gmyth: gmyth-stream/server/0.2/lib/server.py@170e18a7ca71

     1 #!/usr/bin/env python

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

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

     5 __license__ = "GPL"

     6 __version__ = "0.3"

     8 import os

     9 import threading

    10 import SocketServer

    11 import BaseHTTPServer

    12 import socket

    13 import urlparse

    14 import cgi

    15 import lib.utils as utils

    16 import logging as log

    18 __all__ = ("Transcoder", "RequestHandler", "Server", "serve_forever",

    19            "load_plugins_transcoders")

    21 class Transcoder(object):

    22     log = log.getLogger("gms.transcoder")

    23     priority = 0   # negative values have higher priorities

    24     name = None # to be used in requests

    26     def __init__(self, params):

    27         self.params = params

    28     # __init__()

    31     def params_first(self, key, default=None):

    32         if default is None:

    33             return self.params[key][0]

    34         else:

    35             try:

    36                 return self.params[key][0]

    37             except:

    38                 return default

    39     # params_first()

    42     def get_mimetype(self):

    43         mux = self.params_first("mux", "mpg")

    45         if mux == "mpeg":

    46             return "video/mpeg"

    47         elif mux == "avi":

    48             return "video/x-msvideo"

    49         else:

    50             return "application/octet-stream"

    51     # get_mimetype()

    54     def start(self, outfile):

    55         return True

    56     # start()

    59     def stop(self):

    60         return Tru

    61     # stop()

    64     def __str__(self):

    65         return '%s("%s", mux="%s", params=%s, addr=%s)' % \

    66                (self.__class__.__name__,

    67                 self.params_first("uri", "None"),

    68                 self.params_first("mux", "mpg"),

    69                 self.params,

    70                 repr(self))

    71     # __str__()

    72 # Transcoder

    76 class RequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):

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

    78     def_transcoder = None

    79     transcoders = utils.PluginSet(Transcoder)

    81     @classmethod

    82     def load_plugins_transcoders(cls, directory):

    83         cls.transcoders.load_from_directory(directory)

    85         if cls.def_transcoder is None and cls.transcoders:

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

    87     # load_plugins_transcoders()

    90     def do_dispatch(self, body):

    91         self.url = self.path

    93         pieces = urlparse.urlparse(self.path)

    94         self.path = pieces[2]

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

    97         if self.path == "/":

    98             self.serve_main(body)

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

   100             self.serve_shutdown(body)

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

   102             self.serve_stop_transcoder(body)

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

   104             self.serve_status(body)

   105         elif self.path == "/play.do":

   106             self.serve_play(body)

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

   108             self.serve_stream(body)

   109         else:

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

   111     # do_dispatch()

   114     def do_GET(self):

   115         self.do_dispatch(True)

   116     # do_GET()

   119     def do_HEAD(self):

   120         self.do_dispatch(False)

   121     # do_HEAD()

   124     def _nav_items(self):

   125         self.wfile.write("""\

   126    <li><a href="/play.do">Play</a></li>

   127    <li><a href="/status.do">Status</a></li>

   128    <li><a href="/stop-transcoder.do">Stop transcoders</a></li>

   129    <li><a href="/shutdown.do">Shutdown Server</a></li>

   130 """)

   131     # _nav_items()

   134     def serve_main(self, body):

   135         self.send_response(200)

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

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

   138         self.end_headers()

   139         if body:

   140             self.wfile.write("""\

   141 <html>

   142    <head><title>GMyth-Streamer Server</title></head>

   143    <body>

   144 <h1>Welcome to GMyth-Streamer Server</h1>

   145 <ul>

   146 """)

   147             self._nav_items()

   148             self.wfile.write("""\

   149 </ul>

   150    </body>

   151 </html>

   152 """)

   153     # serve_main()

   156     def serve_play(self, body):

   157         self.send_response(200)

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

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

   160         self.end_headers()

   161         if body:

   162             self.wfile.write("""\

   163 <html>

   164    <head><title>GMyth-Streamer Server</title></head>

   165    <body>

   166    <h1>Play</h1>

   167    <form action="/stream.do" method="GET">

   168       <input type="text" name="type" value="file" />://<input type="text" name="location" value=""/>

