mirror of
https://github.com/python/cpython.git
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697 lines
23 KiB
Python
Executable file
697 lines
23 KiB
Python
Executable file
#! /usr/bin/env python3
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"""Interfaces for launching and remotely controlling Web browsers."""
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# Maintained by Georg Brandl.
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import os
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import shlex
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import shutil
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import sys
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import subprocess
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import threading
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__all__ = ["Error", "open", "open_new", "open_new_tab", "get", "register"]
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class Error(Exception):
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pass
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_lock = threading.RLock()
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_browsers = {} # Dictionary of available browser controllers
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_tryorder = None # Preference order of available browsers
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_os_preferred_browser = None # The preferred browser
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def register(name, klass, instance=None, *, preferred=False):
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"""Register a browser connector."""
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with _lock:
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if _tryorder is None:
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register_standard_browsers()
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_browsers[name.lower()] = [klass, instance]
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# Preferred browsers go to the front of the list.
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# Need to match to the default browser returned by xdg-settings, which
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# may be of the form e.g. "firefox.desktop".
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if preferred or (_os_preferred_browser and name in _os_preferred_browser):
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_tryorder.insert(0, name)
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else:
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_tryorder.append(name)
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def get(using=None):
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"""Return a browser launcher instance appropriate for the environment."""
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if _tryorder is None:
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with _lock:
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if _tryorder is None:
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register_standard_browsers()
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if using is not None:
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alternatives = [using]
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else:
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alternatives = _tryorder
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for browser in alternatives:
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if '%s' in browser:
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# User gave us a command line, split it into name and args
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browser = shlex.split(browser)
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if browser[-1] == '&':
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return BackgroundBrowser(browser[:-1])
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else:
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return GenericBrowser(browser)
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else:
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# User gave us a browser name or path.
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try:
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command = _browsers[browser.lower()]
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except KeyError:
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command = _synthesize(browser)
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if command[1] is not None:
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return command[1]
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elif command[0] is not None:
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return command[0]()
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raise Error("could not locate runnable browser")
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# Please note: the following definition hides a builtin function.
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# It is recommended one does "import webbrowser" and uses webbrowser.open(url)
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# instead of "from webbrowser import *".
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def open(url, new=0, autoraise=True):
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if _tryorder is None:
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with _lock:
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if _tryorder is None:
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register_standard_browsers()
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for name in _tryorder:
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browser = get(name)
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if browser.open(url, new, autoraise):
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return True
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return False
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def open_new(url):
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return open(url, 1)
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def open_new_tab(url):
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return open(url, 2)
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def _synthesize(browser, *, preferred=False):
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"""Attempt to synthesize a controller base on existing controllers.
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This is useful to create a controller when a user specifies a path to
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an entry in the BROWSER environment variable -- we can copy a general
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controller to operate using a specific installation of the desired
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browser in this way.
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If we can't create a controller in this way, or if there is no
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executable for the requested browser, return [None, None].
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"""
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cmd = browser.split()[0]
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if not shutil.which(cmd):
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return [None, None]
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name = os.path.basename(cmd)
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try:
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command = _browsers[name.lower()]
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except KeyError:
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return [None, None]
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# now attempt to clone to fit the new name:
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controller = command[1]
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if controller and name.lower() == controller.basename:
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import copy
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controller = copy.copy(controller)
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controller.name = browser
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controller.basename = os.path.basename(browser)
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register(browser, None, instance=controller, preferred=preferred)
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return [None, controller]
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return [None, None]
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# General parent classes
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class BaseBrowser(object):
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"""Parent class for all browsers. Do not use directly."""
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args = ['%s']
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def __init__(self, name=""):
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self.name = name
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self.basename = name
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def open(self, url, new=0, autoraise=True):
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raise NotImplementedError
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def open_new(self, url):
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return self.open(url, 1)
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def open_new_tab(self, url):
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return self.open(url, 2)
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class GenericBrowser(BaseBrowser):
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"""Class for all browsers started with a command
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and without remote functionality."""
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def __init__(self, name):
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if isinstance(name, str):
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self.name = name
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self.args = ["%s"]
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else:
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# name should be a list with arguments
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self.name = name[0]
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self.args = name[1:]
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self.basename = os.path.basename(self.name)
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def open(self, url, new=0, autoraise=True):
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sys.audit("webbrowser.open", url)
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cmdline = [self.name] + [arg.replace("%s", url)
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for arg in self.args]
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try:
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if sys.platform[:3] == 'win':
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p = subprocess.Popen(cmdline)
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else:
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p = subprocess.Popen(cmdline, close_fds=True)
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return not p.wait()
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except OSError:
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return False
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class BackgroundBrowser(GenericBrowser):
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"""Class for all browsers which are to be started in the
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background."""
