2016年10月8日土曜日

開発環境

Head First Ruby (Jay McGavren (著)、O'Reilly Media)のChapter 15.(Saving and Loading Data: Keep It Around)、Setting up a Sinatra route for a POST request、EXERCISE(No. 7718)を取り組んでみる。

EXERCISE(No. 7718)

コード(Emacs)

#!/usr/bin/env ruby2.3
# -*- coding: utf-8 -*

require 'sinatra'

get('/form') do
  erb :form
end

post('/convert') do
  fahrenheit = @params['temperature'].to_f
  celsius = (fahrenheit - 32) / 1.8
  format("%0.1f degrees Faharenheit is %0.1f degrees Celsius.",
         fahrenheit, celsius)
end

<!doctype html>
<html>
  <body>
    <form method="post" action="/convert">
      <label for="temperature">Degrees Fahrenheit:</label>
      <input id="temperature" type="text" name="temperature">
      <input type="submit">
    </form>
  </body>
</html>

入出力結果(Terminal)

$ ./app.rb
[2016-10-09 00:46:02] INFO  WEBrick 1.3.1
[2016-10-09 00:46:02] INFO  ruby 2.3.1 (2016-04-26) [x86_64-darwin15]
== Sinatra (v1.4.7) has taken the stage on 4567 for development with backup from WEBrick
[2016-10-09 00:46:02] INFO  WEBrick::HTTPServer#start: pid=35901 port=4567
::1 - - [09/Oct/2016:00:46:06 +0900] "GET / HTTP/1.1" 404 462 0.0323
::1 - - [09/Oct/2016:00:46:06 JST] "GET / HTTP/1.1" 404 0
- -> /
::1 - - [09/Oct/2016:00:46:08 +0900] "GET / HTTP/1.1" 404 462 0.0015
::1 - - [09/Oct/2016:00:46:08 JST] "GET / HTTP/1.1" 404 462
- -> /
::1 - - [09/Oct/2016:00:46:09 +0900] "GET /form HTTP/1.1" 200 237 0.0103
::1 - - [09/Oct/2016:00:46:09 JST] "GET /form HTTP/1.1" 200 237
- -> /form
::1 - - [09/Oct/2016:00:46:10 +0900] "GET /form HTTP/1.1" 200 237 0.0066
::1 - - [09/Oct/2016:00:46:10 JST] "GET /form HTTP/1.1" 200 237
- -> /form
::1 - - [09/Oct/2016:00:46:16 +0900] "POST /convert HTTP/1.1" 200 49 0.0015
::1 - - [09/Oct/2016:00:46:16 JST] "POST /convert HTTP/1.1" 200 49
http://localhost:4567/form -> /convert
  C-c C-c== Sinatra has ended his set (crowd applauds)
[2016-10-09 00:46:21] INFO  going to shutdown ...
[2016-10-09 00:46:22] INFO  WEBrick::HTTPServer#start done.
$ 

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