Write custom logs via PowerShell

~~using namespace System.Net~~

~~# Input bindings are passed in via param block.~~

~~param(~~

$Request, $TriggerMetadata)




# Interact with query parameters or the body of the request.

$LogContentcustomerId = ""
$Request.Body.LogContent
sharedKey = ""
$LogType = $Request.Body.LogType
""



Function Build-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 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 Post-LogAnalyticsData ($customerId, $sharedKey, $body, $logType){

 
    $method = "POST"

 
    $contentType = "application/json"

 
    $resource = "/api/logs"

 
    $rfc1123date = ([DateTime]::UtcNow).ToString("r")

 
    $contentLength = $body.Length

 
    $signature = Build-Signature -customerId $customerId -sharedKey $sharedKey -date $rfc1123date -contentLength $contentLength -method $method -contentType $contentType -resource $resource

   

 
   
    $uri = "https://" + $customerId + ".ods.opinsights.azure.com" + $resource + "?api-version=2016-04-01"

 

 
 
    $headers = @{

 
        "Authorization" = $signature;

 
        "Log-Type" = $logType;

 
        "x-ms-date" = $rfc1123date;

 
    }

 

 
 
    $response = Invoke-WebRequest -Uri $uri -Method $method -ContentType $contentType -Headers $headers -Body $body -UseBasicParsing

 
    return $response.StatusCode
}



$customerId = ""

$sharedKey = ""

$LogType = ""



$Properties = [Ordered] @{

 
    "ComputerName"     = $env:computername

 
    "User"             = $env:Username
}



$CustomLogs = New-Object -TypeName "PSObject" -Property $Properties | ConvertTo-JSON -Depth 10





#Submit the data to the API endpoint
$params = @{

 
    CustomerId = $customerId

 
    SharedKey  = $sharedKey

 
    Body       = ([System.Text.Encoding]::UTF8.GetBytes($CustomLogs))

 
    LogType    = $LogType
}
$LogResponse = Post-LogAnalyticsData @params
$LogResponse