尝试通过 crontab 运行 一个 python 脚本，但出现与 Remote webdriver init 相关的错误
Trying to run a python script through crontab but getting errors related to Remote webdriver init
这是一个 python 脚本。 运行 在 Python 3.8。浏览器 - Firefox 和 geckodriver（最新版本）
#!/usr/bin/python3
from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
from selenium.webdriver.firefox.firefox_binary import FirefoxBinary (#added later to solve)
if __name__ == '__main__': (#added later to solve error)
binary = FirefoxBinary('/usr/bin/firefox') (#added later to solve error)
z=''
with open('dailynews.txt','w+') as fileobj:
dailynews=['State Bank of India']
for z in dailynews:
wbpg='https://news.google.com/search?q=' + str(z) + ' when:1d'
driver=webdriver.Firefox() (#This was earlier and worked fine.)
driver=webdriver.Firefox(firefox_binary=binary,executable_path='/usr/bin/geckodriver')
(#added later to solve)
driver.get(wbpg)
articlelist=WebDriverWait(driver,20).until(EC.presence_of_all_elements_located
((By.XPATH,"//*@class='DY5T1d RZIKme']")))
articlelist=driver.find_elements_by_xpath("//*[@class='DY5T1d RZIKme']")
for i in articlelist:
print(i.text,file=fileobj) #,file=fileobj >> to write to a file
driver.quit()
'''
此脚本在 python ide (eclipse>PyDev) 中运行良好，并且在终端中运行良好。
但是，我在 crontab 中安排了相同的时间（使用 crontab -e）。
* * * * * /usr/bin/python3 /Documents/morning_newspaper.py >> ~/Documents/cron.log 2>&1)
作业是 运行 但我收到以下错误：
Traceback (most recent call last): File
"/home/leopard/Documents/morning_newspaper.py", line 22, in
driver=webdriver.Firefox(firefox_binary=binary,executable_path='/usr/bin/geckodriver')
File
"/home/leopard/.local/lib/python3.8/site-packages/selenium/webdriver/firefox
webdriver.py", line 170, in init RemoteWebDriver.init( File
"/home/leopard/.local/lib/python3.8/site-packages/selenium/webdriver/remote/webdriver.py",
line 157, in init self.start_session(capabilities,
browser_profile) File
"/home/leopard/.local/lib/python3.8/site-packages/selenium/webdriver/remote/webdriver.py",
line 252, in start_session response =
self.execute(Command.NEW_SESSION, parameters) File
"/home/leopard/.local/lib/python3.8/site-packages/selenium/webdriver/remote/webdriver.py",
line 321, in execute self.error_handler.check_response(response) File
"/home/leopard/.local/lib/python3.8/site-packages/selenium/webdriver/remote/errorhandler.py",
line 242, in check_response raise exception_class(message, screen,
stacktrace) selenium.common.exceptions.WebDriverException: Message:
Process unexpectedly closed with status 1
这是来自作业的系统日志片段：
Feb 8 12:23:01 leopard CRON[7344]: (leopard) CMD (/usr/bin/python3
/Documents/morning_newspaper.py >> ~/Documents/cron.log 2>&1) Feb 8
12:23:01 leopard dbus-daemon[1552]: [session uid=1000 pid=1552]
Activating via systemd: service name='org.freedesktop.Tracker1'
unit='tracker-store.service' requested by ':1.1' (uid=1000 pid=1548
comm="/usr/libexec/tracker-miner-fs " label="unconfined") Feb 8
12:23:01 leopard systemd[1540]: Starting Tracker metadata database
store and lookup manager... Feb 8 12:23:01 leopard dbus-daemon[1552]:
[session uid=1000 pid=1552] Successfully activated service
'org.freedesktop.Tracker1' Feb 8 12:23:01 leopard systemd[1540]:
Started Tracker metadata database store and lookup manager. Feb 8
12:23:01 leopard dbus-daemon[1552]: [session uid=1000 pid=1552]
Activating via systemd: service
name='org.freedesktop.Tracker1.Miner.Extract'
unit='tracker-extract.service' requested by ':1.1' (uid=1000 pid=1548
comm="/usr/libexec/tracker-miner-fs " label="unconfined") Feb 8
12:23:01 leopard systemd[1540]: Starting Tracker metadata extractor...
Feb 8 12:23:01 leopard tracker-extract[7356]: Set scheduler policy to
SCHED_IDLE Feb 8 12:23:01 leopard tracker-extract[7356]: Setting
priority nice level to 19 Feb 8 12:23:01 leopard dbus-daemon[1552]:
[session uid=1000 pid=1552] Successfully activated service
'org.freedesktop.Tracker1.Miner.Extract' Feb 8 12:23:01 leopard
systemd[1540]: Started Tracker metadata extractor. Feb 8 12:23:12
leopard systemd[1540]: tracker-extract.service: Succeeded. Feb 8
12:23:31 leopard tracker-store[7349]: OK Feb 8 12:23:31 leopard
systemd[1540]: tracker-store.service: Succeeded.