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def open(self, url, new=0, autoraise=True):
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cmdline = [self.name] + [arg.replace("%s", url)
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for arg in self.args]
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sys.audit("webbrowser.open", url)
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try:
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if sys.platform[:3] == 'win':
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p = subprocess.Popen(cmdline)
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else:
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p = subprocess.Popen(cmdline, close_fds=True,
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start_new_session=True)
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return (p.poll() is None)
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except OSError:
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return False
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class UnixBrowser(BaseBrowser):
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"""Parent class for all Unix browsers with remote functionality."""
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raise_opts = None
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background = False
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redirect_stdout = True
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# In remote_args, %s will be replaced with the requested URL. %action will
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# be replaced depending on the value of 'new' passed to open.
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# remote_action is used for new=0 (open). If newwin is not None, it is
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# used for new=1 (open_new). If newtab is not None, it is used for
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# new=3 (open_new_tab). After both substitutions are made, any empty
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# strings in the transformed remote_args list will be removed.
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remote_args = ['%action', '%s']
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remote_action = None
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remote_action_newwin = None
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remote_action_newtab = None
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def _invoke(self, args, remote, autoraise, url=None):
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raise_opt = []
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if remote and self.raise_opts:
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# use autoraise argument only for remote invocation
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autoraise = int(autoraise)
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opt = self.raise_opts[autoraise]
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if opt: raise_opt = [opt]
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cmdline = [self.name] + raise_opt + args
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if remote or self.background:
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inout = subprocess.DEVNULL
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else:
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# for TTY browsers, we need stdin/out
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inout = None
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p = subprocess.Popen(cmdline, close_fds=True, stdin=inout,
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stdout=(self.redirect_stdout and inout or None),
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stderr=inout, start_new_session=True)
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if remote:
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# wait at most five seconds. If the subprocess is not finished, the
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# remote invocation has (hopefully) started a new instance.
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try:
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rc = p.wait(5)
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# if remote call failed, open() will try direct invocation
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return not rc
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except subprocess.TimeoutExpired:
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return True
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elif self.background:
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if p.poll() is None:
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return True
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else:
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return False
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else:
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return not p.wait()
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def open(self, url, new=0, autoraise=True):
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sys.audit("webbrowser.open", url)
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if new == 0:
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action = self.remote_action
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elif new == 1:
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action = self.remote_action_newwin
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elif new == 2:
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if self.remote_action_newtab is None:
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action = self.remote_action_newwin
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else:
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action = self.remote_action_newtab
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else:
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raise Error("Bad 'new' parameter to open(); " +
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"expected 0, 1, or 2, got %s" % new)
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args = [arg.replace("%s", url).replace("%action", action)
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for arg in self.remote_args]
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args = [arg for arg in args if arg]
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success = self._invoke(args, True, autoraise, url)
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if not success:
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# remote invocation failed, try straight way
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args = [arg.replace("%s", url) for arg in self.args]
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return self._invoke(args, False, False)
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else:
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return True
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class Mozilla(UnixBrowser):
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"""Launcher class for Mozilla browsers."""
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remote_args = ['%action', '%s']
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remote_action = ""
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remote_action_newwin = "-new-window"
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remote_action_newtab = "-new-tab"
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background = True
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class Netscape(UnixBrowser):
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"""Launcher class for Netscape browser."""
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raise_opts = ["-noraise", "-raise"]
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remote_args = ['-remote', 'openURL(%s%action)']
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remote_action = ""
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remote_action_newwin = ",new-window"
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remote_action_newtab = ",new-tab"
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background = True
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class Galeon(UnixBrowser):
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"""Launcher class for Galeon/Epiphany browsers."""
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raise_opts = ["-noraise", ""]
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remote_args = ['%action', '%s']
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remote_action = "-n"
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remote_action_newwin = "-w"
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background = True
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class Chrome(UnixBrowser):
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"Launcher class for Google Chrome browser."
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remote_args = ['%action', '%s']
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remote_action = ""
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remote_action_newwin = "--new-window"
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remote_action_newtab = ""
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background = True
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Chromium = Chrome
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class Opera(UnixBrowser):
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"Launcher class for Opera browser."
