python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Lib/webbrowser.py

@@ -0,0 +1,663 @@
+#! /usr/bin/env python3
+"""Interfaces for launching and remotely controlling Web browsers."""
+# Maintained by Georg Brandl.
+
+import os
+import shlex
+import shutil
+import sys
+import subprocess
+
+__all__ = ["Error", "open", "open_new", "open_new_tab", "get", "register"]
+
+class Error(Exception):
+    pass
+
+_browsers = {}          # Dictionary of available browser controllers
+_tryorder = []          # Preference order of available browsers
+
+def register(name, klass, instance=None, update_tryorder=1):
+    """Register a browser connector and, optionally, connection."""
+    _browsers[name.lower()] = [klass, instance]
+    if update_tryorder > 0:
+        _tryorder.append(name)
+    elif update_tryorder < 0:
+        _tryorder.insert(0, name)
+
+def get(using=None):
+    """Return a browser launcher instance appropriate for the environment."""
+    if using is not None:
+        alternatives = [using]
+    else:
+        alternatives = _tryorder
+    for browser in alternatives:
+        if '%s' in browser:
+            # User gave us a command line, split it into name and args
+            browser = shlex.split(browser)
+            if browser[-1] == '&':
+                return BackgroundBrowser(browser[:-1])
+            else:
+                return GenericBrowser(browser)
+        else:
+            # User gave us a browser name or path.
+            try:
+                command = _browsers[browser.lower()]
+            except KeyError:
+                command = _synthesize(browser)
+            if command[1] is not None:
+                return command[1]
+            elif command[0] is not None:
+                return command[0]()
+    raise Error("could not locate runnable browser")
+
+# Please note: the following definition hides a builtin function.
+# It is recommended one does "import webbrowser" and uses webbrowser.open(url)
+# instead of "from webbrowser import *".
+
+def open(url, new=0, autoraise=True):
+    for name in _tryorder:
+        browser = get(name)
+        if browser.open(url, new, autoraise):
+            return True
+    return False
+
+def open_new(url):
+    return open(url, 1)
+
+def open_new_tab(url):
+    return open(url, 2)
+
+
+def _synthesize(browser, update_tryorder=1):
+    """Attempt to synthesize a controller base on existing controllers.
+
+    This is useful to create a controller when a user specifies a path to
+    an entry in the BROWSER environment variable -- we can copy a general
+    controller to operate using a specific installation of the desired
+    browser in this way.
+
+    If we can't create a controller in this way, or if there is no
+    executable for the requested browser, return [None, None].
+
+    """
+    cmd = browser.split()[0]
+    if not shutil.which(cmd):
+        return [None, None]
+    name = os.path.basename(cmd)
+    try:
+        command = _browsers[name.lower()]
+    except KeyError:
+        return [None, None]
+    # now attempt to clone to fit the new name:
+    controller = command[1]
+    if controller and name.lower() == controller.basename:
+        import copy
+        controller = copy.copy(controller)
+        controller.name = browser
+        controller.basename = os.path.basename(browser)
+        register(browser, None, controller, update_tryorder)
+        return [None, controller]
+    return [None, None]
+
+
+# General parent classes
+
+class BaseBrowser(object):
+    """Parent class for all browsers. Do not use directly."""
+
+    args = ['%s']
+
+    def __init__(self, name=""):
+        self.name = name
+        self.basename = name
+
+    def open(self, url, new=0, autoraise=True):
+        raise NotImplementedError
+
+    def open_new(self, url):
+        return self.open(url, 1)
+
+    def open_new_tab(self, url):
+        return self.open(url, 2)
+
+
+class GenericBrowser(BaseBrowser):
+    """Class for all browsers started with a command
+       and without remote functionality."""
+
+    def __init__(self, name):
+        if isinstance(name, str):
+            self.name = name
+            self.args = ["%s"]
+        else:
+            # name should be a list with arguments
+            self.name = name[0]
+            self.args = name[1:]
+        self.basename = os.path.basename(self.name)
+
+    def open(self, url, new=0, autoraise=True):
+        cmdline = [self.name] + [arg.replace("%s", url)
+                                 for arg in self.args]
+        try:
+            if sys.platform[:3] == 'win':
+                p = subprocess.Popen(cmdline)
+            else:
+                p = subprocess.Popen(cmdline, close_fds=True)
+            return not p.wait()
+        except OSError:
+            return False
+
+
+class BackgroundBrowser(GenericBrowser):
+    """Class for all browsers which are to be started in the
+       background."""
