require 'http' | |
| require 'rufus-scheduler' | |
| require 'sinatra' | |
| GH_URL = 'https://api.github.com/repos/alphagov/govdesign/contents' | |
| STATE = { | |
| lock: Mutex.new, | |
| bytes: nil, | |
| } | |
| SCHEDULER = Rufus::Scheduler.new | |
| LOADING_TEMPLATE = <<~HTML.freeze | |
| <!doctype HTML> | |
| <html> | |
| <head><title>govdesign.cloudapps.digital</title></head> | |
| <body>loading</body> | |
| </html> | |
| HTML | |
| PAGE_TEMPLATE = <<~HTML.freeze | |
| <!doctype HTML> | |
| <html> | |
| <head><title>govdesign.cloudapps.digital</title></head> | |
| <body style="display: flex; justify-content: center; align-items: center;"> | |
| <main id="pdf"> | |
| <embed width="700" height="700" src="/poster.pdf#toolbar=0&navpanes=0&scrollbar=0&statusbar=0&messages=0&scrollbar=0"> | |
| </embed> | |
| </main> | |
| </body> | |
| </html> | |
| HTML | |
| def get_random_poster | |
| files = JSON.parse(HTTP.get(GH_URL).to_s) | |
| pdfs = files.select { |f| f['name'] =~ /[.]pdf$/ } | |
| posters = pdfs.select { |p| p['name'] =~ /poster/i } | |
| small_posters = posters.select { |p| p['size'] < 204800 } | |
| poster = small_posters.shuffle.first | |
| poster_url = poster['download_url'] | |
| bytes = HTTP.follow.get(poster_url).to_s | |
| STATE[:lock].synchronize { STATE[:bytes] = bytes } | |
| end | |
| SCHEDULER.every('15m') { get_random_poster } | |
| get_random_poster | |
| set :port, 8080 | |
| get '/' do | |
| bytes = STATE[:lock].synchronize { STATE[:bytes] } | |
| if bytes.nil? | |
| LOADING_TEMPLATE | |
| else | |
| PAGE_TEMPLATE | |
| end | |
| end | |
| get '/poster.pdf' do | |
| content_type 'application/pdf' | |
| STATE[:lock].synchronize { STATE[:bytes] } | |
| end |
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