我正在编写一个ruby应用程序,可以代表用户将评论发布到远程博客。我的问题是我必须在控制器的post方法中使用相同的页面,以使会话保持活动状态。填写验证码:
应用/控制器/ comment_controller.rb
require 'mechanize'
class CommentController < ApplicationController
def new
agent = Mechanize.new
@page = agent.get('http://blog.example.com')
@captcha_src = @page.search("//div[@id='recaptcha_image']").search("//img")[1].attribute("src")
#etc.
end
def post_comment
# insert captcha, username, password + text into the form
agent.submit(@page.form[0], @page.form[0].buttons.submitbutton) # Problem: page instance variable doesn't exist anymore
end
end
我已经尝试在Rails.cache中保存page-instance-variable,但是机械化的页面无法编组为字符串。
答案 0 :(得分:0)
我写了一个有效的解决方案。它将隐藏变量和cookie保存在base64编码的字符串中,该字符串在隐藏字段中的请求之间进行传输。下面是构建的代码:
require 'mechanize'
require 'stringio'
require 'base64'
class MechanizeWrapper
attr_reader :page, :agent
def initialize(url, useproxy = true)
@agent = Mechanize.new
@page = @agent.get(url)
end
def get_state()
hidden_fields = {}
cookie_jar = StringIO.new
@page.search("//input[@type='hidden']").each do |hidden|
hidden_fields[hidden.path]=hidden.attribute('value').to_s
end
@agent.cookie_jar.dump_cookiestxt(cookie_jar);
state = {:hidden_fields => hidden_fields.inspect, :cookie_jar => cookie_jar.string}
Base64.encode64(state.inspect)
end
def put_state(state_enc)
state = eval(Base64.decode64(state_enc))
eval(state[:hidden_fields]).each do |path,value|
@page.search(path).first['value'] = value
end
cookie_jar = StringIO.new(state[:cookie_jar])
@agent.cookie_jar.load_cookiestxt(cookie_jar)
end
end