(PowerShell) Prevent JavaScript Infinite Loops

See more JavaScript Examples

Note: This example requires Chilkat v11.4.0 or greater.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

# This is the JavaScript we'll run:

# console.log('Starting infinite loop...'); while(true) {};

$sbScript = New-Object Chilkat.StringBuilder
$sbScript.Append("console.log('Starting infinite loop...'); while(true) {};")

$js = New-Object Chilkat.Js

# Set a limit on the amount of time (in seconds) the script is allowed to run.
# If the JavaScript takes longer than this amount of time, then Chilkat kills the script without crashing the host program.
# The default value of TimeoutSeconds is 0, which indicates no limit.
# For this example, set a limit of 2 seconds.
$js.TimeoutSeconds = 2

$result = New-Object Chilkat.JsonObject
$result.EmitCompact = $false

# Run the script..
$success = $js.Eval($sbScript,$result)
if ($success -eq $false) {
    # Examine the result for an exception.
    $($result.Emit())

    # The result contains this:

    # 	{
    # 	  "exception": {
    # 	    "message": "interrupted - JavaScript exceeded the Chilkat.Js.TimeoutSeconds",
    # 	    "stack": [
    # 	      {
    # 	        "func": "<eval>",
    # 	        "file": "<input>",
    # 	        "line": 1,
    # 	        "col": 8
    # 	      }
    # 	    ]
    # 	  }
    # 	}

    # Also examine the LastErrorText.
    $($js.LastErrorText)
    exit
}

# We should never get here..
$("Succeeded.")
$($result.Emit())

console.log('Starting infinite loop...');
while(true) {};