未完成的 trackback 功能

本來想實在此功能,但發現 XDite 目前也是需要手動填入 trackback . 所以看到一半放棄,此文紀錄一些查到的資料,跟我實作到一半的步驟.

1. 編寫 send_trackback 的 task ,內容修改自 XDite 範本.

 
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require 'rake'
require 'rake/testtask'
require 'rake/rdoctask'

namespace :utils do
 
  # 送出 trackback .
  def send_trackback(trackback)
    title = "MAPLOG notification" # 主旨.
    post_url = "http://maplog.twgg.org/" + trackback.post.id.to_s # 哪篇文章引用.
    blog_name = "MAPLOG 地圖碎碎念" # 來源的站名.
    content = trackback.post.user.login + " MAPLOG 引用了這篇文章." #　引用內容.
    url = trackback.trackback_url
    uri = URI.parse(url)
    poststring = URI.escape("title=" + title + 
        "&url=" + post_url + 
        "&excerpt=" + content + 
        "&blog_name=" + blog_name)
    request = Net::HTTP.new(uri.host, uri.port)
    begin
      response = request.post(url.gsub(/http:\/\/#{uri.host.to_s}/,''), poststring)
      puts response.body
    rescue
      puts "fail"
    end
  end

  desc "This task will sent trackback"
  task :send_trackback => :environment do
    puts "sending trackback..."
    @trackbacks = Trackback.find(:all, :conditions => "status is NULL")

    for trackback in @trackbacks
      send_trackback(trackback)
      trackback.status = "sent"
      trackback.save
    end
  end
  
end

2. 檔名存為 rakefile.rake 存至 RailsApp/Libs/taks 下.

3. 在 RailsApp Console 下鍵入 rake -T ,看到最下面出現 utils:send_trackback ,代表新寫的 task 已經加到 task 列表中.

4. 利用 cronjob (定期) 執行 task (執行繁瑣工作).

延伸閱讀:

• Ruby on Rails中的Rake教程(Rake如何把我灌醉!)


• cronjobs


• [Ruby] 發送 Trackback 的實作方法