+
+    def open(self, url, new=0, autoraise=True):
+        cmdline = [self.name] + [arg.replace("%s", url)
+                                 for arg in self.args]
+        try:
+            if sys.platform[:3] == 'win':
+                p = subprocess.Popen(cmdline)
+            else:
+                p = subprocess.Popen(cmdline, close_fds=True,
+                                     start_new_session=True)
+            return (p.poll() is None)
+        except OSError:
+            return False
+
+
+class UnixBrowser(BaseBrowser):
+    """Parent class for all Unix browsers with remote functionality."""
+
+    raise_opts = None
+    background = False
+    redirect_stdout = True
+    # In remote_args, %s will be replaced with the requested URL.  %action will
+    # be replaced depending on the value of 'new' passed to open.
+    # remote_action is used for new=0 (open).  If newwin is not None, it is
+    # used for new=1 (open_new).  If newtab is not None, it is used for
+    # new=3 (open_new_tab).  After both substitutions are made, any empty
+    # strings in the transformed remote_args list will be removed.
+    remote_args = ['%action', '%s']
+    remote_action = None
+    remote_action_newwin = None
+    remote_action_newtab = None
+
+    def _invoke(self, args, remote, autoraise):
+        raise_opt = []
+        if remote and self.raise_opts:
+            # use autoraise argument only for remote invocation
+            autoraise = int(autoraise)
+            opt = self.raise_opts[autoraise]
+            if opt: raise_opt = [opt]
+
+        cmdline = [self.name] + raise_opt + args
+
+        if remote or self.background:
+            inout = subprocess.DEVNULL
+        else:
+            # for TTY browsers, we need stdin/out
+            inout = None
+        p = subprocess.Popen(cmdline, close_fds=True, stdin=inout,
+                             stdout=(self.redirect_stdout and inout or None),
+                             stderr=inout, start_new_session=True)
+        if remote:
+            # wait at most five seconds. If the subprocess is not finished, the
+            # remote invocation has (hopefully) started a new instance.
+            try:
+                rc = p.wait(5)
+                # if remote call failed, open() will try direct invocation
+                return not rc
+            except subprocess.TimeoutExpired:
+                return True
+        elif self.background:
+            if p.poll() is None:
+                return True
+            else:
+                return False
+        else:
+            return not p.wait()
+
+    def open(self, url, new=0, autoraise=True):
+        if new == 0:
+            action = self.remote_action
+        elif new == 1:
+            action = self.remote_action_newwin
+        elif new == 2:
+            if self.remote_action_newtab is None:
+                action = self.remote_action_newwin
+            else:
+                action = self.remote_action_newtab
+        else:
+            raise Error("Bad 'new' parameter to open(); " +
+                        "expected 0, 1, or 2, got %s" % new)
+
+        args = [arg.replace("%s", url).replace("%action", action)
+                for arg in self.remote_args]
+        args = [arg for arg in args if arg]
+        success = self._invoke(args, True, autoraise)
+        if not success:
+            # remote invocation failed, try straight way
+            args = [arg.replace("%s", url) for arg in self.args]
+            return self._invoke(args, False, False)
+        else:
+            return True
+
+
+class Mozilla(UnixBrowser):
+    """Launcher class for Mozilla browsers."""
+
+    remote_args = ['%action', '%s']
+    remote_action = ""
+    remote_action_newwin = "-new-window"
+    remote_action_newtab = "-new-tab"
+    background = True
+
+
+class Netscape(UnixBrowser):
+    """Launcher class for Netscape browser."""
+
+    raise_opts = ["-noraise", "-raise"]
+    remote_args = ['-remote', 'openURL(%s%action)']
+    remote_action = ""
+    remote_action_newwin = ",new-window"
+    remote_action_newtab = ",new-tab"
+    background = True
+
+
+class Galeon(UnixBrowser):
+    """Launcher class for Galeon/Epiphany browsers."""
