I needed to take screenshots from websites that i crawl and selenium headless webdriver is the right tool for me. I was using wkhtmltoimage untill now but I am running into problems with some websites.
I’ll be using Debian Linux for this without a Desktop environment so i needed to install selenium headless webdriver and I decided to use Firefox as a web browser.
Selenium Headless WebDriver requirements
Since we don’t have a screen to run Firefox we are going to be using Xvfb to simulate a display and run everything in memory.
apt-get install xvfb
Now we are going to install Firefox and few requirements that maybe already installed on your system but here are anyway:
echo -e "\ndeb http://downloads.sourceforge.net/project/ubuntuzilla/mozilla/apt all main" | tee -a /etc/apt/sources.list > /dev/null apt-key adv --recv-keys --keyserver keyserver.ubuntu.com C1289A29 apt-get update apt-get install firefox-mozilla-build apt-get install libdbus-glib-1-2 apt-get install libgtk2.0-0 apt-get install libasound2
Now we need PyVirtualDisplay which is a python wrapper for Xvfb used for easy working with virtual displays in python.
pip install pyvirtualdisplay
Now we are going to install selenium as a final component for our project:
pip install selenium
Now here is a simple python script to take a screenshot from a website:
#!/usr/bin/env python from pyvirtualdisplay import Display from selenium import webdriver # Set screen resolution to 1366 x 768 like most 15" laptops display = Display(visible=0, size=(1366, 768)) display.start() # now Firefox will run in a virtual display. browser = webdriver.Firefox() # Sets the width and height of the current window browser.set_window_size(1366, 768) # Open the URL browser.get('http://www.vionblog.com/') # set timeouts browser.set_script_timeout(30) browser.set_page_load_timeout(30) # seconds # Take screenshot browser.save_screenshot('vionblog.png') # quit browser browser.quit() # quit Xvfb display display.stop()
This will create a file vionblog.png with the screenshot of http://www.vionblog.com front page taken with screen resolution of 1366 x 768
Hope this helps you in taking screenshots from the websites you need.