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Audit and Consulting of Information Systems and Business Processes
Microsoft PowerShell
As already described on elsewhere on the Internet and on Microsoft Connect, the new Invoke-WebRequest Cmdlet, that comes with PowerShell v3, handles form fields incorrectly. Instead of referring to the name attributes of input elements within a form the Fields Collection stores the ids of the attributes under the ‘key’ property. As in the following example you see the text […]
[UPDATE 2014-04-08] Thanks to Meir I updated the post as the code was missing the definition for the regular expression. Now I corrected that, so the code should work now. In addition, I found out that the apple web server is not serving ‘Set-Cookie’ header according to RFC so I changed the example from apple.com to google.ch (as we are […]
I recently had the need to automatically retrieve and process emails. As I am using Office365 what could have been closer than trying to retrieve the emails via PowerShell and EWS. What I was not aware of is that the supplied Cmdlets that come with the “MSOnlineExtended” module only really deal with account and administration. And the Cmdlet in the […]
The other day I was using Fiddler to examine some web traffic to automate some tasks. I then stumbled upon a cool Fiddler extension called Request to Code (by Chad Sowald), which takes any HTTP(s) request and converts it to C# code using the System.Net.WebRequest and System.Net.WebResponse classes. Unfortunately, the extension does not support PowerShell. As I am using the […]
When trying to define a RepitionInterval on a schedule job of less than one minute you receive the following error message: However, there is a workaround on this: you define additional triggers that fire every minute and have them start eg. every 15 seconds: There is a maximum of 48 triggers you can define for any one PowerShell scheduled job […]
When using scheduled jobs in PowerShell v3 you can pass parameters to the scheduled job via the “ArgumentList” parameter. However, you can only pass values via its position (instead via its name) as the parameter expects an array of objects: So it is not possible to run any of your scripts as “scheduled jobs” when they expect only names parameters. […]
Serialising and Deserialising data structures is pretty easy when using Export-CliXml/Import-CliXml. However, there are some gotchas. In addition to the already described bug when using [ordered] hashtable in PowerShell v3 with Import-CliXml there is another error when importing [Array] with Import-CliXml: an [Array] becomes an [ArrayList]. The following code shows the problem: Again, this error seems to occur when you do […]
With the advent of PowerCLI for vCloud Director the reasons for using vCenter Orchestrator (vCO) blur even more. VMware provides us several CmdLets that we can all find in the “VMware.VimAutomation.Cloud” snapin (“Get-Command -Module VMware.VimAutomation.Cloud”). Sure this library is by far not perfect, there is quite some functionality. However, when using the “Get-CiVm” CmdLet you will probably find out quickly […]
The new powershell feature “ordered” hashtable (a new PowerShell feature in v3. See OrderedDictionary Class) becomes an ordinary hashtable when it is imported via Import-CliXml. There is a “active” bug on Microsoft Connect OrderedDictionary becomes Hashtable when exported to and imported from clixml but no action for a couple of months. As a workaround do not use ordered hashtables but […]
Here a few coding considerations that might make you life easer when dealing with PowerShell (but may also hold true for other programming languages): Hide unwanted return information in your code In PowerShell your functions and CmdLets return everything that is output within the function – even if you use an explicit return statement. To avoid unwanted returns from there […]
Microsoft PowerShell allows us to create, read and write performance counters via .NET with ease (check PerformanceCounterCategory in System.Diagnostics). However, there are some gotchas when trying it the first time …
This entry gives a quick overview about the PowerShell verbs to use when abstracting CRUD operations into PowerShell CmdLets.
[UPDATE 2014-11-16] The module is now available on NuGet. See below for download link. [UPDATE 2014-10-13] I split the module into separate PS1 files (one per cmdlet/function) and created a manifest for it. Now you can use a prefix and change the name of the cmdlets (the default prefix is ‘Ctera’). Here you find the PowerShell module that you can […]
[UPDATE 2015-12-22] The module is now available on PowerShell Gallery. [UPDATE 2014-11-15] The module is now available on NuGet. This module allows you to have a unified logging in PowerShell and all your scripts. It depends on log4net and thus provides great flexibility on how and where you log. Basic usage is as follows: Main configuration is defined in the […]
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