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我正在尝试编写一个脚本，powershell该脚本将自动登录到一个使用构建的网站AngularJS并将登录会话存储在一个变量中以供将来登录会话使用。有人可以告诉/告诉我如何解决这个问题吗？预先感谢一百万。

我以前做过，它总是成功地工作，只有在这种情况下，网站是用它构建的，angularJs并且表单InputFields隐藏在“Div”标签中。所以行不通。

这是表单的外观：

<form name="loginForm" class="login-form gf-form-group ng-pristine ng-invalid 
       ng-invalid-required" ng-hide="disableLoginForm">
    <!---->
  <div class="gf-form" ng-if="loginMode">
     <span class="gf-form-label width-7">User</span> 
     <input type="text" name="username" class="gf-form-input max-width-14 ng- 
       pristine ng-untouched ng-empty ng-invalid ng-invalid-required" 
       required="" ng-model="formModel.user" placeholder="email or username">
   </div> 
     <!---->
     <!---->
   <div class="gf-form" ng-if="loginMode">
     <span class="gf-form-label width-7">Password</span> 
     <input type="password" name="password" class="gf-form-input max-width-14 
         ng-pristine ng-untouched ng-empty ng-invalid ng-invalid-required" 
         required="" ng-model="formModel.password" id="inputPassword" 
         placeholder="password">
   </div>
     <!---->
     <!---->
   <div class="gf-form-button-row">
     <button type="submit" class="btn btn-large 
      p-x-3 btn-inverse" ng-click="submit();" ng-class="{'btn-inverse': 
      !loginForm.$valid, 'btn-primary': loginForm.$valid}">Log in</button>
   </div>
</form>

这是我写的脚本（我通常使用的）：

$LoginResponse = Invoke-WebRequest 'https://mywebsite/login' -SessionVariable 'sVar'

$Body = @{loginForm = $LoginResponse.ParsedHtml.forms[0].elements['loginForm'].value
    username = 'MyUsername'
    password = 'MyPassword'
}

$LoginResponse = Invoke-WebRequest 'https://mywebsite/login' -WebSession $Session -Body $Body -Method 'POST'

这是我在运行脚本时遇到的错误Powershell：

Cannot index into a null array.
At line:3 char:1
+ $Body = @{
+ ~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArray

Invoke-WebRequest : [{"fieldNames":["User"],"classification":"RequiredError","message":"Required"}]
At line:10 char:18
+ ... nResponse = Invoke-WebRequest 'https://mywebsite/login' -WebSessi ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-WebRequest], WebException
    + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeWebRequestCommand
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