How to use _on_frame_received method in Playwright Python

I just found the answer:

I need to set also the following and it works: browser.new_context(no_viewport=True)

From what I understand, you have a page that has content within an iframe. You want to use Playwright to access elements within that frame.

The official docs to handle frames: Official docs: https://playwright.dev/docs/frames#frame-objects

You could then try something like this:

// Locate element inside frame
const iframeButton = await page.frameLocator('iFrame').locator("button:has-text(\"Add New User\")");
await iframeButton.click();

Notice that the example has the iFrame tag as locator, but you could and should use something more accurate like and id, name or url.

If you need to handle new page without event listener (i.e. new tab open by link click), you can try this code:

    from playwright import sync_playwright

    with sync_playwright() as p:
        browser = p.chromium.launch()
        context = browser.newContext()
        page = context.newPage()
        page.goto('<site url>')
        with context.expect_page() as tab:
            page.click('.newTabByLink')
        # do some steps
        ...
        tab.close()
        
        browser.close()

as mentioned in https://github.com/microsoft/playwright-python/issues/480

Jupyter notebook uses asyncio event loop, so you should use async api.

from playwright.async_api import async_playwright

playwright = await async_playwright().start()
browser = await playwright.chromium.launch(headless = False)
page = await browser.new_page()

await page.goto("http://whatsmyuseragent.org/")

# await page.screenshot(path="example.png")
# await browser.close()
# await playwright.stop()

If you use sync API, it will throw an Error like this:

from playwright.sync_api import sync_playwright
playwright = sync_playwright().start()

'''
Error: It looks like you are using Playwright Sync API inside the asyncio loop.
Please use the Async API instead.
'''

The only way I found is wrap the goto inside a try-except block

Content of main.py

from playwright.sync_api import Playwright, sync_playwright, expect

with sync_playwright() as p:
    #We define the browser, the context and the page
    browser = p.chromium.launch(headless=False)
    context = browser.new_context()
    page = browser.new_page()
    with page.expect_download() as download_info:
        #If we navigate without try, it will throw an exception and it will stop our script, so, we wrap it inside a try except block
        try:
            page.goto("https://manueltgomes.com/wp-content/uploads/2021/09/ParseHTMLLInks_1_0_0_1.zip")
        except:
            pass
    download = download_info.value
    download.save_as(f"./{download.suggested_filename}")
    context.close()
    browser.close()

Then just run python3 main.py

The file will be saved in the same path of the main.py file

So I found a working solution.

What I did was to combine Javascript with python Playwright code.

I start the setInterval with a timer of 200ms to scroll down on the page with page.evaluate() and then I follow it up with a python loop that checks every second whether the total height of the page (scroll included) has changed. If it changes it continues to scroll and if it hasn't changed than the scroll is over.
This is what it looks like:

page.evaluate(
    """
    var intervalID = setInterval(function () {
        var scrollingElement = (document.scrollingElement || document.body);
        scrollingElement.scrollTop = scrollingElement.scrollHeight;
    }, 200);

    """
)
prev_height = None
while True:
    curr_height = page.evaluate('(window.innerHeight + window.scrollY)')
    if not prev_height:
        prev_height = curr_height
        time.sleep(1)
    elif prev_height == curr_height:
        page.evaluate('clearInterval(intervalID)')
        break
    else:
        prev_height = curr_height
        time.sleep(1)

EDIT

See the below answer using the new mouse.wheel(x, y) feature for an up to date way to scroll using playwright. Combine my answer with his to lessen the need to use JS.

The content function relies on document.documentElement.outerHTML, so you might get a formatted value. If the request returns a JSON you could grab the text from the response that goto returns:

response = page.goto("https://raw.githubusercontent.com/corysimmons/colors.json/master/colors.json")
jsonContent = response.text()
jsonResult = json.loads(jsonContent)
print(jsonResult)

If there is some processing in the middle, you could ask for the inner_text of the :root element:

jsonContent = page.inner_text(':root')
jsonResult = json.loads(jsonContent)
print(jsonResult)

Solved with:

context=firefox.new_context(ignore_https_errors=True)

Functions assigned to events (in any module) can't return value and you may need to use global variable for this. But lambda can't use global and can't assign value to variable so it needs normal function

url = ""

def on_response(response):
    global url  # inform functio to use external variable (instead of local variable) when you use `=` to assign value
    
    if ".m3u8" in response.url:
        url = response.url

page.on("response", on_response)