AzureFunctions.ps1

Write-Output "PowerShell Timer trigger function executed at:$(get-date)";

$uri = "https://bing.com"
$poorsodnumber = "+44........"

if ((Invoke-WebRequest -Uri $uri -UseBasicParsing).StatusCode -eq 200) { write-output "$uri is UP" } else 
{ 
    Write-Output "$uri is DOWN. Sending SMS." 
    # Pull in Twilio account info, previously set as environment variables
    $sid = $env:TWILIO_ACCOUNT_SID 
    $token = $env:TWILIO_AUTH_TOKEN 
    $number = $env:TWILIO_NUMBER 

    # Twilio API endpoint and POST params
    $url = "https://api.twilio.com/2010-04-01/Accounts/$sid/Messages.json"
    $params = @{ To = "$poorsodnumer"; From = $number; Body = "$uri is down!! OMG!!" }

    # Create a credential object for HTTP basic auth
    $p = $token | ConvertTo-SecureString -asPlainText -Force
    $credential = New-Object System.Management.Automation.PSCredential($sid, $p)

    # Make API request, selecting JSON properties from response
    Invoke-WebRequest $url -Method Post -Credential $credential -Body $params -UseBasicParsing |
    ConvertFrom-Json | Select sid, body
}