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ShopifyEng/#mirth-5.rb Secret

Last active Mar 25, 2021
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How to Build a Web App with and without Rails Libraries
# Rack app and Rack Requests:
# * Transform Mirth into an application that
# follows the Rack specifications and uses
# Rack::Request to handle requests
# * Use Puma as an application server
require 'yaml/store'
# Require the relevant libraries
require 'rack'
require 'rack/handler/puma'
app = -> environment {
request = Rack::Request.new(environment)
store = YAML::Store.new("mirth.yml")
if request.get? && request.path == "/show/birthdays"
status = 200
content_type = "text/html"
response_message = "<ul>\n"
all_birthdays = {}
store.transaction do
all_birthdays = store[:birthdays]
end
all_birthdays.each do |birthday|
response_message << "<li> #{birthday[:name]}</b> was born on #{birthday[:date]}!</li>\n"
end
response_message << "</ul>\n"
response_message << <<~STR
<form action="/add/birthday" method="post" enctype="application/x-www-form-urlencoded">
<p><label>Name <input type="text" name="name"></label></p>
<p><label>Birthday <input type="date" name="date"></label></p>
<p><button>Submit birthday</button></p>
</form>
STR
elsif request.post? && request.path == "/add/birthday"
status = 303
content_type = "text/html"
response_message = ""
# Instead of decoding the body, we can
# use #params to get the decoded body
new_birthday = request.params
store.transaction do
store[:birthdays] << new_birthday.transform_keys(&:to_sym)
end
else
status = 200
content_type = "text/plain"
response_message = "✅ Received a #{request.request_method} request to #{request.path}"
end
# Return 3-element Array
headers = {
'Content-Type' => "#{content_type}; charset=#{response_message.encoding.name}",
"Location" => "/show/birthdays"
}
body = [response_message]
[status, headers, body]
}
# Run the application with Puma
Rack::Handler::Puma.run(app, :Port => 1337, :Verbose => true)
---
:birthdays:
- :name: Gma
:date: 01/01/2021
- :name: Tom
:date: 02/01/2021
- :name: Sesame
:date: 03/01/2021
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