问题描述
我目前正在尝试实施一个刮板，该刮板将每天检查两次，以了解某些PDF是否更改了名称.不幸的是，它需要网站操纵才能找到pdf，因此我认为最好的解决方案是Selenium和AWS Lambda的组合.
I am currently trying to implement a scraper that will check twice a day for if certain PDFs change names. Unfortunately it requires website manipulation to find the pdfs so the best solution in my mind is a combination of Selenium and AWS Lambda.
首先，我遵循本教程.我已经完成了本教程，但在Lambda中遇到了此错误:
To begin I was following this tutorial. I have completed the tutorial but ran into this error from Lambda:
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
此错误是其他人遇到的，并且作者链接到堆栈溢出页面.我已经尝试过了，但是所有答案都与在台式机上使用无头铬而不是在AWS Lambda上有关.
This error was experienced by others and was "resolved" by the author by linking to this stack overflow page. I have tried going through it but all the answers are pertaining to using headless chromium on desktop not AWS lambda.
我尝试了几次更改都没有用.
A couple of changes Ive tried to no avail.
1)将chromedriver和headless-chromium更改为.exe文件
2)更改此代码行以包含可执行文件路径
1) Changing the chromedriver and headless-chromium to .exe files
2) Changing this line of code to include the executable_path
driver = webdriver.Chrome(chrome_options=chrome_options, executable_path=os.getcwd() + "/bin/chromedriver.exe")
在帮助硒和aws lambda协同工作方面的任何帮助将不胜感激.
Any help in getting selenium and aws lambda working together would be greatly appreciated.
推荐答案
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.添加了移动它们的功能，然后从该位置读取它们，从而对其进行了修复.请参阅下面的示例，该示例是我在研究此错误时刚开始工作的.(为乱码表示歉意.)
I had the same issue and it was due to the binary files being in a location that couldn't execute them. Adding a function to move them, then reading them from that location fixed it. See below example which I just got working while researching this error. (Apologies for the messy code.)
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
这篇关于在AWS Lambda上运行Selenium的问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！