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remote_args = ['%action', '%s']
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remote_action = ""
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remote_action_newwin = "--new-window"
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remote_action_newtab = ""
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background = True
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class Elinks(UnixBrowser):
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"Launcher class for Elinks browsers."
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remote_args = ['-remote', 'openURL(%s%action)']
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remote_action = ""
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remote_action_newwin = ",new-window"
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remote_action_newtab = ",new-tab"
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background = False
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# elinks doesn't like its stdout to be redirected -
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# it uses redirected stdout as a signal to do -dump
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redirect_stdout = False
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class Konqueror(BaseBrowser):
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"""Controller for the KDE File Manager (kfm, or Konqueror).
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See the output of ``kfmclient --commands``
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for more information on the Konqueror remote-control interface.
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"""
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def open(self, url, new=0, autoraise=True):
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sys.audit("webbrowser.open", url)
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# XXX Currently I know no way to prevent KFM from opening a new win.
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if new == 2:
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action = "newTab"
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else:
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action = "openURL"
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devnull = subprocess.DEVNULL
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try:
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p = subprocess.Popen(["kfmclient", action, url],
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close_fds=True, stdin=devnull,
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stdout=devnull, stderr=devnull)
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except OSError:
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# fall through to next variant
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pass
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else:
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p.wait()
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# kfmclient's return code unfortunately has no meaning as it seems
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return True
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try:
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p = subprocess.Popen(["konqueror", "--silent", url],
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close_fds=True, stdin=devnull,
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stdout=devnull, stderr=devnull,
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start_new_session=True)
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except OSError:
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# fall through to next variant
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pass
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else:
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if p.poll() is None:
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# Should be running now.
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return True
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try:
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p = subprocess.Popen(["kfm", "-d", url],
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close_fds=True, stdin=devnull,
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stdout=devnull, stderr=devnull,
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start_new_session=True)
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except OSError:
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return False
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else:
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return (p.poll() is None)
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class Grail(BaseBrowser):
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# There should be a way to maintain a connection to Grail, but the
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# Grail remote control protocol doesn't really allow that at this
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# point. It probably never will!
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def _find_grail_rc(self):
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import glob
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import pwd
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import socket
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import tempfile
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tempdir = os.path.join(tempfile.gettempdir(),
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".grail-unix")
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user = pwd.getpwuid(os.getuid())[0]
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filename = os.path.join(tempdir, user + "-*")
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maybes = glob.glob(filename)
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if not maybes:
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return None
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s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
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for fn in maybes:
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# need to PING each one until we find one that's live
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try:
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s.connect(fn)
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except OSError:
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# no good; attempt to clean it out, but don't fail:
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try:
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os.unlink(fn)
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except OSError:
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pass
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else:
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return s
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def _remote(self, action):
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s = self._find_grail_rc()
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if not s:
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return 0
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s.send(action)
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s.close()
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return 1
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def open(self, url, new=0, autoraise=True):
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sys.audit("webbrowser.open", url)
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if new:
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ok = self._remote("LOADNEW " + url)
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else:
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ok = self._remote("LOAD " + url)
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return ok
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#
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# Platform support for Unix
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#
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# These are the right tests because all these Unix browsers require either
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# a console terminal or an X display to run.
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def register_X_browsers():
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# use xdg-open if around
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if shutil.which("xdg-open"):
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register("xdg-open", None, BackgroundBrowser("xdg-open"))
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# The default GNOME3 browser
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if "GNOME_DESKTOP_SESSION_ID" in os.environ and shutil.which("gvfs-open"):
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register("gvfs-open", None, BackgroundBrowser("gvfs-open"))
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# The default GNOME browser
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if "GNOME_DESKTOP_SESSION_ID" in os.environ and shutil.which("gnome-open"):
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register("gnome-open", None, BackgroundBrowser("gnome-open"))
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# The default KDE browser
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if "KDE_FULL_SESSION" in os.environ and shutil.which("kfmclient"):
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register("kfmclient", Konqueror, Konqueror("kfmclient"))
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if shutil.which("x-www-browser"):
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register("x-www-browser", None, BackgroundBrowser("x-www-browser"))
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# The Mozilla browsers
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for browser in ("firefox", "iceweasel", "iceape", "seamonkey"):
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if shutil.which(browser):
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register(browser, None, Mozilla(browser))
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# The Netscape and old Mozilla browsers
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for browser in ("mozilla-firefox",
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"mozilla-firebird", "firebird",
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"mozilla", "netscape"):
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if shutil.which(browser):
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register(browser, None, Netscape(browser))
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# Konqueror/kfm, the KDE browser.
