Azure Functions, event log trigger.ps1

# Replace with your Workspace ID
$CustomerID = $REQ_PARAMS_LogAnalyticsCustomerID
# Replace with your Log Analytics workspace Primary Key
$SharedKey = $REQ_PARAMS_LogAnalyticsPrimaryKey
#Specify the name of the record type that we'll be creating.
$LogType = $REQ_PARAMS_LogType # To be used to search for as a custom log e.g. Type=iTunesPopCharts2_CL
# Specify a time in the format YYYY-MM-DDThh:mm:ssZ to specify a created time for the records
$TimeStampField = ''
# Telstra DEV APIs - https://dev.telstra.com
$Telstra_app_key = $REQ_PARAMS_Telstra_app_key
$Telstra_app_secret = $REQ_PARAMS_Telstra_app_secret
$tel_numbers = $REQ_PARAMS_tel_numbers
$message = $REQ_PARAMS_Message
# Message to send
$LAmessage = [PSCustomObject]@{
Channel = 'Azure Automation Webhook'
message = $message
}

function Send-TelstraSMS ($tel_numbers, $body) {
################# Get Telstra API access - https://dev.telstra.com/
[System.Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
$UriToken = "https://tapi.telstra.com/v2/oauth/token"

$body = @{
client_id = $Telstra_app_key
client_secret = $Telstra_app_secret
grant_type = 'client_credentials'
scope = 'NSMS'
}
$contentType = 'application/x-www-form-urlencoded' 
$auth_values = Invoke-RestMethod -Uri $UriToken -body $body -ContentType $contentType -Method Post

################# Provisioning - a 30 day mobile number
$token = $auth_values.access_token
$UriProvisioning = "https://tapi.telstra.com/v2/messages/provisioning/subscriptions"

$headers = @{
'Authorization' = "Bearer $token"
'cache-control' = 'no-cache'
}

$JSON = @{
activeDays = 30
notifyURL = 'http://example.com/callback'
callbackData = @{"anything" = "some data"}
} | ConvertTo-Json
$JSON
$contentType = 'application/json' 
$MobileNumberRaw = Invoke-RestMethod -Uri $UriProvisioning -ContentType $contentType -Headers $headers -Method Post -body $JSON

################# Send SMS
$MobileNumber = $MobileNumberRaw.destinationAddress
$token = $auth_values.access_token
$UriSend = "https://tapi.telstra.com/v2/messages/sms"

$JSON = @{
to = @($tel_numbers)
body = $message
} | ConvertTo-Json
$JSON = $JSON -replace '\\u0027', '"' -replace '""', '"'
$JSON
$headers = @{
'Authorization' = "Bearer $token"
'cache-control' = 'no-cache'
}
$contentType = 'application/json'
$sent_message = Invoke-RestMethod -Uri $UriSend -ContentType $contentType -Headers $headers -Method Post -Body $JSON
###########################################################
}

# Function to create the authorization signature.
Function New-Signature ($CustomerID, $SharedKey, $date, $contentLength, $method, $contentType, $resource)
{
$xHeaders = 'x-ms-date:' + $date
$stringToHash = $method + "`n" + $contentLength + "`n" + $contentType + "`n" + $xHeaders + "`n" + $resource

$bytesToHash = [Text.Encoding]::UTF8.GetBytes($stringToHash)
$keyBytes = [Convert]::FromBase64String($SharedKey)

$sha256 = New-Object -TypeName System.Security.Cryptography.HMACSHA256
$sha256.Key = $keyBytes
$calculatedHash = $sha256.ComputeHash($bytesToHash)
$encodedHash = [Convert]::ToBase64String($calculatedHash)
$authorization = 'SharedKey {0}:{1}' -f $CustomerID, $encodedHash
return $authorization
}

# Function to create and post the request
Function Send-OMSData($CustomerID, $SharedKey, $body, $LogType) 
{
$method = 'POST'
$contentType = 'application/json'
$resource = '/api/logs'
$rfc1123date = [DateTime]::UtcNow.ToString('r')
$contentLength = $body.Length
$signature = New-Signature `
-customerId $CustomerID `
-sharedKey $SharedKey `
-date $rfc1123date `
-contentLength $contentLength `
-method $method `
-contentType $contentType `
-resource $resource
$omsuri = 'https://' + $CustomerID + '.ods.opinsights.azure.com' + $resource + '?api-version=2016-04-01'

$headers = @{
    'Authorization'      = $signature
    'Log-Type'           = $LogType
    'x-ms-date'          = $rfc1123date
    'time-generated-field' = $TimeStampField
}

$response = Invoke-WebRequest -Uri $omsuri -Method $method -ContentType $contentType -Headers $headers -Body $body -UseBasicParsing
return $response.StatusCode
}

# Send to Log Analytics workspace
$json = $LAmessage | ConvertTo-Json
Write-Output -InputObject $json
Send-OMSData -customerId $customerId -sharedKey $sharedKey -body $json -logType $logType

Send-TelstraSMS -tel_numbers $tel_numbers -body $message