Does anyone know if it's possible to export HTML to PDF using the screenshot feature in Selenium Firefox WebDriver? I have a webpage which has print specific css which I need to download automatically. I understand that the screenshot feature takes a screenshot of the page as an image, but I was looking for a scalable PDF file which is good for print.
Screenshots in Selenium are saved as PNG. And PNG and PDF are different kind of formats. So Selenium cannot save your HTML page image directly as a PDF.
But, you could try to insert the PNG screenshot that Selenium takes and add it to a PDF.
Check this answer. Basically, you will need a library (like itext) and do something like:
// Take screenshot
driver.get("http://www.yourwebpage.com");
File screenshot = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);
FileUtils.copyFile(screenshot, new File("screenshot.png"));
// Create the PDF
Document document = new Document(PageSize.A4, 20, 20, 20, 20);
PdfWriter.getInstance(document, new FileOutputStream("my_web.pdf"));
document.open();
Image image = Image.getInstance(getClass().getResource("screenshot.png"));
document.add(image);
document.close();
Hope it helps!
EDIT
Since webs can be pretty high, you will probably need to check the documentation to see how you want to set your image in a PDF file.
A quick and easy way is to build an HTML file and embed the images as base64 data. You can then use any converter to get the document as a PDF.
An example with Python:
from selenium import webdriver
driver = webdriver.Firefox()
driver.get("https://www.google.co.uk");
# open new file
file = open(r"C:\temp\captures.html", "w")
file.write("<!DOCTYPE html><html><head></head><body width=\"600px\">")
# write image
file.write("<img src=\"data:image/png;base64,")
file.write(driver.get_screenshot_as_base64())
file.write("\">")
# close file
file.write("</body></html>")
file.close()
driver.quit()
Webdriver doesn't support "Export As PDF" function.
When you are not bound to Firefox and Webdriver, phantomjs could be an alternative. Phantomjs is a headless browser with the ability to take screenshots as PDF. The browser can be controlled directly by javascript.
来源：https://stackoverflow.com/questions/33692179/export-as-pdf-using-selenium-webdriver-screenshot