Get html file value from powershell-CodePudding

We have a html file that is used to test whether a internal tool is properly installed or not.

The html file outputs two values Connected or Connection failed.

Below is the screenshot, when we opened the html file through browser.

I need above values to be output via PowerShell terminal.

I tried Invoke-Webrequest but couldnt get the required values.

Invoke-WebRequest C:\websocket.html | Select content

Content

{60, 33, 68, 79...}

Invoke-WebRequest C:\websocket.html | Select-Object -ExpandProperty rawcontent
Content-Length: 886
Content-Type: application/octet-stream

<!DOCTYPE html>
<html>
   <meta charset = "utf-8" />
   <title>WebSocket Test</title>

   <script language = "javascript" type = "text/javascript">
      var wsUri = "ws://localhost:9091/";
      var output;
    
      function init() {
         output = document.getElementById("output");
         testWebSocket();
      }
    
      function testWebSocket() {
         websocket = new WebSocket(wsUri);
            
         websocket.onopen = function(evt) {
            onOpen(evt)
         };

     websocket.onclose = function(evt){
        onClose(evt)
     };
      }

    function onClose(evt) {
        document.getElementById('output').innerHTML  = 'CONNECTION FAILED';
    }
    
      function onOpen(evt) {
    document.getElementById('output').innerHTML  = 'CONNECTED';

      }
    
      window.addEventListener("load", init, false);
   
   </script>

   <h2>WebSocket Test</h2>
   <div id = "output"></div>

</html>

Any help?

