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События (Events)

События в page.goto

В переменной wait_until.

  • load: загрузка всего контента
  • domcontentloaded: загрузка dom
  • commit: при получении ответа от сервера 
  • networkidle: до завершения всех событий сети. Для динамического контента не меньше чем load.

Можно считать время загрузки. 

from playwright.sync_api import sync_playwright
from time import perf_counter

with sync_playwright() as playwright:
    browser = playwright.chromium.launch(headless=False, slow_mo=500)
    page = browser.new_page()
    print('Page loading...')
    start = perf_counter()
    page.goto("https://playwright.dev/python", wait_until='load')
    delta = perf_counter() - start
    print(f'Page loaded in {delta} s.')
    
    browser.close()

События динамического контента (React, ...)

Находим динамический элемент, кликаем по нему и при помощи wait_for() ждем.

from playwright.sync_api import sync_playwright
from time import perf_counter

with sync_playwright() as playwright:
    browser = playwright.chromium.launch(headless=False, slow_mo=500)
    page = browser.new_page()
    page.goto("https://www.scrapethissite.com/pages/ajax-javascript/", timeout=60_000)
    mylink = page.get_by_role("link", name="2014")
    mylink.click()
    print('Loading movie...')
    start = perf_counter()
    loadedcont = page.locator("td.film-title").first
    loadedcont.wait_for()
    delta = perf_counter() - start
    print(f'Movie loaded in {delta} s.')
    
    browser.close()

Ожидание события.

Указываем тип события и функцию, выполняемую при наступлении события. 

from playwright.sync_api import sync_playwright

def onload(page):
    print("Page loaded", page)

with sync_playwright() as playwright:
    browser = playwright.chromium.launch(headless=False, slow_mo=500)
    page = browser.new_page()
    page.on("load", onload)
    page.goto("https://bootswatch.com/default")
    browser.close()

Пример просмотра событий запросов 

from playwright.sync_api import sync_playwright

def onrequest(request):
    print("Request send: ", request)

with sync_playwright() as playwright:
    browser = playwright.chromium.launch(headless=False, slow_mo=500)
    page = browser.new_page()
    page.on("request", onrequest)
    page.goto("https://bootswatch.com/default")
    browser.close()

Вывод: 

Request send:  <Request url='https://bootswatch.com/default' method='GET'>
Request send:  <Request url='http://bootswatch.com/default/' method='GET'>
Request send:  <Request url='https://bootswatch.com/default/' method='GET'>
Request send:  <Request url='https://bootswatch.com/_vendor/bootstrap/dist/css/bootstrap.css' method='GET'>
Request send:  <Request url='https://bootswatch.com/_vendor/bootstrap-icons/font/bootstrap-icons.min.css' method='GET'>
Request send:  <Request url='https://bootswatch.com/_vendor/prismjs/themes/prism-okaidia.css' method='GET'>
Request send:  <Request url='https://bootswatch.com/_assets/css/custom.min.css' method='GET'>
Request send:  <Request url='https://www.googletagmanager.com/gtag/js?id=G-KGDJBEFF3W' method='GET'>
Request send:  <Request url='https://cdn.carbonads.com/carbon.js?serve=CKYIE23N&placement=bootswatchcom' method='GET'>
Request send:  <Request url='https://bootswatch.com/_vendor/bootstrap/dist/js/bootstrap.bundle.min.js' method='GET'>
Request send:  <Request url='https://bootswatch.com/_vendor/prismjs/prism.js' method='GET'>
Request send:  <Request url='https://bootswatch.com/_assets/js/custom.js' method='GET'>
Request send:  <Request url='https://bootswatch.com/_vendor/bootstrap-icons/font/fonts/bootstrap-icons.woff2?1fa40e8900654d2863d011707b9fb6f2' method='GET'>
Request send:  <Request url='https://www.google-analytics.com/g/collect?v=2&tid=G-KGDJBEFF3W&gtm=45je54g0v9135688085za200&_p=1744912703288&gcd=13l3l3l3l1l1&npa=0&dma=0&tag_exp=102509682~102803279~102813109~102887800~102926062~103027016~103051953~103055465~103077950~103106314~103106316~103130495~103130497&cid=128797986.1744912704&ul=ru-ru&sr=1280x720&uaa=x86&uab=64&uafvl=Not%253AA-Brand%3B24.0.0.0%7CChromium%3B134.0.6998.35&uamb=0&uam=&uap=Windows&uapv=10.0.0&uaw=0&are=1&frm=0&pscdl=noapi&_s=1&sid=1744912703&sct=1&seg=0&dl=https%3A%2F%2Fbootswatch.com%2Fdefault%2F&dt=Bootswatch%3A%20Default&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=2018' method='POST'>
Request send:  <Request url='https://srv.carbonads.net/ads/CKYIE23N.json?segment=placement:bootswatchcom&v=true' method='GET'>

Есть событие при выборе файла.

Удаление прослушивания события: page.remove_listener("name_event", func)

События всплывающих окон (alert, confirm, prompt)

Событие page.on("dialog", func), устанавливаем ожидание до возможного появления окна.

Функция: 

def on_dialog(dialog)
    dialog.accept()
    dialog.dismiss()

Если диалог prompt, то для заполнения поля ввода в функции accept нужно добавить строковую переменную. 

def on_dialog(dialog)
    dialog.accept("Text for enter")

Событие скачивания файла

from playwright.sync_api import sync_playwright

with sync_playwright() as playwright:
    browser = playwright.chromium.launch(headless=False, slow_mo=500)
    page = browser.new_page()
    page.goto("https://bootswatch.com/default")
    btn = page.get_by_role("link", name="Download me")
    with page.expect_download() as download_info:
        btn.click()
    download = download_info.value
    download.save_as(fname)
    browser.close()

Второй вариант: добавить listener 

from playwright.sync_api import sync_playwright

def saving_func(download):
    fname = "first.jpg"
    download.save_as(fname)

with sync_playwright() as playwright:
    browser = playwright.chromium.launch(headless=False, slow_mo=500)
    page = browser.new_page()
    page.goto("https://bootswatch.com/default")
    page.once("download", saving_func)
    btn = page.get_by_role("link", name="Download me")
    with page.expect_download() as download_info:
        btn.click()
    browser.close()

 

 

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