Get page source with running chrome instance in MacOS

view_source_chrome.py

import sys
import time
import objc
from ScriptingBridge import SBApplication

import Foundation
import AppKit

# Hide python rocket ship from popping up in Dock when run.
import AppKit
info = AppKit.NSBundle.mainBundle().infoDictionary()
info['CFBundleIconFile'] = u'PythonApplet.icns'
info['LSUIElement'] = True

chrome = SBApplication.applicationWithBundleIdentifier_("com.google.Chrome")

if chrome.isRunning():
    windows = chrome.windows()

    frontmost_window = chrome.windows()[0] if chrome.windows() else None
    tab = frontmost_window.activeTab()

    # tab.setURL_("https://news.ycombinator.com/news")
    tab.setURL_("view-source:https://news.ycombinator.com/news")
    time.sleep(0.5)
    tab.viewSource()
    time.sleep(0.5)
    tab.selectAll()
    time.sleep(0.5)
    tab.copySelection()
    time.sleep(0.5)
    tab.close()

    # Get the general pasteboard
    pasteboard = AppKit.NSPasteboard.generalPasteboard()

    # Get the content of the clipboard
    clipboard_content = pasteboard.stringForType_(AppKit.NSStringPboardType)
    print(clipboard_content)