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 ' + str(reason))
  82     if not reason.check(twisted.web.client.ResponseDone):
  83       self._asyncfailure(reason)
  84       return
  85     try:
  86       self._ssd.flush()
  87     except Exception as e:
  88       self._asyncfailure(e)
  89
  90   def _asyncfailure(self, reason):
  91     self._log(DBG.HTTP_CTRL, '_asyncFailure ' + str(reason))
  92     req_err(self._req, reason)
  93
  94 class ErrorResponseConsumer(twisted.internet.protocol.Protocol):
  95   def __init__(self, req, resp):
  96     self._req = req
  97     self._resp = resp
  98
  99     try:
 100       self._phrase = resp.phrase.decode('utf-8')
 101     except Exception:
 102       self._phrase = repr(resp.phrase)
 103
 104     self._log(DBG.HTTP_CTRL, '__init__ %d %s' % (resp.code, self._phrase))
 105
 106   def _log(self, dflag, msg, **kwargs):
 107     log_debug(dflag,'ERROR-RC '+msg, idof=self._req, **kwargs)
 108
 109   def connectionMade(self):
 110     self._m = b''
 111
 112   def dataReceived(self, data):
 113     self._log(DBG.HTTP_CTRL, 'dataReceived ' + repr(data))
 114     self._m += data
 115
 116   def connectionLost(self, reason):
 117     try:
 118       mbody = self._m.decode('utf-8')
 119     except Exception:
 120       mbody = repr(self._m)
 121     if not reason.check(twisted.web.client.ResponseDone):
 122       mbody += ' || ' + str(reason)
 123     req_err(self._req,
 124             "FAILED %d %s | %s"
 125             % (self._resp.code, self._phrase, mbody))
 126
 127 def req_ok(req, resp):
 128   log_debug(DBG.HTTP_CTRL,
 129             'req_ok %d %s %s' % (resp.code, repr(resp.phrase), str(resp)),
 130             idof=req)
 131   if resp.code == 200:
 132     rc = ResponseConsumer(req)
 133   else:
 134     rc = ErrorResponseConsumer(req, resp)
 135
 136   resp.deliverBody(rc)
 137
 138 def req_err(req, err):
 139   log_debug(DBG.HTTP_CTRL, 'req_err ' + str(err), idof=req)
 140   print(err, file=sys.stderr)
 141   reactor.callLater(c.http_retry, (lambda: req_fin(req)))
 142
 143 def req_fin(req):
 144   global outstanding
 145   outstanding -= 1
 146   log_debug(DBG.HTTP_CTRL, 'req_fin OS=%d' % outstanding, idof=req)
 147   check_outbound()
 148
 149 def check_outbound():
 150   global outstanding
 151
 152   while True:
 153     if                          outstanding >= c.max_outstanding   : break
 154     if not queue.nonempty() and outstanding >= c.target_outstanding: break
 155
 156     d = b''
 157     def moredata(s): nonlocal d; d += s
 158     queue.process((lambda: len(d)),
 159                   moredata,
 160                   c.max_batch_up)
 161
 162     d = mime_translate(d)
 163
 164     crlf = b'\r\n'
 165     lf   =   b'\n'
 166     mime = (b'--b'                                        + crlf +
 167             b'Content-Type: text/plain; charset="utf-8"'  + crlf +
 168             b'Content-Disposition: form-data; name="m"'   + crlf + crlf +
 169             str(c.client)             .encode('ascii')    + crlf +
 170             password                                      + crlf +
 171             str(c.target_outstanding) .encode('ascii')    + crlf +
 172           ((
 173             b'--b'                                        + crlf +
 174             b'Content-Type: application/octet-stream'     + crlf +
 175             b'Content-Disposition: form-data; name="d"'   + crlf + crlf +
 176             d                                             + crlf
 177            ) if len(d) else b'')                               +
 178             b'--b--'                                      + crlf)
 179
 180     #df = open('data.dump.dbg', mode='wb')
 181     #df.write(mime)
 182     #df.close()
 183     # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
 184
 185     log_debug(DBG.HTTP_FULL, 'requesting: ' + str(mime))
 186
 187     hh = { 'User-Agent': ['hippotat'],
 188            'Content-Type': ['multipart/form-data; boundary="b"'],
 189            'Content-Length': [str(len(mime))] }
 190
 191     bytesreader = io.BytesIO(mime)
 192     producer = twisted.web.client.FileBodyProducer(bytesreader)
 193
 194     req = agent.request(b'POST',
 195                         c.url,
 196                         twisted.web.client.Headers(hh),
 197                         producer)
 198
 199     outstanding += 1
 200     log_debug(DBG.HTTP_CTRL, 'request OS=%d' % outstanding, idof=req, d=d)
 201     req.addTimeout(c.http_timeout, reactor)
 202     req.addCallback((lambda resp: req_ok(req, resp)))
 203     req.addErrback((lambda err: req_err(req, err)))
 204
 205 common_startup()
 206 process_cfg()
 207 start_client()
 208 start_ipif(c.ipif_command, outbound)
 209 check_outbound()
 210 common_run()