打印页面为 pdf selenium python

Question

How can I print a webpage as a PDF with headers and footers so it looks like it has been printed from google chrome.

This is what I have tried so far using PhantomJS but it doesn't have the headers and footers.

from selenium import webdriver
import selenium

def execute(script, args):
    driver.execute('executePhantomScript', {'script': script, 'args' : args })

driver = webdriver.PhantomJS('phantomjs')

# hack while the python interface lags
driver.command_executor._commands['executePhantomScript'] = ('POST', '/session/$sessionId/phantom/execute')

driver.get('http://stackoverflow.com')

# set page format
# inside the execution script, webpage is "this"
pageFormat = '''this.paperSize = {format: "A4", orientation: "portrait" };'''
execute(pageFormat, [])

# render current page
render = '''this.render("test.pdf")'''
execute(render, [])

Answer 1

This can be done using Selenium v4.1.3 by following pyppeteer examples.

You will need to be able to send commands to chromium and call Page.printToPDF Devtools API as shown in the following snip:

# ...
result = send_cmd(driver, "Page.printToPDF", params={
            'landscape': True
        ,'margin':{'top':'1cm', 'right':'1cm', 'bottom':'1cm', 'left':'1cm'}
        ,'format': 'A4'
        ,'displayHeaderFooter': True
        ,'headerTemplate': '<span style="font-size:8px; margin-left: 5px">Page 1 of 1</span>'
        ,'footerTemplate': f'<span style="font-size:8px; margin-left: 5px">Generated on {datetime.now().strftime("%-m/%-d/%Y at %H:%M")}</span>'
        ,'scale': 1.65
        ,'pageRanges': '1'
})

with open(out_path_full, 'wb') as file:
    file.write(base64.b64decode(result['data']))

# ...

def send_cmd(driver, cmd, params={}):
  response = driver.command_executor._request(
     'POST'
    ,f"{driver.command_executor._url}/session/{driver.session_id}/chromium/send_command_and_get_result"
    ,json.dumps({'cmd': cmd, 'params': params}))
  if response.get('status'): raise Exception(response.get('value'))
  return response.get('value')

I've included a full example in my GitHub Repo .

Answer 2

pdfkit may help you out. It will render a PDF from an html page.