   169       <input type="submit" />

   170    </form>

   171    <ul>

   172 """)

   173             self._nav_items()

   174             self.wfile.write("""\

   175    </ul>

   176    </body>

   177 </html>

   178 """)

   179     # serve_play()

   182     def serve_shutdown(self, body):

   183         self.send_response(200)

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

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

   186         self.end_headers()

   187         if body:

   188             self.wfile.write("""\

   189 <html>

   190    <head><title>GMyth-Streamer Server Exited</title></head>

   191    <body>

   192       <h1>GMyth-Streamer is not running anymore</h1>

   193    </body>

   194 </html>

   195 """)

   196         self.server.server_close()

   197     # serve_shutdown()

   200     def serve_stop_all_transcoders(self, body):

   201         self.send_response(200)

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

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

   204         self.end_headers()

   205         if body:

   206             self.server.stop_transcoders()

   207             self.wfile.write("""\

   208 <html>

   209    <head><title>GMyth-Streamer Server Stopped Transcoders</title></head>

   210    <body>

   211       <h1>GMyth-Streamer stopped running transcoders</h1>

   212       <ul>

   213 """)

   214             self._nav_items()

   215             self.wfile.write("""\

   216       </ul>

   217    </body>

   218 </html>

   219     """)

   220     # serve_stop_all_transcoders()

   223     def serve_stop_selected_transcoders(self, body, requests):

   224         self.send_response(200)

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

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

   227         self.end_headers()

   228         if body:

   229             self.wfile.write("""\

   230 <html>

   231    <head><title>GMyth-Streamer Server Stopped Transcoders</title></head>

   232    <body>

   233       <h1>GMyth-Streamer stopped running transcoders:</h1>

   234       <ul>

   235     """)

   236             transcoders = self.server.get_transcoders()

   238             for req in requests:

   239                 try:

   240                     host, port = req.split(":")

   241                 except IndexError:

   242                     continue

   244                 port = int(port)

   245                 addr = (host, port)

   247                 for t, r in transcoders:

   248                     if r.client_address == addr:

   249                         try:

   250                             t.stop()

   251                         except Exception, e:

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

   254                         self.wfile.write("""\

   255          <li>%s: %s:%s</li>

   256 """ % (t, addr[0], addr[1]))

   257                         break

   258             self.wfile.write("""\

   259       </ul>

   260       <ul>

   261 """)

   262             self._nav_items()

   263             self.wfile.write("""\

   264       </ul>

   265    </body>

   266 </html>

   267 """)

   268     # serve_stop_selected_transcoders()

   271     def serve_stop_transcoder(self, body):

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

   273         if req and "all" in req:

   274             self.serve_stop_all_transcoders(body)

   275         elif req:

   276             self.serve_stop_selected_transcoders(body, req)

   277         else:

   278             self.serve_status(body)

   279     # serve_stop_transcoder()

   282     def serve_status(self, body):

   283         self.send_response(200)

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

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

   286         self.end_headers()

   287         if body:

   288             self.wfile.write("""\

   289 <html>

   290    <head><title>GMyth-Streamer Server Status</title></head>

   291    <body>

   292       <h1>GMyth-Streamer Status</h1>

   293 """)

   294             tl = self.server.get_transcoders()

   295             if not tl:

   296                 self.wfile.write("<p>No running transcoder.</p>\n")

   297             else:

   298                 self.wfile.write("<p>Running transcoders:</p>\n")

   299                 self.wfile.write("""\

   300       <ul>

   301          <li><a href="/stop-transcoder.do?request=all">[STOP ALL]</a></li>

   302 """)

   303                 for transcoder, request in tl:

   304                     self.wfile.write("""\

   305       <li>%s: %s:%s <a href="/stop-transcoder.do?request=%s:%s">[STOP]</a></li>

   306 """ % (transcoder, request.client_address[0], request.client_address[1],

   307        request.client_address[0], request.client_address[1]))

