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