在crontab中执行Python(Selenium)脚本 [英] Execute Python (selenium) script in crontab
问题描述
我已经在stackoverflow中阅读了大多数python/cron，但无法运行我的脚本.我知道我需要通过shell运行脚本(顺便使用zsh& ipython)，但实际上我不知道该怎么做:/
I have read most of the python/cron here in stackoverflow and yet couldn't make my script run. I understood that I need to run my script through shell (using zsh & ipython by the way), but really I have no idea what to do :/
我的简单代码:
在crontab中-
*/1 * * * * ipython /home/usr/Data/progs/cron_test.py
我的python脚本-
My python script-
import pickle
from selenium import webdriver
driver = webdriver.Firefox()
driver.get('http://www.google.com')
t=driver.current_url
pickle.dump(t,open('noreal','wb'))
我已经尝试了一些方法，但无济于事:
I have tried some things already but to no avail:
#!python ../python etc
SHELL = /usr/bin/zsh
PATH =/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
仅仅因为我不知道问题是什么，所以我假设通过解释器运行python脚本，但是我不知道我实际上在做什么:)
Simply because I don't know what the problem is, I assume something with running python script via interpreter, but I don't know what I am doing really :)
一个可行的解决方案将是一个很好的选择，我将不胜感激地附上任何解决方案的解释，以便我能理解为什么以及如何实现，而不仅仅是像 '有用！谢谢！再见！'
A working solution would be great, and I would really appreciate an explanation to accompany any solution so I could understand the why and how and not just be like 'It works! Thanks! Bye!'
感谢您的帮助！
更新 到目前为止，我已经缩小了问题的范围，现在python使用以下设置运行:
Update So far I have narrowed down the problem, and now python runs with the following settings:
*/3 * * * * /usr/local/bin/ipython /home/user/Data/progs/RF/cron_test.py
我得到了回溯:
[1;31m---------------------------------------------------------------------------[0m
[1;31mWebDriverException[0m Traceback (most recent call last)
[1;32m/usr/local/lib/python2.7/dist-packages/IPython/utils/py3compat.pyc[0m in [0;36mexecfile[1;34m(fname, *where)[0m
[0;32m 176[0m [1;32melse[0m[1;33m:[0m[1;33m[0m[0m
[0;32m 177[0m [0mfilename[0m [1;33m=[0m [0mfname[0m[1;33m[0m[0m
[1;32m--> 178[1;33m [0m__builtin__[0m[1;33m.[0m[0mexecfile[0m[1;33m([0m[0mfilename[0m[1;33m,[0m [1;33m*[0m[0mwhere[0m[1;33m)[0m[1;33m[0m[0m
[0m
[1;32m/home/user/Data/progs/FB/cron_test.py[0m in [0;36m<module>[1;34m()[0m
[0;32m 9[0m [1;33m[0m[0m
[0;32m 10[0m [1;33m[0m[0m
[1;32m---> 11[1;33m [0mdriver[0m [1;33m=[0m [0mwebdriver[0m[1;33m.[0m[0mFirefox[0m[1;33m([0m[1;33m)[0m[1;33m[0m[0m
[0m[0;32m 12[0m [0mdriver[0m[1;33m.[0m[0mget[0m[1;33m([0m[1;34m'http://www.google.com'[0m[1;33m)[0m[1;33m[0m[0m
[0;32m 13[0m [1;33m[0m[0m
[1;32m/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/webdriver.pyc[0m in [0;36m__init__[1;34m(self, firefox_profile, firefox_binary, timeout, capabilities, proxy)[0m
[0;32m 58[0m RemoteWebDriver.__init__(self,
[0;32m 59[0m command_executor=ExtensionConnection("127.0.0.1", self.profile,
[1;32m---> 60[1;33m self.binary, timeout),
[0m[0;32m 61[0m desired_capabilities=capabilities)
[0;32m 62[0m [0mself[0m[1;33m.[0m[0m_is_remote[0m [1;33m=[0m [0mFalse[0m[1;33m[0m[0m
[1;32m/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/extension_connection.pyc[0m in [0;36m__init__[1;34m(self, host, firefox_profile, firefox_binary, timeout)[0m
[0;32m 45[0m [0mself[0m[1;33m.[0m[0mprofile[0m[1;33m.[0m[0madd_extension[0m[1;33m([0m[1;33m)[0m[1;33m[0m[0m
[0;32m 46[0m [1;33m[0m[0m
[1;32m---> 47[1;33m [0mself[0m[1;33m.[0m[0mbinary[0m[1;33m.[0m[0mlaunch_browser[0m[1;33m([0m[0mself[0m[1;33m.[0m[0mprofile[0m[1;33m)[0m[1;33m[0m[0m
[0m[0;32m 48[0m [0m_URL[0m [1;33m=[0m [1;34m"http://%s:%d/hub"[0m [1;33m%[0m [1;33m([0m[0mHOST[0m[1;33m,[0m [0mPORT[0m[1;33m)[0m[1;33m[0m[0m
[0;32m 49[0m RemoteConnection.__init__(
[1;32m/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/firefox_binary.pyc[0m in [0;36mlaunch_browser[1;34m(self, profile)[0m
[0;32m 59[0m [1;33m[0m[0m
[0;32m 60[0m [0mself[0m[1;33m.[0m[0m_start_from_profile_path[0m[1;33m([0m[0mself[0m[1;33m.[0m[0mprofile[0m[1;33m.[0m[0mpath[0m[1;33m)[0m[1;33m[0m[0m
[1;32m---> 61[1;33m [0mself[0m[1;33m.[0m[0m_wait_until_connectable[0m[1;33m([0m[1;33m)[0m[1;33m[0m[0m
[0m[0;32m 62[0m [1;33m[0m[0m
[0;32m 63[0m [1;32mdef[0m [0mkill[0m[1;33m([0m[0mself[0m[1;33m)[0m[1;33m:[0m[1;33m[0m[0m
[1;32m/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/firefox_binary.pyc[0m in [0;36m_wait_until_connectable[1;34m(self)[0m
[0;32m 98[0m raise WebDriverException("The browser appears to have exited "
[0;32m 99[0m [1;34m"before we could connect. The output was: %s"[0m [1;33m%[0m[1;33m[0m[0m
[1;32m--> 100[1;33m self._get_firefox_output())
[0m[0;32m 101[0m [1;32mif[0m [0mcount[0m [1;33m==[0m [1;36m30[0m[1;33m:[0m[1;33m[0m[0m
[0;32m 102[0m [0mself[0m[1;33m.[0m[0mkill[0m[1;33m([0m[1;33m)[0m[1;33m[0m[0m
[1;31mWebDriverException[0m: Message: 'The browser appears to have exited before we could connect. The output was: Error: no display specified\n'
推荐答案
快速猜测，您的作业无法运行，因为它需要X会话.您应该将测试脚本设置为在无头模式下运行.选中此链接以以无头模式运行硒.
A quick guess, your job fails to run because it requires an X session. You should setup your test script to run in a headless mode. Check this link to run selenium in a headless mode.
更新:
您的踪迹正好说明了我的意思，firefox不能在没有X的情况下运行，如果需要，也不会显示.
update:
Your trace says exactly what I meant, firefox does not run without X, or a display if you want.
The output was: Error: no display specified\n'
为您省去更多麻烦，请阅读我发布的链接.
Save yourself more trouble, read the link I posted.
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