client

   1 #!/usr/bin/python3
   2
   3 from hippotat import *
   4
   5 import twisted.web
   6 import twisted.web.client
   7
   8 client_cs = None
   9
  10 def set_client(ci,cs,pw):
  11   global client_cs
  12   global password
  13   assert(client_cs is None)
  14   client_cs = cs
  15   c.client = ci
  16   c.max_outstanding = cfg.getint(cs, 'max_requests_outstanding')
  17   c.target_outstanding = cfg.getint(cs, 'target_requests_outstanding')
  18   password = pw
  19
  20 def process_cfg():
  21   global url
  22   global max_requests_outstanding
  23
  24   process_cfg_common_always()
  25   process_cfg_server()
  26
  27   try:
  28     c.url = cfg.get('server','url')
  29   except NoOptionError:
  30     process_cfg_saddrs()
  31     sa = c.saddrs[0].url()
  32
  33   process_cfg_clients(set_client)
  34
  35   c.routes = cfg.get('virtual','routes')
  36   c.max_queue_time = cfg.getint(client_cs, 'max_queue_time')
  37   c.max_batch_up   = cfg.getint(client_cs, 'max_batch_up')
  38
  39   process_cfg_ipif(client_cs,
  40                    (('local', 'client'),
  41                     ('peer',  'server'),
  42                     ('rnets', 'routes')))
  43
  44 outstanding = 0
  45
  46 def start_client():
  47   global queue
  48   global agent
  49   queue = PacketQueue(c.max_queue_time)
  50   agent = twisted.web.client.Agent(reactor, connectTimeout = c.http_timeout)
  51
  52 def outbound(packet, saddr, daddr):
  53   #print('OUT ', saddr, daddr, repr(packet))
  54   queue.append(packet)
  55   check_outbound()
  56
  57 class ResponseConsumer(twisted.internet.protocol.Protocol):
  58   def __init__(self):
  59     self._ssd = SlipStreamDecoder(queue_inbound)
  60   def dataReceived(self, data):
  61     self._ssd.inputdata(mime_translate(data))
  62   def connectionMade(self): pass
  63   def connectionLost(self, reason):
  64     if isinstance(reason, twisted.internet.error.ConnectionDone):
  65       self._ssd.flush()
  66     else:
  67       print(reason, file=sys.stderr)
  68
  69 def req_ok(resp):
  70   resp.deliverBody(ResponseConsumer())
  71
  72 def req_err(err):
  73   print(err, file=sys.stderr)
  74
  75 def req_fin(*args):
  76   outstanding -= 1
  77
  78 def check_outbound():
  79   while True:
  80     if                          outstanding >= c.max_outstanding   : break
  81     if not queue.nonempty() and outstanding >= c.target_outstanding: break
  82
  83     d = b''
  84     def moredata(s): global d; d += s
  85     queue.process((lambda: len(d)),
  86                   moredata,
  87                   c.max_batch_up)
  88     assert(len(d))
  89
  90     crlf = b'\r\n'
  91     mime = (b'--b'                                      + crlf +
  92             b'Content-Disposition: form-data; name="m"' + crlf +
  93             password                                    + crlf +
  94             c.client                                    + crlf +
  95             c.target_outstanding                        + crlf +
  96             b'--b'                                      + crlf +
  97             b'Content-Disposition: form-data; name="d"' + crlf +
  98             mime_translate(d)                           + crlf +
  99             b'--b--'                                    + crlf)
 100
 101     hh = { 'User-Agent': ['hippotat'],
 102            'Content-Type': ['multipart/form-data; boundary="b"'] }
 103     req = agent.request(b'POST',
 104                         c.url,
 105                         twisted.web.client.Headers(hh))
 106     req.addTimeout(c.http_timeout)
 107     req.addCallbacks(req_ok, req_err)
 108     req.addBoth(req_fin)
 109     outstanding += 1
 110
 111 common_startup()
 112 process_cfg()
 113 start_client()
 114 start_ipif(c.ipif_command, outbound)
 115 common_run()