How to use Invoke method of PuppeteerSharp.TestServer.SimpleCompressionMiddleware class

You are on the wrong direction. The referenced site has playlist api which returns json. you can get information from :

http://iloveradio.de/typo3conf/ext/ep_channel/Scripts/playlist.php

Edit: Chome Inspector is used to find out Playlist link

When I used querySelectorAll. My issue has been resolved.

var  content = await page.EvaluateExpressionAsync("document.querySelectorAll('#res')");

This may be due to CORS.

Try the following code.

var options = new LaunchOptions
{
    Devtools = true,
    Args = new[]
    {
        "--disable-web-security",
        "--disable-features=IsolateOrigins,site-per-process",
    },
};

I found a solution: If the pages will be created in the same scope as their browser instance, then the pages will be created as expected, otherwise Task.Run() will be stuck due to NewPageAsync() method.

Bad behaviour:

Task[] Tasks = new Task[1];
Browser browser = await Puppeteer.LaunchAsync
(
    new LaunchOptions
    {
        Headless = true,
        ExecutablePath = "Chromium\\chrome.exe"
    }
);
for (int i = 0; i < Tasks.Length; i++)
{
    int ThreadNumber = i;
    Tasks[i] = Task.Run(async () =>
    {
       Page page = await browser.NewPageAsync(); //stucks
    });
}

Task.WaitAll(Tasks);

As expected:

Task[] Tasks = new Task[1];
for (int i = 0; i < Tasks.Length; i++)
{
    int ThreadNumber = i;
    Tasks[i] = Task.Run(async () =>
    {
       Browser browser = await Puppeteer.LaunchAsync
       (
           new LaunchOptions
           {
                Headless = true,
               ExecutablePath = "Chromium\\chrome.exe"
           }
       );
       Page page = await browser.NewPageAsync(); //creates as expected
    });
}

Task.WaitAll(Tasks);

Anyway this is not the best solution because I have to create browsers for async tasks rather than using one browser for all async tasks. Hope someone can explain that. Thanks everyone for helping!

That's an array in the browser. If you want to get that array on your site, you can use the GetPropertiesAsync method. It should be something like this:

var properties = await elements.GetPropertiesAsync().ConfigureAwait(false);
var elementsArray = properties.Values.OfType<ElementHandle>().ToArray();

Either give your submit button an id property and use the #submit selector you previously tried:

<button id="submit" type="submit" class="btn btn-danger btn-lg btn-block">Login</button>

Or use form button[type=submit] as selector.

It's rather messy but this seems to work..

using (Browser browser = await Puppeteer.LaunchAsync(options))
{
     // create the async context 
    var context = await browser.CreateIncognitoBrowserContextAsync();

    // get the page created by default when launch async ran and close it whilst keeping the browser active
    var browserPages = await browser.PagesAsync();
    await browserPages[0].CloseAsync();

    // create a new page using the incognito context
    using (Page page = await context.NewPageAsync())
    {
        // do something 
    }
}

You should use EvaluateExpressionAsync.

_page.EvaluateExpressionAsync("JSON.stringify(performance.timeOrigin)").ConfigureAwait(false);

Not sure you can disable the built in download manager with --disable-extensions.

Another approach if it is just ZIP's you want to stop is to plumb this code in:-

await page.setRequestInterception(true);
page.on('request', request => {
    if (request.url().endsWith('.zip'))
        request.abort();
    else
      request.continue();
});

You may also want to lower case the url so you also trap .ZIP abnd Zip etc

Also on your goto you will need to abort the request e.g.

  await page
        .goto("https://winaero.com/downloads/Win7Games4Win10_8_81_v2.zip")
        .catch(r => r.abort);