我目前正在尝试实现一个抓取工具,每天两次检查某些 PDF 是否更改名称。不幸的是,它需要网站操作才能找到 pdf,因此我认为最好的解决方案是 Selenium 和 AWS Lambda 的组合。
首先,我关注 this教程。我已经完成了本教程,但遇到了来自 Lambda 的错误:
START RequestId: 18637c6d-ea75-40ee-8789-374654700b99 Version: $LATEST
Starting google.com
Message: 'chromedriver' executable needs to be in PATH. Please see https://sites.google.com/a/chromium.org/chromedriver/home
: WebDriverException
Traceback (most recent call last):
File "/var/task/lambda_function.py", line 46, in lambda_handler
driver = webdriver.Chrome(chrome_options=chrome_options)
File "/var/task/selenium/webdriver/chrome/webdriver.py", line 68, in __init__
self.service.start()
File "/var/task/selenium/webdriver/common/service.py", line 83, in start
os.path.basename(self.path), self.start_error_message)
selenium.common.exceptions.WebDriverException: Message: 'chromedriver' executable needs to be in PATH. Please see https://sites.google.com/a/chromium.org/chromedriver/home
其他人也遇到过此错误,作者通过链接到this“解决”了该错误。堆栈溢出页。我已经尝试过查看它,但所有答案都与在桌面上使用 headless Chrome 有关,而不是与AWS lambda有关。
我尝试过一些更改,但没有成功。
1) 将 chromedriver 和 headless-chromium 更改为 .exe 文件
2) 更改这行代码以包含executable_path
driver = webdriver.Chrome(chrome_options=chrome_options, executable_path=os.getcwd() + "/bin/chromedriver.exe")
任何使 selenium 和 aws lambda 协同工作的帮助将不胜感激。
最佳答案
我遇到了同样的问题,这是由于二进制文件位于无法执行它们的位置。添加一个函数来移动它们,然后从该位置读取它们来修复它。请参阅下面的示例,我在研究此错误时刚刚开始工作。 (对于困惑的代码表示歉意。)
import time
import os
from selenium import webdriver
from fake_useragent import UserAgent
import subprocess
import shutil
import time
BIN_DIR = "/tmp/bin"
CURR_BIN_DIR = os.getcwd() + "/bin"
def _init_bin(executable_name):
start = time.clock()
if not os.path.exists(BIN_DIR):
print("Creating bin folder")
os.makedirs(BIN_DIR)
print("Copying binaries for " + executable_name + " in /tmp/bin")
currfile = os.path.join(CURR_BIN_DIR, executable_name)
newfile = os.path.join(BIN_DIR, executable_name)
shutil.copy2(currfile, newfile)
print("Giving new binaries permissions for lambda")
os.chmod(newfile, 0o775)
elapsed = time.clock() - start
print(executable_name + " ready in " + str(elapsed) + "s.")
def handler(event, context):
_init_bin("headless-chromium")
_init_bin("chromedriver")
chrome_options = webdriver.ChromeOptions()
chrome_options.add_argument('--headless')
chrome_options.add_argument('--disable-gpu')
chrome_options.add_argument('--window-size=1280x1696')
chrome_options.add_argument('--no-sandbox')
chrome_options.add_argument('--hide-scrollbars')
chrome_options.add_argument('--enable-logging')
chrome_options.add_argument('--log-level=0')
chrome_options.add_argument('--v=99')
chrome_options.add_argument('--single-process')
chrome_options.add_argument('--ignore-certificate-errors')
chrome_options.binary_location = "/tmp/bin/headless-chromium"
driver = webdriver.Chrome("/tmp/bin/chromedriver", chrome_options=chrome_options)
driver.get('https://en.wikipedia.org/wiki/Special:Random')
line = driver.find_element_by_class_name('firstHeading').text
print(line)
driver.quit()
return line
关于python - 在 AWS Lambda 上运行 Selenium 时出现问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56082021/