Ruby 寫的 Mail Proxy

光纜還沒修好，公司內部系統有些是放在美國的，不能訪問就不能工作。而且因爲是內部系統，web proxy也不能用。受[url=http://developers.slashdot.org/developers/06/12/31/2321235.shtml]這位亞洲Geek[/url]的啓發，用ruby做了一個mail proxy，用gmail做橋樑，deploy在美國office，從上海office發mail去訪問。

使用效果附圖
1. 發mail
[img]http://cvu.iteye.com/upload/attachment/pic/3463/d63332a8-875f-441d-b769-96f883ee0af5-thumb.jpg[/img]
2. 收到的mail（這是上一版的回覆mail，現在code是把html文件作爲附件的）
[img]http://cvu.iteye.com/upload/attachment/pic/3464/cc83afcd-fe30-4dc7-95a7-d812a92d049c-thumb.jpg[/img]

主要用到
[list=1]
[*] [b]Watir[/b] 用來在那裏打開IE，login，goto link，get html
[*] [b]Gmailer[/b] 用來收發gmail
[*] 還有些小trick，在code裏面都commment說明了一下
[/list]

目前這個程序可以解決一些GET的請求，和GET的form，下一步要做的是，都是些不很緊迫的需求：
[list=1]
[*] form method=post，應該也可以用watir實現。
[*] 直接在mail裏面click或者submit，就可以自動發一封request mail出去，把outlook當瀏覽器使。
[/list]

共享一下代碼。理論上可以訪問任何網站。出於安全，code裏面的公司網站，mail地址都只是例子。code只管拿去用，不要幹壞事。

require 'gmailer'
require 'watir'
include Watir

host = "http://app.company.com"
login = "sa"
pwd = "secret"

gmail_account = 'mail.proxy'
gmail_pwd = 'secret'

msgerr = ""
GMailer.connect(gmail_account, gmail_pwd) do |g|
  g.messages(:read => false).each_msg do |msg|
    body = msg.body.gsub("<WBR>", "").gsub("u003d", "=") # to fix MIME format

    unless body
      # the same subject mails will be regarded as a conversation,
      # we define a rule to avoid that.
      msgerr = "Please do not use the subject that has been used."
    else
      urls = body.scan(/<a href="(.*)".*>\1<\/a>/i).flatten!

      if urls.empty?
        # if get no url, return a error msg.
        msgerr = "Cannot find any URL in the request mail."
      else
        # browser
        browser = IE.new
        browser.goto( host + '/login.asp' )
        browser.text_field( :name, 'loginname' ).set( login )
        browser.text_field( :name, 'password' ).set( pwd )
        browser.button( :name, 'submit2' ).click

        files = []
        for url in urls
          browser.goto(url) # visit the url
          html = browser.html.gsub("href=\"", "href=\"#{/.*\//.match(url)[0]}") # rewrite links 
          html = html.gsub("action=", "action=#{/.*\//.match(url)[0]}") # rewrite form actions, assume method=get 
          filename = url.split("/").last + ".htm"
          File.open(filename, 'w') {|f| f.puts html}
          files << filename
        end
        g.send(:to => msg.sender_email,:subject => "Re: " + msg.subject,:files => files)
        files.each {|f| File.delete(f)}
        browser.close              
      end
    end

    if msgerr
      puts msgerr
      g.send(:to => msg.sender,:subject => "Re: " + msg.subject,:body => msgerr)
    end 
  end
end

[img]