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#!@PYTHON@
# -*-python-*-
# $Id$ 

# This file is part of avahi.
#
# avahi is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# avahi is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with avahi; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA.

import sys, getopt

try:
    import avahi, gobject, dbus
except ImportError:
    print "Sorry, to use this tool you need to install Avahi, pygtk and python-dbus."
    sys.exit(1)

try:
    import dbus.glib
except ImportError:
    pass

try:
    from twisted.internet import glib2reactor
    glib2reactor.install()
    from twisted.internet import reactor
    from twisted.web import server, resource
except ImportError:
    print "Sorry, to use this tool you need to install twisted and twisted.web."
    sys.exit(1)

urlproto = { "_http._tcp" : "http",  "_https._tcp" : "https", "_ftp._tcp" : "ftp" }

port = 8080
address = "127.0.0.1"
use_host_names = None
domain = "local"

class AvahiBookmarks(resource.Resource):
    isLeaf = True

    services = {}

    def __init__(self, use_host_names):
        resource.Resource.__init__(self)

        self.bus = dbus.SystemBus()
        self.server = dbus.Interface(self.bus.get_object(avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER), avahi.DBUS_INTERFACE_SERVER)

        self.version_string = self.server.GetVersionString()

        self.browse_service_type("_http._tcp")
        self.browse_service_type("_https._tcp")
        self.browse_service_type("_ftp._tcp")

        if use_host_names is None:
            try: 
                self.use_host_names = self.server.IsNSSSupportAvailable()
            except:
                self.use_host_names = False
        else:
            self.use_host_names = use_host_names

    def browse_service_type(self, stype):

        global domain

        browser = dbus.Interface(self.bus.get_object(avahi.DBUS_NAME, self.server.ServiceBrowserNew(avahi.IF_UNSPEC, avahi.PROTO_UNSPEC, stype, domain, dbus.UInt32(0))), avahi.DBUS_INTERFACE_SERVICE_BROWSER)
        browser.connect_to_signal('ItemNew', self.new_service)
        browser.connect_to_signal('ItemRemove', self.remove_service)

    def find_path(self, txt):

        l = avahi.txt_array_to_string_array(txt)

        for k in l:
            if k[:5] == "path=":
                if k[5:].startswith("/"):
                    return k[5:]
                else:
                    return "/" + k[5:]

        return "/"

    def render_GET(self, request):

        t = '<html><head><title>Zeroconf Bookmarks</title></head><body><h1>Zeroconf Bookmarks</h1>'

        if len(self.services) == 0:
            t += '<p>Sorry, no web services have been registered on the local LAN.</p>'
        else:
            t += '<ul style="padding: 0px; margin: 20px; list-style-type: none">'

            for k, v in self.services.iteritems():
            
                if v[3] == 80:
                    port = ''
                else:
                    port = ':%i' % v[3]

                path = self.find_path(v[4])
                t += '<li><a href="%s://%s%s%s">%s</a></li>' % (urlproto[k[3]], v[2], port, path, k[2])
                
            t += '</ul>'
        
        t += '<hr noshade/><p style="font-size: 8; font-family: sans-serif">Served by %s</p></body></html>' % self.version_string

        return str(t)


    def new_service(self, interface, protocol, name, type, domain, flags):

        interface, protocol, name, type, domain, host, aprotocol, address, port, txt, flags = self.server.ResolveService(interface, protocol, name, type, domain, avahi.PROTO_UNSPEC, dbus.UInt32(0))

        if self.use_host_names:
            h = host
        else:
            if aprotocol == avahi.PROTO_INET6:
                h = "[" + address + "]"
            else:
                h = address

        self.services[(interface, protocol, name, type, domain)] = (host, aprotocol, h, port, txt)

    def remove_service(self, interface, protocol, name, type, domain):
        del self.services[(interface, protocol, name, type, domain)]


def usage(retval = 0):
    print "%s [options]\n" % sys.argv[0]
    print "   -h --help             Show this help"
    print "   -p --port PORT        Specify the port to use (default %u)" % port
    print "   -a --address ADDRESS  Specify the address to bind to (default %s)" % address
    print "   -H --host-names       Show links with real hostnames"
    print "   -A --addresses        Show links with numeric IP addresses"
    print "   -d --domain DOMAIN    Specify the domain to browse" 
    sys.exit(retval)

try:
    opts, args = getopt.getopt(sys.argv[1:], "hp:a:HAd:", ["help", "port=", "address=", "host-names", "addresses", "domain="])
except getopt.GetoptError:
    usage(2)

for o, a in opts:
    if o in ("-h", "--help"):
        usage()

    if o in ("-p", "--port"):
        port = int(a)

    if o in ("-a", "--address"):
        address = a

    if o in ("-H", "--host-names"):
        use_host_names = True

    if o in ("-A", "--addresses"):
        use_host_names = False

    if o in ("-d", "--domain"):
        domain = a

site = server.Site(AvahiBookmarks(use_host_names))
reactor.listenTCP(port, site, interface=address)

print "Now point your web browser to http://%s:%u/!" % (address, port)

try:
    reactor.run()
except KeyboardInterrupt, k:
    pass