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     c.url = 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   c.http_timeout   = cfg.getint(client_cs, 'http_timeout')
  39   c.http_retry     = cfg.getint(client_cs, 'http_retry')
  40
  41   process_cfg_ipif(client_cs,
  42                    (('local', 'client'),
  43                     ('peer',  'server'),
  44                     ('rnets', 'routes')))
  45
  46 outstanding = 0
  47
  48 def start_client():
  49   global queue
  50   global agent
  51   queue = PacketQueue('up', c.max_queue_time)
  52   agent = twisted.web.client.Agent(reactor, connectTimeout = c.http_timeout)
  53
  54 def outbound(packet, saddr, daddr):
  55   #print('OUT ', saddr, daddr, repr(packet))
  56   queue.append(packet)
  57   check_outbound()
  58
  59 class ResponseConsumer(twisted.internet.protocol.Protocol):
  60   def __init__(self):
  61     self._ssd = SlipStreamDecoder(queue_inbound)
  62   def dataReceived(self, data):
  63     try: self._ssd.inputdata(mime_translate(data))
  64     except Exception as e: asyncfailure(e)
  65   def connectionMade(self): pass
  66   def connectionLost(self, reason):
  67     if isinstance(reason, twisted.internet.error.ConnectionDone):
  68       try: self._ssd.flush()
  69       except Exception as e: asyncfailure(e)
  70     else:
  71       asyncfailure(reason)
  72
  73 def req_ok(resp):
  74   resp.deliverBody(ResponseConsumer())
  75   req_fin()
  76
  77 def req_err(err):
  78   print(err, file=sys.stderr)
  79   reactor.callLater(c.http_retry, req_fin)
  80
  81 def req_fin(*args):
  82   global outstanding
  83   outstanding -= 1
  84   check_outbound()
  85
  86 def asyncfailure(reason):
  87   global outstanding
  88   outstanding += 1
  89   req_err(reason)
  90
  91 def check_outbound():
  92   global outstanding
  93
  94   while True:
  95     if                          outstanding >= c.max_outstanding   : break
  96     if not queue.nonempty() and outstanding >= c.target_outstanding: break
  97
  98     d = b''
  99     def moredata(s): nonlocal d; d += s
 100     queue.process((lambda: len(d)),
 101                   moredata,
 102                   c.max_batch_up)
 103
 104     crlf = b'\r\n'
 105     lf   =   b'\n'
 106     mime = (b'--b'                                        + crlf +
 107             b'Content-Type: text/plain; charset="utf-8"'  + crlf +
 108             b'Content-Disposition: form-data; name="m"'   + crlf + crlf +
 109             str(c.client)             .encode('ascii')    + crlf +
 110             password                                      + crlf +
 111             str(c.target_outstanding) .encode('ascii')    + crlf +
 112           ((
 113             b'--b'                                        + crlf +
 114             b'Content-Type: application/octet-stream'     + crlf +
 115             b'Content-Disposition: form-data; name="d"'   + crlf + crlf +
 116             mime_translate(d)                             + crlf
 117            ) if len(d) else b'')                               +
 118             b'--b--'                                      + crlf)
 119
 120     #df = open('data.dump.dbg', mode='wb')
 121     #df.write(mime)
 122     #df.close()
 123     # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
 124
 125     log_debug(DBG.HTTP_FULL, 'requesting: ' + str(mime))
 126
 127     hh = { 'User-Agent': ['hippotat'],
 128            'Content-Type': ['multipart/form-data; boundary="b"'],
 129            'Content-Length': [str(len(mime))] }
 130     req = agent.request(b'POST',
 131                         c.url,
 132                         twisted.web.client.Headers(hh))
 133     req.addTimeout(c.http_timeout, reactor)
 134     req.addCallbacks(req_ok, req_err)
 135     outstanding += 1
 136
 137 common_startup()
 138 process_cfg()
 139 start_client()
 140 start_ipif(c.ipif_command, outbound)
 141 check_outbound()
 142 common_run()