Python Playwright学习笔记（二）

一、模拟手机
playwright.devices可以配置模拟器。

import asyncio
from playwright.async_api import async_playwright

async def run(playwright):
iphone_12 = playwright.devices['iPhone 12']
browser = await playwright.webkit.launch(headless=False)
context = await browser.new_context(
**iphone_12,
)

async def main():
async with async_playwright() as playwright:
await run(playwright)
asyncio.run(main())

二、监听响应

page.on可以监听事件，包含浏览器关闭、请求、响应等。

from playwright.sync_api import sync_playwright

def on_response(response):
if '/api/xx/' in response.url and response.status == 200:
print(response.json())

with sync_playwright() as p:
browser = p.chromium.launch(headless=False)
page = browser.new_page()
page.on('response', on_response)
page.goto('https://xx.com/')
page.wait_for_load_state('networkidle')
browser.close()

三、读写Cookies

from playwright.sync_api import Playwright, sync_playwright
import json

def run(playwright: Playwright) -> None:
browser = playwright.chromium.launch(headless=False)

加载cookie

with open("cookie.json") as f:
storage_state = json.loads(f.read())
context = browser.new_context(storage_state=storage_state)

Open new page

page = context.new_page()

Go to http://www.glidedsky.com/login

page.goto("http://www.xx.com/login")

Click input[name="email"]

page.click("input[name="email"]")

Fill input[name="email"]

page.fill("input[name="email"]", "账号")

Click input[name="password"]

page.click("input[name="password"]")

Fill input[name="password"]

page.fill("input[name="password"]", "密码")

Click button:has-text("Login")

page.click("button:has-text("Login")")
# assert page.url == "http://www.glidedsky.com/"

获得登录后 cookie

storage = context.storage_state()
with open("cookie.json", "w") as f:
f.write(json.dumps(storage))

page.close()

context.close()
browser.close()

with sync_playwright() as playwright:
run(playwright)

四、获取网页的HTML

在 Playwright 中，可以使用 page.content() 方法获取当前页面的 HTML 内容。以下是一个简单的例子，展示如何使用 Playwright 获取一个网页的 HTML：

import asyncio
from playwright.async_api import async_playwright

async def main():
async with async_playwright() as p:
browser = await p.chromium.launch()
page = await browser.new_page()
await page.goto('https://example.com')
html = await page.content()
print(html)

asyncio.run(main())
在上面的例子中，我们首先创建一个 Playwright 实例，然后启动一个 Chromium 浏览器。接下来，我们创建一个新的页面，并导航到 https://example.com 。最后，我们使用 page.content() 方法获取当前页面的 HTML 内容，并将其打印出来。

请注意，page.content() 方法返回的是一个字符串，其中包含了整个 HTML 文档的内容。如果你需要获取某个特定元素的 HTML 代码，可以使用 page.evaluate() 方法执行 JavaScript 代码，然后使用 Playwright 的 DOM API 来获取元素的 HTML。例如，以下代码演示了如何获取一个页面的标题元素：

import asyncio
from playwright.async_api import async_playwright

async def main():
async with async_playwright() as p:
browser = await p.chromium.launch()
page = await browser.new_page()
await page.goto('https://example.com')
title_element = await page.query_selector('h1')
title_html = await p.evaluate(title_element, fn)
print(title_html)

asyncio.run(main())