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     self._log(DBG.HTTP_CTRL, 'dataReceived', d=data)
  72     try:
  73       self._ssd.inputdata(mime_translate(data))
  74     except Exception as e:
  75       self._asyncfailure(e)
  76
  77   def connectionMade(self):
  78     self._log(DBG.HTTP_CTRL, 'connectionMade')
  79
  80   def connectionLost(self, reason):
  81     self._log(DBG.HTTP_CTRL, 'connectionLost')
  82     if isinstance(reason, twisted.internet.error.ConnectionDone):
  83       try: self._ssd.flush()
  84       except Exception as e:
  85         self._asyncfailure(e)
  86     else:
  87       self._asyncfailure(reason)
  88
  89   def _asyncfailure(self, reason):
  90     global outstanding
  91     outstanding += 1
  92     req_err(reason)
  93
  94 def req_ok(req, resp):
  95   rc = ResponseConsumer(req)
  96   resp.deliverBody(rc)
  97   req_fin()
  98
  99 def req_err(err):
 100   print(err, file=sys.stderr)
 101   reactor.callLater(c.http_retry, req_fin)
 102
 103 def req_fin(*args):
 104   global outstanding
 105   outstanding -= 1
 106   check_outbound()
 107
 108 def asyncfailure(reason):
 109   global outstanding
 110   outstanding += 1
 111   req_err(reason)
 112
 113 def check_outbound():
 114   global outstanding
 115
 116   while True:
 117     if                          outstanding >= c.max_outstanding   : break
 118     if not queue.nonempty() and outstanding >= c.target_outstanding: break
 119
 120     d = b''
 121     def moredata(s): nonlocal d; d += s
 122     queue.process((lambda: len(d)),
 123                   moredata,
 124                   c.max_batch_up)
 125
 126     d = mime_translate(d)
 127
 128     crlf = b'\r\n'
 129     lf   =   b'\n'
 130     mime = (b'--b'                                        + crlf +
 131             b'Content-Type: text/plain; charset="utf-8"'  + crlf +
 132             b'Content-Disposition: form-data; name="m"'   + crlf + crlf +
 133             str(c.client)             .encode('ascii')    + crlf +
 134             password                                      + crlf +
 135             str(c.target_outstanding) .encode('ascii')    + crlf +
 136           ((
 137             b'--b'                                        + crlf +
 138             b'Content-Type: application/octet-stream'     + crlf +
 139             b'Content-Disposition: form-data; name="d"'   + crlf + crlf +
 140             d                                             + crlf
 141            ) if len(d) else b'')                               +
 142             b'--b--'                                      + crlf)
 143
 144     #df = open('data.dump.dbg', mode='wb')
 145     #df.write(mime)
 146     #df.close()
 147     # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
 148
 149     log_debug(DBG.HTTP_FULL, 'requesting: ' + str(mime))
 150
 151     hh = { 'User-Agent': ['hippotat'],
 152            'Content-Type': ['multipart/form-data; boundary="b"'],
 153            'Content-Length': [str(len(mime))] }
 154
 155     bytesreader = io.BytesIO(mime)
 156     producer = twisted.web.client.FileBodyProducer(bytesreader)
 157
 158     req = agent.request(b'POST',
 159                         c.url,
 160                         twisted.web.client.Headers(hh),
 161                         producer)
 162     req.addTimeout(c.http_timeout, reactor)
 163     req.addCallback((lambda resp: req_ok(req, resp)))
 164     req.addErrback(req_err)
 165     outstanding += 1
 166
 167 common_startup()
 168 process_cfg()
 169 start_client()
 170 start_ipif(c.ipif_command, outbound)
 171 check_outbound()
 172 common_run()