[英]Selenium webdriver will not fully load page (python)
我一直在使用pylen的selenium webdriver试图登录到这个网站登录页面
为此,我在python中执行了以下操作:
from selenium import webdriver
import bs4 as bs
driver = webdriver.Chrome()
driver.get('https://app.chatra.io/')
然后我继续尝试使用Beautiful Soup进行解析:
html = driver.execute_script('return document.documentElement.outerHTML')
soup = bs.BeautifulSoup(html, 'html.parser')
print(soup.prettify)
主要问题是页面永远不会完全加载。 当我自己在浏览器中加载页面时,一切都很好。 然而,当selenium webdriver试图加载它时,它似乎只是中途停止。
知道为什么吗? 关于如何解决它或在哪里学习的想法?
首先,这个问题在最新的Chrome中也是可以重现的( chromedriver
2.34 - 目前也是最新的) - 还不确定目前发生了什么。 解决方法: Firefox完美地为我工作 。
而且,我会在driver.get()
和HTML解析之间添加一个额外的步骤 - 显式等待让页面正确加载,直到所需的条件为真:
import bs4 as bs
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
driver = webdriver.Firefox()
driver.get('https://app.chatra.io/')
wait = WebDriverWait(driver, 10)
wait.until(EC.visibility_of_element_located((By.ID, "signin-email")))
html = driver.execute_script('return document.documentElement.outerHTML')
soup = bs.BeautifulSoup(html, 'html.parser')
print(soup.prettify())
请注意,您还需要调用prettify()
- 它是一种方法。
您面临的问题有以下几个方面:
当您尝试使用BeautifulSoup
,如果您尝试使用urllib.request中的urlopen ,则错误说明了一切:
urllib.error.HTTPError: HTTP Error 403: Forbidden
这意味着将检测到urllib.request ,并引发HTTP Error 403: Forbidden
。 因此,使用来自selenium
webdriver
是有道理的。
接下来,当您最初获得ChromeDriver
和Chrome
帮助时, Website
打开并呈现。 但很快ChromeDriver
被一个WebDriver
检测和ChromeDriver
是无法解析<head>
<body>
标记。 您将最小标题视为:
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" class="supports cssfilters flexwrap chrome webkit win hover web"></html>
最后,当您获得GeckoDriver
和Firefox Quantum
的帮助时, Website
将打开并正确呈现,如下所示:
代码块:
from selenium import webdriver from bs4 import BeautifulSoup as soup driver = webdriver.Firefox(executable_path=r'C:\\Utility\\BrowserDrivers\\geckodriver.exe') driver.get('https://app.chatra.io/') html = driver.execute_script('return document.documentElement.outerHTML') pagesoup = soup(html, "html.parser") print(pagesoup)
控制台输出:
<html class="supports cssfilters flexwrap firefox gecko win hover web"><head> <link class="" href="https://app.chatra.io/b281cc6b75916e26b334b5a05913e3eb18fd3a4d.css?meteor_css_resource=true&_g_app_v_=51" rel="stylesheet" type="text/css"/> <meta charset="utf-8"/> <meta content="IE=edge" http-equiv="X-UA-Compatible"/> <meta content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no, viewport-fit=cover" name="viewport"/> . . . <em>··· Chatra</em> . . . </div></body></html>
为汤提取添加美化 :
代码块:
from selenium import webdriver from bs4 import BeautifulSoup as soup driver = webdriver.Firefox(executable_path=r'C:\\Utility\\BrowserDrivers\\geckodriver.exe') driver.get('https://app.chatra.io/') html = driver.execute_script('return document.documentElement.outerHTML') pagesoup = soup(html, "html.parser") print(pagesoup.prettify)
控制台输出:
<bound method Tag.prettify of <html class="supports cssfilters flexwrap firefox gecko win hover web"><head> <link class="" href="https://app.chatra.io/b281cc6b75916e26b334b5a05913e3eb18fd3a4d.css?meteor_css_resource=true&_g_app_v_=51" rel="stylesheet" type="text/css"/> <meta charset="utf-8"/> <meta content="IE=edge" http-equiv="X-UA-Compatible"/> <meta content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no, viewport-fit=cover" name="viewport"/> . . . <em>··· Chatra</em> . . . </div></body></html>>
即使您可以使用Selenium
的page_source方法,如下所示:
代码块:
from selenium import webdriver driver = webdriver.Firefox(executable_path=r'C:\\Utility\\BrowserDrivers\\geckodriver.exe') driver.get('https://app.chatra.io/') print(driver.page_source)
控制台输出:
<html class="supports cssfilters flexwrap firefox gecko win hover web"> <head> <link rel="stylesheet" type="text/css" class="" href="https://app.chatra.io/b281cc6b75916e26b334b5a05913e3eb18fd3a4d.css?meteor_css_resource=true&_g_app_v_=51"> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no, viewport-fit=cover"> <!-- platform specific stuff --> <meta name="msapplication-tap-highlight" content="no"> <meta name="apple-mobile-web-app-capable" content="yes"> <!-- favicon --> <link rel="shortcut icon" href="/static/favicon.ico"> <!-- win8 tile --> <meta name="msapplication-TileImage" content="/static/win-tile.png"> <meta name="msapplication-TileColor" content="#ffffff"> <meta name="application-name" content="Chatra"> <!-- apple touch icon --> <!--<link rel="apple-touch-icon" sizes="256x256" href="/static/?????.png">--> <title>··· Chatra</title> <style> body { background: #f6f5f7 } </style> <style type="text/css"></style> </head> <body> <script async="" src="https://www.google-analytics.com/analytics.js"></script> <script type="text/javascript" src="/meteor_runtime_config.js"></script> <script type="text/javascript" src="https://app.chatra.io/9153feecdc706adbf2c71253473a6aa62c803e45.js?meteor_js_resource=true&_g_app_v_=51"></script> <div class="body body-layout"> <div class="body-layout__main main-layout"> <aside class="main-layout__left-sidebar"> <div class="left-sidebar-layout"> </div> </aside> <div class="main-layout__content"> <div class="content-layout"> <main class="content-layout__main is-no-fades js-popover-boundry js-main"> <div class="center loading loading--light"> <div class="content-padding nothing"> <em>··· Chatra</em> </div> </div> </main> </div> </div> </div> </div> </body> </html>
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