   309                 self.wfile.write("""\

   310       </ul>

   311       <ul>

   312 """)

   313             self._nav_items()

   314             self.wfile.write("""\

   315       </ul>

   316    </body>

   317 </html>

   318 """)

   319     # serve_status()

   322     def _get_transcoder(self):

   323         # get transcoder option: mencoder is the default

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

   326         for t in request_transcoders:

   327             transcoder = self.transcoders.get(t)

   328             if transcoder:

   329                 return transcoder

   331         if not transcoder:

   332             return self.transcoders[self.def_transcoder]

   333     # _get_transcoder()

   336     def serve_stream(self, body):

   337         transcoder = self._get_transcoder()

   338         try:

   339             obj = transcoder(self.query)

   340         except Exception, e:

   341             self.send_error(500, str(e))

   342             return

   344         self.send_response(200)

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

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

   347         self.end_headers()

   349         if body:

   350             self.server.add_transcoders(self, obj)

   351             obj.start(self.wfile)

   352             self.server.del_transcoders(self, obj)

   353     # serve_stream()

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

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

   358     # log_request()

   361     def log_error(self, format, *args):

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

   363     # log_error()

   366     def log_message(self, format, *args):

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

   368     # log_message()

   369 # RequestHandler

   373 class Server(SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer):

   374     log = log.getLogger("gms.server")

   375     run = True

   376     _transcoders = {}

   377     _lock = threading.RLock()

   379     def serve_forever(self):

   380         self.log.info("GMyth-Streamer serving HTTP on %s:%s" %

   381                       self.socket.getsockname())

   382         try:

   383             while self.run:

   384                 self.handle_request()

   385         except KeyboardInterrupt, e:

   386             pass

   388         self.log.debug("Stopping all remaining transcoders...")

   389         self.stop_transcoders()

   390         self.log.debug("Transcoders stopped!")

   391     # serve_forever()

   394     def get_request(self):

   395         skt = self.socket

   396         old = skt.gettimeout()

   397         skt.settimeout(0.5)

   398         while self.run:

   399             try:

   400                 r = skt.accept()

   401                 skt.settimeout(old)

   402                 return r

   403             except socket.timeout, e:

   404                 pass

   405         raise socket.error("Not running")

   406     # get_request()

   409     def server_close(self):

   410         self.run = False

   411         self.stop_transcoders()

   413         BaseHTTPServer.HTTPServer.server_close(self)

   414     # server_close()

   417     def stop_transcoders(self):

   418         self._lock.acquire()

   419         for transcoder, request in self._transcoders.iteritems():

   420             self.log.info("Stop transcoder: %s, client=%s" %

   421                           (transcoder, request.client_address))

   422             transcoder.stop()

   423         self._lock.release()

   424     # stop_transcoders()

   427     def get_transcoders(self):

   428         self._lock.acquire()

   429         try:

   430             return self._transcoders.items()

   431         finally:

   432             self._lock.release()

   433     # get_transcoders()

   436     def add_transcoders(self, request, transcoder):

   437         self._lock.acquire()

   438         try:

   439             self._transcoders[transcoder] = request

   440         finally:

   441             self._lock.release()

   442     # add_transcoders()

   445     def del_transcoders(self, request, transcoder):

   446         self._lock.acquire()

   447         try:

   448             del self._transcoders[transcoder]

   449         finally:

   450             self._lock.release()

   451     # del_transcoders()

   452 # Server

   456 def serve_forever(host="0.0.0.0", port=40000):

   457     addr = (host, port)

   459     RequestHandler.protocol_version = "HTTP/1.0"

   460     httpd = Server(addr, RequestHandler)

   461     httpd.serve_forever()

   462 # serve_forever()

   465 def load_plugins_transcoders(directory):

   466     RequestHandler.load_plugins_transcoders(directory)

   467 # load_plugins_transcoders()

author	renatofilho
	Fri Apr 20 21:48:57 2007 +0100 (2007-04-20)
branch	trunk
changeset 584	170e18a7ca71
parent 574	2dfea125c76c
child 585	a1783dab9ba6
permissions	-rw-r--r--