Edited: (Invoke-WebRequest C:\websocket.html).Content 60, 33, 68, 79, 67, 84, 89, 80, 69, 32, 104, 116, 109, 108, 62, 10, 60, 104, 116, 109, 108, 62, 10, 32, 32, 32, 60, 109, 101, 116, 97, 32, 99, 104, 97, 114, 115, 101, 116, 32, 61, 32, 34, 117, 116, 102, 45, 56, 34, 32, 47, 62, 10, 32, 32, 32, 60, 116, 105, 116, 108, 101, 62, 87, 101, 98, 83, 111, 99, 107, 101, 116, 32, 84, 101, 115, 116, 60, 47, 116, 105, 116, 108, 101, 62, 10, 10, 32, 32, 32, 60, 115, 99, 114, 105, 112, 116, 32, 108, 97, 110, 103, 117, 97, 103, 101, 32, 61, 32, 34, 106, 97, 118, 97, 115, 99, 114, 105, 112, 116, 34, 32, 116, 121, 112, 101, 32, 61, 32, 34, 116, 101, 120, 116, 47, 106, 97, 118, 97, 115, 99, 114, 105, 112, 116, 34, 62, 10, 32, 32, 32, 32, 32, 32, 118, 97, 114, 32, 119, 115, 85, 114, 105, 32, 61, 32, 34, 119, 115, 58, 47, 47, 108, 111, 99, 97, 108, 104, 111, 115, 116, 58, 57, 48, 57, 49, 47, 34, 59, 10, 32, 32, 32, 32, 32, 32, 118, 97, 114, 32, 111, 117, 116, 112, 117, 116, 59, 10, 9, 10, 32, 32, 32, 32, 32, 32, 102, 117, 110, 99, 116, 105, 111, 110, 32, 105, 110, 105, 116, 40, 41, 32, 123, 10, 32, 32, 32, 32, 32, 32, 32, 32, 32, 111, 117, 116, 112, 117, 116, 32, 61, 32, 100, 111, 99, 117, 109, 101, 110, 116, 46, 103, 101, 116, 69, 108, 101, 109, 101, 110, 116, 66, 121, 73, 100, 40, 34, 111, 117, 116, 112, 117, 116, 34, 41, 59, 10, 32, 32, 32, 32, 32, 32, 32, 32, 32, 116, 101, 115, 116, 101, 98, 83, 111, 99, 107, 101, 116, 40, 41, 59, 10, 32, 32, 32, 32, 32, 32, 125, 10, 9, 10, 32, 32, 32, 32, 32, 32, 102, 117, 110, 99, 116, 105, 111, 110, 32, 116, 101, 115, 116, 87, 101, 98, 83, 111, 99, 107, 101, 116, 40, 41, 32, 123, 10, 32, 32, 32, 32, 32, 32, 32, 32, 32, 119, 101, 98, 115, 111, 99, 107, 101, 116, 32, 61, 32, 110, 101, 119, 32, 87, 101, 98, 83, 111, 99, 107, 101, 116, 40, 119, 115, 85, 114, 105, 41, 59, 10, 9, 9, 10, 32, 32, 32, 32, 32, 32, 32, 32, 32, 119, 101, 98, 115, 111, 99, 107, 101, 116, 46, 111, 110, 111, 112, 101, 110, 32, 61, 32, 102, 117, 110, 99, 116, 105, 111, 110, 40, 101, 118, 116, 41, 32, 123, 10, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 111, 110, 79, 112, 101, 110, 40, 101, 118, 116, 41, 10, 32, 32, 32, 32, 32, 32, 32, 32, 32, 125, 59, 10, 10, 9, 32, 119, 101, 98, 115, 111, 99, 107, 101, 116, 46, 111, 110, 99, 108, 111, 115, 101, 32, 61, 32, 102, 117, 110, 99, 116, 105, 111, 110, 40, 101, 118, 116, 41, 123, 10, 9, 9, 111, 110, 67, 108, 111, 115, 101, 40, 101, 118, 116, 41, 10, 9, 32, 125, 59, 10, 32, 32, 32, 32, 32, 32, 125, 10, 10, 9, 102, 117, 110, 99, 116, 105, 111, 110, 32, 111, 110, 67, 108, 111, 115, 101, 40, 101, 118, 116, 41, 32, 123, 10, 9, 9, 100, 111, 99, 117, 109, 101, 110, 116, 46, 103, 101, 116, 69, 108, 101, 109, 101, 110, 116, 66, 121, 73, 100, 40, 39, 111, 117, 116, 112, 117, 116, 39, 41, 46, 105, 110, 110, 101, 114, 72, 84, 77, 76, 32, 43, 61, 32, 39, 67, 79, 78, 78, 69, 67, 84, 73, 79, 78, 32, 70, 65, 73, 76, 69, 68, 39, 59, 10, 9, 125, 10, 9, 10, 32, 32, 32, 32, 32, 32, 102, 117, 110, 99, 116, 105, 111, 110, 32, 111, 110, 79, 112, 101, 110, 40, 101, 118, 116, 41, 32, 123, 10, 9, 100, 111, 99, 117, 109, 101, 110, 116, 46, 103, 101, 116, 69, 108, 101, 109, 101, 110, 116, 66, 121, 73, 100, 40, 39, 111, 117, 116, 112, 117, 116, 39, 41, 46, 105, 110, 110, 101, 114, 72, 84, 77, 76, 32, 43, 61, 32, 39, 67, 79, 78, 78, 69, 67, 84, 69, 68, 39, 59, 10, 10, 32, 32, 32, 32, 32, 32, 125, 10, 9, 10, 32, 32, 32, 32, 32, 32, 119, 105, 110, 100, 111, 119, 46, 97, 100, 100, 69, 118, 101, 110, 116, 76, 105, 115, 116, 101, 110, 101, 114, 40, 34, 108, 111, 97, 100, 34, 44, 32, 105, 110, 105, 116, 44, 32, 102, 97, 108, 115, 101, 41, 59, 10, 32, 32, 32, 10, 32, 32, 32, 60, 47, 115, 99, 114, 105, 112, 116, 62, 10, 10, 32, 32, 32, 60, 104, 50, 62, 87, 101, 98, 83, 111, 99, 107, 101, 116, 32, 84, 101, 115, 116, 60, 47, 104, 50, 62, 10, 32, 32, 32, 60, 100, 105, 118, 32, 105, 100, 32, 61, 32, 34, 111, 117, 116, 112, 117, 116, 34, 62, 60, 47, 100, 105, 118, 62, 10, 10, 60, 47, 104, 116, 109, 108, 62, 10

CodePudding user response：

Invoke-WebRequest does not actually handle local html files. Even though it looks like it is successful, it just... opens the file. This is made more clear in newer versions of powershell (v7.1 below):

Invoke-WebRequest C:\websocket.html

[Error] Invoke-WebRequest: Only 'http' and 'https' schemes are allowed. (Parameter 'requestUri')

Another option is to use the internet explorer COM objects to basically open the file in IE, and scrape the page:

$url = 'C:\websocket.html'
$ie = New-Object -com internetexplorer.application  -Property @{visible = $false}
$ie.navigate($url)

# Optionally wait for connection
while ($ie.Busy -eq $true){sleep 1}
$output = $ie.Document.documentElement.innerText
# Output the last line of the returned page
$output -split [environment]::NewLine | Select -Last 1
$ie.Quit()

# Outputs:
CONNECTION FAILED

If it doesn't look like the output is working, set visible = $true, and see if IE is complaining about something (for me, I had to allow ActiveX).

CodePudding user response：

$value= Invoke-RestMethod -Uri "C:\websocket.html" 
$op = [char[]]$value.Content
$op -join ''