How can I call many URLs from a list asynchronously

Question

I have a few hundred thousand URLs that I need to call. These are calls to an application server which will process them and write a status code to a table. I do not need to

Answer 1

You can also use async methods of .net webclients. Say if you just need to send a get request to your Urls, Net.WebClient will work. Below is a dummy example with example.com:

$urllist = 1..97
$batchSize = 20

$results = [System.Collections.ArrayList]::new()

$i = 1
foreach($url in $urllist) {

  $w = [System.Net.Webclient]::new().DownloadStringTaskAsync("http://www.example.com?q=$i")
  $results.Add($w) | Out-Null

  if($i % $batchSize -eq 0 -or $i -eq $urllist.Count) {
      While($false -in $results.IsCompleted) {sleep -Milliseconds 300} # waiting for batch to complete
       Write-Host " ........   Batch completed   ......... $i" -ForegroundColor Green
       foreach($r in $results) { 
         New-Object PSObject -Property @{url = $r.AsyncState.AbsoluteURI; jobstatus =$r.Status; success = !$r.IsFaulted} 
         # if you need response text use $r.Result
       }
     $results.Clear()
   }

$i+=1

}