+
+    raise_opts = ["-noraise", ""]
+    remote_args = ['%action', '%s']
+    remote_action = "-n"
+    remote_action_newwin = "-w"
+    background = True
+
+
+class Chrome(UnixBrowser):
+    "Launcher class for Google Chrome browser."
+
+    remote_args = ['%action', '%s']
+    remote_action = ""
+    remote_action_newwin = "--new-window"
+    remote_action_newtab = ""
+    background = True
+
+Chromium = Chrome
+
+
+class Opera(UnixBrowser):
+    "Launcher class for Opera browser."
+
+    remote_args = ['%action', '%s']
+    remote_action = ""
+    remote_action_newwin = "--new-window"
+    remote_action_newtab = ""
+    background = True
+
+
+class Elinks(UnixBrowser):
+    "Launcher class for Elinks browsers."
+
+    remote_args = ['-remote', 'openURL(%s%action)']
+    remote_action = ""
+    remote_action_newwin = ",new-window"
+    remote_action_newtab = ",new-tab"
+    background = False
+
+    # elinks doesn't like its stdout to be redirected -
+    # it uses redirected stdout as a signal to do -dump
+    redirect_stdout = False
+
+
+class Konqueror(BaseBrowser):
+    """Controller for the KDE File Manager (kfm, or Konqueror).
+
+    See the output of ``kfmclient --commands``
+    for more information on the Konqueror remote-control interface.
+    """
+
+    def open(self, url, new=0, autoraise=True):
+        # XXX Currently I know no way to prevent KFM from opening a new win.
+        if new == 2:
+            action = "newTab"
+        else:
+            action = "openURL"
+
+        devnull = subprocess.DEVNULL
+
+        try:
+            p = subprocess.Popen(["kfmclient", action, url],
+                                 close_fds=True, stdin=devnull,
+                                 stdout=devnull, stderr=devnull)
+        except OSError:
+            # fall through to next variant
+            pass
+        else:
+            p.wait()
+            # kfmclient's return code unfortunately has no meaning as it seems
+            return True
+
+        try:
+            p = subprocess.Popen(["konqueror", "--silent", url],
+                                 close_fds=True, stdin=devnull,
+                                 stdout=devnull, stderr=devnull,
+                                 start_new_session=True)
+        except OSError:
+            # fall through to next variant
+            pass
+        else:
+            if p.poll() is None:
+                # Should be running now.
+                return True
+
+        try:
+            p = subprocess.Popen(["kfm", "-d", url],
+                                 close_fds=True, stdin=devnull,
+                                 stdout=devnull, stderr=devnull,
+                                 start_new_session=True)
+        except OSError:
+            return False
+        else:
+            return (p.poll() is None)
+
+
+class Grail(BaseBrowser):
+    # There should be a way to maintain a connection to Grail, but the
+    # Grail remote control protocol doesn't really allow that at this
+    # point.  It probably never will!
+    def _find_grail_rc(self):
+        import glob
+        import pwd
+        import socket
+        import tempfile
+        tempdir = os.path.join(tempfile.gettempdir(),
+                               ".grail-unix")
+        user = pwd.getpwuid(os.getuid())[0]
+        filename = os.path.join(tempdir, user + "-*")
+        maybes = glob.glob(filename)
+        if not maybes:
+            return None
+        s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+        for fn in maybes:
+            # need to PING each one until we find one that's live
+            try:
+                s.connect(fn)
+            except OSError:
+                # no good; attempt to clean it out, but don't fail:
+                try:
+                    os.unlink(fn)
+                except OSError:
+                    pass
+            else:
+                return s
+
+    def _remote(self, action):
+        s = self._find_grail_rc()
+        if not s:
+            return 0
+        s.send(action)
+        s.close()
+        return 1
+
+    def open(self, url, new=0, autoraise=True):
+        if new:
+            ok = self._remote("LOADNEW " + url)
+        else:
+            ok = self._remote("LOAD " + url)
+        return ok
+
+
+#
+# Platform support for Unix
+#
+
+# These are the right tests because all these Unix browsers require either
+# a console terminal or an X display to run.
