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