问题
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.
回答1:
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.
回答2:
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()
回答3:
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.
Example: http://phantomjs.org/screen-capture.html
来源：https://stackoverflow.com/questions/33692179/export-as-pdf-using-selenium-webdriver-screenshot