使用机械化登录表单

Question

我知道Stackoverflow上也有类似的帖子，但我似乎仍然不知道我的尝试出了什么问题。

# login to the site 
mech.get(base_URL) do |page|
  l = page.form_with(:action => "/site/login/") do |f|
    username_field = f.field_with(:name => "LoginForm[username]")
    username_field.value = userName
    password_field = f.field_with(:name => "LoginForm[password]")
    password_field.value = password
    f.submit
  end
end

这是我的错误：

rb:18:in `block (2 levels) in <main>': undefined method `field_with' for nil:NilClass (NoMethodError)

这是HTML

<div class="bucketbody">
    <div class="form padding10">
    <form id="login-form" action="/site/login" method="post">
        <div class="row">
            <p class="note float_right">Fields with <span class="required">*</span> are required.</p>
            <label for="LoginForm_username" class="required">Email address <span class="required">*</span></label>              <input class="width_66per" autofocus="" name="LoginForm[username]" id="LoginForm_username" type="text">                         </div>
        <div class="row">
            <label for="LoginForm_password" class="required">Password <span class="required">*</span></label>               <input class="width_66per" name="LoginForm[password]" id="LoginForm_password" type="password">                          </div>
                    <div class="row rememberMe nolabel">
            <span class="field"><input id="ytLoginForm_rememberMe" value="0" name="LoginForm[rememberMe]" type="hidden"><input name="LoginForm[rememberMe]" id="LoginForm_rememberMe" value="1" type="checkbox">                <label for="LoginForm_rememberMe">Remember me on this computer</label>                              </span>
        </div>
        <p class="note"><a href="http://test.XXXXXXXX.com/user/reset">Forgot your password?</a></p>
        <div class="row buttons" style="padding-left: 0px;">
            <input class="pushButton" name="yt0" value="Login" type="submit">           </div>
    </form>     </div><!-- form -->
</div>

p页

#<Mechanize::Page
 {url #<URI::HTTP:0x225ce70 URL:http://xxxxxx.com/>}
 {meta_refresh}
 {title "xxxxxxxxxxx | xxxxxxxxx"}
 {iframes}
 {frames}
 {links
  #<Mechanize::Page::Link "rn                        " "/">
  #<Mechanize::Page::Link "About xxxxxx" "/features">
  #<Mechanize::Page::Link "xxxxx Overview" "/features">
  #<Mechanize::Page::Link "xxxxxxx for Associations" "/associations">
  #<Mechanize::Page::Link "xxxxxx For Education" "/education">
  #<Mechanize::Page::Link "FAQ" "/faq">
  #<Mechanize::Page::Link "About Us" "/aboutus">
  #<Mechanize::Page::Link "About Us" "/aboutus">
  #<Mechanize::Page::Link "News & Events" "/news-events">
  #<Mechanize::Page::Link "Environmental Commitment" "/environment">
  #<Mechanize::Page::Link "Our Team" "/ourteam">
  #<Mechanize::Page::Link "The xxxxxxxxxx" "/xxxxxxxxxx">
  #<Mechanize::Page::Link "Free Trial" "/freetrial">
  #<Mechanize::Page::Link "Contact" "/contacts">
  #<Mechanize::Page::Link "Contact us" "/contacts">
  #<Mechanize::Page::Link
   "xxxxxxxxxx"
   "http://www.xxxxxxxx.com/services/web-services/">
  #<Mechanize::Page::Link
   "[e-mail]"
   "mailto:[e-mail]">
  #<Mechanize::Page::Link xxxxxx" "http://www.xxxxxxxxx.com/">
  #<Mechanize::Page::Link
   "Technology Association of Oregon"
   "http://www.techoregon.org/">
  #<Mechanize::Page::Link "" "http://www.terrapass.com/">
  #<Mechanize::Page::Link "" "http://www.arborday.org/">}
 {forms}>

Answer 1

你让它变得比需要的更复杂：

page = mech.get base_URL
form = page.form # page.forms[1], etc.
form['LoginForm[username]'] = userName
form['LoginForm[password]'] = password
l = form.submit form.button

Answer 2

为什么不直接发送发布请求？试试这个：

respond = mech.post('www.mysite.com/site/login', "LoginForm[username]" => userName,    "LoginForm[password]" => password)

如果你知道目标（/site/login）、请求方法（post）和你必须发送的参数，那么在不干扰表单的情况下进行post请求

如果有效，请告诉我。

Answer 3

试试这个：

mech.get(base_URL) do |page|
  l = page.form_with(:action => "/site/login") do |f|
    username_field = f.field_with(:name => "LoginForm[username]")
    username_field.value = userName
    password_field = f.field_with(:name => "LoginForm[password]")
    password_field.value = password
  end.submit
end

我在:action => "/site/login/"的末尾丢弃了/，并将submit直接链接在块之后，如在机械化示例页面中那样。不过我没有运行代码，所以让我知道它是否有效。