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每天一剂Rails良药之Send Gracefully Degrading Rich-Content Emails

    博客分类：
  • Ruby
RailsRuby浏览器HTML 
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针对网页浏览器和手机，我们的Email的content_type分别为"text/html"和"text/plain"
我们可以这样做ruby script\generate mailer Notifier multipart_alternative
app/models/notifier.rb: 
def multipart_alternative(recipient, name, sent_at = Time.now)
  subject      "Something for everyone."
  recipients   recipient
  from         'barnam@chadfowler.com'
  sent_on      sent_at
  content_type "multipart/alternative"

  part :content_type => "text/plain",
       :body => render_message("multipart_alternative_plain", :name => name)
  part :content_type => "text/html",
       :body => render_message("multipart_alternative", :name => name)
end

我们的两套模板:
1，app/views/notifier/multipart_alternative_plain.rhtml 
Hi <%= @name %>!
This is a plain-text message. Enjoy!

2，app/views/notifier/multipart_alternative.rhtml 
<html>
  <body>
    <h1>Hi <%= @name %></h1>
    This is a rich-text message. Enjoy!
  </body>
</html>

甚至我们可以简化它们:
app/models/notifier.rb: 
def implicit_multipart(recipient, name, sent_at = Time.now)
  subject      "Something for everyone."
  recipients   recipient
  from         'barnam@chadfowler.com'
  sent_on      sent_at
  body(:name => name)
end

然后我们通过给app/views/notifier目录下不同的模板名来做content_type区分，如:
implicit_multipart.text.plain.rhtml和implicit_multipart.text.html.rhtml
这样我们就可以隐式的发送针对不同客户端的Email了
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