我有一个 sendgrid 提供的 json URL。它需要被触摸。我该怎么做？
def suspend
@user = User.find(params[:id])
@user.update_attribute("suspended", true)
# the url I need to touch => https://sendgrid.com/api/unsubscribes.add.xml?api_user=username%40website.com&api_key=secret_password&email=#{@user.email}
end
您可以Net::HTTP.get从标准库中使用（请参阅文档）：
require 'net/http'
Net::HTTP.get URI("https://sendgrid.com/api/unsubscribes.add.xml?api_user=username%40website.com&api_key=secret_password&email=#{@user.email}")
更新：
对于 HTTPS，您可以这样做：
require "net/https"
uri = URI.parse("https://www.google.com")
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_NONE
request = Net::HTTP::Get.new(uri.request_uri)
# request = Net::HTTP::Head.new(uri.request_uri) - get response without body
response = http.request(request)
关于这个主题的好文章 - Ruby Net::HTTP Cheat Sheet。
安装 httpclient gem
HTTPClient.get("https://sendgrid.com/api/unsubscribes.add.xml?api_user=username%40website.com&api_key=secret_password&email=#{@user.email}")
也许尝试ActionDispatchGET http://api.rubyonrails.org/classes/ActionDispatch/Request.html#method-i-GET
require 'open-uri'
open("http://pragprog.com/") { |f| f.gets }
结果？只有一行，而不是整个页面：
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\"\n"