#!/usr/bin/env python

 __author__ = "Gustavo Sverzut Barbieri / Artur Duque de Souza"

 __author_email__ = "barbieri@gmail.com / artur.souza@indt.org.br"

 __license__ = "GPL"

 __version__ = "0.4"

 import os

 import threading

 import SocketServer

 import BaseHTTPServer

 import socket

 import urlparse

 import cgi

 import lib.utils as utils

 import logging

 from log import Log

 import lib.transcoder as transcoder

 __all__ = ("RequestHandler")

 class RequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):

     """Class that implements an HTTP request handler for our server."""

     log = logging.getLogger("gms.request")

     def_transcoder = None

     transcoders = utils.PluginSet(transcoder.Transcoder)

     transcoders_log = Log()

     tid_queue = []

     menu = {

         "Log": "/get_log.do",

         "Stop": "/stop-transcoder.do",

         "Status": "/status.do",

         "All Log": "/get_all_log.do",

         "Version": "/version.do",

         "Shutdown": "/shutdown.do"

         }

     @classmethod

     def load_plugins_transcoders(cls, directory):

         cls.transcoders.load_from_directory(directory)

         if cls.def_transcoder is None and cls.transcoders:

             cls.def_transcoder = cls.transcoders[0].name

     # load_plugins_transcoders()

     def do_dispatch(self, body):

         self.url = self.path

         pieces = urlparse.urlparse(self.path)

         self.path = pieces[2]

         self.query = cgi.parse_qs(pieces[4])

         if self.path == "/":

             self.serve_main(body)

         elif self.path == "/shutdown.do":

             self.serve_shutdown(body)

         elif self.path == "/stop-transcoder.do":

             self.serve_stop_transcoder(body)

         elif self.path == "/status.do":

             self.serve_status(body)

         elif self.path == "/version.do":

             self.serve_version(body)

         elif self.path == "/new_id.do":

             self.serve_new_id(body)

         elif self.path == "/get_log.do":

             self.serve_get_log(body)

         elif self.path == "/get_all_log.do":

             self.serve_get_all_log(body)

         elif self.path == "/stream.do":

             self.serve_stream(body)

         else:

             action = self.query.get("action", None)

             if action and "stream.do" in action:

                 self.serve_stream(body)

             else:

                 self.send_error(404, "File not found")

     # do_dispatch()

     def do_GET(self):

         self.do_dispatch(True)

     # do_GET()

     def do_HEAD(self):

         self.do_dispatch(False)

     # do_HEAD()

     def _nav_items(self):

         ret = ""

         for name, url in self.menu.items():

             ret += utils.getHTML("menu", {"name": name, "url": url})

         return ret

     # _nav_items()

     def serve_main(self, body):

         self.send_response(200)

         self.send_header("Content-Type", "text/html")

         self.send_header('Connection', 'close')

         self.end_headers()

         if body:

             self.wfile.write(utils.getHTML("index", {"menu": self._nav_items()}))

     # serve_main()

     def serve_version(self, body):

         self.send_response(200)

         self.send_header("Content-Type", "text/html")

         self.send_header('Connection', 'close')

         self.end_headers()

         if body:

             self.wfile.write("Version: %s" %  __version__)

     def serve_shutdown(self, body):

         self.send_response(200)

         self.send_header("Content-Type", "text/html")

         self.send_header('Connection', 'close')

         self.end_headers()

         if body:

             self.wfile.write(utils.getHTML("shutdown"))

         self.server.server_close()

     # serve_shutdown()

     def serve_stop_all_transcoders(self, body):

         self.send_response(200)

         self.send_header("Content-Type", "text/html")

         self.send_header('Connection', 'close')

         self.end_headers()

         if body:

             self.server.stop_transcoders()

             self.wfile.write(utils.getHTML("stop_all", {"menu": self._nav_items()}))

     # serve_stop_all_transcoders()

     def serve_stop_selected_transcoders(self, body, tids=[]):

         self.send_response(200)

         self.send_header("Content-Type", "text/html")

         self.send_header('Connection', 'close')

         self.end_headers()

         opts = ""

         if body:

             transcoders = self.server.get_transcoders()

             for tid in tids:

                 for t, r in transcoders:

                     if t.tid == int(tid):

                         try:

                             t.stop()

                         except Exception, e:

                             self.log.info("Plugin already stopped")

                         opts += utils._create_html_item("%s" % t)

                         break

                 self.wfile.write(utils.getHTML("stop_selected",

                                                {"menu": self._nav_items(),

                                                 "opts": opts}))

     # serve_stop_selected_transcoders()

     def serve_stop_transcoder(self, body):

         req = self.query.get("request", None)

         tid = self.query.get("tid", None)

         if req and "all" in req:

             self.serve_stop_all_transcoders(body)

         elif tid:

             self.serve_stop_selected_transcoders(body, tid[0].split(";"))

         else:

             self.serve_status(body)

