[Ruby] HTTP request 請求

發送一般的 GET 請求：

begin
  uri = URI("http://localhost:8080/api/v1/languages?limit=-1")
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = uri.scheme == 'https'
  req = Net::HTTP::Get.new(uri, {
    'Content-Type' => 'application/json',
    'Version' => '1'
  })
  res = http.request(req)   # 發送請求

  if res.kind_of? Net::HTTPSuccess
    res_body = JSON.parse(res.body) # 取得回應，並解析 JSON
    languages = res_body['data']['languages']
  end
rescue
  flash.now[:alert] = 'Failed to get option for languages, please try again later.'
end

發送 POST 請求：

# app/controllers/pages_controller.rb
def tester_create
  @tester = Tester.new(tester_params)

  if @tester.valid?
    begin
      uri = URI("#{Rails.application.config.api_url}/tester/create")
      http = Net::HTTP.new(uri.host, uri.port)
      http.use_ssl = uri.scheme == 'https'
      req = Net::HTTP::Post.new(uri.path, {
        'Content-Type' =>'application/json',
        'Version' => '1'
      })
      req.body = {
        name: @tester.name,
        email: @tester.email,
      }.to_json

      res = http.request(req)
      if res.kind_of? Net::HTTPSuccess
        redirect_to tester_confirmation_url, notice: 'Thank you! We will contact you as soon as possible.'
      else
        # 當請求不是 HTTPSuccess 時
        res_body = JSON.parse(res.body)
        flash.now[:alert] = 'Failed to register, please try again later.'
        render :tester
      end
    rescue
      # 當 HTTP Request 有錯誤回應時
      flash.now[:alert] = 'Failed to register, please try again later.'
      render :tester
    end
  else
    flash.now[:notice] = 'Please make sure you have filled in all fields in the form.'
    render :tester
  end
end