[issue8232] webbrowser.open incomplete on Windows
Eryk Sun
report at bugs.python.org
Thu Mar 18 03:42:50 EDT 2021
Eryk Sun <eryksun at gmail.com> added the comment:
Windows Vista is no longer a concern, so find_windows_browsers() doesn't have to worry about the KEY_WOW64_* flags. IMO, it should get the browser's real name (the default value of the key) and the fully-qualified path of the executable, instead of depending solely on an "App Paths" entry being configured for the base executable name. For example:
def find_windows_browsers():
""" Read the installed browsers from the Windows registry."""
import winreg
browsers = []
with winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE,
r"Software\Clients\StartMenuInternet") as hkey:
i = 0
while True:
try:
subkey = winreg.EnumKey(hkey, i)
i += 1
except OSError as e:
if e.winerror != 259: # ERROR_NO_MORE_ITEMS
raise
break
try:
name = winreg.QueryValue(hkey, subkey)
if not name or not isinstance(name, str):
name = subkey
except OSError:
name = subkey
try:
cmd = winreg.QueryValue(hkey, rf"{subkey}\shell\open\command")
cmd = cmd.strip('"')
os.stat(cmd)
except (OSError, AttributeError, TypeError, ValueError):
cmd = ""
browsers.append((name, cmd))
return browsers
The loop over the result would change to `for browser, cmd in find_windows_browsers()`. The string to match for Internet Explorer, using the real name instead of the registry key name, would be "internet explorer". A class for Microsoft Edge ("msedge") should be added.
The browser would get instantiated with the cmd value, which ideally is the fully-qualified path of the executable. The fallback behavior wouldn't change for the case where self.cmd is an empty string. For example:
class WindowsDefault(BaseBrowser):
cmd = newwindow = newtab = ""
def __init__(self, name="", cmd=""):
super().__init__(name)
if cmd:
self.cmd = cmd
...
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<https://bugs.python.org/issue8232>
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