     # serve_stop_transcoder()

     def serve_status(self, body):

         self.send_response(200)

         self.send_header("Content-Type", "text/html")

         self.send_header('Connection', 'close')

         self.end_headers()

         stopone = ""

         if body:

             tl = self.server.get_transcoders()

             if not tl:

                 running = "<p>No running transcoder.</p>\n"

                 stopall = ""

                 stopone = ""

             elif self.query.get("tid", None):

                 req_tid = int(self.query.get("tid")[0])

                 for transcoder, request in tl:

                     if transcoder.tid == req_tid:

                         self.wfile.write("Status: %s %%" % transcoder.status)

                         return True

                 return False

             else:

                 running = "<p>Running transcoders:</p>\n"

                 stopall = utils._create_html_item("<a href='%s?request=all'>"

                                                  "[STOP ALL]</a>" %

                                                  self.menu["Stop"])

                 for transcoder, request in tl:

                     stopone += utils._create_html_item("%s;"

                                                        "<a href='%s?tid=%s'>"

                                                        " [STOP] </a>") % (

                         transcoder, self.menu["Stop"], transcoder.tid)

             self.wfile.write(utils.getHTML("status",

                                            {"menu": self._nav_items(),

                                             "running": running,

                                             "stopall": stopall,

                                             "stopone": stopone}))

     # serve_status()

     def _get_transcoder(self):

         # get transcoder option: mencoder is the default

         request_transcoders = self.query.get("transcoder", ["mencoder"])

         for t in request_transcoders:

             transcoder = self.transcoders.get(t)

             if transcoder:

                 return transcoder

         if not transcoder:

             return self.transcoders[self.def_transcoder]

     # _get_transcoder()

     def _get_new_id(self, tid):

         self.server.last_tid = utils.create_tid(tid)

         self.tid_queue.append(self.server.last_tid)

         return self.server.last_tid

     # _get_new_id()

     def serve_new_id(self, body):

         self.send_response(200)

         self.send_header("Content-Type", "text/html")

         self.send_header('Connection', 'close')

         self.end_headers()

         if body:

             self.wfile.write("%s" % self._get_new_id(self.server.last_tid))

     # serve_new_id()

     def serve_get_log(self, body):

         self.send_response(200)

         self.send_header("Content-Type", "text/html")

         self.send_header('Connection', 'close')

         self.end_headers()

         if body:

             if self.query.get("tid", None):

                 tid = int(self.query.get("tid")[0])

                 stat = self.transcoders_log.get_status(tid)

                 self.wfile.write("%s" % stat)

             else:

                 stat = self.transcoders_log.get_status()

                 for rtid, status in stat.iteritems():

                     self.wfile.write("<b>%s</b>: %s<br><br>" % (rtid, status))

     # serve_get_log()

     def serve_get_all_log(self, body):

         self.send_response(200)

         self.send_header("Content-Type", "text/html")

         self.send_header('Connection', 'close')

         self.end_headers()

         if body:

             if self.query.get("tid", None):

                 tid = int(self.query.get("tid")[0])

                 stat = self.transcoders_log.get_status(tid, True)

                 for status in stat:

                     self.wfile.write("%s<br><br>" % status)

             else:

                 stat = self.transcoders_log.get_status(None, True)

                 for rtid, history in stat.iteritems():

                     for status in history:

                         self.wfile.write("<b>%s</b>: %s<br>" % (rtid, status))

                     self.wfile.write("<br><br>")

     # serve_get_all_log()

     def serve_stream(self, body):

         transcoder = self._get_transcoder()

         try:

             obj = transcoder(self.query)

         except Exception, e:

             self.send_error(500, str(e))

             return

         self.send_response(200)

         self.send_header("Content-Type", obj.get_mimetype())

         self.send_header('Connection', 'close')

         self.end_headers()

         if body:

             test_tid = int(self.query.get("tid", "0")[0])

             if test_tid == 0 or test_tid not in self.tid_queue:

                 test_tid = self._get_new_id(self.server.last_tid)

             self.transcoders_log.insert(test_tid, "gms.%s" % obj.name)

             obj.tid = test_tid

             obj.log = self.transcoders_log

             self.server.add_transcoders(self, obj)

             obj.start(self.wfile)

             self.server.del_transcoders(self, obj)

     # serve_stream()

     def log_request(self, code='-', size='-'):

         self.log.info('"%s" %s %s', self.requestline, str(code), str(size))

     # log_request()

     def log_error(self, format, *args):

         self.log.error("%s: %s" % (self.address_string(), format % args))

     # log_error()

     def log_message(self, format, *args):

         self.log.info("%s: %s" % (self.address_string(), format % args))

     # log_message()

 # RequestHandler