This code provides a function vncIframe that generates an HTML snippet embedding a VNC viewer iframe, allowing you to easily integrate VNC viewing into your web application. It takes optional connection parameters and dynamically constructs the iframe's source URL with encoded options.

The vncIframe function generates an HTML snippet embedding a VNC viewer iframe, dynamically constructing the iframe's source URL based on provided connection parameters and encoding them for URL safety.

Run example

npm run import -- "connect to VNC through the web browser"

connect to VNC through the web browser

function urlEncode(obj) {
    return Object.keys(obj).map(k => encodeURIComponent(k) + '=' + encodeURIComponent(obj[k])).join('&');
}

var vncIframe = (options = {
    password: 'secret',
    host: 'localhost',
    port: 6080,
    autoconnect: true,
    resize: 'scale',
    view_only: true,
    reconnect: true
}) => {
    console.log(`//localhost:6080/vnc.html?${urlEncode(options)}`);
    return `
<div style="display:block; width:100%; padding-bottom:69%;position:relative;">
<iframe id="vnc"
style="position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:0;" 
src="//localhost:6080/vnc.html?${urlEncode(options)}"></iframe></div>
`;
}
module.exports = vncIframe;

if(typeof $ !== 'undefined') {
    $.mime({'text/html': vncIframe()});
}

// Function to URL encode an object
const urlEncode = (obj) => {
  // Use Object.entries() and map() to create an array of encoded key-value pairs
  return Object.entries(obj).map(([key, value]) => `${encodeURIComponent(key)}=${encodeURIComponent(value)}`).join('&');
}

// Function to generate a VNC iframe
const vncIframe = ({
  password ='secret', // Default password
  host = 'localhost', // Default host
  port = 6080, // Default port
  autoconnect = true, // Default autoconnect
  resize ='scale', // Default resize behavior
  view_only = true, // Default view-only mode
  reconnect = true, // Default reconnect behavior
}) => {
  // Log the URL for debugging purposes
  console.log(`//localhost:6080/vnc.html?${urlEncode({...options })}`);
  
  // Return the iframe HTML
  return `
    

      
    
  `;
}

// Export the vncIframe function
module.exports = vncIframe;

// If $ is defined, render the iframe as HTML
if (typeof $!== 'undefined') {
  $.mime({ 'text/html': vncIframe({ /* Example options */ password: 'example', host: 'example.com' }) });
}

This code defines a function vncIframe that generates an HTML snippet embedding a VNC viewer iframe.

Here's a breakdown:

1. urlEncode Function:

   • Takes an object as input.
   • Encodes the object's keys and values using encodeURIComponent to create URL-safe query parameters.
   • Joins the encoded key-value pairs with & to form a URL query string.

2. vncIframe Function:

   • Accepts an optional options object with VNC connection parameters (host, port, password, etc.).
   • Constructs a URL string for the VNC viewer HTML file (//localhost:6080/vnc.html) with the encoded options appended as query parameters.
   • Returns an HTML string containing an iframe element:
     • The iframe's src attribute points to the constructed VNC viewer URL.
     • The iframe is styled to fill its parent container.

3. Module Export:

   • Exports the vncIframe function as the module's main export.

4. Conditional Execution:

   • Checks if a global variable $ exists (likely a framework or library).
   • If it exists, it calls $.mime to register the vncIframe function as a MIME type handler for HTML content.