ruby – Mechanize cookie_jar不保存会话令牌

我的问题是cookie_jar.save方法不会将会话cookie /令牌保存到cookie文件中.这是一个演示这个的简单示例：

require 'mechanize'

# Setup Mechanize agents
agent1 = Mechanize.new
agent2 = Mechanize.new

# Fetch page and save cookies to local file
agent1.get ('http://www.my-secure-website.com')
agent1.post('http://www.my-secure-website.com/login',{
    'user[login]' => 'my_login','user[password]' => 'my_password','submit' => 'Login'
})

# Verify and save cookies
agent1.cookie_jar.save_as 'cookies'
p agent1.cookie_jar
# #<Mechanize::CookieJar:0x8cf60b8 @jar={"www.my-secure-website.com"=>{"/"=>{"JSESSIONID"=>JSESSIONID=1NqLRc4dm0Qp5465N82Zwz4N0yXxy5jP1pXpyKp9jG8ssX2nMp5q!-334818122},"/login/"=>{"Account"=>Account=my_account_number}},"evr.my-secure-website.com"=>{"/APBDBQ"=>{"JSESSIONID"=>JSESSIONID=A74D230DEAFF50098557FBE76DD2E0C5}}}


########################################################
# Now let's load cookies into the second Mechanize agent

# Version 1 - This works only partially. Session cookies are missing:
agent2.cookie_jar.load 'cookies'
p agent2.cookies
# [
#    [0] Account=my_account_number
# ]
p agent2.cookie_jar
# #<Mechanize::CookieJar:0x914c658 @jar={"www.my-secure-website.com"=>{"/"=>{},"evr.my-secure-website.com"=>{"/APBDBQ"=>{}}}>


# Version 2 - This works,but cannot be saved into file/db!
agent2.cookie_jar = agent1.cookie_jar
p agent2.cookies
# [
#    [0] JSESSIONID=1NqLRc4dm0Qp5465N82Zwz4N0yXxy5jP1pXpyKp9jG8ssX2nMp5q!-334818122,#    [1] Account=my_account_number,#    [2] JSESSIONID=A74D230DEAFF50098557FBE76DD2E0C5
# ]
p agent2.cookie_jar
# #<Mechanize::CookieJar:0x8cf60b8 @jar={"www.my-secure-website.com"=>{"/"=>{"JSESSIONID"=>JSESSIONID=1NqLRc4dm0Qp5465N82Zwz4N0yXxy5jP1pXpyKp9jG8ssX2nMp5q!-334818122},"evr.my-secure-website.com"=>{"/APBDBQ"=>{"JSESSIONID"=>JSESSIONID=A74D230DEAFF50098557FBE76DD2E0C5}}}>

这就是我保存的cookie文件的样子：

---
www.my-secure-website.com:
  /: {}
  /login/:
    Account: !ruby/object:Mechanize::Cookie
     version: 0
     port: 
     discard: 
     comment_url: 
     expires: Thu,22 May 2014 07:48:46 GMT
     max_age: 
     comment: 
     secure: true
     path: /login/
     domain: www.my-secure-website.com
     accessed_at: 2013-05-22 00:48:47.227628764 -07:00
     created_at: 2013-05-22 00:48:47.227628764 -07:00
     name: Account
     value: S4633
     for_domain: false
     domain_name: !ruby/object:DomainName
       ipaddr: 
       hostname: www.my-secure-website.com
       uri_host: www.my-secure-website.com
       tld: com
       canonical_tld_p: true
       domain: my-secure-website.com
     session: false
evr.my-secure-website.com:
  /APBDBQ: {}

您可以在控制台输出中看到会话令牌(JSESSIONID),但它在本地cookie文件中缺失.我的问题是,我如何使Mechanize.cookie_jar.save_as也保存会话数据？