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if shutil.which("kfm"):
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register("kfm", Konqueror, Konqueror("kfm"))
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elif shutil.which("konqueror"):
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register("konqueror", Konqueror, Konqueror("konqueror"))
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# Gnome's Galeon and Epiphany
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for browser in ("galeon", "epiphany"):
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if shutil.which(browser):
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register(browser, None, Galeon(browser))
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# Skipstone, another Gtk/Mozilla based browser
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if shutil.which("skipstone"):
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register("skipstone", None, BackgroundBrowser("skipstone"))
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# Google Chrome/Chromium browsers
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for browser in ("google-chrome", "chrome", "chromium", "chromium-browser"):
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if shutil.which(browser):
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register(browser, None, Chrome(browser))
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# Opera, quite popular
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if shutil.which("opera"):
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register("opera", None, Opera("opera"))
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# Next, Mosaic -- old but still in use.
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if shutil.which("mosaic"):
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register("mosaic", None, BackgroundBrowser("mosaic"))
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# Grail, the Python browser. Does anybody still use it?
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if shutil.which("grail"):
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register("grail", Grail, None)
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def register_standard_browsers():
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global _tryorder
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_tryorder = []
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if sys.platform == 'darwin':
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register("MacOSX", None, MacOSXOSAScript('default'))
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register("chrome", None, MacOSXOSAScript('chrome'))
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register("firefox", None, MacOSXOSAScript('firefox'))
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register("safari", None, MacOSXOSAScript('safari'))
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# OS X can use below Unix support (but we prefer using the OS X
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# specific stuff)
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if sys.platform[:3] == "win":
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# First try to use the default Windows browser
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register("windows-default", WindowsDefault)
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# Detect some common Windows browsers, fallback to IE
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iexplore = os.path.join(os.environ.get("PROGRAMFILES", "C:\\Program Files"),
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"Internet Explorer\\IEXPLORE.EXE")
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for browser in ("firefox", "firebird", "seamonkey", "mozilla",
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"netscape", "opera", iexplore):
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if shutil.which(browser):
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register(browser, None, BackgroundBrowser(browser))
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else:
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# Prefer X browsers if present
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if os.environ.get("DISPLAY"):
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try:
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cmd = "xdg-settings get default-web-browser".split()
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|
raw_result = subprocess.check_output(cmd, stderr=subprocess.DEVNULL)
|
|
result = raw_result.decode().strip()
|
|
except (FileNotFoundError, subprocess.CalledProcessError):
|
|
pass
|
|
else:
|
|
global _os_preferred_browser
|
|
_os_preferred_browser = result
|
|
|
|
register_X_browsers()
|
|
|
|
# Also try console browsers
|
|
if os.environ.get("TERM"):
|
|
if shutil.which("www-browser"):
|
|
register("www-browser", None, GenericBrowser("www-browser"))
|
|
# The Links/elinks browsers <http://artax.karlin.mff.cuni.cz/~mikulas/links/>
|
|
if shutil.which("links"):
|
|
register("links", None, GenericBrowser("links"))
|
|
if shutil.which("elinks"):
|
|
register("elinks", None, Elinks("elinks"))
|
|
# The Lynx browser <http://lynx.isc.org/>, <http://lynx.browser.org/>
|
|
if shutil.which("lynx"):
|
|
register("lynx", None, GenericBrowser("lynx"))
|
|
# The w3m browser <http://w3m.sourceforge.net/>
|
|
if shutil.which("w3m"):
|
|
register("w3m", None, GenericBrowser("w3m"))
|
|
|
|
# OK, now that we know what the default preference orders for each
|
|
# platform are, allow user to override them with the BROWSER variable.
|
|
if "BROWSER" in os.environ:
|
|
userchoices = os.environ["BROWSER"].split(os.pathsep)
|
|
userchoices.reverse()
|
|
|
|
# Treat choices in same way as if passed into get() but do register
|
|
# and prepend to _tryorder
|
|
for cmdline in userchoices:
|
|
if cmdline != '':
|
|
cmd = _synthesize(cmdline, preferred=True)
|
|
if cmd[1] is None:
|
|
register(cmdline, None, GenericBrowser(cmdline), preferred=True)