最初，认为这是由于驱动程序启动造成的，因此添加了 Firefox 二进制文件和所有内容（来自 Whosebug 上的 post），但这不起作用。
感谢您提供预期的解决方案。
'''
cron 用于执行任务的 user/environment 可能没有 permission/ability 来启动 UI 进程。
要解决此问题，您可以使用无头模式：
...
binary = FirefoxBinary('/usr/bin/firefox')
binary.add_command_line_options('-headless')
...
这是一个 python 脚本。 运行 在 Python 3.8。浏览器 - Firefox 和 geckodriver（最新版本）
#!/usr/bin/python3
from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
from selenium.webdriver.firefox.firefox_binary import FirefoxBinary (#added later to solve)
if __name__ == '__main__': (#added later to solve error)
binary = FirefoxBinary('/usr/bin/firefox') (#added later to solve error)
z=''
with open('dailynews.txt','w+') as fileobj:
dailynews=['State Bank of India']
for z in dailynews:
wbpg='https://news.google.com/search?q=' + str(z) + ' when:1d'
driver=webdriver.Firefox() (#This was earlier and worked fine.)
driver=webdriver.Firefox(firefox_binary=binary,executable_path='/usr/bin/geckodriver')
(#added later to solve)
driver.get(wbpg)
articlelist=WebDriverWait(driver,20).until(EC.presence_of_all_elements_located
((By.XPATH,"//*@class='DY5T1d RZIKme']")))
articlelist=driver.find_elements_by_xpath("//*[@class='DY5T1d RZIKme']")
for i in articlelist:
print(i.text,file=fileobj) #,file=fileobj >> to write to a file
driver.quit()
'''
此脚本在 python ide (eclipse>PyDev) 中运行良好，并且在终端中运行良好。 但是，我在 crontab 中安排了相同的时间（使用 crontab -e）。
* * * * * /usr/bin/python3 /Documents/morning_newspaper.py >> ~/Documents/cron.log 2>&1)
作业是 运行 但我收到以下错误：
Traceback (most recent call last): File "/home/leopard/Documents/morning_newspaper.py", line 22, in driver=webdriver.Firefox(firefox_binary=binary,executable_path='/usr/bin/geckodriver') File "/home/leopard/.local/lib/python3.8/site-packages/selenium/webdriver/firefox webdriver.py", line 170, in init RemoteWebDriver.init( File "/home/leopard/.local/lib/python3.8/site-packages/selenium/webdriver/remote/webdriver.py", line 157, in init self.start_session(capabilities, browser_profile) File "/home/leopard/.local/lib/python3.8/site-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session response = self.execute(Command.NEW_SESSION, parameters) File "/home/leopard/.local/lib/python3.8/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute self.error_handler.check_response(response) File "/home/leopard/.local/lib/python3.8/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response raise exception_class(message, screen, stacktrace) selenium.common.exceptions.WebDriverException: Message: Process unexpectedly closed with status 1
这是来自作业的系统日志片段：
Feb 8 12:23:01 leopard CRON[7344]: (leopard) CMD (/usr/bin/python3 /Documents/morning_newspaper.py >> ~/Documents/cron.log 2>&1) Feb 8 12:23:01 leopard dbus-daemon[1552]: [session uid=1000 pid=1552] Activating via systemd: service name='org.freedesktop.Tracker1' unit='tracker-store.service' requested by ':1.1' (uid=1000 pid=1548 comm="/usr/libexec/tracker-miner-fs " label="unconfined") Feb 8 12:23:01 leopard systemd[1540]: Starting Tracker metadata database store and lookup manager... Feb 8 12:23:01 leopard dbus-daemon[1552]: [session uid=1000 pid=1552] Successfully activated service 'org.freedesktop.Tracker1' Feb 8 12:23:01 leopard systemd[1540]: Started Tracker metadata database store and lookup manager. Feb 8 12:23:01 leopard dbus-daemon[1552]: [session uid=1000 pid=1552] Activating via systemd: service name='org.freedesktop.Tracker1.Miner.Extract' unit='tracker-extract.service' requested by ':1.1' (uid=1000 pid=1548 comm="/usr/libexec/tracker-miner-fs " label="unconfined") Feb 8 12:23:01 leopard systemd[1540]: Starting Tracker metadata extractor... Feb 8 12:23:01 leopard tracker-extract[7356]: Set scheduler policy to SCHED_IDLE Feb 8 12:23:01 leopard tracker-extract[7356]: Setting priority nice level to 19 Feb 8 12:23:01 leopard dbus-daemon[1552]: [session uid=1000 pid=1552] Successfully activated service 'org.freedesktop.Tracker1.Miner.Extract' Feb 8 12:23:01 leopard systemd[1540]: Started Tracker metadata extractor. Feb 8 12:23:12 leopard systemd[1540]: tracker-extract.service: Succeeded. Feb 8 12:23:31 leopard tracker-store[7349]: OK Feb 8 12:23:31 leopard systemd[1540]: tracker-store.service: Succeeded.
最初，认为这是由于驱动程序启动造成的，因此添加了 Firefox 二进制文件和所有内容（来自 Whosebug 上的 post），但这不起作用。
感谢您提供预期的解决方案。 '''
cron 用于执行任务的 user/environment 可能没有 permission/ability 来启动 UI 进程。
要解决此问题，您可以使用无头模式：
...
binary = FirefoxBinary('/usr/bin/firefox')
binary.add_command_line_options('-headless')
...