client

   1 #!/usr/bin/python3
   2
   3 from hippotat import *
   4
   5 import twisted.web
   6 import twisted.web.client
   7
   8 import io
   9
  10 client_cs = None
  11
  12 def set_client(ci,cs,pw):
  13   global client_cs
  14   global password
  15   assert(client_cs is None)
  16   client_cs = cs
  17   c.client = ci
  18   c.max_outstanding = cfg.getint(cs, 'max_requests_outstanding')
  19   c.target_outstanding = cfg.getint(cs, 'target_requests_outstanding')
  20   password = pw
  21
  22 def process_cfg():
  23   global url
  24   global max_requests_outstanding
  25
  26   process_cfg_common_always()
  27   process_cfg_server()
  28
  29   try:
  30     c.url = cfg.get('server','url')
  31   except NoOptionError:
  32     process_cfg_saddrs()
  33     c.url = c.saddrs[0].url()
  34
  35   process_cfg_clients(set_client)
  36
  37   c.routes = cfg.get('virtual','routes')
  38   c.max_queue_time = cfg.getint(client_cs, 'max_queue_time')
  39   c.max_batch_up   = cfg.getint(client_cs, 'max_batch_up')
  40   c.http_timeout   = cfg.getint(client_cs, 'http_timeout')
  41   c.http_retry     = cfg.getint(client_cs, 'http_retry')
  42
  43   process_cfg_ipif(client_cs,
  44                    (('local', 'client'),
  45                     ('peer',  'server'),
  46                     ('rnets', 'routes')))
  47
  48 outstanding = 0
  49
  50 def start_client():
  51   global queue
  52   global agent
  53   queue = PacketQueue('up', c.max_queue_time)
  54   agent = twisted.web.client.Agent(reactor, connectTimeout = c.http_timeout)
  55
  56 def outbound(packet, saddr, daddr):
  57   #print('OUT ', saddr, daddr, repr(packet))
  58   queue.append(packet)
  59   check_outbound()
  60
  61 class ResponseConsumer(twisted.internet.protocol.Protocol):
  62   def __init__(self, req):
  63     self._req = req
  64     self._ssd = SlipStreamDecoder(queue_inbound)
  65     self._log(DBG.HTTP_CTRL, '__init__')
  66
  67   def _log(self, dflag, msg, **kwargs):
  68     log_debug(dflag, 'RC ' + msg, idof=self._req, **kwargs)
  69
  70   def dataReceived(self, data):
  71     try: self._ssd.inputdata(mime_translate(data))
  72     except Exception as e: asyncfailure(e)
  73
  74   def connectionMade(self):
  75     self._log(DBG.HTTP_CTRL, 'connectionMade')
  76
  77   def connectionLost(self, reason):
  78     self._log(DBG.HTTP_CTRL, 'connectionLost')
  79     if isinstance(reason, twisted.internet.error.ConnectionDone):
  80       try: self._ssd.flush()
  81       except Exception as e: asyncfailure(e)
  82     else:
  83       asyncfailure(reason)
  84
  85 def req_ok(req, resp):
  86   rc = ResponseConsumer(req)
  87   resp.deliverBody(rc)
  88   req_fin()
  89
  90 def req_err(err):
  91   print(err, file=sys.stderr)
  92   reactor.callLater(c.http_retry, req_fin)
  93
  94 def req_fin(*args):
  95   global outstanding
  96   outstanding -= 1
  97   check_outbound()
  98
  99 def asyncfailure(reason):
 100   global outstanding
 101   outstanding += 1
 102   req_err(reason)
 103
 104 def check_outbound():
 105   global outstanding
 106
 107   while True:
 108     if                          outstanding >= c.max_outstanding   : break
 109     if not queue.nonempty() and outstanding >= c.target_outstanding: break
 110
 111     d = b''
 112     def moredata(s): nonlocal d; d += s
 113     queue.process((lambda: len(d)),
 114                   moredata,
 115                   c.max_batch_up)
 116
 117     d = mime_translate(d)
 118
 119     crlf = b'\r\n'
 120     lf   =   b'\n'
 121     mime = (b'--b'                                        + crlf +
 122             b'Content-Type: text/plain; charset="utf-8"'  + crlf +
 123             b'Content-Disposition: form-data; name="m"'   + crlf + crlf +
 124             str(c.client)             .encode('ascii')    + crlf +
 125             password                                      + crlf +
 126             str(c.target_outstanding) .encode('ascii')    + crlf +
 127           ((
 128             b'--b'                                        + crlf +
 129             b'Content-Type: application/octet-stream'     + crlf +
 130             b'Content-Disposition: form-data; name="d"'   + crlf + crlf +
 131             d                                             + crlf
 132            ) if len(d) else b'')                               +
 133             b'--b--'                                      + crlf)
 134
 135     #df = open('data.dump.dbg', mode='wb')
 136     #df.write(mime)
 137     #df.close()
 138     # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
 139
 140     log_debug(DBG.HTTP_FULL, 'requesting: ' + str(mime))
 141
 142     hh = { 'User-Agent': ['hippotat'],
 143            'Content-Type': ['multipart/form-data; boundary="b"'],
 144            'Content-Length': [str(len(mime))] }
 145
 146     bytesreader = io.BytesIO(mime)
 147     producer = twisted.web.client.FileBodyProducer(bytesreader)
 148
 149     req = agent.request(b'POST',
 150                         c.url,
 151                         twisted.web.client.Headers(hh),
 152                         producer)
 153     req.addTimeout(c.http_timeout, reactor)
 154     req.addCallback((lambda resp: req_ok(req, resp)))
 155     req.addErrback(req_err)
 156     outstanding += 1
 157
 158 common_startup()
 159 process_cfg()
 160 start_client()
 161 start_ipif(c.ipif_command, outbound)
 162 check_outbound()
 163 common_run()