问题
老高最近遇到一个需求,linux\centos下,使用selenium技术抓取数据。本来很简单的问题,但是由于内存限制,安装X window不现实,所以一个BT的想法诞生了,是否可以在centos命令行界面运行一个虚拟的桌面,然后使用selenium控制Firefox浏览器完成一些操作,Firefox运行在虚拟的桌面中,一切操作都在命令行中完成。
Google之,发现了Xvfb,他可以新建一个虚拟的X窗口,再配合python的pyvirtualdisplay,简直就是神器!
安装
centos下:
# 安装Xvfb和pyvirtualdisplay
yum install xorg-x11-server-Xvfb
pip install pyvirtualdisplay
安装firefox和selenium
yum install firefox
pip install selenium
代码
from pyvirtualdisplay import Display
from selenium import webdriver
display = Display(visible=0, size=(800, 600))
display.start()
browser = webdriver.Firefox()
browser.get('http://www.google.com')
print browser.title
browser.quit()
display.stop()
参考网站:
http://selenium-python.readthedocs.org/en/latest/getting-started.html http://nullege.com/codes/search/selenium.webdriver.Remote.find_elements_by_class_name http://www.opsview.com/forum/opsview-core/how-do-i/how-do-i-install-selenium-centos-server https://gist.github.com/textarcana/5855427 http://scraping.pro/use-headless-firefox-scraping-linux/ http://serverfault.com/questions/363827/how-can-i-run-firefox-on-centos-with-no-display https://realpython.com/blog/python/headless-selenium-testing-with-python-and-phantomjs/ https://pypi.python.org/pypi/selenium
http://www.ibm.com/developerworks/cn/opensource/os-php-designptrns/ http://www.cnblogs.com/fnng/p/3230768.html http://www.cnblogs.com/fnng/p/3157639.html http://www.cnblogs.com/fnng/p/3157639.html