Web request question

Question

I am setting up a custom script to do a remote web call (HTTP post) using Invoke-Webrequest.

I have it working, but how can I have Adaxes send an email or retry if the remote HTTP server is down or unreachable during the attempted call?

This is the error that would be output from a failed attempt in this case.

Unable to connect to the remote server. For example:

Invoke-WebRequest -URI someunreachable.com

The site has to have a valid DNS name obviously, but let's assume the site does but it is just unreachable for some reason (network, web services down, etc)

Answer 1

Hello,

To send e-mail messages from scripts executed in Adaxes, you can use the SendMail method of the predefined $Context variable. To retry a web request for a certain number of attempts or until it is successful, you can use the following script. In the script:

$waitTimeInterval – specifies how many seconds will the script wait before the next attempt.

$retryCount – specifies the maximum number of attempts.

$waitTimeInterval = 5 # TODO: modify me
$retryCount = 10 # TODO: modify me

do
{
    try
    { 
        $response = Invoke-WebRequest -Uri "http://host.domain.com"
    }
    catch
    {
        $retryCount--
        Start-Sleep -Seconds $waitTimeInterval
    }
}
while ($response.StatusCode -ne 200 -and $retryCount -gt 0)

Please note, that by default, the timeout for PowerShell script execution in Adaxes is 10 minutes. For detailed information, please see https://www.adaxes.com/help/?ManageBusinessRules.IncreaseScriptTimeout.html.