|
|
|
|
# what to do if _tryorder is now empty?
|
|
|
|
|
|
#
|
|
# Platform support for Windows
|
|
#
|
|
|
|
if sys.platform[:3] == "win":
|
|
class WindowsDefault(BaseBrowser):
|
|
def open(self, url, new=0, autoraise=True):
|
|
sys.audit("webbrowser.open", url)
|
|
try:
|
|
os.startfile(url)
|
|
except OSError:
|
|
# [Error 22] No application is associated with the specified
|
|
# file for this operation: '<URL>'
|
|
return False
|
|
else:
|
|
return True
|
|
|
|
#
|
|
# Platform support for MacOS
|
|
#
|
|
|
|
if sys.platform == 'darwin':
|
|
# Adapted from patch submitted to SourceForge by Steven J. Burr
|
|
class MacOSX(BaseBrowser):
|
|
"""Launcher class for Aqua browsers on Mac OS X
|
|
|
|
Optionally specify a browser name on instantiation. Note that this
|
|
will not work for Aqua browsers if the user has moved the application
|
|
package after installation.
|
|
|
|
If no browser is specified, the default browser, as specified in the
|
|
Internet System Preferences panel, will be used.
|
|
"""
|
|
def __init__(self, name):
|
|
self.name = name
|
|
|
|
def open(self, url, new=0, autoraise=True):
|
|
sys.audit("webbrowser.open", url)
|
|
assert "'" not in url
|
|
# hack for local urls
|
|
if not ':' in url:
|
|
url = 'file:'+url
|
|
|
|
# new must be 0 or 1
|
|
new = int(bool(new))
|
|
if self.name == "default":
|
|
# User called open, open_new or get without a browser parameter
|
|
script = 'open location "%s"' % url.replace('"', '%22') # opens in default browser
|
|
else:
|
|
# User called get and chose a browser
|
|
if self.name == "OmniWeb":
|
|
toWindow = ""
|
|
else:
|
|
# Include toWindow parameter of OpenURL command for browsers
|
|
# that support it. 0 == new window; -1 == existing
|
|
toWindow = "toWindow %d" % (new - 1)
|
|
cmd = 'OpenURL "%s"' % url.replace('"', '%22')
|
|
script = '''tell application "%s"
|
|
activate
|
|
%s %s
|
|
end tell''' % (self.name, cmd, toWindow)
|
|
# Open pipe to AppleScript through osascript command
|
|
osapipe = os.popen("osascript", "w")
|
|
if osapipe is None:
|
|
return False
|
|
# Write script to osascript's stdin
|
|
osapipe.write(script)
|
|
rc = osapipe.close()
|
|
return not rc
|
|
|
|
class MacOSXOSAScript(BaseBrowser):
|
|
def __init__(self, name):
|
|
self._name = name
|
|
|
|
def open(self, url, new=0, autoraise=True):
|
|
if self._name == 'default':
|
|
script = 'open location "%s"' % url.replace('"', '%22') # opens in default browser
|
|
else:
|
|
script = '''
|
|
tell application "%s"
|
|
activate
|
|
open location "%s"
|
|
end
|
|
'''%(self._name, url.replace('"', '%22'))
|
|
|
|
osapipe = os.popen("osascript", "w")
|
|
if osapipe is None:
|
|
return False
|
|
|
|
osapipe.write(script)
|
|
rc = osapipe.close()
|
|
return not rc
|
|
|
|
|
|
def main():
|
|
import getopt
|
|
usage = """Usage: %s [-n | -t] url
|
|
-n: open new window
|
|
-t: open new tab""" % sys.argv[0]
|
|
try:
|
|
opts, args = getopt.getopt(sys.argv[1:], 'ntd')
|
|
except getopt.error as msg:
|
|
print(msg, file=sys.stderr)
|
|
print(usage, file=sys.stderr)
|
|
sys.exit(1)
|
|
new_win = 0
|
|
for o, a in opts:
|
|
if o == '-n': new_win = 1
|
|
elif o == '-t': new_win = 2
|
|
if len(args) != 1:
|
|
print(usage, file=sys.stderr)
|
|
sys.exit(1)
|
|
|
|
url = args[0]
|
|
open(url, new_win)
|
|
|
|
print("\a")
|
|
|
|
if __name__ == "__main__":
|
|
main()
|