+
+def register_X_browsers():
+
+    # use xdg-open if around
+    if shutil.which("xdg-open"):
+        register("xdg-open", None, BackgroundBrowser("xdg-open"))
+
+    # The default GNOME3 browser
+    if "GNOME_DESKTOP_SESSION_ID" in os.environ and shutil.which("gvfs-open"):
+        register("gvfs-open", None, BackgroundBrowser("gvfs-open"))
+
+    # The default GNOME browser
+    if "GNOME_DESKTOP_SESSION_ID" in os.environ and shutil.which("gnome-open"):
+        register("gnome-open", None, BackgroundBrowser("gnome-open"))
+
+    # The default KDE browser
+    if "KDE_FULL_SESSION" in os.environ and shutil.which("kfmclient"):
+        register("kfmclient", Konqueror, Konqueror("kfmclient"))
+
+    if shutil.which("x-www-browser"):
+        register("x-www-browser", None, BackgroundBrowser("x-www-browser"))
+
+    # The Mozilla browsers
+    for browser in ("firefox", "iceweasel", "iceape", "seamonkey"):
+        if shutil.which(browser):
+            register(browser, None, Mozilla(browser))
+
+    # The Netscape and old Mozilla browsers
+    for browser in ("mozilla-firefox",
+                    "mozilla-firebird", "firebird",
+                    "mozilla", "netscape"):
+        if shutil.which(browser):
+            register(browser, None, Netscape(browser))
+
+    # Konqueror/kfm, the KDE browser.
+    if shutil.which("kfm"):
+        register("kfm", Konqueror, Konqueror("kfm"))
+    elif shutil.which("konqueror"):
+        register("konqueror", Konqueror, Konqueror("konqueror"))
+
+    # Gnome's Galeon and Epiphany
+    for browser in ("galeon", "epiphany"):
+        if shutil.which(browser):
+            register(browser, None, Galeon(browser))
+
+    # Skipstone, another Gtk/Mozilla based browser
+    if shutil.which("skipstone"):
+        register("skipstone", None, BackgroundBrowser("skipstone"))
+
+    # Google Chrome/Chromium browsers
+    for browser in ("google-chrome", "chrome", "chromium", "chromium-browser"):
+        if shutil.which(browser):
+            register(browser, None, Chrome(browser))
+
+    # Opera, quite popular
+    if shutil.which("opera"):
+        register("opera", None, Opera("opera"))
+
+    # Next, Mosaic -- old but still in use.
+    if shutil.which("mosaic"):
+        register("mosaic", None, BackgroundBrowser("mosaic"))
+
+    # Grail, the Python browser. Does anybody still use it?
+    if shutil.which("grail"):
+        register("grail", Grail, None)
+
+# Prefer X browsers if present
+if os.environ.get("DISPLAY"):
+    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"))
+
+#
+# Platform support for Windows
+#
+
+if sys.platform[:3] == "win":
+    class WindowsDefault(BaseBrowser):
+        def open(self, url, new=0, autoraise=True):
+            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
+
+    _tryorder = []
+    _browsers = {}
+
+    # First try to use the default Windows browser
+    register("windows-default", WindowsDefault)
+
+    # Detect some common Windows browsers, fallback to IE
+    iexplore = os.path.join(os.environ.get("PROGRAMFILES", "C:\\Program Files"),
+                            "Internet Explorer\\IEXPLORE.EXE")
+    for browser in ("firefox", "firebird", "seamonkey", "mozilla",
+                    "netscape", "opera", iexplore):
+        if shutil.which(browser):
+            register(browser, None, BackgroundBrowser(browser))
+
+#
+# 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):
+            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
+
+
+    # Don't clear _tryorder or _browsers since OS X can use above Unix support
+    # (but we prefer using the OS X specific stuff)
+    register("safari", None, MacOSXOSAScript('safari'), -1)
+    register("firefox", None, MacOSXOSAScript('firefox'), -1)
+    register("chrome", None, MacOSXOSAScript('chrome'), -1)
+    register("MacOSX", None, MacOSXOSAScript('default'), -1)
+
+
+# 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, -1)
+            if cmd[1] is None:
+                register(cmdline, None, GenericBrowser(cmdline), -1)
+    cmdline = None # to make del work if _userchoices was empty
+    del cmdline
+    del _userchoices
+
+# what to do if _tryorder is now empty?
+
+
+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()