使用Ruby和Mechanize填写远程登录表单的谜团
我正在尝试实现一个Ruby脚本，它将接收用户名和密码，然后继续在另一个网站上的登录表单上填写帐户详细信息，然后返回，然后按照链接并检索帐户历史记录。 为此，我使用的是Mechanize gem。
我一直关注这里的例子，但我似乎无法让它发挥作用。 我已经大大简化了这一点，试图让它在部分工作，但一个假设的简单填写forms正在阻碍我。
这是我的代码：
# script gets called with a username and password for the site require 'mechanize' #create a mechanize instant agent = Mechanize.new agent.get('https://mysite/Login.aspx') do |login_page| #fill in the login form on the login page loggedin_page = login_page.form_with(:id => 'form1') do |form| username_field = form.field_with(:id => 'ContentPlaceHolder1_UserName') username_field.value = ARGV[0] password_field = form.field_with(:id => 'ContentPlaceHolder1_Password') password_field.value = ARGV[1] button = form.button_with(:id => 'ContentPlaceHolder1_btnlogin') end.submit(form , button) #click the View my history link #account_history_page = loggedin_page.click(home_page.link_with(:text => "View My History")) ####TEST to see if i am actually making it past the login page #### and that the View My History link is now visible amongst the other links on the page loggedin_page.links.each do |link| text = link.text.strip next unless text.length > 0 puts text if text == "View My History" end ##TEST end 终端错误消息：
stackqv2.rb:19:in `block in ': undefined local variable or method `form' for main:Object (NameError) from /usr/local/lib/ruby/gems/1.9.1/gems/mechanize-2.5.1/lib/mechanize.rb:409:in `get' from stackqv2.rb:8:in `'
您无需将form作为参数传递即可submit 。 该button也是可选的。 尝试使用以下内容：
loggedin_page = login_page.form_with(:id => 'form1') do |form| username_field = form.field_with(:id => 'ContentPlaceHolder1_UserName') username_field.value = ARGV[0] password_field = form.field_with(:id => 'ContentPlaceHolder1_Password') password_field.value = ARGV[1] end.submit
如果您确实需要指定用于提交表单的按钮，请尝试以下操作：
form = login_page.form_with(:id => 'form1') username_field = form.field_with(:id => 'ContentPlaceHolder1_UserName') username_field.value = ARGV[0] password_field = form.field_with(:id => 'ContentPlaceHolder1_Password') password_field.value = ARGV[1] button = form.button_with(:id => 'ContentPlaceHolder1_btnlogin') loggedin_page = form.submit(button)
这是一个范围问题：
page.form do |form| # this block has its own scope form['foo'] = 'bar' # <- ok, form is defined inside this block end puts form # <- error, form is not defined here
ramblex的建议是不要在你的表格中使用一个块，我同意，这样就不那么混乱了。