onsdag den 25. juli 2018

Simple website in Azure Function App written in PowerShell

Just as the title says, in this post I will show how to write a simple website using Azure Function App in the still "experimental language" PowerShell. You can skip ahead and view there result here.

Doug Finke already showed how to do this, but in his example you need to write the HTML code yourself. Being the lazy programmer I am, I wanted to use ConvertTo-Html.

I am assuming you are familiar with rolling a Function App. Go ahead and create a HTTP trigger function and language set to PowerShell.

Name it however you like and leave other settings to default.

The real magic happens with the discovery of the -Fragment switch to ConvertTo-Html. It will provide you only with the body, meaning you can combine multiple fragments, and that is exactly what is needed to output HTML in a Function App.

The code part is pretty basic. We have some CSS, some semi-static HTML, and then using ConvertTo-Html to output available PS-modules.

# inline CSS - stole this somewhere, sorry dude, can't remember
$style = @"
h1, h2, h3, h4, h5, th { text-align: center; }
table { margin: auto; font-family: Segoe UI; box-shadow: 10px 10px 5px #888; border: thin ridge grey; }
th { background: #0046c3; color: #fff; max-width: 400px; padding: 5px 10px; }
td { font-size: 11px; padding: 5px 20px; color: #000; }
tr { background: #b8d1f3; }
tr:nth-child(even) { background: #dae5f4; }
tr:nth-child(odd) { background: #b8d1f3; }

# html part - show Azure modules and non-Azure modules available in Function Apps
$html = @"
<title>Hello PS Website</title>
<h1>Hello PS Website</h1>
<h5>Time is $(Get-Date)</h2>
<h2>Azure modules</h2>
$(get-module -ListAvailable | where-object {$ -like "*azure*"} | ConvertTo-Html -Fragment -property Name, version)
<h2>Other modules</h2>
$(get-module -ListAvailable | where-object {$ -notlike "*azure*"} | ConvertTo-Html -Fragment -property Name, version)

# thank you Doug!
    headers = @{ "content-type" = "text/html"}
    body    = $html
} | ConvertTo-Json | Out-File -Encoding Ascii -FilePath $res

The output will look something like this

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