Adding GET HEAD and POST Verbs in IIS Powershell

Question

I am trying to add three HTTP request filters to my applicationhost.config file using the below:

Set-WebConfigurationProperty -PSPath 'MACHINE/WEBROOT/APPHOST' -Filter 'system.webServer/security/requestFiltering/verbs' -Value @{VERB="GET";allowed="True"} -Name collection
Set-WebConfigurationProperty -PSPath 'MACHINE/WEBROOT/APPHOST' -Filter 'system.webServer/security/requestFiltering/verbs' -Value @{VERB="HEAD";allowed="True"} -Name collection
Set-WebConfigurationProperty -PSPath 'MACHINE/WEBROOT/APPHOST' -Filter 'system.webServer/security/requestFiltering/verbs' -Value @{VERB="POST";allowed="True"} -Name collection

However, each subsequent line overrides the previous one and I can only add one line it seems. I want to add all three like this:

        <verbs allowUnlisted="false">
            <add verb="GET" allowed="true" />
            <add verb="HEAD" allowed="true" />
            <add verb="POST" allowed="true" />
        </verbs>

All I end up with is the first GET being written then HEAD overriding the GET and then POST overriding the GET ...I just want all three listed.

Any ideas?

Answer 1

When you use the Set-WebConfigurationProperty cmdlet, you effectively override the current value of the config section element in question.

If you want to append values to multi-valued properties, you should use Add-WebConfigurationProperty instead:

Add-WebConfigurationProperty -PSPath 'MACHINE/WEBROOT/APPHOST' -Filter 'system.webServer/security/requestFiltering' -Value @{VERB="GET";allowed="True"} -Name Verbs -AtIndex 0
Add-WebConfigurationProperty -PSPath 'MACHINE/WEBROOT/APPHOST' -Filter 'system.webServer/security/requestFiltering' -Value @{VERB="HEAD";allowed="True"} -Name Verbs -AtIndex 1
Add-WebConfigurationProperty -PSPath 'MACHINE/WEBROOT/APPHOST' -Filter 'system.webServer/security/requestFiltering' -Value @{VERB="POST";allowed="True"} -Name Verbs -AtIndex 2

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If you want to make sure that only these three verbs exist in the collection, use Clear-WebConfiguration before you add them:

Clear-WebConfiguration -PSPath 'MACHINE/WEBROOT/APPHOST' -Filter 'system.webServer/security/requestFiltering/verbs'